TW200904386A - Surface sheet for absorptive article, method of producing the surface sheet, and absorptive article - Google Patents

Abstract

A surface sheet (1) for an absorptive article is constructed by forming on a non-woven fabric (2) a front surface section (3) and a large number of liquid introduction depressions (4). The front surface section (3) has a front surface (31) coming into contact with a wearer's skin. The large number of liquid introduction depressions (4) each have a front surface (41) that is the depressed side and rear surface (42) that is the protruded side protruded toward an absorptive body. Each liquid introduction depression (4) has a peripheral wall section (43) and a bottom surface section (44). The bottom surface section (44) is located closer to the absorptive body than a rear surface (32) of the front surface section (3). The thickness (Ta) of the peripheral wall section (43) at a portion (A) adjacent to the bottom surface section (44) is less than the thickness (T1) of the front surface section (3).

Description

200904386 IX. Description of the Invention: [Technical Field] The present invention relates to a front sheet of an absorbent article such as a sanitary napkin, a sanitary pad (excretion sheet), an incontinence guard, and a method of manufacturing the same. Further, the present invention relates to an absorbent article for absorbing a liquid which is discharged from the body, such as a sanitary napkin, a sanitary squeegee (excrement sheet), an incontinence pad or the like. [Prior Art] As a front sheet of a sanitary napkin or the like, it is known that the front surface has irregularities. For example, a non-woven fabric sheet having a protruding three-dimensional opening on one side is known (refer to the sheet disclosed in Patent Document 1): a ring-shaped solidified by a fiber material formed by heat and formed around a hole The front sheet of the prior art is obtained by piercing the sharp protrusion of the tip into the non-woven fabric, and twisting the portion around the protrusion to form a three-dimensional opening. Ο LL is known to have a protruding toward the absorbent body. The three-dimensionally-opened non-woven fabric is used as the top of the between the positive opening of the three-dimensional opening - the thickness of the sheet is a, the thickness of the sheet at the lower end of the opening is thick, and the top is The sheet of the substantially middle portion of the lower end portion is strictly in contact with the sheet (see Patent Document 2). Patent Document 2 discloses: / The sharp protrusion of the tip is pierced into the non-woven fabric and σ... In addition, a three-dimensional opening is formed. In addition, the right non-woven upper surface sheet is proposed: a thermoplastic film is dissolved to form a guide recess and a continuous muscle at the edge of the catheter recess. 131510.doc 200904386 In the region, a plurality of liquid-conducting slits are provided on the bottom surface and the side portion of the duct recess (refer to Patent Document 3). The front sheet of Patent Document 3 utilizes a lower degree of fiber freedom (ease of movement) in the nonwoven fabric, and In the case of forming a catheter recess, a liquid-guiding slit is formed. Patent Document 1: Japanese Laid-Open Patent Publication No. Hei. No. Hei. No. Hei. No. Hei. No. Hei. No. Hei. In the above-mentioned conventional front sheet, when the three-dimensional opening is used for a sanitary napkin or the like, the color of the menstrual blood absorbed by the absorbent body passes through the opening. In addition, since the lower end is opened by σ, the three-dimensional shape is easily crushed, or the recovery from the crushed state is poor, so that the cushioning property is likely to be insufficient. Further, the film of Patent Document 1 #中, the solidified area around the hole hinders the movement of the liquid from the front of the sheet due to the movement of the liquid in the infiltrated sheet, so the mobility of the liquid from the front side of the sheet to the absorber is more In addition, since the front sheet of Patent Document 3 has a liquid-conducting slit formed at the bottom and side portions of the concave portion of the catheter, the three-dimensional shape is easily crushed. In addition, due to the use of the lower fiber in the non-woven fabric, the degree of freedom of movement (ease of movement) When a liquid-conducting slit is formed in the formation of the concave portion of the guide f, it is difficult to provide a density gradient of the fiber in a portion other than the liquid-conducting slit of the concave portion of the catheter. In addition, in order to form a liquid-conducting slit, the degree of freedom in use of fibers (ease of mobility) is used. Low non-woven fabric' Therefore, the softness of the part that touches the skin is also poor, and the touch of the skin is not good. The front sheet of Patent Document 3 utilizes a lower degree of fiber freedom (activity ease) in the non-woven fabric. 131510.doc 200904386 When the catheter recess is formed, a liquid guiding slit is formed, so that the three-dimensional shape of the concave portion of the catheter is easily crushed and the cushioning property is also poor. The present invention provides a front sheet of an absorbent article, which is formed by forming a front portion and a plurality of liquid-conducting recesses. In the middle, the front side of the front side of the road is in contact with the skin, and the front side of the liquid-conducting recess is formed. a recessed shape, the back side protrudes toward the absorber side, and the liquid guiding recess has a peripheral wall portion and a bottom surface portion, the bottom surface portion being located closer to the absorber than the back surface of the front portion, and the thickness of the portion adjacent to the (4) bottom portion of the peripheral wall portion The thickness of the front surface portion (hereinafter referred to as "X first invention" refers to the invention p. Further, the present invention provides a method for producing a front sheet, which is to supply a raw material sheet to a male member having a plurality of convex portions, And a plurality of receiving holes having the plurality of receiving holes into which the convex portion is inserted, and the female portion is deformed by extruding the portion of the raw material sheet k into the receiving hole by the convex portion a concave-shaped, a concave-shaped deformed shape is fixed by heating to produce a front sheet of an absorbent article having a plurality of concave portions; and a non-woven fabric is used as the raw material sheet so as to be directly pressed by the top end portion of the convex portion a portion of the periphery of the portion that is not in contact with either the convex portion and the inner surface of the receiving hole is formed in an annular manner to wipe the raw material sheet into the receiving hole and insert the above-mentioned convex portion into the above-mentioned convex portion The inner surface of the receiving hole extending to the position of the tip end of the convex portion or the deeper position in the state of the receiving hole is heated, thereby heating and fixing the concave deformation (hereinafter referred to as the second invention) In addition, the present invention provides a method for producing a front sheet, which is to supply a raw material sheet composed of a fibrous material to a male member having a plurality of convex portions, 131510.doc 200904386 Between the female members of the hole, by opening: «the portion of the raw material sheet is squeezed into the receiving hole to be changed: the concave shape is fixed by heating to fix the concave deformed shape, and there are a plurality of a front sheet of the concave portion; the inner surface of the opening portion is shallow, and the inner surface of the opening portion is deeper than the inner side of the receiving hole with the opening side of the opening portion from the depth direction of the receiving hole Way The above-mentioned male member and the above-mentioned female member are heated, and the portion of the raw material sheet is partially squeezed into the receiving hole, and the f-original sheet is corresponding to the top of the front sheet. In a state in which the member is not in contact with the octagonal member, the shape of the concave deformation of the second portion of the receiving hole is fixed by heating (in the case of τ, referred to as the third invention, the present invention is additionally provided by the present invention - An absorbent article comprising a liquid-permeable front sheet, a back sheet, and an absorbent article having a length of 4 between the two sheets; the front sheet is formed of a non-woven fabric into a '4 non-woven fabric a front surface of the front side contacting the skin, and a plurality of liquid guiding recesses having a peripheral wall portion and a bottom portion and protruding toward the absorber side. When the longitudinal direction of the absorbent article is observed in the publication, the front sheet is on the front surface = the peripheral wall portion The boundary portion or the vicinity thereof has a high rigidity portion, and the height of the high rigidity is higher than that of the front portion and the peripheral portion (hereinafter referred to as the fourth invention). In addition, the present invention provides a front sheet for an absorbent article, wherein the skin contact surface for the absorbent article is composed of a non-woven fabric comprising a front side contacting the front portion of the skin, and having a peripheral wall portion and a bottom portion facing the 131510. Doc 200904386 A plurality of liquid-conducting recesses protruding from the absorber side have a rigid portion at or near the boundary portion between the front surface portion and the peripheral wall portion in a cross section along the fiber alignment direction of the nonwoven fabric, and the rigidity of the high rigidity portion It is higher than the front portion and the peripheral wall portion (hereinafter referred to as the fifth invention). [Embodiment] Hereinafter, the present invention will be described with reference to the drawings in accordance with preferred embodiments.

The front sheet (hereinafter referred to as a front sheet) of the absorbent article according to the embodiment of the present invention, as shown in FIG. 3 to FIG. 3, is formed on the non-woven fabric 2 to form a front portion 31 which is in contact with the front portion 3 of the skin. The front side is formed in a concave shape, and the back surface 42 side is formed by a plurality of liquid guiding concave portions* protruding toward the absorber side. As the nonwoven fabric 2, various nonwoven fabrics previously used for the absorbent article can be used without any particular limitation, and for example, a hot air non-woven fabric, an air laid nonwoven fabric, a water needle non-woven fabric, a needle-punched nonwoven fabric, or the like can be used. Among these, 'the best is hot air non-woven fabric. The hot air non-woven fabric is obtained by a hot air method using a hot air method to perform nonwoven processing by a fiber web formed by a carding method or an air laid method. The front surface 31 of the face 3 and the front surface of the liquid guiding recess 4 are the surface of the front sheet 1 facing the skin side of the wearer when incorporated in the absorbent article 1, the back surface 32 of the front portion 3, and the liquid guiding product. When you are facing the muscles of the wearer, join the absorbent sheet! The other side. The front side of the opposite side of the skin side (absorbent side) 13J510.doc _ 10-200904386 Fiber composed of thermoplastic polymer material. Examples of the thermoplastic polymer material* include a polycondensation hydrocarbon such as polyethylene or polyene, a poly(p-phenylene terephthalate) or the like, a polyamine or the like, and a thermoplastic resin can also be preferably used. A composite fiber such as a core sheath type or a side-by-side type composed of a combination of polymer materials. These fibers may be used alone or in combination of two or more. Ο

In addition to the hot-melt fiber, the non-woven fabric 2 may contain fibers such as pulp fibers, which are not melted (raw fibers or fibers having a high melting point and substantially no hot melt property (for example, the melting point is higher than the processing temperature by 2 generations). The above fiber). The ratio of the total constituent fiber of the non-woven fabric, the quasi-medium, and the hot-melt fiber (weight basis) is preferably 50 100 /., more preferably 8 〇 ~ 1 〇〇 %, especially preferably 1 Further, the heat-soluble fiber in the nonwoven fabric 2 is preferably hydrophilized. When the front sheet 1 is used in the absorbent article, the front surface 31 of the portion other than the liquid-conducting recess 4 contacts the wearer. The front portion 3 is a portion in which the front surface 31 is in contact with the wearer's skin. In the front sheet 1, the front portion 3 is continuously formed around the respective liquid guiding recesses 4. Further, as shown in FIGS. 1 and 2, The front portion 3 is formed in a substantially flat shape. The plurality of liquid-conducting recesses 4 of the front sheet 1 are formed so as to protrude from the front portion 3 toward the absorber side, and thus have a plurality of front faces having a plurality of independent projections protruding toward the skin side. Compared to the sheet, 'the liquid that flows along the skin can be made more quickly It is sucked into the front sheet 1. Therefore, it can effectively prevent the liquid from flowing along the skin, such as liquid leakage from the absorbent article, etc. As shown in Fig. 2, the front side 41 side of the liquid guiding recess 4 is concave. The rear surface 42 side protrudes toward the absorber side (the lower side in Fig. 2). The liquid guiding recess 4 has a peripheral wall portion 43 and a bottom surface portion 44. Further, the bottom surface portion 44 is located on the back side of the front portion 3 13110.doc 200904386 3 2 is closer to the absorber side, that is, μ ^, the thickness direction of the front sheet 1 is Ζ (refer to, ', Fig. 2U, the position of the bottom portion 44 is closer to the absorber side than the back surface μ of the front portion 3 (Fig. 2 The lower side)) The peripheral wall portion 43 is inclined with respect to a vertical line extending in the thickness direction of the front sheet i, and the cross section of the portion of the front sheet 1 surrounding the peripheral wall portion 43 (the thickness direction of the front sheet! The area of the intersection plane) from the front

The portion 3 is gradually reduced toward the bottom surface portion 44. More specifically, the inner surface shape is formed substantially in the shape of an inverted truncated cone. The bottom surface portion 44 is substantially circular when viewed in plan, and the peripheral wall portion 43 is continuously formed around the bottom surface portion 44. In the present embodiment, the bottom surface portion is formed substantially in a flat shape, and may be formed in a convex curved shape having a convex arc shape in a downward direction. In the peripheral wall portion 43 of the liquid guiding recess 4 in the present embodiment, the thickness Ta of the portion adjacent to the bottom surface portion 44 (the portion indicated by reference numeral 8 in FIG. 2, hereinafter also referred to as the bottom surface splicing portion A) is smaller than the front portion. The thickness of 3 is τ 1. Therefore, the fiber density of the non-woven fabric of the bottom surface abutting portion A is higher than the fiber density of the non-woven fabric of the front portion 3. In this manner, the difference in density (gradient) between the front portion 3 and the bottom portion adjacent portion 8 is such that the liquid in the front surface portion 3 and/or the peripheral wall portion 吸入 is likely to be adjacent to the bottom portion. The part moves eight. When the front surface portion 1 is placed on the absorbent body, the bottom surface portion A is close to or in contact with the absorbent body, and the liquid can be naturally moved from the portion to the absorbent body. In this manner, the liquid guiding recess 4 has a function of guiding the sucked liquid to the absorber at the front portion 3 and/or the peripheral wall portion 43. As described above, the thickness Ta of the adjacent portion A of the bottom surface portion of the front sheet 1 of the present embodiment is smaller than the thickness T1 of the front portion 3, and the mobility of the liquid to the absorbent body 131510, which is excellent for d〇〇-12-200904386. Further, as described above, the front sheet 1 of the present embodiment has the bottom surface portion 44 and the lower end of the liquid guiding recess 4 is not opened, so that the shape of the liquid guiding recess 4 is stable even when the absorbent article is worn. The compressive force is applied to the front sheet 1 in the thickness direction. The liquid guiding recess 4 is also less likely to be crushed, or the restoring force is excellent even when the pressure is released from the compression force. Therefore, it has a good cushioning property and a good touch.

Further, the liquid-conducting recess 4 has a bottom surface portion 44, and the liquid moved to the absorber is shielded by the s-base portion 44. For example, when used as a front sheet for sanitary napkins, it can be prevented from being used on the sanitary napkin after use. The menstrual blood is more conspicuous. The thickness Ta of the adjacent portion A of the bottom surface portion is preferably 3 to 8 % by weight of the thickness τ of the front portion 3 from the viewpoint of improving the mobility of the liquid to the movement of the absorbent body, and particularly preferably 5 to 5 % by weight. . Further, the above thickness 丨 is preferably 〇·4 to 2.5 mm, and the above thickness 3.4 is preferably 〇丨~〇 4 mm. Further, as shown in Fig. 2, the thickness T1 of the front portion 3 is measured at a substantially central portion between the adjacent liquid guiding recesses 4. Further, as shown in Fig. 2, the thickness Ta of the adjacent portion A of the bottom surface portion constitutes the thickness 43 of the portion a of the non-woven fabric of the liquid-conducting concave portion 4: two Hi? 'the peripheral wall portion of the liquid-conducting concave portion 4 in the present embodiment, Further, since the front side 邛 3 side gradually decreases toward the bottom surface portion 44 side, the fiber density of the non-woven fabric of the peripheral wall portion 43 gradually increases from the front side adjacent to the 3 Θ side. - the front side of the front side of the bottom surface portion 44. Therefore, the liquid moves from the front field to the grate and/or the peripheral wall portion 43 to the bottom portion abutting portion, and the mobility is further increased by 4 digits, and the mobility of the liquid to the absorber is further improved.优13I5J0.d〇c 200904386 In terms of improving the mobility of the liquid to the movement of the absorbent body, the thickness Ta of the peripheral portion & surface portion P adjacent portion A is preferably the adjacent front portion 3 of the peripheral wall portion 5 to 80% of the thickness Tb of the portion (the portion indicated by the symbol B. in Fig. 2, hereinafter also referred to as the front portion adjacent portion B), and more preferably, the front portion is adjacent to the portion B. The thickness is the thickness of the portion B of the non-woven fabric constituting the liquid-conducting recess 4. Further, the front sheet of the embodiment! The front portion of the liquid guiding recess 4 in the middle has a thickness TM of the adjacent portion B and a thickness η at the front portion 3. Thereby, the liquid is 3 m jg* μ aj from the front portion. earth. M3 mobile mobility is better. The mobility of the mobile body moves into a bullish competition. From the viewpoint of improving the mobility of the liquid from the front portion 3 to the peripheral wall portion 43, the plant drought degree 11 of the front portion adjacent portion B is preferably 20 to 9 % of the thickness of the front portion 3, particularly Good is 40~90%. The degree of dryness of Tl, Ta, and Tb under no load is obtained, for example, according to the photograph of the photographing surface. The thickness of the front sheet which will be described later is also the same as that of the non-woven fabric 2 of the j-face portion 44. By the presence of the bonding points of the fibers, the two liquid guiding recesses 4 can be raised, the body is transparent, and the liquid permeability of the front sheet is improved, thereby preventing the film and the bonding point m. The deterioration of the skin feels. The film of the fiber i 3 is filmed, and the embossing process is used to pressurize the cloth to open the earth, and the hot air treatment of the wind method makes it better to use (4) Hot ' '. Yiwei is a hot melter at the intersection of them. J3I5I0.doc • 14-200904386 As shown in Fig. 3, the liquid-conducting recessed portion 4 in the front sheet bundle of the present embodiment is arranged in a zigzag shape, and the front portion 3 is in the fiber alignment direction of the non-woven fabric 2 (X direction in the drawing) and The direction orthogonal to the direction (the γ direction in the drawing) is arranged in a discontinuous straight line in both directions. By placing the front portion 3 in a discontinuous straight line in the X direction or the γ direction, the number of the liquid guiding recesses 4 can be more arranged, whereby the area of the front portion 3 in contact with the skin can be reduced. Thereby, the adhesion to the skin can be suppressed, and the osmotic liquid is less likely to penetrate between the skin and the front portion 3 than in the case of continuous straightness. On the other hand, Fig. 4 is a view showing an embodiment in which the front portion 3 is continuously continuous in the fiber alignment direction of the nonwoven fabric 2 (X direction in the drawing) and the direction orthogonal thereto (the γ direction in the drawing). In Fig. 4, the front portion 3 extends in a straight line along the straight line [丫, and the front portion 3 extends continuously linearly along the straight line 匕乂. It is preferable that the front sheet 1 is such that the fiber alignment direction (the χ direction in the drawing) and the direction orthogonal thereto (the Υ direction in the drawing) coincide with the longitudinal direction of the absorbent article, and the absorption is incorporated. In the article, the thickness of the front portion 3 between the liquid guiding recesses 4 arranged on the straight line is further increased in consideration of the interval between the liquid guiding recesses 4 which are arranged on a straight line which is enlarged in the direction in which the fibers are aligned, and is made soft. More preferably, the front portion 3 is present in a discontinuous straight line in at least the longitudinal direction of the absorbent article in a state of being incorporated into the absorbent article. 3, as shown in Fig. 5, the nonwoven fabric 2 of the bottom surface portion 44 of the liquid guiding recess 4 preferably has a fiber fixing portion 45 other than the joint point of the fibers, and a fiber fixing I31510.doc 200904386 portion 45' and the bottom portion 44. The other part (4) is the outer part. The phase i fiber (r: with =: = fiber form) is densely present, and they are part of the body, preferably by the body of the spoon. Partial embossing formed by partial heating and pressurization of the non-woven fabric. The so-called pressure Jff portion here also includes a portion which is formed by embossing.

The fiber fixing portion 45 of the bottom surface portion 44 and the other portion 46 may be composed of a non-woven fabric which does not have a joint point of the fibers, and a non-woven fabric of the joint point. The fiber fixing portions 45 are inserted into each other. Further, the entire bottom surface portion may be a fiber. Since the bottom surface portion 44 has the fiber fixing portion 45, the fiber is densified and the liquid in the absorbent body is not easily found. The rigidity of the bottom portion 44 can be improved step by step, even for the front sheet! The compressive force is applied in the thickness direction, and the liquid guiding recess 4 is also less likely to be crushed. In view of obtaining a moderate liquid permeability and allowing a low-density portion and a high-density portion to exist in the bottom surface portion, the liquid is easily moved to the absorber, and particularly preferably, the fiber fixing portion 45 is partially formed on the bottom surface. On the 44th. The front sheet 1 preferably has the following configuration from the viewpoint of improving the form stability and cushioning properties of the liquid guiding recess 4 and the like. The front side of the other embodiments is also the same. The basis weight is preferably 15 to 50 g/m2', particularly preferably 20 to 40 g/m2, and the fineness of the constituent fibers is preferably from 2 to 6.7 dtex. The diameter wi of the opening portion on the side of the front portion 3 (refer to Fig. 2, the diameter of the circle of the same area when the shape of the opening is non-circular) is preferably 2 〇 7 7 mm, 131510.doc 200904386 U 44 The diameter W2 (refer to the diameter of the same circle in the case of non-circular shape in Fig. 2) is preferably 0.5 to 2.5 mm. The thickness 面 of the sheet 1 (* as shown in Fig. 2) is preferred. · 5~3. The ratio of the thickness of the portion 1 to the thickness 较好 is preferably 20 to 90%, preferably 40 to 90%. In addition, the number of the liquid guiding recesses 4 is preferably about 10 to 100, and more preferably about 20 to 70, per 9 cm 2 of the front sheet.

In the preferred manufacturing method of the front sheet 1, as shown in FIG. 6, a plurality of liquid-conducting depressions M, 4 are formed on the raw material sheet 2 of the nonwoven fabric by using a pair of rolls 5, 6. '.'··· obtained the front sheet 1. The non-woven fabric used as the raw material sheet 20 is preferably a hot air non-woven fabric. The hot air non-woven fabric has a moderate elongation (deformation freedom of the fiber structure), and since it has a bonding point of the fibers, even if it is elongated, the fiber is not disturbed, so that it is advantageous to form the sturdy liquid guiding recess 4. In the manufacturing method shown in FIG. 6, when the liquid-conducting recessed portion 4 is formed, the first roller having a plurality of convex portions 5? on the circumferential surface is used, which is also referred to as a convex roller/and a circumferential surface having a convex portion 51. The extension of the second roller 6 (hereinafter also referred to as a concave roller) of the plurality of recesses 61 corresponding thereto and the heating device. The first roller 5 and the second roller 6 in the apparatus are driven in synchronism in the direction indicated by the arrow in FIG. 6, so that the respective convex portions 5 are sequentially inserted in accordance with the rotation of the two rollers 5 and 6. The concave portion 6 is configured to be inside (with sufficient insertion). The convex portion 51 inserted into the concave portion 61 is configured to be 0 so as not to contact the inner circumferential surface of the concave portion 61. In the example shown in Fig. 6, the convex portion 51 is formed in a cylindrical shape, and the concave portion 131510.doc - 17· 200904386 61=The bottomed cylindrical shape having an inner diameter larger than the diameter of the convex portion 51. As shown in FIG. 6, when the raw material sheet 2 which consists of a cloth is not introduced between the first and second rolls 5 and 6 which are rotated, the raw material sheet 2 is as shown in FIG. When a portion other than the concave portion 61 of the second roller 6 contacts the back surface, it is conveyed to a portion which is pressed into the concave portion 61 by the convex portion 51, and at the portion where the concave portion P 61 is pressed to the convex portion 5 Pressing and squeezing into the recessed portion 6 to carry out the squeezing. When the squeezing is carried out, the portion of the raw material sheet 2 that is in contact with the tip end portion of the convex portion 51 and directly pressed is present, and the convex portion 51 and the concave portion are present. The portion 231 that is not in contact with each other, the portion η is further elongated substantially in comparison with other portions. Further, heat is supplied from the inside of the concave portion 61 to the above-mentioned portion 23 in an extended state: 'This heat is fixed by the heat (heat-fixing) to form a structurally stable liquid guiding recess 4. In this way, a front sheet formed with a plurality of liquid guiding recesses 4 can be obtained! . In the obtained front sheet 1, the crotch portion 44 is mainly composed of a portion 24 which is directly pressed by the top end of the convex portion, and the peripheral wall portion 43 is mainly manufactured by the above-mentioned portion of the front sheet of the invention 2 & The qV member is also referred to as the manufacturing method of the first embodiment. In the manufacturing method of the first embodiment, as shown in FIGS. 6 and 7, the sheet 2Gi, ,, .D is provided with a convex portion having a plurality of convex portions 5 (the male member and the There is a plurality of recesses 61 (hereinafter, also referred to as receiving (four)) inserted with the convex portion 51, and an extension of the concave roller (female member) 6 and between the two light 5 and 6 of the heating device, by the convex portion 51 by I3J510.doc 200904386 A part of the raw material sheet 20 is extruded into the receiving hole 61 to be deformed into a concave shape, and the concave deformed shape is fixed by heating to form a front sheet having a plurality of concave portions. The male member and the female member may be used to form a convex portion or a concave portion on the flat plate. However, in the present embodiment, as shown in FIG. 6, the convex portion and the circumference having a plurality of convex portions 51 on the circumferential surface are used. The receiving hole 61 and the concave roller 6 are rotated in conjunction with the convex light 5. In terms of productivity, etc., it is preferable that the male member and the female member are viewed. Further, the convex member 5 and the concave roller The interlocking rotation of 6 can be realized, for example, by a known connecting mechanism such as a gear or a key bar. f 6 is connected to the front side shown in FIG. 1 and FIG. The material 1 is formed by the upper surface of the raw material sheet 2 composed of a non-woven fabric by the upper surface of the convex sheet 5 and the concave roller 6'. The front side 3 is formed to contact the front side of the skin, and the back side 42 side is absorbed. The plurality of recesses 4, 4 projecting from the body side: the side forming recesses have a function of increasing the apparent thickness τ of the front sheet i and guiding the liquid sucked from the sides 31, 41 toward the absorber. W (No) (4), (9) (4) Public: Γ woven fabric, woven fabric, woven fabric, second-degree non-woven fabric. The hot air is not suitable for the extension of the two, and has the combination of fibers, and the fiber is difficult to become Messy, so it is easy to form: make the elongation '4. Relative to this' does not form fibers with each other:: stable: the concave portion is easy to become messy due to elongation, and it is difficult to form a stable shape

13 351〇.<J〇C -19. 200904386

The concave non-woven fabric having a low degree of freedom of movement (easiness of movement) is easily stretched. It is difficult to form the concave portion 4 having a depth, and in addition, a concave portion is formed: a crack or the like is formed, and it is difficult to form the concave portion 4 having a stable shape. D The hot air non-woven fabric is obtained by the carding method or the air-laid method, and is obtained by the hot air method or the like without the weaving: The net is preferably formed by the carding method. In addition to the single-layer hot air non-woven fabric, hot air non-woven fabric and other non-woven fabrics. In the present invention, the hot air non-woven fabrics also include hot air non-woven fabrics or laminated bodies. It is preferable that the laminate is used as a hot air non-woven fabric by a known bonding such as a ray flower embossing or the like (heat embossing, ultrasonic embossing, or high-level method is used to partially or integrally join the layers. From the viewpoint of the excellent concave portion, the constituent fiber used as the I" nonwoven fabric is preferably a heat-resistant fiber, and is particularly a fiber composed of a hot polymer material. As a thermoplastic polymer material, a polyethylene is described. 2:; = and so on: thin hydrocarbon, polyterephthalic acid thermoplastic polymer material ... can also be used well, the fiber can be used for single-handedness or side-by-side type Re-heating (four) fiber ^, unexpectedly use more than two kinds. In addition to the dazzling fiber or higher melting point 3 pulp fiber, etc. does not have heat such as melting point higher than the processing temperature 20J two: with heat ... fiber (in the fiber 'Hot fiber compared to fiber.' The total composition of non-woven fabric is 50~100%, and the better 曰/ratio (weight basis) is preferably 疋〇~100%, especially preferably 1〇〇%. 131510.doc -20- 200904386 Non-woven The hot-melt fiber is preferably hydrophilized β in the present embodiment, and as shown in Fig. 6, the strip-shaped raw material sheet is continuously supplied between the pair of rolls 5 and 6 in the direction indicated by the arrow. 2. The two rollers 5, 6 are formed in such a manner that the convex portions 51 of the convex rollers are sequentially inserted into the receiving holes 61 (with the remaining insertion) as the two rollers 5, 6 rotate. The convex portions 51 inserted into the receiving holes 6i are The convex roller 5 used in the present embodiment has a plurality of convex portions 51 which are connected in series at a fixed interval and which extend in the axial length direction of the roller. And formed, and the convex portion is formed at a fixed interval in the circumferential direction of the pro 5, and each convex portion constituting each convex portion row and each convex portion of the adjacent convex portion row are in the axial direction of the pro-axis The upper surface is formed at a position separated by a half pitch. The receiving hole of the concave roller 6 is also arranged in (four). In the example shown in FIGS. 6 to 8, the convex portion η has a substantially flat top end surface at the top end of the cylindrical shaft portion. The receiving hole 6 has a bottomed cylindrical inner surface having an inner diameter larger than the diameter of the convex portion 51. When the raw material sheet 20 composed of the non-woven V; cloth is introduced between the two reports 5 and 6 of the interlocking rotation, the raw material sheet 20 is a portion other than the receiving hole 61 of the concave roller 6 as shown in FIG. In a state in which the back surface is contacted, it is conveyed to a portion which is pressed into the receiving hole 61 by the convex portion 51, and a portion of the receiving portion which is located on the receiving hole 61 is pressed by the convex portion 51 and is pushed into the receiving hole. 61. The squeezing of the raw material sheet 2 is carried out in the following manner: around the portion 24 which is in contact with the convex end portion and directly pressed, and the convex portion" and the inner faces 61a, 61b of the receiving hole 61 The portion of the material that is not in contact with each other will form a ring shape. When the extrusion is carried out, the raw material sheet is partially bent to the middle of the layer 131510.doc • 21 · 200904386 ~ and the material sheet is partially elongated The portion that is squeezed into the receiving hole 61 is deformed into a concave shape. The convex portion 51 and the receiving hole 61 are respectively heated from the inner surface 61a, 61b of the receiving hole 61 by the "mouth heating state or the like" in the group male member and the female member, and the (4) in the sheet 20 is squeezed into the receiving hole 61. And the concave portion is provided with heat to fix the concave deformed shape (heat-fixing). The receiving hole 61 of the female member is concave, so that it is difficult to radiate heat, and the temperature is higher than the receiving hole 61. The flat portion of the female member. Therefore, although the raw material sheet 2 in the guide A receiving hole 61 is thermally solidified, the flat portion of the female member is not easy to be..., and further, since the bottom surface of the receiving hole 6 j is closed, the closer to the bottom surface is formed In the state where the temperature is higher, the closer to the convex portion 51 of the male member, the easier it is to be thermally solidified. In addition, as a better manufacturing method, only the surface layer of the flat portion of the female member is thermally resistively coated, and the female member is better controlled. Since the front surface temperature is such that it is difficult to stably heat the region corresponding to the flat portion of the female member of the raw material sheet 2, the heat-resistant coating material may be exemplified by epoxy resin or bakelite in which glass fibers are incorporated. Bakelite), polyether ether ketone Materials, ceramic materials, neodymium resin, Teflon (registered trademark) resin, etc.

In addition to the above effects, in order to further improve the moldability and flexibility (frontal touch), it is preferable that the inner surface temperature of the receiving hole 61 is higher than the temperature of the convex portion 51. ~4〇t or so. Further, it is preferable that the inner surface temperature of the receiving hole 61 is about 8 〇 to 丨6 (about 2 cm), and the melting point of the hot-melt fiber contained in the non-woven fabric (in the case of the composite fiber, the melting point of the component having a lower melting point) ) is set to At:, more preferably A-50 ° C 131510.doc -22- 200904386 or more, A + 40 ° C or less. When the raw material sheet 20 is extruded into the receiving hole 61 and the extruded portion When the heating is performed, if the portion 23' which does not contact any of the convex portions 51 and the inner faces 61a, 6 of the receiving holes 61 is generated, the portion 23 can be greatly reduced in mechanical strength due to elongation. In the case of a crack or the like, the film is stretched abruptly. In addition, the state is stably fixed (thermoset). According to the present embodiment, the front sheet 1 having the concave portion 4 can be easily manufactured in this manner. Since the recessed portion 4 maintains the mechanical strength of the peripheral wall portion 43 and does not form the opening portion, and does not have a slit or the like, the concave portion 4 is not easily pressed when the surface sheet 1 is subjected to a compressive force in the thickness direction when the absorbent article is worn. Bad, or even if it is crushed, the self-compression force is liberated The shape is also excellent in resilience. This has good cushioning properties and good touch. In addition, the recess 4 has a bottom portion 44, and the lower end does not open, and the liquid moved to the absorber is shielded by the bottom portion 44. For example, when used as a front sheet for sanitary napkins, it can prevent the menstrual blood on the sanitary napkin after use from being relatively conspicuous. It is preferable to form a ring shape around the entire inner surface of the receiving hole 61. The portion 23 which is not in contact with any of the convex portion 51 and the inner faces 6u, 6ib of the receiving hole 61 is formed in a ring shape around the entire circumference of the portion directly pressed by the tip end portion of the convex portion. The male member side of the raw material sheet 20 is not directly in contact with the raw material sheet 20 at the flat portion of the male member (the portion other than the convex portion 51 facing the female member), but there is moderate heat, so there is a fluffy recovery. The fiber density drops 131510.doc -23- 200904386. The other side, the side of the female component of the raw material sheet 2 is directly in contact with the flat portion of the female member, so that it is easier to form the fiber than the male member side. When the raw material sheet 20 is squeezed into the receiving hole 61, the above-mentioned portion 23' which is not in contact with any of the inner surfaces 61a, 61b of the convex portion and the receiving hole is formed as shown in Fig. Preferably, the shortest distance L1 between the convex portion 51 and the opening edge portion of the receiving hole 61 in a state where the convex portion 51 is inserted into the receiving hole 61 is in a relationship with the thickness of the raw material sheet 2Q. For example, when the non-woven fabric having a thickness of less than 3 mm is used as the raw material sheet, the above-mentioned shortest distance _ is preferably q 7 or more, more preferably 0.7 to 3.0 _, and further The good is 1 () with the above. In addition, in terms of the concave portion 4 which is not easily crushed and has a restoring force of a three-dimensional shape, the opening of the convex portion 51 and the receiving hole 61 in a state where the convex portion 51 is inserted into the receiving hole 61 is sleeved. + p 仏 仏 n The longest distance between the edges 62. Better

4. 〇mm or less, particularly preferably 3〇mm or less. Further, in terms of maintaining the thickness of the front portion 3, the distance between the face 63 of the female member 6 around the receiving hole 61 and the opposing face of the upper male member 5 in the state in which the convex portion is inserted into the receiving hole 61 is separated. L3 is preferably i _ or more 'particularly more than 3 mm. Further, it is particularly preferable that the convex portion 51 in the state in which the bottom surface portion 44 is broken is 1.0 to 4.0. Further, in order to obtain the more three-dimensional concave portion 4, the insertion depth L4 of the convex portion 51 is preferably inserted into the receiving hole 61. 〇5~6.〇 claw, mm ° 131510.doc 24-200904386 The insertion depth L4 of the convex portion 5 1 gradually changes with the rotation of the convex roller 5 and the concave roller 6, but the convexity of the predetermined size is equal. The state in which the portion 51 is inserted into the receiving hole 61 is a state in which the insertion depth L4 is maximized.

As shown in the present embodiment, when the convex roller 5 and the concave roller 6 are used as the male member and the female member, as shown in Fig. 8(c), the opening shape of the receiving hole 61 is preferably the circumference of the concave roller 6. The length LY of the direction is longer than the length LX' of the axial direction of the concave roller 6. For example, it is preferable that the ratio (LY, /LX,) of the length LY' in the circumferential direction to the length LX in the axial length direction is 1.2/1 to 6/1. In the present embodiment, as shown in FIG. 8, the inner faces 61a and 61b of the receiving hole 61 extending to a position deeper than the tip end position p丨 of the convex portion in the state in which the convex portion 5 is inserted into the receiving hole 61 are performed. This deformation shape in which the portion of the raw material sheet 20 is deformed into a concave shape by heating is fixed by heating.

That is, even when the convex roller 5 and the concave roller 6 rotate and the insertion depth W of the convex portion 51 reaches the maximum, the inner surfaces 61a, 61b of the receiving hole 61 exist at positions deeper than the distal end position P1 of the convex portion 51. Thereby, the stable recess 4 can be formed on the non-woven fabric which is squeezed by the convex portion 51 by the heat from the periphery of the receiving hole 61 and the heat from the convex portion W. The receiving hole 61 of the female female member 6 used in the present embodiment has a peripheral surface 61a and a bottom portion 61b, but as shown in Fig.

() and the receiving hole 61 of the 'female member 6' shown in Fig. 9(b) may be a blade having a circumferential surface portion 6U and may have no bottom portion 61b. In the case where the bottom portion 01b is not provided, for example, Q9(b) does not have the top end position of the convex portion 51. 131510.doc •25·200904386 The position of the lower end of the inner surface 61a of the receiving hole 61 may be the same as that of the lower end of the receiving hole 61. In the case of the bottom portion 61b, as shown in Fig. 9(a), the inner surface 6ia of the receiving hole 61 is heated to a position deeper than the top end position ρ of the convex portion 51, and the top end portion of the convex portion 51 is raised. It is better in terms of fixation. When the bottom surface of the convex portion having the bottom surface is more likely to be formed with a nearly uniform thickness as compared with the case having the bottom surface, it is easy to obtain a shape in which the thickness of the flat portion at the tip end gradually becomes thicker when the bottom surface is not formed. The height D (see FIGS. 8 and 9(a))) of the inner surface 6u of the receiving hole 61 located below the tip end position P1 of the convex portion 51 is 〇mm or more, preferably more than 〇mm, 20 mm or less. It is 5 to 10 mm. In the present embodiment, as shown in Fig. 7, the portion 24 of the raw material sheet 2 which is directly pressed by the tip end portion of the convex portion 51 does not contact the inner surface 61b of the receiving hole 61. Thereby, the cutting or hardening of the raw material sheet due to the intrusion or heating of the portion 24 can be prevented, and the good liquid permeability of the front sheet can be ensured and the deterioration of the touch of the skin can be prevented. The projections 51 of the first embodiment have a large portion 53 contacting the raw material sheet and a non-protruding portion 54 not contacting the raw material sheet 2 at the respective tip portions. The convex portion 51 shown in Fig. 10 (4) has a lattice-like projecting portion 53, and the convex portion 51 shown at the beginning has a cross-shaped projecting portion 53. By using such a convex portion 51, the resistance when the convex portion 51 that is pushed in is extracted can be reduced, so that the shape of the concave portion 4 can be molded without being broken. Further, it is preferable that the step between the protruding portion 53 and the non-protruding portion 54 becomes, for example, 0.05 to 1.0 mm. According to the method of the first embodiment, the above-mentioned front sheet i which is not shown in Fig. 2 and Fig. 2 131510.doc • 26-200904386 can be efficiently produced. The bottom surface portion 44 of the front sheet i is a portion that is directly pressed to the tip end portion of the convex portion 51 when it is manufactured. The bottom surface portion 44 of the front sheet 1 shown in Fig. 1 and Fig. 2 is formed substantially in a flat shape. However, the distal end portion of the convex portion 51 may be formed in a convex curved shape, and the bottom surface portion 44 may be formed such that the cross section faces downward. Arc-shaped convex surface shape. The non-woven fabric used as the raw material sheet 20 preferably has the following constitution from the viewpoint of improving the stability of the three-dimensional shape of the concave portion 4 and the cushioning property. The basis weight is preferably 15 to 50 g/m2, particularly preferably 20 to 40 g/m2. The fineness of the fiber is preferably 1.2 to 6.7 dtex. The thickness is preferably 0.2 to 3 〇 mm, and particularly preferably 〇 4 to 2 5 claws. The thickness was given to the thickness of the raw material sheet before the uneven shape, and the thickness under the load of 〇 5 g/cm 2 was measured using a laser displacement gauge (LK-〇85) manufactured by KEYENCE. . In addition, the diameter of the opening of the receiving hole 61 of the female member (the diameter of the circle of the same area when the shape of the opening is non-circular) is preferably 2 〇 ~ 'Ο convex 卩 5 1 straight hollow ( The diameter of the circle of the same area is preferably 0.5 to 2.5 mm in the case of the non-circular shape, and is preferably one of the manufacturing methods of the front sheet of the invention. (Hereinafter, it is also a manufacturing method of the second embodiment). The manufacturing method of the second embodiment is described in the same manner as the manufacturing method of the second embodiment, and the description of the same aspects will be omitted. Regarding aspects that are not particularly described, it can be made the same as in the i-th embodiment. A method for producing a front sheet according to a second embodiment of the present invention is as shown in Fig. 11 of Fig. 11510.doc -27-200904386, which is a method of supplying a convex material (a male member) of a plurality of convex portions 51 from a fibrous material. 5 and a portion of the material moon 20 having a concave roller (female member) 6 having an inserting surface of the sheet having a receiving surface 61 of the slab 51 is pushed into the receiving hole 61. The meat stalk is inserted into the receiving hole 61 by the convex portion 51. The deformation into concave heat causes the concave deformed shape to be fixed by the sheet ia. "In the second embodiment, the front surface having a plurality of concave portions is used as the male member and the member in the present invention. As shown in Fig. U, the convex light 5 having a plurality of convex portions 51 on the circumferential surface and the circumferential surface are used. Fig. 12 and Fig. 13 show a view of an example of the front sheet 1A. The Fig. 1A is formed as follows: Fig. j is composed of non-woven fabric The raw material sheet 2 is produced by the method of the second embodiment, and the convex roller 5 and the concave roller 6 shown in the front sheet 1 shown in Fig. 13 are in contact with the front portion 3 of the skin on the side of the front surface 31. And a concave surface is formed on the front surface 41 side, and a plurality of concave portions 4, 4 which protrude toward the side of the absorber 42 from the side of the lunar surface 42 are taken. In Fig. 12, the front side sheet 1A is manufactured in the X direction. When the raw material sheet and the front sheet 1A are longitudinally _), the Y direction is perpendicular to the longitudinal direction (CD). The concave member used in the present embodiment is shown in Fig. 14. The receiving hole 61 has an inverted truncated cone-shaped inner surface 162, 163 which is sized to be inserted into the convex portion 51 at the center portion. The inner surface of the mouth portion forms a slanted face The depth direction of the depth of ζ ζ 另外 另外 另外 ' ' ' ' ' ' ' ' 61 61 61 61 61 61 61 61 61 61 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 The side (upper side in Fig. 14) is inclined away from the center line CL6 of the receiving hole. The inclined surface 63a in the present embodiment has a sectional shape parallel to the depth direction Z' of the receiving hole 61 as shown in Fig. 14. The insertion depth L14 (see FIG. 14) with respect to the convex portion 51, the length L63a of the inclined surface 63 & (measured along the inclined surface, see FIG. 14) is preferably 10 to 350 ° /. Preferably, the convex portion 51 of the convex roller (male member) 5 used in the present embodiment has an inclined surface 52 on the side of the base end 5丨b in the direction in which it is large. The inclined surface 52 is inclined so as to gradually move away from the center line CL5 of the convex portion 51 from the distal end side of the protruding direction of the convex portion 51 toward the proximal end side. The inclined surface 52 in the present embodiment is as shown in the figure. As shown in Fig. 14, the cross-sectional shape of the plane parallel to the convex direction of the convex portion is an arc shape. The length L52 of the length inclined surface 52 of the line CL5 from the top end to the base end (measured along the inclined surface, see Fig. 14) is preferably 2 to 160 ° /., more preferably 8 to 12 % As shown in the present embodiment, the inclined surface in the present invention also includes a circular arc shape. Further, the center line CL5 of the convex portion 51 is a straight line parallel to the protruding direction of the convex portion 51, and is attached thereto. a straight line passing through a substantially central portion of the convex portion in the cross section of the protruding direction. The center line CM of the receiving hole 61 is a straight line parallel to the depth direction of the receiving hole 61 and is received in a cross section orthogonal to the depth direction A straight line at the approximate center of the hole 6. In addition, the receiving hole 61 of the concave roller 6 and the convex portion 51' of the convex roller 5 used in the embodiment are inserted into the receiving hole 61 (refer to FIG. 14) 131510.doc -29· 200904386 The width W (see FIG. 14) of the gap 7 between the inclined surface 52 of the convex portion 51 and the inclined surface 63a of the receiving hole 61 is away from the convex portion 51 and the center line CL 5 of the receiving hole 61. , CL 6 and gradually expanded. More specifically, the inclined surface 52 of the convex portion 51 and the inclined surface 63a of the receiving hole 61 in the present embodiment are both arcuate in cross section, and the radius of curvature of the inclined surface 52 is larger than the radius of curvature of the inclined surface 63a. The ratio of the radius of curvature of the inclined surface 63a of the receiving hole 61 to the radius of curvature of the inclined surface 52 of the convex portion 51 (the former/the latter) is preferably 0.1/1 to 0.9/1, more preferably 0.2/1. 0.8/1. In addition, with respect to the insertion depth L14 of the convex portion 51, the radius of curvature of the inclined surface 63& of the receiving hole 61 is preferably 8 to 150%, with respect to the center line CL5 of the convex portion 51 from the top end 5 1 a to the base The length of the end 5 1 b, the radius of curvature of the inclined surface 52 of the convex portion is preferably 5 to 75%.

In this embodiment, the inclined surface 52 of the convex portion 51 and the inclined surface 63a of the receiving hole 61 are continuously formed in the circumferential direction of the convex portion 51 or the receiving hole 61, and the center line CL5 of each of the self convex portion and the receiving hole 61 is formed. It is observed in the direction of cl6 and formed into a ring shape. Therefore, the n A_ n A line cross section of the figure shown in FIG. 14 is substantially the same as the mA-m a line cross section (not shown) of the figure η (not shown), and the difference is that it is shown in FIG. In the section +, the portions other than the convex portions of the outer peripheral surface of the convex light 5 and the portions other than the concave portion on the outer circumference of the concave roller 6 are shown as linear, and the above-mentioned "four images" (not shown) In the line cross section, the two portions 153, 164 are shown in an arc shape. As shown in Fig. U, the two parents 5, 仏 == sheet 2 having such a configuration and rotating together. . The raw material sheet 2 is introduced. At the time, the convex portion" and the receiving J fine are heated by a known heater incorporated in the convex roller 5 and the concave roller 6, etc., and heat is applied to 131510.doc -30-200904386. Further, as shown in Fig. 15, the raw material sheet 2G is used as follows. The portion of the raw material sheet 20 corresponding to the top portion 3A of the front sheet 1A is called a portion of the top portion 3 A in a state in which a portion of the raw material sheet 20 is extruded into the receiving hole by the convex portion 51. The contact roller 5 (male member) is not touched. The top sheet 3A is located closest to the skin side of the portion between the recesses 4 and 4 of the front sheet 1A (opposite to the direction in which the concave portion protrudes) The raw material sheet 2 导入 between the two rolls 5 and 6 is introduced into the receiving hole 61 by the rotation of the two rolls 5 and 6 into the receiving hole 61 by the convex portion 51 (the convex portion (four)). The portion is conveyed at the squeezing portion on the receiving hole ο. The squeegee is pressed into the receiving hole 6 爻 by the pressing of the convex portion 51 and the self-protrusion 51 and the receiving hole 61 The inner faces 162, 163 provide heat to the portion of the raw material sheet 20 which is extruded into the receiving hole 61 and deformed into a concave shape, so that the concave shape In the method of the present embodiment, as described above, the inclined surface 63a is formed by the inner surface of the receiving hole 01 near the opening, so that the raw material sheet 2 is pushed into the receiving hole 61, or When the portion to be extruded is heated, it is possible to prevent the excessive application of excessive pressure or excessive heat to the raw material sheet, and it is possible to prevent a local high rigidity portion or the like from being generated in the vicinity of the front portion of the front portion 3 or the concave portion 卩4. Further, in a state where the portion 22 of the raw material sheet 20 corresponding to the top portion 3 of the front sheet 1 is not in contact with the male member 5, the raw sheet 20 is pressed into the concave shape of the file in the receiving hole 61. The shape of the deformed shape is fixed (heat-set), so that the part of the front sheet that is in contact with the skin is prevented from being hardened by heat. Therefore, the skin of the front sheet 1A obtained is good in touch. The muscle is obtained 131510.doc -31 - 200904386 From the viewpoint of the front sheet 1A which is more excellent in the touch of the skin, it is preferable that the portion of the raw material sheet 20 corresponding to the front sheet 3 of the front sheet (which is part of the front portion 3) is substantially the entire portion. The area does not touch the convex pro 5 (the male member Since the concave portion 61 has the inclined surface 63a, it is possible to supply heat to a portion of the raw material sheet (9) which is pushed into the receiving hole 61 over a large area. Therefore, it is possible to prevent damage to the liquid diffusion caused by the capillary phenomenon of the raw material sheet 20. It is possible to form the concave portion 4 which is excellent in the recovery of the form. It is preferable to use the convex portion 51 to fill the 2G crowd, preferably as shown in Fig. 15, in the following manner: at the tip end portion 51a of the convex portion 51 The portion around the portion 24 that is directly pressed by contact forms a portion Μ which is not in contact with any of the inner faces 162, 163 of the convex portion and the receiving hole 61. The fiber degree of freedom such as (4) wind non-woven fabric is used. When the raw material sheet having a high productivity (H) is formed, the raw material sheet can be greatly elongated by forming the portion 23' centering on the portion 23. Further, by providing heat to the thus elongated portion from the inclined surface 63a of the receiving hole 61, in particular, a large amount of heat is supplied to the back side of the nonwoven fabric, and a front sheet which is more excellent in cushioning property and skin feel can be obtained. In view of obtaining a front sheet which is more excellent in cushioning properties and skin feel, it is preferred that the portion 23 is formed in a ring shape around the portion 24. The preferred heating temperature of the inner surface of the receiving hole 61 is the same as that of the third embodiment. Further, it is preferable that the heating temperature of the convex portion 51 is 6 〇 14 14 。. 〇 , , , , , , , 〇 〇 〇 〇 〇 〇 〇 〇 〇 〇 〇 〇 〇 〇 〇 〇 〇 〇 〇 〇 〇 〇 热 热 热 热 热 热 热 热 热 热 热 热 热 热 热 热 热 热 热 热A+3〇t below. Further, it is preferred that the heating temperature of the portion of the convex portion of the convex roller 131510.doc -32 - 200904386 is 60 to 140. ^ u or so, if the non-woven fabric will be right ~ hot fiber fiber melting point (pain into the π point (in the case of doubling fiber is the melting point of the dazzling) set to At, then better 曰 Δ % According to the present embodiment, the front sheet 1A having the recessed portion 4 is manufactured in this manner. As described above, the front sheet 1A is obtained. The cushioning property and the skin contacting the skin are good to the touch. In addition, the concave portion 4 has a bottom portion 44 and the lower end portion is not open, and the liquid that has moved to the absorbent body is shielded by the bottom surface portion 44. When used as a front sheet for physiological use of cotton, it can prevent rusting, and the sputum is more conspicuous on the sanitary napkin after use. In order to make the raw sheet 20 and the front sheet 1A The top portion does not contact the convex light (male member) 5 from the corresponding portion 22, as shown in Fig. 14, it is fortunate that the female member 6 in the state in which the convex portion passes into the receiving hole 61 is located at the receiving hole 61. The distance between the face 164 of the 61 faces and the face 153 of the male member 5 (the face opposite to the face 164) L13 is set to a specific value or more in relation to the thickness of the raw material sheet 2Q. For example, when a non-woven fabric having a thickness of less than 3 mm is used as the raw material sheet 2, the above-described separation distance L13 is preferably 3 or more, particularly preferably 5 mm or more. Further, when the raw material sheet 20 is squeezed into the receiving hole 6丨, in order to form the convex portion 51 and the inner faces 162, 163 of the receiving hole 61, The portion 23 that is not in contact with each other is preferably between the convex portion 51 and the inner peripheral surface 163 of the receiving hole 6丨 in a state where the convex portion 51 is inserted into the receiving hole 61 as shown in FIG. The shortest distance L11 of .doc -33-200904386 is set to a specific value or more in relation to the thickness of the raw material sheet 20. For example, when the non-woven fabric having a thickness of less than 3 mm is used as a raw material sheet, the shortest of the above is described. The distance Lu (refer to the figure (4) is preferably 0.7 mm or more, and the more popular county q... better 疋0·7~3 mm, and more preferably 1 _ or more. In addition, it is not easy to be crushed and has a solid shape. The convex portion 51 is inserted into the receiving hole 6 in terms of the shape of the restoring recess 4 The longest distance U2 between the convex portion 51 in the state of 1 and the inner circumferential surface 163 of the receiving hole 61 [refer to Figs. 16 (4) and 16 (8)] is preferably 4_ down, and particularly preferably 3 is as follows. In order to obtain a more three-dimensional recess and prevent the bottom portion 44 from being broken, the insertion of the convex portion 状态 in the state in which the convex portion 51 is inserted into the receiving hole 61 is better than the insertion of the ice L14 by 〇0.5. ~6.0 mm, particularly good is ι 〇~4〇mm ° The insertion depth of the convex part is called with the convexity 5 and the gradation, and the specified size is equal to the "convex (4) 疋 turn and the convex M1 is inserted. The receiving hole 61 is such that the insertion depth L4 is maximized. In the method of applying the form, as shown in FIG. 1: (4), the cross-sectional shapes of the opening and the :: 51 of the receiving hole 61 are all circular, but the _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ As shown in Fig. 16(b), the opening shape of the receiving hole 6! is LY, and the length of the long axis in the longitudinal direction of the ton 6 is the shape of the m-circle # e . For example, in the present embodiment, as shown in FIG. 14 and FIG. 15, the length of the 疋 阊 阊 阊 以 LY LY LY LY LY LY LY LY LY LY LY LY LY LY LY LY LY LY LY LY LY LY LY LY LY LY LY The inner faces 162, 163 of the receiving holes 61 extending to a position deeper than the tip end position ρ of the convex portion in the state of being inserted into the receiving hole 61 are heated, whereby the raw material sheet 20 is pushed into the receiving hole 61 by heating. The deformed shape of the portion that is internally deformed into a concave shape is fixed. As shown in Fig. 14, the receiving hole 61 of the female member 6 used in the above embodiment has a peripheral surface portion 163 and a bottom portion 162, and the receiving hole 61 of the female member 6 can also be as shown in Figs. 17(a) and 17(b). The circumferential surface portion 163 is provided without the bottom portion 162 °. Referring to Fig. 12 and Fig. 13, the front surface sheet which is an example of the front sheet obtained by the manufacturing method of the second embodiment will be further described. As shown in Fig. 13, the front surface 41 side of the recessed portion 4 is formed in a concave shape, and the back surface 42 side is protruded toward the absorber side (the lower side in Fig. 13). Further, the recessed portion 4 has a peripheral wall portion 43 and a bottom surface. The bottom portion 44 is a portion that is directly pressed by the distal end portion of the convex portion 51. The bottom portion 44 is formed substantially in a flat shape, and the tip portion of the convex portion 51 can be formed into a convex portion. In the curved shape, the bottom surface portion is formed into a convex curved shape having a convex arc shape in a downward direction. In the above embodiment, both the receiving hole 6丨 and the convex portion 5丨 have inclined surfaces 63a and 52, as shown in FIG. It is also possible that the receiving hole 61 only has an inclined surface 63a. The nanopore 61 and the convex portion 5 are as shown in Fig. 19, and the inclined surface 63a of the receiving hole 61 and/or the inclined surface 52 of the convex portion 51 may have an inclined surface having a linear cross section. Further, as shown in Fig. 20, The inclined surface 63a of the receiving hole 61 and/or the inclined surface 52 of the convex portion 51 131510.doc -35-200904386 may have a plurality of segments and are inclined as a whole. In addition, as shown in FIG. 21, the convex portion may also be used. The top end portion of the 51 and the bottom portion of the receiving hole 61 pressurize the portion 24 of the raw material sheet 2 that is directly pressed by the tip end portion of the core portion 51. At this time, the bottom surface portion 44 of the front sheet! The pressure between the top end portion of the portion and the bottom portion of the receiving hole is pressurized, whereby the rigidity of the bottom portion (bottom portion) 44 of the concave portion 4 can be increased, and even if a compressive force is applied to the front sheet member in the thickness direction, Further, as in the above-described embodiment, the convex roller and the concave roller are used as the male member and the female member. When the raw material is introduced into the raw material for processing, the receiving hole of the concave roller is preferably used. It is an inclined surface as described above at least in front and rear of the circumferential direction of the roller. The front sheet is used as a front sheet of an absorbent article. The absorbent article is mainly used for absorbing and excreting body fluids such as urine or menstrual blood. The absorbent articles include, for example, disposable diapers, sanitary tampon, incontinence pads, etc., but The invention is not limited to these, and includes an article for absorbing liquid discharged from a human body. The absorbent article generally includes a front sheet, a back sheet, and a liquid retaining absorbent member interposed between the sheets. As the absorber and the back sheet, a material which is generally used in the technical field can be used without particular limitation. For example, as the absorber, a cut-off assembly or a fiber assembly which is composed of a fiber material such as pulp fibers can be used. An absorbent body obtained by coating a coated sheet such as toilet paper or non-woven fabric with an absorbent polymer. As the back sheet, a film of a thermoplastic resin or a liquid impervious or hydrophobic sheet such as a laminate of the film and the crepe may be used. Back sheet i3I510.doc -36- 200904386 π has water vapor permeability. The absorbent article may further comprise various members that satisfy the specific use of the absorbent article. Such components are well known to the industry. For example, when the absorbent article is used in a disposable diaper or a sanitary napkin, it may be disposed on the left and right sides of the front sheet, or two or more pairs of three-dimensional guards. Referring to Fig. 22, an embodiment of the absorbent article of the present invention will be described. r The sanitary napkin 10 (hereinafter, also referred to as "physical sanitary napkin 10") according to an embodiment of the present invention includes a liquid-permeable front sheet 1B and a back sheet 1 as shown in Fig. 22! And the absorber 12 between the two sheets 1B and 丨i, and the solid shell is formed into a vertically long shape. The front sheet a and the back sheet are joined to each other on the outer side of the edge of the absorbent body 12. The sanitary napkin 10 is provided with a pair of side flap portions 13 and 13 on the left and right sides of the excretory portion facing portion CA which is disposed opposite to the liquid excretion portion of the wearer when worn. As shown in Fig. 22, the sanitary napkin 1 is worn in its longitudinal direction.

乂) The cross-sectional shape forms a concave shape to form a curved state. In the front sheet IB, "the direction in which the absorbent article is bent when worn" is the length direction AX of the sanitary napkin 1A, and the direction orthogonal to the bending direction is the width direction AY of the sanitary napkin. The front sheet for use in a sanitary napkin 丨B is an embodiment of the absorbent sheet for absorbent article of the present invention, as shown in Figs. 23 to 25, which is composed of a non-woven fabric and is used for the nonwoven fabric. The front surface 31 on which the front surface 31 side is in contact with the skin is formed, and the plurality of liquid guiding recesses 4 and 4 having the peripheral wall portion 43 and the bottom material and protruding toward the absorber side (the lower side in the figure) are formed. 13I5I0.doc •37- 200904386 The liquid guiding recess 4 is as shown in Fig. 24, and the front surface 4] is convex. It is concave, and the back side 42 side is the same as the above-mentioned punctual point for the front sheet IB. For the same aspect, the sheet 1 in the drawing is different or different. The part which is not specifically described can be singular and omits the same composition of the material 1A. 〃 The front sheet 1 or the front sheet is used as the non-woven fabric 2, and the 4th sac can be mourned. The H 4 is used in a particularly limited manner for absorption. The front sheet of the sexual mouth is the team of the king. The fabric is, for example, hot air non-woven fabric, rolled into a net non-woven fabric, water needle ', t woven fabrics, needle-punched non-woven fabrics, etc. It is preferred that the hot air is not woven. The front sheet 1B is incorporated into the absorbent τ, and the smear of the smear σο〒, the front side 31 of the front portion 3 contacts the muscle of the wearer ^ ^ ^ two fronts. The side of the 31st side is in contact with the skin of the wearer. The front part 3 of the front sheet 1 is used as a raw material sheet, and the non-woven fabric which is used as the raw material sheet is formed in a substantially planar shape after the concave-convex processing is formed to form the liquid-conducting concave portion 4. Continuously formed around each of the liquid-conducting recesses*. Fig. 23 and Fig. 24) The front sheet (7) is cross-sectionally observed in the longitudinal direction of the tampon [see Fig. 24 (4)], and is in contact with the front portion 3 of the skin. The circumference of the liquid guiding recess 4 is carried out on the 41st 丄 λ λ Π ^ Ρ 43 The boundary portion has a high rigidity portion 45. Further, the body 5' south rigid portion 45 is formed at the opening edge portion of the liquid guiding recess portion 4: two high rigidity portions 45 are formed with respect to one liquid guiding recess portion 4, and It is equal to the length direction of the physiological cotton 1〇 before and after the liquid guiding recess 4. The lengthwise direction section of the Ho-cotton cotton [see Fig. 24 (4)], each high rigidity part 131510.doc -38- 200904386 45 The rigidity is higher than the front portion 3 of the skin contact. The rigidity of the front surface refers to the rigidity of the central portion 3A of the front portion 3 or the adjacent portions of the high rigidity portion 45 in the longitudinal direction i of the sanitary napkin. The rigidity of the adjacent portion on the central portion 3A side is as shown in Fig. 24 (4), and the central portion 3 A of the front center is located substantially at the center between the adjacent liquid guiding recesses 4. Further, the longitudinal section of the sanitary napkin is referred to [see In Fig. 24(a)], the rigidity of each of the high rigidity portions 45 is higher than the peripheral wall portion 43 of the liquid guiding recess 4. In the case, the rigidity of the peripheral wall portion 43 is in the longitudinal direction of the sanitary napkin, adjacent to the high rigidity. Adjacent to the bottom 44 side of the two portions of the portion 45 Further, the high-rigidity portions 45 and 45 are formed to be separated from each other in the circumferential direction of the opening portion of the liquid-conducting recessed portion 4, and the rigidity of each of the high-rigidity portions 45 is higher than that of the front portion 3 contacting the skin and the guide. The peripheral wall portion 43 of the liquid recessed portion is formed in a substantially linear shape when the front sheet is viewed in plan. Further, the term "rigidity" as used in the present invention means that the fiber is fixed in a state of further aggregation. The density is lower than the difference between the two parts of the two parts, for example, by the difference in the thickness of the two parts of the contrast measured according to the micrograph of the photographing section, that is, the difference in density. The non-woven fabric of the front sheet may also have a shape that does not have a fiber shape in the high-rigidity portion, and thus is not a fiber density but a density. Further, the rigidity of the high rigidity portion 45 of the front sheet 本 of the present embodiment is higher than the portions 46 and 46 adjacent to the high rigidity portion 45 in the circumferential direction of the liquid guiding recess 4 (see Fig. 23). 131510.doc •39· 200904386 The front sheet 1B used in the present embodiment is formed with the high rigidity portions 45 and 45 in the vicinity of the opening of the liquid guiding recess 4, whereby when the physiological cotton 10 is worn, The sanitary napkin 1 is formed into a curved shape as shown in Fig. 22, and even if the front sheet 1B is also bent, the front sheet 1B does not wrinkle. That is, in the case where the high rigidity portion 45 is not present, the amount of deformation of the front sheet is larger than the amount of deformation of the absorber caused by the bending, whereby strain is generated and irregular wrinkles are generated, so the wrinkles are In the case where the surface sheet 丨B is placed on the high-rigidity portion 45 of the above-described configuration, the high-rigidity portion 45 is made possible. The shaft is deformed by the bending of the shaft, and the central portion of the front portion 3 is prevented from being deformed. Therefore, the liquid flow caused by the irregular entrapment and the deterioration of the skin feel can be reduced. Further, the right rigid portion 45 is distributed in the circumferential direction of the liquid guiding recess 4 In the case where the region is formed into a ring shape, the touch of the skin is lowered and the liquid is accumulated in the high-rigidity portion where the density is high, which prevents the liquid from moving to the absorber. In this respect, it is preferable that at least a part of the high-rigidity portion is present. Not continuous. The high-rigidity portion 45 is preferably in the thickness direction z of the front sheet 1B, in the range from the height position of the front portion 31 to the back surface = position in the central portion 3A of the portion 30 (the thickness in L23 in Fig. 24 (4) In addition, it is possible to suppress the generation of the sensitive groove, and to maintain a good high-rigidity portion, in terms of the presence of the skin, the skin feel, and the non-woven deformation of the | π at threshold J r portion 45 The process of forming a film into a film and forming a non-woven fabric occurs. The reason for this is that the thickness of the sheet is 131510.doc •40·200904386, which is thin and easily broken, and if the film-like portion is present on the high-rigidity portion 45 in a dispersed manner, the high-rigidity portion can be obtained. 45 is more stable.

Further, in the sanitary napkin 1 of the present embodiment, as shown in Fig. 25, the liquid guiding recess 4 is arranged in a zigzag manner on the front sheet (7). Further, a plurality of high-rigidity portions 45, 45, ..., a plurality of high-rigidity portion rows L45 which are arranged substantially in a row, are orthogonal to the bending direction of the sanitary napkin HH absorbent article when worn. The direction is formed by extending the sanitary napkin width direction AY. Specifically, the high-rigidity portions of the two liquid-conducting concave portions adjacent to each other in the longitudinal direction of the sanitary napkin are arranged in a line in the width direction of the sanitary (four) to form a high-rigidity line Ur. Further, such a high-rigidity portion is arranged so as to be spaced apart from each other in the longitudinal direction of the sanitary napkin (7). By arranging the high-rigidity portions 45 in this way, it is possible to more effectively prevent the deformation of the front sheet from being larger than the absorption. The wrinkles which are generated by the amount of deformation of the body and which are orthogonal to the direction of the bending. The interval between the high-rigidity of the length of the tampon in the longitudinal direction of the sanitary napkin is preferably .5 mm to 6.0 _, particularly preferably 2 5 _~4 〇 _. In addition, the high-rigidity portion included in the high-rigidity line is preferably 15 to Μ _ in the center-to-center distance in the width direction AY of the sanitary napkin. 1.5 mm to 4.0 mm. When the high-rigidity portion is within the above range, the portion that absorbs deformation and the portion that suppresses creases can be appropriately disposed on the front sheet. The above-mentioned effects are exerted.

Further, the front sheet i B 131510.doc -41 - 200904386 in the present embodiment corresponds to the longitudinal direction of the sanitary napkin 10. The plurality of high-rigidity portion rows L45 are formed to extend in a direction orthogonal to the fiber alignment direction (X direction) of the nonwoven fabric 2 (the direction of the Υ). By this high-rigidity portion around the width direction of each concave portion, the concave portion strain mainly caused by the external force generated by the conveyance of the nonwoven fabric or the like is suppressed, and the strain is not fixed by the high rigidity portion adjacent to each concave portion. ^, therefore, the front sheet is less prone to wrinkles (elongated and caused by fixing).

Further, the high-rigidity portions 45, G' formed in the vicinity of the opening of the liquid-conducting recessed portion 4 are formed in the fiber-aligning side (10) direction of the nonwoven fabric 2, and are formed before and after each of the liquid-conducting recessed portions 4. The high-rigid portion 45 is arranged in front of the liquid-conducting recess 4 in the relationship of the directional direction of the louver fibers, whereby the high-rigidity portion 45 can be more stably stabilized by $, and can be maintained to the left and right orthogonal to the fiber alignment direction. soft. The liquid guiding recess 4 in the present embodiment has a cross section in the width direction of the sanitary napkin 10 (and a cross section π orthogonal to the fiber alignment direction of the non-woven fabric;

The thickness Ta of the bottom portion adjacent portion A is smaller than the thickness τι of the front portion 3. Therefore, the fiber density of the non-woven fabric of the adjacent portion A of the bottom surface portion is higher than the fiber density of the non-woven fabric of the front portion. Thus, the thickness Ta of the cross-sectional portion A in at least one of the longitudinal direction AX of the sanitary napkin and the width direction AY is smaller than the thickness of the front portion 3, and the mobility of the absorbent body moves. When the bottom surface portion is adjacent to each other, the liquid can be raised to the peripheral wall portion 43' of the liquid guiding recessed portion 4 in the present embodiment. As shown in Fig. 24 (8), in the cross section in the width direction AY of the sanitary napkin 10, the thickness is from the front portion 3 side to the bottom surface. The side of the portion 44 is gradually reduced, and the fiber density of the non-woven fabric constituting the peripheral wall portion a 13I510.doc • 42-200904386 gradually increases from the side of the front portion 3 toward the side of the bottom portion 44. When the fiber density is changed in the cross section in at least one of the longitudinal direction AX and the width direction AY of the sanitary napkin, the liquid moves from the front portion 3 and/or the peripheral wall portion 43 to the bottom portion adjacent portion A. The mobility 'and the mobility of the liquid to the absorber are more excellent. The thickness Ta of the adjacent portion A of the bottom surface portion of the peripheral wall portion 43 is preferably 5 to 80% of the thickness Tb of the adjacent portion B of the front portion, and more preferably 5, from the viewpoint of improving the mobility of the liquid to the movement of the absorbent body. ~5〇〇/0. The liquid-conducting concave portion 4 of the front sheet 1B of the present embodiment has a discontinuous linear shape in both directions in the X-direction and the direction orthogonal thereto (the γ direction in the drawing). On the other hand, Fig. 26 shows a view in which the front portion 3 continuously appears linearly in the fiber alignment direction (the χ direction in the drawing) of the nonwoven fabric 2 and the direction orthogonal thereto (the Υ direction in the drawing). The above-mentioned front sheet 1 can be produced, for example, in the following manner. In the preferred manufacturing method of the front sheet 1 对, a plurality of liquid-conducting recesses 4, 4, . . . , . . . are formed on the raw material reading 2G composed of the non-woven fabric, and the front sheet I is used as the front sheet. The raw material sheet (4) is not: the cloth is oriented such that the direction of the fiber is aligned with the longitudinal direction of the raw material sheet 2). As shown in the figure, the concave portion 61 is in a cross section orthogonal to the axial length of the roller 6 (Fig. 28 In the cross section (the cross section shown in FIG. 29) of the cross section along the longitudinal direction of the light beam 6, the concave portion is at the boundary between the two portions 263 (smooth surface) other than the concave portion on the inner circumferential surface. The part (concave 131510.doc •43·200904386 opening edge part) is joined at a substantially right angle. As shown in Fig. 27, if the two non-woven fabrics are joined to each other by the two rolls 5 and 6, the convex portion is used: the sheet material I is as shown in Fig. 28, and the second portion is 61. The portion (4) in the middle portion of the recessed portion 61 of the portion 2 of the squeezing portion 2 is subjected to the state τ of the "51::/face" in the position. The trowel is pressed to the ridge M1 again. The recessed portion 61 is pressed into the recessed portion 61, and the portion 23 of the raw material sheet 20 that is in contact with the tip end portion of the convex portion 51 is connected to the periphery of the portion 24 of the coffee, and there is a portion 23 which is not in contact with the convex portion and the recess portion. The part (4) is further elongated significantly compared with the other parts. : 'The above part (4) facing the extended state from the concave portion 61 is provided: the heat is used to fix (heat-set) the elongated state, and the structure is stable. When the convex portion 51 is pushed into the concave portion 61, the nonwoven fabric constituting the raw material sheet 2〇 is likely to extend in the longitudinal direction of the raw material sheet 2, and is relatively difficult to be orthogonal to the longitudinal direction. The direction (CD) is extended. Therefore, the portion of the raw material sheet in the longitudinal direction (MD) at the rear end of the concave portion 6 i is formed to be substantially The opening edge portion of the right-angled recessed portion 61 is strongly pressed and contracted, and its state is thermally fixed to form the high-rigidity portion 45. In this way, the front sheet formed with the plurality of high-rigidity portions 45 can be obtained. In the front sheet 1B, the bottom surface portion 44 is mainly composed of a portion 24 that is directly pressed by the tip end portion of the convex portion 51, and the peripheral wall portion 43 is mainly composed of the above-mentioned portion 23. 3.131510.doc •44. 200904386 Physiological sanitary napkin 10 The material to be formed is described. The absorbent body 12 and the back sheet u can be used without any particular limitation. For example, as an absorbent body, a pulp fiber material (4) can be used. A fiber mixture or an absorbent body in which an absorbent polymer is held in the fiber body, and coated with a coated sheet such as toilet paper or non-woven fabric. As the back sheet #, a thermoplastic resin may be used, or A liquid-impermeable or hydrophobic sheet such as a laminated body of the film and the non-woven fabric. The back sheet may have water vapor permeability. The present invention is not limited to the above embodiment. For example, the liquid guiding recess may be used. The planar shape of the peripheral wall portion 43 or the bottom surface portion 44 of the fourth portion is elliptical instead of the circular shape shown in Fig. 3 (further, it may be a polygonal shape such as a rhombus, a square, a rectangle, or the like, or a heart shape, a star shape, or the like. In the case where it is a polygonal shape, it is preferable that the corner portion has a degree of separation. Further, the shape of the fiber fixing portion 45 when the fiber fixing portion 45' is partially formed on the bottom surface portion 44 may be used. The square shape shown in FIG. 5 is a circle or an ellipse, a rhombus, a rectangle, a heart, a star, etc. Further, the shape of the high rigidity portion 45 may be a crescent extending in the circumferential direction of the liquid guiding recess 4 When the liquid-conducting recessed portion 4 is disposed such that the front portion 3 is disposed in a discontinuous linear shape in the direction in which the fibers are aligned in the direction in which the nonwoven fabric 2 is orthogonal to the nonwoven fabric 2, the liquid-conducting recessed portion 4 may be disposed. The liquid guiding recess 4 is disposed such that the front portion 3 continuously exists in any direction. Further, the liquid guiding recess 4 may be disposed in such a manner as to be disposed only in the portion disposed opposite to the liquid discharge portion and in the vicinity thereof, and the liquid guiding recess 4 may be disposed in this manner instead of the entire front sheet. 131510.doc -45· 200904386 In addition, between the top end portion of the convex portion 51 and the bottom portion of the receiving hole 6丨, the portion of the raw material sheet 20 directly pressed by the tip end portion of the convex portion 51 may be inserted. Pressurize. In this case, the bottom surface portion 44 of the front sheet bundle is pressurized between the top end portion of the convex portion and the bottom portion of the receiving hole, whereby the bottom surface portion (bottom portion) 44 of the surface recess portion 4 can be lifted. Rigidity, even if a compressive force is applied to the front sheet 1 in the thickness direction, the liquid guiding recess 4 is not easily crushed. In addition, the shape of the convex portion 51 and the receiving hole 61 may be respectively a diamond shape,

A polygonal shape such as a square or a rectangle, or a heart shape, a star shape, or the like, instead of a perfect circle or an ellipse %. For example, in the case of being a polygon, it is preferable that the corner has a curvature. In addition, as shown in FIG. 22, the absorbent article may be curved so as to have a concave shape in a cross-sectional shape in the width direction when worn, instead of being curved in a concave shape in the longitudinal direction. The state of the person. In addition, it is also possible to have a portion that is curved in the longitudinal direction and a portion that is curved in the width direction, and in each of the respective portions of the arrangement, the space is set in a different manner! · Health. In the front sheet 1B, two high-rigidity portions are provided in the i liquid-conducting recesses 4, but the liquid-conducting recesses 4 may be provided only in front of the liquid-conducting recesses in the fiber alignment direction. In addition, it can also be used on the front sheet.

In the portion 1B, for example, a liquid guiding recess 4 having a high rigidity portion 45 is formed on a portion of the opposing portion ca of the excretory portion. V. Alternatively, the front sheet may be oriented to the width of the fibrous article of the nonwoven fabric. In addition, in the strict sense, the high-rigidity portion 45 does not limit the boundary portion between the face portion 3 and the peripheral wall portion (four) of the liquid-conducting recess portion 4, and may also be shaped as the 131510.doc-46-200904386 or may have a front portion. 3 Across the perimeter wall portion 43 near the parent department. In addition, the length. The absorbent article of the present invention is preferably one which absorbs the liquid which is discharged from the body. As such an absorbent article, in addition to sanitary napkins, sanitary ailments, incontinence pads, disposable diapers, and breast milk can be cited. The sanitary napkin or the like may have a pair of side flap portions on the right and left sides of the opposing portion of the excretory portion. Further, the portions of the above-described embodiment which are not described and the important conditions are only applicable to the other embodiments. Further, the important conditions in the respective embodiments may be appropriately mutually between the embodiments. replace. [Industrial Applicability] The front sheet of the absorbent article of the first day and the circumstance includes a liquid guiding recess having a portion I. The cushioning property is good, and the mobility of the liquid to the absorbent body is excellent. According to the method for producing a front sheet of the second aspect of the invention, it is possible to easily produce a front sheet comprising a concave portion having a bottom portion and having good cushioning properties. According to the method for producing a front sheet of the third aspect of the invention, it is possible to efficiently produce a front sheet comprising a concave portion having a bottom portion, a cushioning property, and a good touch. The absorbent article according to the fourth aspect of the invention includes the concave portion having the bottom portion, and the liquid has a good mobility and cushioning property to move toward the absorbent body, and further, even if it is bent at the time of wearing, it is not easy to cause wrinkles on the front sheet. The front sheet for an absorbent article according to a fifth aspect of the invention includes a concave portion having a bottom portion 131510.doc • 47-200904386. The liquid has a good mobility and cushioning property to move toward the absorbent body, and is further advanced by the fiber alignment direction of the concave portion. The high rigidity portion and the recess portion do not easily cause wrinkles on the front sheet. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a perspective view showing a front sheet of an absorbent article according to an embodiment of the present invention. Fig. 2 is an enlarged cross-sectional view showing a portion of the n - D line cross section of Fig. 1 in an enlarged manner. Fig. 3 is a plan view showing the front sheet shown in Fig. 自 from the front side thereof. Fig. 4 is a plan view (corresponding to Fig. 3) of a front sheet according to another embodiment of the present invention as viewed from the front side thereof. Fig. 5 is an enlarged plan view showing a bottom surface portion of an example of a bottom surface portion of a partial fiber fixing portion. Fig. 6 is a view showing an extension of the front sheet which can be preferably used for producing the surface sheet of the present invention and a main portion of the heating device. Fig. 7 is a cross-sectional view showing a cross section (a cross section taken along the line m-m in Fig. 6) of the first and second rolls in the apparatus of Fig. 6 in the axial direction. Fig. 8 (a) to Fig. 8 (c) show the convexity used in the manufacturing method of the first embodiment. Figure 8 (a) is a cross-sectional view of the axial direction of the parent, and Figure 8 (b) and Figure 8 (c) show the receiving hole, respectively, of the 卩 and the recessed light recess (receiving hole). The shape of the opening and the cross-sectional shape of the convex portion inserted into the receiving hole. 9(a) and 9(b) are views showing other embodiments of the present invention, 131510.doc • 48· 200904386 The knife indicates the receiving hole of the female member, and the insertion hole is inserted until the insertion/wood The figure of the convex portion of the state in which the degree reaches the maximum state is equivalent to the figure. Fig. 0(a) and Fig. 1(b) are perspective views showing preferred convex portions, respectively. Fig. 11 is a perspective view showing an embodiment of a method for producing a front sheet of the present invention. Fig. 12 is a view showing an example of a front sheet manufactured by the method of Fig. ##. Fig. 13 (a) and Fig. 13 (1?) are sectional views of the front sheet shown in Fig. 13 (4), and an enlarged σj plane view of a portion taken along line 1V-IV of Fig. 12 is enlarged. 1 3 (b) is an enlarged cross-sectional view showing a part of the V _ v line section of Fig. 2 in an enlarged manner. Fig. 14 is an enlarged cross-sectional view showing, in part, an enlarged cross-section of a cross section of the line (a section along the axial direction of the embossing roll and the concave roll) of the raw material sheet. Fig. 15 is a cross-sectional view showing the same cross section as Fig. 14 without omitting the raw material sheet. Figure 16 (4) is a plan view showing the convex portion of the convex roller and the concave receiving hole shown in the figure (a cross-sectional view orthogonal to the protruding direction of the convex portion), and Figure 16 (b) is in the other Figure 16. (a) Figure equivalent. 17(a) and 17(b) are schematic cross-sectional views showing the embodiment of the present invention, respectively, showing the receiving hole of the female member and the convex portion inserted into the receiving hole until the insertion depth reaches the maximum. Picture. Figure 18 is a schematic cross-sectional view showing another embodiment of the present invention, showing a receiving hole of a female member and a convex portion inserted into the receiving hole until the depth reaches a maximum of 131510.doc • 49· 200904386 Figure. Fig. 19 is a schematic cross-sectional view showing still another embodiment of the present invention, showing a receiving hole of the female member and a convex portion inserted into the receiving hole until the insertion depth is maximized. Fig. 20 is a schematic cross-sectional view showing another embodiment of the present invention, showing a receiving hole of a female member and a convex portion in a state in which the insertion hole is inserted until the insertion depth is maximized. Fig. 21 is a view showing another embodiment of the present invention (corresponding to the drawings). Fig. 22 is a partially broken perspective view showing the sanitary cotton of the embodiment of the absorbent article of the present invention. Fig. 23 is a perspective view showing a portion of the front sheet in the sanitary napkin of Fig. 22 enlarged. Fig. 24 (a) is an enlarged cross-sectional view showing a part of a cross section taken along line j B of Fig. 23, and Fig. 24 (b) is an enlarged cross-sectional view showing a part of a cross section taken along line B- Π B of Fig. 23 in an enlarged manner. Fig. 25 is a plan view showing the front sheet shown in Fig. 23 as viewed from the front side thereof. Fig. 26 is a plan view (corresponding to Fig. 25) of the front sheet of the other embodiment of the present invention as viewed from the front side. Fig. 27 is a view showing the extension of the front sheet of Fig. 23 and the main portion of the heating device which can be preferably used for the manufacture. Fig. 28 is a cross-sectional view showing a cross section of the first and second rolls in the apparatus of Fig. 27 in the longitudinal direction of the vehicle (the line B-ffl B in Fig. 27). . 1315I0.doc • 50· 200904386 Fig. 29 is a plan view showing a cross section (a cross section taken along line IVB-IVB in Fig. 27) of the first and second rolls in the apparatus of Fig. 27 . [Description of main component symbols] 1, 1A, 1B Front sheet 2 Non-woven fabric 3 Front part 3A Top part of front sheet 4 Liquid-conducting recess 5 Convex roll 6 Recessed roll 7 Gap 10 Physiological sanitary napkin 11 Back sheet 12 Absorber 13 Flanking portion 20 Raw material sheet 22 The portion of the raw material sheet corresponding to the top surface of the front sheet 23 and the convex portion and the contact portion of any of the 24 raw material sheets 31. The front surface of the front portion 32 The back surface of the front portion 41 The front part of the recess 42 is partially pressed by the top part of the back material of the liquid-conducting recess and is directly squeezed 1315I0.doc •51 · 200904386

43 peripheral wall portion 44 bottom portion 45 high rigidity portion 45' fiber fixing portion 46 abutting portion of high rigidity portion 46 portion other than fiber fixing portion 51 convex portion 51a top end 51b base end 52, 63a inclined surface 53 protruding portion 54 non-protruding portion 61 recessed portion 6 1 a , 61b inner surface of receiving hole 62 opening edge portion 63 of receiving hole receiving surface 153 around receiving hole portion 162, 163 other than convex portion of outer peripheral surface of convex roller receiving inner surface 164 of concave hole The portion other than the recess 262 The inner peripheral surface of the recess 263 The portion other than the recess of the concave roller A The portion of the peripheral wall portion adjacent to the bottom portion AX The longitudinal direction AY The width direction 131510.doc -52- 200904386 B The front portion adjacent portion CA The drain portion Center line CL6 of the convex portion of the convex portion CL6 The center line D of the receiving hole South LI, L11 Shortest distance L2, L12 Longest distance L3, L13 Distance L4, L14 Insertion depth L63a ' L52 Length of the inclined surface LX, LY Line LX' Length in the axial direction LY' Length in the circumferential direction PI Top position of the convex portion T, T1, Ta, thickness Tb, L 23 W Width W1, W2 Diameter X Fiber alignment direction Y Direction orthogonal to the fiber alignment direction Z Thickness direction Z' Depth direction Z" Protruding direction of the convex part 131510.doc -53-

Claims (1)

200904386 X. Patent application scope: 1. A front sheet of absorbent articles, which is formed by forming a front portion and a plurality of liquid guiding recesses on a non-woven fabric, wherein the front side of the front portion contacts the skin, and the front surface of the liquid guiding recess The side is formed in a concave shape, and the back side is protruded toward the absorber; the recessed liquid guiding recess has a peripheral wall portion and a bottom surface portion. The position of the bottom portion is closer to the absorber than the back surface of the front portion, and the peripheral wall portion is adjacent to the bottom portion. The thickness of the portion is smaller than the thickness of the front portion. 2. The front sheet of the absorbent article of the request, wherein the thickness of the upper peripheral wall portion is gradually thinned from the front surface side toward the bottom surface portion side. 3. The front sheet of the absorbent article of the claim, wherein the thickness of the portion of the peripheral wall portion adjacent to the front portion is less than the frontal degree. 4. The front sheet of the absorbent article of claim 1 2 3 4 5 6 7 wherein said bottom portion = said non-woven fabric has a point of bonding of fibers to each other and maintains liquid permeation through 131510.doc 1 Π: an absorbent article The front sheet, wherein the above-mentioned liquid guiding concave 2 square 面部 face is in the direction of the fiber alignment of the above non-woven fabric or with the 3 . The direction of the father is not in a continuous straight line. τ 又 又 万 加以 6. 6. 6. 6. 6. 6. 6. 6. 6. 6. 6. 6. 6. 6. 6. 6. 6. 6. 6. 6. 6. 6. 6. 6. 6. 6. 6. 6. 6. 6. 6. 6. 6. 6. 6. 6. 6. 6. 6. 6. 6. 6. 6. 6. 6. 6. Fiber fixing portion. 7 - Method for manufacturing a front sheet, Sun Wei; s』, a plurality of convex portions... The sheet is supplied to a male member having a male member and a plurality of receiving holes 200904386 for inserting the convex portion Between the members, a part of the raw material sheet is extruded into the receiving hole by the convex portion to be deformed into a concave shape. By heating, the concave deformed shape is fixed, thereby producing an absorption having a plurality of concave portions. a front sheet of the article; a non-woven fabric is used as the raw material sheet so as to be in contact with any of the convex portion and the inner surface of the receiving hole around the portion directly pressed by the tip end portion of the convex portion Part of the manner, the raw material sheet is extruded into the receiving hole, and is inserted into the receiving hole in a state in which the convex portion is inserted into the receiving hole to a position at a top end position of the convex portion or a deeper position. Heating is performed to fix the concave shape of the concave shape by heating. The method of manufacturing the front sheet of claim 7, wherein the non-woven fabric is a hot air non-woven fabric. 9. The front sheet of claim 7 is π,丄必尽竹月材=thickness is less than 3.0 mm, and the shortest distance between the convex portion and the opening edge portion of the receiving hole is 0.7 or more in a state where the convex portion is inserted into the receiving hole, so that the above The distance between the face of the female member located around the receiving hole and the opposing face of the male member is 1 claw (7) or more. 10. The front sheet f of the claim 7 is returned to the method of the method, t The raw material sheet is directly subjected to the inner surface of the receiving hole by the tip end portion of the convex portion. The male sheet member is not in contact with the core sheet material of the method of claim 10, wherein the male member has contact with the end portion of the m sheet. The raw material sheet touches the part of the above-mentioned raw material sheet. I do not accept the I3I510.doc 200904386. The monthly sheet of the item 7 has a bottom, and the above-mentioned receiving hole has a '" The top end portion of the portion is pressed between the bottom portions of the direct core holes in the raw material sheet, and the portion 13 of the convex portion is pressed against the peripheral surface of the request portion 7 on the circumferential surface. There is a method in which the male member is attached to the above-mentioned convex portion, and the female member has the above-mentioned receiving hole on the circumferential surface and is interlocked with the door to be unloaded with M 柷The manufacturing method of the front sheet of the concave roller, the workpiece, and the third, the opening shape of the crucible is the length of the shaft of the concave roller; the length of the direction of the connection and the money is longer. Circumference 1 5. A type of front sheet material is supplied to the sheet, and the original member is formed by a fibrous material, and a portion of the sheet having the convex portion is extruded into the above The convex portion of the inner portion of the inner core is deformed into a concave shape by heating the original sheet, and the front surface sheet of the concave portion is deformed by heating; h has a plurality of concave receiving holes The inner surface of the folding 岂 00 4... is formed as an inclined surface, and the " face is licked from the receiving hole On the depth side, gradually away from the ice that picks up the fine force + +. The side opening portion and the center line of the shoulder receiving hole are inclined; the male member and the female member are heated. The portion of the raw material sheet is extruded by the convex portion into the above (four) and The state in which the portion corresponding to the front sheet of the raw material sheet does not contact the male member is fixed by the concave deformation shape of the portion of the receiving hole λ. The method of manufacturing a front sheet according to claim 15, wherein the convex portion has an inclined surface on a proximal end side of the canine-out direction, the inclined surface being in a direction larger than the convex portion The tip end is inclined toward the proximal end side and gradually away from the center line of the convex portion. The method of manufacturing a front sheet according to claim 15, wherein a gap width between the inclined surface of the convex portion and the inclined surface of the receiving hole is along with a state in which the convex portion is inserted into the receiving hole The ridge is gradually enlarged away from the center line of the convex portion and the receiving hole. 18. The method of manufacturing a front sheet according to claim 15, wherein the inner surface of the receiving hole extends to a position of a top end of the convex portion or a deeper position in a state where the convex portion is inserted into the receiving hole. 19. The sheet flocing method according to claim 15, wherein the thickness of the raw material sheet and the wood are two 3 mm, and the upper, the upper, the upper, and the tenon are inserted into the receiving hole. In the state, the distance between the upper surface of the female member and the opposing surface of the male member is 1 mm or more. 2〇·=Π manufacturing method of the front sheet> wherein the raw material sheet is said to receive the hole: the portion of the inner surface of the convex portion which is pressed at the top end is not in contact with the upper surface. 21. The method for manufacturing the front sheet of claim 20, The tip end portion of the convex portion has a portion that contacts the raw material sheet. The portion of the sheet and the portion not including the male member have a concave roller having the above-mentioned convex portion of the above-mentioned convex portion on the circumferential surface of the front surface of the claim sheet. The manufacturing method of the material, wherein the upper convex roller, the female member is 131510.doc 200904386 23. An absorbent article comprising a liquid permeable front sheet, a back sheet, and the two sheets The absorbent body is substantially a vertically long absorbent article; the front sheet is composed of a non-woven fabric including a front surface that contacts the skin on the front side, and a plurality of guides that have a peripheral wall portion and a bottom portion and protrude toward the absorber side. The liquid recessed portion has a high rigidity (four) at a boundary portion of the front surface portion and the peripheral wall portion or a vicinity thereof when viewed in a longitudinal direction of the absorbent article, and the rigidity of the high rigidity portion is greater than the front portion and the peripheral wall The absorbent article according to claim 23, wherein the fiber density of the high rigidity portion is higher than the fiber density of the front portion and the peripheral wall portion. 25. The absorbent article according to claim 23, wherein the liquid-conducting concave portion is disposed in a tin-tooth shape when the absorbent article is viewed in plan, and the plurality of high-rigidity portions are intermittently arranged in a substantially-lined plurality of heights. The rigid portion is formed to extend in the width direction of the absorbent article. 26. The absorbent article of item 25, wherein the high rigidity portion is formed in a direction orthogonal to a direction in which the fibers of the nonwoven fabric are aligned. 27. A contact surface for an absorbent article, 'a front sheet, the skin for the absorbent article is composed of a non-woven fabric.' The nonwoven fabric comprises a front side contacting the front side of the skin and having a peripheral wall portion and a bottom portion and guiding the liquid toward the absorbent body side. The recessed portion has a profile portion which is less along the direction of the fiber alignment direction of the non-woven fabric, and has a high rigidity portion at or near the boundary portion between the front surface 13I5I0.doc 200904386 and the peripheral wall portion, and the rigidity of the rigid portion is greater than the front portion and the peripheral wall The department is high. 131510.doc