CN1909865A - Absorptive article and inner absorptive article - Google Patents

Abstract

In an absorbent article (1) including a liquid-permeable topsheet (2) positioned at a surface that contacts with a human body; a non liquid-permeable backsheet (3) positioned at a surface opposite to the topsheet (2); and an absorbent body 4 provided between the topsheet (2) and the backsheet (3), a three-dimensional gather (6) is formed by a folding portion (32) at which the backsheet (3) is folded up to the topsheet (2) side along both side portions in a longitudinal direction of the absorbent body (4), and a nonwoven fabric at least partially adhered to this folding portion (32). The three-dimensional gather (6) has a free end (62) structured with the nonwoven fabric.

Description

Absorbent articles and inner absorbent articles

technical field

The present invention relates to an absorbent article and an inner absorbent article.

Background technique

It is known in the prior art that, in an absorbent pad provided as a diaper attached to a diaper or a diaper package, etc., in order to prevent leakage and seepage of body fluids absorbed by the absorbent body, a Sculpted pleats. Known as the method for forming three-dimensional pleats, for example, on the top sheet, as a pleat sheet, a non-woven fabric (hydrophobic or water-repellent treated non-woven fabric) that is difficult to permeate liquid is attached. and so on and so on (for example, refer to Patent Document 1) and the like.

Patent Document 1: Japanese Patent Laid-Open No. 2003-265521

However, in the case of the absorbent pad described in the above-mentioned Patent Document 1, it is formed by affixing a separate non-woven fabric (hydrophobic or water-repellent treated non-woven fabric) or the like that is difficult to permeate liquid on the upper surface of the top sheet. Three-dimensional pleats, so even if the three-dimensional pleats are in contact with the human body, it will not bring a tingling feeling of use and will not damage the feeling of use, but there is a problem that it cannot completely prevent sticking from the top sheet. Leakage or oozing of body fluids at the part of the device will give the user a sense of insecurity, or discomfort during leakage or oozing.

Contents of the invention

An object of the present invention is to provide an absorbent article and an inner absorbent article having three-dimensional gathers capable of preventing leakage or seepage of bodily fluids.

In order to solve the above-mentioned problems, the invention described in claim 1 provides an absorbent article comprising: a liquid-permeable top sheet positioned on a surface in contact with a human body; A liquid-impermeable back sheet on the top, and an absorbent body sandwiched between the top sheet and the back sheet; it is characterized in that the folded portion and at least a part of the folded portion are attached to the folded portion. The non-woven fabric forms three-dimensional pleats, and the folded-back portion is formed by folding the back sheet toward the top sheet side along the longitudinal side edges of the absorber. The free ends of the three-dimensional pleats are , consisting of said non-woven fabric.

In the invention according to claim 2, in the absorbent article according to claim 1, the nonwoven fabric is attached to a surface opposite to the top sheet of the folded portion. on one side of the face.

In the invention according to claim 3, in the absorbent article according to claim 2, the nonwoven fabric is formed with the inner side in the width direction of the turning-back starting point of the turning-back portion as the bonding starting point, and is Mounted on the back sheet.

In the invention according to claim 4, in the absorbent article according to claim 1, the nonwoven fabric is attached to a surface of the folded portion facing the top sheet.

The invention according to claim 5 is the absorbent article according to claim 1, wherein the nonwoven fabric is attached to the top sheet.

The invention according to claim 6 provides an absorbent article comprising: a liquid-permeable top sheet located on a surface in contact with a human body, and a liquid-impermeable top sheet located on a surface opposite to the top sheet. a permanent back sheet, and an absorber sandwiched between the top sheet and the back sheet; it is characterized in that the top sheet extends to cover both sides of the folded portion of the back sheet, Thereby, three-dimensional gathers are formed in which the folded-back portions of the back sheet are folded back toward the top sheet side substantially along both longitudinal edge portions of the absorber.

In the invention according to claim 7, in the absorbent article according to claim 6, the top sheet has a liquid-permeable region above the absorber, and covers the back sheet. The regions are formed to be more impermeable to liquids than the regions located on the upper side of the absorbent body.

The invention according to claim 8 provides an absorbent article comprising: a liquid-permeable top sheet positioned on a surface in contact with a human body; and a liquid-impermeable top sheet positioned on a surface opposite to the top sheet. A permanent back sheet, an absorbent body sandwiched between the top sheet and the back sheet, and three-dimensional pleats erected on the top sheet side and on both longitudinal edges of the absorbent body Pleats; characterized in that a folded portion, an attachment portion, and a bonding portion are formed; the folded portion is formed by folding the back sheet to the top sheet side approximately along the longitudinal side edges of the absorber. The mounting part is mounted on the longitudinal side edges of the top sheet with a part of the folded part; the bonding part is used to fold the mounting part back toward the top sheet and bonded to the top surface sheet; at least a part of the three-dimensional pleats is formed by the folded-back portion.

In the invention according to claim 9, in the absorbent article according to claim 8, the three-dimensional gathers are formed by the folded portion and at least a part of the liquid-impermeable seal attached to the folded portion. The non-woven fabric is formed; the free end of the three-dimensional pleats is made of the liquid-impermeable non-woven fabric.

In the invention according to claim 10, in the absorbent article according to claim 9, the liquid-impermeable nonwoven fabric is attached to the folded portion and the top sheet. Opposite face The face on the opposite side.

In the invention according to claim 11, in the absorbent article according to claim 10, the liquid-impermeable nonwoven fabric is bonded on the inner side in the width direction of the turning-back starting point of the turning-back portion. The starting point is mounted on the back sheet.

In the invention according to claim 12, in the absorbent article according to claim 9, the back sheet is composed of a laminated nonwoven fabric; the liquid-impermeable nonwoven fabric is attached to the The face of the folded portion opposite to the top sheet.

The invention according to claim 13 provides an absorbent article comprising: a liquid-permeable top sheet positioned on a surface in contact with a human body, and a liquid-impermeable top sheet positioned on a surface opposite to the top sheet. A permanent back sheet, an absorbent body sandwiched between the top sheet and the back sheet, and three-dimensional pleats erected on the top sheet side and on both longitudinal edges of the absorbent body Pleats; it is characterized in that the three-dimensional pleats are formed by extending the top sheet to cover both sides of the folded portion of the back sheet, and the folded portion of the back sheet is roughly along the longitudinal direction of the absorber. The side edge portion is folded back toward the top sheet side; adhesive portions are formed approximately along the longitudinal side edges of the absorber near the folding starting point of the folded portion, and the adhesive portion faces toward the top. The dough pieces are folded back, glued between the top dough pieces.

In the invention according to claim 14, in the absorbent article according to claim 13, the top sheet is liquid-permeable in a region above the absorber, and covers the back sheet. The area is liquid-tight.

The invention according to claim 15 provides an inner absorbent article comprising: a liquid-permeable top sheet located on a surface contacting a human body; and an impermeable top sheet located on a surface opposite to the top sheet. A liquid back sheet, and an absorber sandwiched between the top sheet and the back sheet; it is characterized in that three-dimensional pleats are formed by the folded portion and the non-woven fabric; the folded portion is approximately The back sheet is folded back toward the top sheet side along the longitudinal side edges of the absorber; the non-woven fabric is attached to the folded part opposite to the top sheet The face on the opposite side of the face, and the width direction inner side of the folding starting point of the folding part is used as the bonding starting point to be attached on the back sheet; the free end of the three-dimensional pleats is formed by the Made of non-woven fabric.

Here, the "inner absorbent article" means an absorbent article of a type that is attached to the outside of a diaper package or the like during use.

The invention described in claim 16 provides an inner absorbent article comprising: a liquid-permeable top sheet positioned on a surface that comes into contact with a human body, and an impervious top sheet positioned on a surface opposite to the top sheet. A liquid back sheet, and an absorber sandwiched between the top sheet and the back sheet; it is characterized in that three-dimensional pleats are formed by the folded portion and the non-woven fabric; the folded portion is approximately The back sheet is folded back toward the top sheet side along the longitudinal side edges of the absorber, and one end of the nonwoven fabric in the longitudinal direction is attached to the folded portion and the The opposite surface of the top sheet and the other end in the length direction are attached to the top sheet; the free end of the three-dimensional folds is made of the non-woven fabric.

In the invention according to claim 17, in the inner absorbent article according to claim 16, the nonwoven fabric is folded back, and the free end of the three-dimensional gathers is a starting point of folding back of the nonwoven fabric. department.

The invention according to claim 18 provides an inner absorbent article comprising: a liquid-permeable top sheet located on a surface in contact with a human body; and an impermeable top sheet located on a surface opposite to the top sheet. A liquid back sheet, and an absorber sandwiched between the top sheet and the back sheet; characterized in that the top sheet extends to cover both sides of the folded portion of the back sheet To form three-dimensional gathers, the folded-back portions of the back sheet are folded back toward the top sheet side substantially along both longitudinal edge portions of the absorber.

The invention according to claim 19 is the inner absorbent article according to any one of claims 15 to 18, wherein a mark for alignment in the longitudinal direction is formed on the folded-back portion of the back sheet.

The invention according to claim 20 is, in the inner absorbent article according to any one of claims 15 to 19, characterized in that at both sides in the longitudinal direction of the absorber, all the points along the longitudinal direction are A space is provided between the top sheet and the back sheet.

The invention according to claim 21 provides an inner absorbent article comprising: a liquid-permeable top sheet positioned on a surface in contact with a human body; and an impermeable top sheet positioned on a surface opposite to the top sheet. A liquid backsheet, an absorber sandwiched between the topsheet and the backsheet, and three-dimensional fabrics standing on both sides of the absorber in the longitudinal direction on the side of the topsheet. pleats; characterized in that a folded portion, an attachment portion, and an adhesive portion are formed; the folded portion folds back the back sheet toward the top sheet side approximately along the longitudinal side edges of the absorber formed; the mounting part, a part of the folded part is mounted on the longitudinal two side edges of the top surface sheet; Fold back and bond with the top surface sheet; at least a part of the three-dimensional gathers is formed by the folded back part.

The invention according to claim 22 provides an inner absorbent article comprising: a liquid-permeable top sheet located on a surface contacting a human body; and an impermeable top sheet located on a surface opposite to the top sheet. A liquid backsheet, an absorber sandwiched between the topsheet and the backsheet, and three-dimensional fabrics standing on both sides of the absorber in the longitudinal direction on the side of the topsheet. Pleats; it is characterized in that the three-dimensional pleats are formed by extending the top sheet to cover both sides of the folded portion of the back sheet, and the folded portion of the back sheet is roughly along the longitudinal direction of the absorber Both side edges are folded back toward the top sheet side; adhesive portions are formed approximately along the longitudinal side edges of the absorber in the vicinity of the folding starting point of the folded portion, and the adhesive portions are formed toward the The top panel is folded back, bonding between said top panels.

According to the invention described in claim 1, by folding back the back sheet toward the top sheet side, the absorber is covered by the back sheet from the bottom surface of the absorber to the side surfaces and a part of the upper surface, so that not only the back sheet as a liquid-impermeable sheet can be three-dimensionally The roots constituting the three-dimensional pleats, and the free ends of the three-dimensional pleats may also be made of non-woven fabric.

Thereby, it does not give a stinging feeling of use during use, has a good feeling of use, and can prevent skin discomfort.

Furthermore, when body pressure is applied to the absorbent article, bodily fluids pushed out from the absorber can be prevented from leaking or oozing outside from the base of the three-dimensional gathers.

In addition, the three-dimensional pleats are composed of two layers of the back sheet and the non-woven fabric, which can more reliably prevent the leakage and seepage of body fluids.

Furthermore, since the base of the three-dimensional gathers, that is, the rising portion is continuously formed by the folded back sheet, it is not necessary to provide an adhesive region or the like for forming the rising portion on the upper surface of the absorber.

Thereby, a sufficient area can be secured on the upper surface of the absorber, and when bodily fluid flows onto the upper surface of the absorber, the absorption can be performed smoothly, and leakage of bodily fluid can be prevented.

Furthermore, since the packaged body is placed on the packaged body to cover the bottom surface and side surfaces of the packaged body with the packaged body, the both sides of the packaged body extended on the packaged body are folded back toward the packaged body side and fixed. Or by making it free (hereinafter referred to as a roll top (front roll ki)) to wrap the absorber, there is no need to form side flaps. Thereby, the absorbent article does not shrink in the longitudinal direction, and the absorbent article can be worn smoothly during use.

According to the invention described in claim 2, the same effect as the invention described in claim 1 can of course be obtained. The side surface, that is, the skin contact surface is affixed with non-woven fabric, so the folded part does not come into contact with the human body.

Thereby, stimulation to the skin during wearing can be suppressed, and not only the feeling of use can be further improved, but also the discomfort of the skin can be reduced.

According to the invention described in claim 3, of course, the same effect as that of the invention described in claim 2 can be obtained. Since it is suitable for the back sheet, the non-woven fabric covers all the way to the side of the absorber, which not only improves the feeling of use more reliably, but also reduces skin discomfort.

According to the invention of claim 4, the same effect as that of the invention described in claim 1 can be obtained as a matter of course. , It can also be expected to give the user a soft feeling of use.

According to the invention described in claim 5, the same effect as the invention described in claim 1 can be obtained, of course, since the nonwoven fabric is attached to both the back sheet and the top sheet, it can be more reliably attached to the absorbent article. Fixed non-woven fabric, reinforced three-dimensional pleats, high effect of preventing leakage.

In addition, by forming the three-dimensional gathers with at least two layers of the back sheet and the nonwoven fabric, it is possible to more reliably prevent leakage and exudation of bodily fluids.

According to the invention described in claim 6, the three-dimensional gathers are formed by the back sheet and the top sheet covering both sides of the folded-back portion of the back sheet.

Thereby, when body pressure is applied to an absorbent article, bodily fluid pressed out from the absorber can be prevented from seeping out from the base of the three-dimensional gathers.

In addition, by wrapping and covering the folded portion of the folded back sheet with the top sheet, the folded portion does not come into contact with the human body.

Thereby, it is possible to prevent skin irritation during wearing, and not only improve usability, but also reduce skin discomfort.

In addition, the three-dimensional pleats have the properties of cloth, and can be expected to give the user a soft feeling of use.

According to the invention described in claim 7, the same effect as that of the invention described in claim 6 can be obtained, in particular, the three-dimensional gathers are located on the upper surface of the absorbent body by the ratio of the liquid-impermeable back sheet and the top sheet. The region is more impermeable to liquid, so that the leakage of body fluid can be more reliably prevented.

In addition, the three-dimensional pleats have the properties of cloth, and can be expected to give the user a soft feeling of use.

According to the invention described in claim 8, the back sheet is folded back toward the top sheet side, and the top sheet is attached to the folded-back portion to form a mounting portion. The mounting portion is bonded to the top sheet, and The root portion of the three-dimensional pleats is fixed, that is, the rising portion.

Therefore, not only the three-dimensional pleats stand up firmly, have sufficient height, maintain the absorbing performance, but also give the user a visual sense of security.

In addition, by fixing the roots of the three-dimensional gathers, lateral swelling can be suppressed, and the three-dimensional gathers can be prevented from being extruded on the conveying line. Thereby, conveyance can be performed easily.

Furthermore, the back sheet covers the absorber from the bottom surface of the absorber to the side surfaces and a part of the upper surface, and the base of the three-dimensional gathers is three-dimensionally constituted by the back sheet which is a liquid-impermeable sheet.

Thereby, when body pressure is applied to the absorbent article, bodily fluids pushed out from the absorber can be prevented from leaking or oozing outside from the base of the three-dimensional gathers.

Moreover, since the packaged body is placed on the packaged body to cover the bottom surface and the side surface of the packaged body with the packaged body, the both sides of the packaged body extended on the packaged body are folded back and fixed to the packaged body side or Since the absorbent body is wrapped by such a packaging method (hereinafter referred to as roll top), it is not necessary to form side flaps.

Thereby, the absorbent article does not shrink in the longitudinal direction, and the absorbent article can be worn smoothly during use.

According to the invention described in claim 9, of course, the same effect as that of the invention described in claim 8 can be obtained. In particular, not only the three-dimensional gathers are composed of two layers of the back sheet and the liquid-impermeable nonwoven fabric, but also the three-dimensional gathers The free ends of the pleats are made of liquid-impermeable non-woven fabric.

As a result, not only can the leakage and oozing of bodily fluids be prevented more reliably, but also, even if the free ends of the three-dimensional pleats are in contact with the skin during use, it will not give a tingling feeling of use, has a high wearing feeling, and can reduce the Skin discomfort.

According to the invention described in claim 10, the same effect as the invention described in claim 9 can be obtained, in particular, by attaching a liquid-impermeable non-woven fabric to the skin contact surface of the turn-back portion, the turn-back portion, That is, the back sheet does not come into direct contact with the human body.

In this way, it is possible to prevent irritation to the skin during wearing, and not only improve the feeling of use, but also reduce discomfort to the skin.

According to the invention described in claim 11, the same effect as the invention described in claim 10 can be obtained as a matter of course. In particular, the liquid-impermeable nonwoven fabric has the inner side in the width direction of the turning-back starting point of the turning-back portion as the bonding starting point. Ground is mounted on the backside sheet.

As a result, the non-woven fabric covers all the way to the side of the absorber, and the back sheet does not come into contact with the skin. This not only improves the feeling of use more reliably, but also reduces discomfort to the skin.

According to the invention described in claim 12, it is obvious that the same effects as those of the invention described in claim 9 can be obtained, in particular, the properties of cloth are imparted to the back sheet.

Thereby, even if the back sheet is used as the skin-contacting surface, a soft feeling of use can be given to the user, and a soft feeling of use can also be expected visually.

According to the invention described in claim 13, the three-dimensional gathers are formed by the back sheet and the top sheet covering both sides of the folded-back portion of the back sheet.

Thereby, when body pressure is applied to an absorbent article, bodily fluid pressed out from the absorber can be prevented from seeping out from the base of the three-dimensional gathers.

In addition, by covering the folded-back portion of the folded-back back sheet with the top sheet, the fold-back portion made of the back sheet does not come into contact with the human body.

Thereby, it is possible to prevent skin irritation during wearing, and not only improve usability, but also reduce skin discomfort.

In addition, the three-dimensional pleats have the properties of cloth, and can be expected to give users a soft feeling of use.

Moreover, by bonding the roots of the three-dimensional pleats to the top sheet, not only the roots of the three-dimensional pleats stand up firmly and have a sufficient height, maintaining the absorption performance, but also obtaining visual security for the user .

In addition, by fixing the roots of the three-dimensional gathers, lateral swelling can be suppressed, and variations in the shape of each product caused by three-dimensional gathers being extruded on the conveying line can be prevented, and conveyance can be easily carried out.

According to the invention described in claim 14, the same effects as those of the invention described in claim 13 can of course be obtained. In particular, the three-dimensional gathers are composed of a liquid-impermeable back sheet and a liquid-impermeable top sheet.

Thereby, exudation of bodily fluid can be more reliably prevented.

In addition, by giving the three-dimensional gathers the properties of cloth, it is expected that the user will be given a soft feeling of use.

According to the invention described in claim 15, by folding back the back sheet toward the top sheet side, the absorber is covered with the back sheet from the bottom surface of the absorber to the side surfaces and a part of the upper surface, and not only the back sheet which is a liquid-impermeable sheet can be three-dimensionally constituted. The roots of the three-dimensional pleats, and the free ends of the three-dimensional pleats can also be made of non-woven fabric.

Thereby, it does not bring a stinging feeling of use, has a good feeling of use, and prevents skin discomfort.

In addition, when body pressure is applied to the inner absorbent article, bodily fluids pressed out of the absorber can be prevented from leaking or oozing outside from the base of the three-dimensional gathers.

In addition, the three-dimensional pleats are composed of two layers of the back sheet and the non-woven fabric, which can more reliably prevent the leakage and seepage of body fluids.

Furthermore, since the base of the three-dimensional gathers, that is, the rising portion is continuously formed by the folded back sheet, there is no need to provide an adhesive region or the like for forming the rising portion on the upper surface of the absorber.

Thereby, a sufficient area can be secured on the upper surface of the absorber, and when bodily fluid flows onto the upper surface of the absorber, the absorption can be performed smoothly, and leakage of bodily fluid can be prevented.

Moreover, since the bottom surface and side surfaces of the packaged body are covered with the packaged body by placing the packaged body on the packaged body, the both sides of the packaged body extending above the packaged body are folded back toward the packaged body side and fixed or Since the absorber is wrapped by such a method (hereinafter referred to as roll top), it is not necessary to form side flaps. Accordingly, the inner absorbent article does not shrink in the longitudinal direction, and the inner absorbent article can be smoothly attached to a diaper or a diaper package during use.

According to the invention described in claim 16, since the nonwoven fabric is attached to both the back sheet and the top sheet, the nonwoven fabric can be more reliably fixed to the absorbent article, and the three-dimensional gathers are reinforced to prevent leakage. good.

In addition, the three-dimensional gathers are composed of at least two layers of the back sheet and the non-woven fabric, so that leakage and seepage of bodily fluids can be more reliably prevented.

In addition, when body pressure is applied to the absorbent article, bodily fluids pushed out from the absorber can be prevented from leaking or oozing outside from the base of the three-dimensional gathers.

In addition, since the free ends of the three-dimensional pleats are made of non-woven fabric, it does not bring a tingling feeling of use when used, and has a good feeling of use, which can prevent skin discomfort.

In addition, the three-dimensional pleats have the properties of cloth, and can be expected to give the user a soft feeling of use.

According to the invention described in claim 17, of course, the same effect as that of the invention described in claim 16 can be obtained. Since the free ends of the three-dimensional gathers are formed by the folded starting point of the nonwoven fabric, not only can it be suppressed that the It stimulates the skin, improves the feeling of use, and can further reduce the discomfort of the skin.

According to the invention described in claim 18, the three-dimensional gathers are formed by the back sheet and the top sheet covering both sides of the folded-back portion of the back sheet.

Thereby, when body pressure is applied to the inner absorbent article, bodily fluids pushed out from the absorber can be prevented from seeping out from the base of the three-dimensional gathers.

In addition, the folded portion of the folded back sheet is covered with the top sheet so that the folded portion does not come into contact with the human body.

Thereby, it is possible to prevent skin irritation during wearing, and not only improve usability, but also reduce skin discomfort.

In addition, the three-dimensional pleats have the properties of cloth, and can be expected to give users a soft feeling of use.

According to the invention described in claim 19, the same effect as the invention described in any one of claims 15 to 18 can be obtained, of course, the mark for alignment in the longitudinal direction is formed on the folded portion of the back sheet, and the alignment in the longitudinal direction The mark for position corresponds to the mark for position alignment provided in the longitudinal direction on the diaper to which an inner absorbent article is attached, or the package body of a diaper.

Thereby, the inner absorbent article can be quickly and surely worn at an appropriate position in the longitudinal direction of the diaper or the diaper package. Therefore, not only can the trouble of replacing the inner absorbent article be reduced, but also the movement during wearing can be prevented, and the leakage of bodily fluid can be reliably prevented.

According to the invention described in claim 20, the same effect as the invention described in any one of claims 15 to 19 can of course be obtained. There is a space department.

Thereby, the bodily fluid overflowing from the absorber can be diffused in the space, and not only can the bodily fluid be prevented from oozing to the outside, but also the deodorizing effect can be enhanced.

According to the invention described in claim 21, the back sheet is folded back toward the top sheet side, and the top sheet is attached to the folded-back portion to form a mounting portion, and the mounting portion is bonded to the top sheet so that The face sheet fixes the root of the three-dimensional pleats, that is, the rising portion.

Therefore, not only the three-dimensional pleats stand up firmly, have sufficient height, maintain the absorbing performance, but also give the user a visual sense of security.

In addition, by fixing the roots of the three-dimensional gathers, lateral swelling can be suppressed, and the three-dimensional gathers can be prevented from being extruded on the conveying line. Thereby, conveyance can be performed easily.

Furthermore, the absorbent body is covered with the back sheet from the bottom surface to the side surface and part of the upper surface of the absorbent body, and the base of the three-dimensional gathers is three-dimensionally formed by the back sheet which is a liquid-impermeable sheet.

Thereby, when body pressure is applied to the inner absorbent article, bodily fluids pushed out from the absorber can be prevented from leaking or oozing outside from the base of the three-dimensional gathers.

Moreover, since the packaged body is placed on the packaged body to cover the bottom surface and side surfaces of the packaged body with the packaged body, the both sides of the packaged body extended on the packaged body are folded back and fixed to the packaged body side or Since the absorbent body is wrapped by such a packaging method (hereinafter referred to as roll top), it is not necessary to form side flaps.

Accordingly, the inner absorbent article does not shrink in the longitudinal direction, and the inner absorbent article can be smoothly attached to a diaper or a diaper package during use.

According to the invention described in claim 22, the three-dimensional gathers are formed by the back sheet and the top sheet covering both sides of the folded-back portion of the back sheet.

Thereby, when body pressure is applied to the inner absorbent article, bodily fluids pushed out from the absorber can be prevented from seeping out from the base of the three-dimensional gathers.

In addition, by covering the folded-back portion of the folded-back back sheet with the top sheet, the fold-back portion formed by the back sheet does not come into contact with the human body.

Thereby, it is possible to prevent skin irritation during wearing, and not only improve usability, but also reduce skin discomfort.

Furthermore, by giving the three-dimensional gathers the properties of cloth, it is expected to provide a user with a soft feeling of use.

Furthermore, by bonding the bases of the three-dimensional gathers to the top sheet, the bases of the three-dimensional gathers stand up firmly and have a sufficient height, so that the absorption performance is maintained, and a visual sense of security can be obtained for the user.

In addition, by fixing the roots of the three-dimensional gathers, lateral swelling can be suppressed, and variations in the shape of each product caused by three-dimensional gathers being extruded on the conveying line can be prevented, and conveyance can be easily carried out.

Description of drawings

Fig. 1 is a developed view of an absorbent pad to which the first embodiment of the absorbent article of the present invention is applied.

Fig. 2 is a sectional view taken along line II-II' of Fig. 1 .

Fig. 3 is a cross-sectional view of a portion corresponding to II-II' of the first embodiment in an absorbent pad to which the second embodiment of the absorbent article of the present invention is applied.

Fig. 4 is a cross-sectional view of a portion corresponding to II-II' of the first embodiment in an absorbent pad according to a third embodiment of the absorbent article to which the present invention is applied.

Fig. 5 is a cross-sectional view of a portion corresponding to II-II' of the first embodiment in an absorbent pad according to a fourth embodiment of the absorbent article to which the present invention is applied.

Fig. 6 is a cross-sectional view of a part corresponding to II-II' of the first embodiment in an absorbent pad according to a fifth embodiment of the absorbent article to which the present invention is applied.

Fig. 7 is an explanatory view for explaining a method of manufacturing the absorbent pad of Fig. 6 .

Fig. 8 is a cross-sectional view of a portion corresponding to II-II' of the first embodiment in an absorbent pad according to a sixth embodiment of the absorbent article to which the present invention is applied.

Fig. 9 is a cross-sectional view showing a modified example of an absorbent pad to which the sixth embodiment of the absorbent article of the present invention is applied.

Fig. 10 is a perspective view of an absorbent pad to which a seventh embodiment of the absorbent article of the present invention is applied.

Fig. 11 is a sectional view taken along line XI-XI' of Fig. 10 .

Fig. 12 is a cross-sectional view of a portion corresponding to XI-XI' of the seventh embodiment in an absorbent pad according to an eighth embodiment of an absorbent article to which the present invention is applied.

Fig. 13 is a cross-sectional view of a portion corresponding to XI-XI' of the seventh embodiment in an absorbent pad according to a ninth embodiment of the absorbent article to which the present invention is applied.

Fig. 14 is a cross-sectional view of a portion corresponding to XI-XI' of the seventh embodiment in an absorbent pad according to a tenth embodiment of the absorbent article to which the present invention is applied.

Fig. 15 is a cross-sectional view of a portion corresponding to XI-XI' of the seventh embodiment in an absorbent pad according to an eleventh embodiment of the absorbent article to which the present invention is applied.

Fig. 16 is an explanatory view for explaining a method of manufacturing the absorbent pad of Fig. 15 .

Fig. 17 is a perspective view of an absorbent pad to which a twelfth embodiment of the absorbent article of the present invention is applied.

FIG. 18 is a top view of the absorbent pad of FIG. 18. FIG.

Fig. 19 is a sectional view taken along line XIX-XIX' of Fig. 18 .

FIG. 20A is an enlarged view of part XX of FIG. 19 .

FIG. 20B is an explanatory view of the deformation of the XX portion in FIG. 19 .

Fig. 21 is a plan view showing a modified example of the absorbent pad to which the twelfth embodiment of the absorbent article of the present invention is applied.

Fig. 22 is a plan view showing a modified example of the absorbent pad to which the twelfth embodiment of the absorbent article of the present invention is applied.

Fig. 23 is a plan view showing a modified example of the absorbent pad to which the twelfth embodiment of the absorbent article of the present invention is applied.

Fig. 24 is a developed view of a disposable diaper to which the absorbent article of the present invention is applied.

Detailed ways

[first embodiment]

Hereinafter, a first embodiment of the present invention will be described in detail with reference to the drawings.

In this embodiment, for example, an absorbent article that can be used directly in underwear such as a sanitary napkin, or an internal absorbent that can be used as an absorbent article that is attached to a diaper or a diaper package such as a urine-absorbing pad. Absorbent pads used for sex articles are given as examples.

Fig. 1 is a perspective view of an absorbent pad to which the first embodiment of the absorbent article or inner absorbent article of the present invention is applied. Fig. 2 is a sectional view taken along line II-II' of Fig. 1 .

As shown in Figures 1 and 2, the absorbent pad 1 is composed of a liquid-permeable top sheet 2, a liquid-impermeable back sheet 3, an absorber 4, etc., and the liquid-permeable top sheet 2 is The contact surface with the human body is configured, the liquid-impermeable back sheet 3 is located on the side opposite to the top sheet 2, and is placed on the outer side during use and wearing, and the absorber 4 is arranged between the top sheet 2 and the back surface. Sandwiched between pieces 3.

The top sheet 2 is formed of a liquid-permeable nonwoven fabric so as to cover the surface side (skin contact surface side) of the absorber 4 .

As a material of the nonwoven fabric forming the top sheet 2, any of natural fibers and synthetic fibers can be used. Examples of natural fibers include cotton, cellulose (wood pulp), wool, silk, and the like. In addition, examples of synthetic fibers include polypropylene (PP), polyethylene (PE), nylon, polyester (PET), acrylic, etc. In addition, PE/PP blended non-woven fabrics, PE/PET blended non-woven fabrics, etc. can also be used. As the cloth, bicomponent fibers (mixed fibers) obtained by appropriately combining the above materials can also be used.

In addition, as a method of producing nonwoven fabrics from these fibrous materials, known methods can be suitably used, for example, any method such as chemical bonding, thermal bonding, and spunlace can be used. In addition, for synthetic fibers, etc. It can be produced by any one of the spunbond method, the melt blown method, and their combination with the above-mentioned bonding method.

The back sheet 3 is formed of a sheet having at least water cut-off properties such as polyethylene. In addition, from the viewpoint of preventing stuffy feeling, a moisture-permeable sheet is preferable, and as the sheet having water-cutting and moisture-permeable properties, a microporous sheet made of polyethylene or polyester is suitably used. Olefin-based resins such as propylene are melted and mixed with an inorganic filler to form a sheet, and then stretched in one or two axial directions.

In addition, an adhesive layer (not shown) is formed on the underpants contacting surface of the back sheet 3, and the absorbent pad 1 can be fixed without shifting from the underpants, diaper, or diaper package during use.

The back sheet 3 covers the bottom surface of the absorber 4, and covers the sides of the absorber 4, and at the upper longitudinal edge portions of the absorber 4, the folded-back starting point 31 is used as a starting point to fold back toward the top sheet 2 to form a folded-back portion 32.

The back sheet 3 and the top sheet 2 are bonded to each other in the vicinity of the folding starting point 31 by a hot-melt adhesive.

On the surface of the folded portions 32, 32 of the back sheet 3 opposite to the surface facing the top sheet 2, areas colored in a given color, that is, colored areas C, C, are provided. Specifically, for example, as shown in FIG. 1 , a colored area C is provided from the folded-back starting point 31 of the folded-back portion 32 to the colored end portion C1 at a predetermined position inside the folded-back portion 32 in the width direction. In addition, at a predetermined position inside the colored region C in the longitudinal direction, a substantially V-shaped colored cutout portion C2 is formed from the colored end portion C1 toward the turning-back starting point portion 31 . Furthermore, the colored region C of the folded portion 32 , the colored end portion C1 , and the colored notch portion C2 are made visually recognizable from the skin-contacting surface side of the absorbent pad 1 . The colored end portion C1 serves as a mark for alignment in the width direction corresponding to a diaper or a package of a diaper (not shown) provided on the absorbent pad 1 as an inner absorbent article to be worn. There are marks for alignment in the width direction on the top. Therefore, the position of the colored edge part C1 is set so that it may correspond to the mark for alignment of the width direction provided in the diaper or the package body (omission of illustration) of a diaper. The colored cutout portion C2 serves as a mark for alignment in the longitudinal direction corresponding to the longitudinal direction provided on the diaper or diaper package (not shown) to which the absorbent pad 1 is worn. The alignment marks for . Therefore, the position and number of objects of the colored notch part C2 are set so that it may correspond to the mark for alignment provided in the diaper or the package body (illustration omitted) of a diaper. The shape of the colored cutout portion C2 is not particularly limited.

In addition, the alignment marks in the longitudinal direction are not limited to the colored cutouts C2, and may be set by printing or attaching other members.

The absorber 4 is composed of a liquid-permeable crepe paper (not shown) covering an absorbent core (not shown) made of, for example, an absorbent material such as cotton or pulp, or a sheet such as fiber or film. It is formed by combining a shape substrate with a superabsorbent resin such as a superabsorbent polymer. Furthermore, the absorbent core may have a single-layer structure or a multi-layer structure.

Next, the three-dimensional gathers 6, 6 will be described. The three-dimensional gathers 6 are formed by attaching the gather sheet 5 made of nonwoven fabric to the folded portion 32 of the back sheet 3 . In detail, the three-dimensional gathers 6, as shown in FIG. And formed.

In addition, in the three-dimensional gathers 6, the elastic member 63 is arrange|positioned across the longitudinal direction, and is formed freely in the longitudinal direction.

The rising portion 61 of the three-dimensional gathers 6 is the same as the folding starting point 31 of the back sheet 3 and also the same as the bonding starting point 51 of the gather sheet 5 . Therefore, the base of the three-dimensional gathers 6, that is, the vicinity of the rising portion 61, is formed by two layers of the back sheet 3 and the gather sheet 5.

On the other hand, since the gather piece 5 extends longer than the folded-back portion 32, the vicinity of the free end 62 of the three-dimensional gather 6 is constituted by only one layer of the gather piece 5 .

That is, at the root of the three-dimensional gathers 6, that is, the standing portion 61, it is composed of the back sheet 3 and the gathers sheet 5; when in use, the part that is in contact with the skin, especially the part that rubs against the skin, that is, the free end of the three-dimensional gathers 6 62 near, only by the pleat sheet 5 constitutes.

And, as shown in Fig. 1, the three-dimensional gathers 6 are arranged substantially along the longitudinal side edges of the absorber 4 without fixing the free ends 62, but at both ends S of the longitudinal direction of the absorbent pad 1 , S, the free end 62 of the three-dimensional pleats 6 is folded toward the top sheet 2 and fixed on the top sheet 2.

The pleat sheet 5 is desirably a non-woven fabric impermeable to liquid, and either a single-layer non-woven fabric or a laminated non-woven fabric may be used.

Examples of the non-woven fabric impermeable to liquid include spunbond nonwoven fabric, spunbond nonwoven fabric-meltblown nonwoven fabric-spunbond nonwoven fabric, spunbond nonwoven fabric-meltblown nonwoven fabric-melt Spray non-woven fabric - spunbond non-woven fabric, hot-rolled non-woven fabric, liquid-impermeable non-woven fabric, air-laid non-woven fabric, etc.

In addition, as an adhesive for bonding the pleat sheet 5 and the back sheet 3 at this time, for example, ethylene vinyl acetate copolymer resin (EVA; Ethylene Vinyl Acetate), polyvinyl alcohol (PVA), acrylamide Polyvinyl alcohol copolymer, acrylate-vinyl acetate copolymer, sodium carboxymethylcellulose, styrene-based elastomers such as SIS, SBS, SIBS, SEPS, etc., polyester-acrylic elastomers, polyolefin-based elastomers, etc. .

In addition, as a method of applying the adhesive, known application methods such as curtain method, stirring method (bit method), narrow slot method, and spiral method (for example, spray coating or doctor blade coating, etc.) can be used. conduct.

According to the absorbent pad 1 of the first embodiment described above, since the free ends 62 of the three-dimensional gathers 6 are made of non-woven fabric, even if the three-dimensional gathers 6 come into contact with the human body during use, there is no tingling feeling, and it can be used. Improves the feeling of use and prevents skin discomfort.

In addition, by folding back the back sheet 3 toward the top sheet 2 side, the back sheet 3 covers the absorber 4 from the bottom surface to the side surface and a part of the top surface of the absorber 4, and three-dimensional folds are three-dimensionally formed by the back sheet 3 made of a liquid-impermeable sheet. The root of the pleats 6, that is, the erected portion 61.

Thereby, when body pressure is applied to the absorbent pad 1, bodily fluids pushed out from the absorber 4 can be prevented from seeping out from the base of the three-dimensional gathers 6 to the outside.

In addition, the three-dimensional gathers 6 can more reliably prevent leakage of bodily fluids by being composed of two layers of the back sheet 3 and the nonwoven fabric.

And the root portion of the three-dimensional gathers 6, that is, the rising portion 61, is continuously formed by the folded back sheet 3, and there is no need to set an adhesive region or the like for forming the rising portion 61 on the absorbent body 4. Sufficient water absorption area is ensured on the upper surface, which can smoothly absorb body fluids and prevent leakage of body fluids.

And, by pasting the non-woven fabric on the side opposite to the surface opposite to the top sheet 2 of the folded back sheet 3, that is, the skin contact surface, the folded back sheet 3 will not come into contact with the human body, and can be suppressed. Stimulating the skin while wearing not only improves the feeling of use, but also prevents skin discomfort.

In addition, since the absorber 4 is wrapped by a method called a roll top (front roll ki), there is no need to configure side flaps. As a result, the absorbent pad 1 does not shrink in the longitudinal direction, and can be smoothly attached to underwear, diapers, and diaper packages (not shown) during use.

Moreover, since the folded portion 32 of the back sheet 3 is formed on a diaper or a package (not shown) for the absorbent pad 1 and a colored region C corresponding to the alignment mark in the width direction and corresponding to the The marking for alignment in the longitudinal direction corresponds to the colored cutout C2, so that the absorbent pad 1 can be quickly and surely worn at appropriate positions in the widthwise and longitudinal directions of the diaper or diaper package (not shown). superior. Therefore, not only can the trouble of replacing the absorbent pad 1 be reduced, but also the movement during wearing can be prevented, and the leakage of bodily fluid can be reliably prevented.

[Second Embodiment]

Next, an absorbent pad 100 according to a second embodiment will be described with reference to FIG. 3 .

Fig. 3 is a cross-sectional view of an absorbent pad according to a second embodiment of the present invention.

The absorbent pad 100 shown in Fig. 3 is different from the absorbent pad 1 of the first embodiment in that the gathers 105 are different. Therefore, when describing the second embodiment, the same configurations as those of the above-mentioned first embodiment will be denoted by the same reference numerals and description will be omitted.

As shown in Figure 3, the gather sheet 105 that forms the three-dimensional gathers 106, 106 of the absorbent pad 100 completely covers the folded portion 32 of the back sheet 3, covers the side surface of the absorber 4, and bonds the starting point 151. It is bonded to the back sheet 3 so as to be located on the bottom surface side of the absorber 4 . That is, the inside of the width direction of the turning back starting point 31 of the turning back part 32 is used as the bonding starting point 151 to bond, so, compared with the first embodiment, the mounting area of the gather sheet 105 on the back sheet 3 is very large, Mounting can be performed with a sufficient area.

According to the absorbent pad 100 of the second embodiment described above, the back sheet 3 and the gather sheet 105 can be bonded in a sufficient area, thereby not only preventing leakage or penetration of bodily fluids more effectively, but also completely preventing leakage of bodily fluids. Since the back sheet 3 is in contact with the skin, it not only improves the usability, but also prevents skin discomfort.

[Third Embodiment]

Next, an absorbent pad 200 according to a third embodiment will be described with reference to FIG. 4 .

Fig. 4 is a sectional view of an absorbent pad according to a third embodiment of the present invention.

The absorbent pad 200 shown in FIG. 4 is different from the absorbent pad 1 of the first embodiment in terms of the top sheet 202 . Therefore, when describing the third embodiment, the same components as those in the above-mentioned first embodiment will be denoted by the same reference numerals and their description will be omitted.

As shown in FIG. 4 , the three-dimensional gathers 206 and 206 of the absorbent pad 200 are made of the top sheet 202 and the back sheet 3 . The back sheet 3 covers the bottom surface of the absorber 4 and covers the side surfaces of the absorber 4, and the upper longitudinal edge portions of the absorber 4 are folded back toward the top sheet 202 from the fold-back starting point 31 to form a fold-back portion 32.

On the other hand, the top sheet 202 is extended to cover both sides of the folded portion 32 of the back sheet 3 folded back to the top sheet 202 side, and the folding starting point 31 is used as the bonding starting point 251 to form three-dimensional gathers. 206.

That is, the three-dimensional gathers 206 are constituted by three layers of the back sheet 3 and the top sheet 202 sandwiching this sheet from both sides.

In this case, the region of the topsheet 202 covering the upper surface of the absorbent body 4 (ie, the body fluid-absorbing region) is liquid-permeable, and the region where the three-dimensional gathers 206 are formed is made more impermeable to liquid than the body-fluid-absorbing region. Specifically, a water-repellent treatment, a water-repellent treatment, or the like is given to the area where the three-dimensional gathers 206 are formed in the top sheet 202 . The area where the three-dimensional gathers 206 are formed is not only impermeable to liquid, but also has liquid impermeability.

As the liquid-permeable nonwoven fabric forming the body fluid absorbing region, the nonwoven fabrics mentioned in the description of the top sheet 2 can be used.

According to the absorbent pad 200 of the third embodiment, the three-dimensional gathers 206 are formed by the back sheet 3 and the top sheet 202, and the top sheet 202 encloses and covers both sides of the back sheet 3, so as to prevent the pleats from falling on the absorbent pad. When body pressure is applied at 200, the body fluid pressed out from the absorbent body 4 seeps out from the base of the three-dimensional gathers 206 to the outside.

In addition, by enclosing and covering the folded back sheet 3 with the top sheet 202, the folded back sheet 3 will not come into contact with the human body, and the stimulation to the skin during wearing can be suppressed, which not only improves the feeling of use, but also prevents skin discomfort.

In addition, the three-dimensional gathers 206 have the properties of cloth (cloth-like quality, properties of non-woven fabric/embossed composite material), and can be expected to give the user a soft feeling of use.

Moreover, the three-dimensional gathers 206 are composed of the liquid-impermeable back sheet 3 and an area that is more difficult to permeate liquid than the area on the upper surface of the absorber 4 of the top sheet 202, and can be more reliably Prevent leakage of body fluids.

[Fourth embodiment]

Next, an absorbent pad 300 according to a fourth embodiment will be described using FIG. 5 .

Fig. 5 is a sectional view of an absorbent pad according to a fourth embodiment of the present invention.

The absorbent pad 300 shown in FIG. 5 differs from the absorbent pad 200 of the third embodiment in that the top sheet 302 is different. Therefore, when describing the fourth embodiment, the same configurations as those of the above-mentioned third embodiment will be assigned the same reference numerals and their descriptions will be omitted.

As shown in FIG. 5 , the three-dimensional gathers 306 and 306 of the absorbent pad 300 are composed of the top sheet 302 and the back sheet 3 . The back sheet 3 covers the bottom surface of the absorber 4 and also covers the side surfaces of the absorber 4, and the upper longitudinal edge portions of the absorber 4 are folded back toward the top sheet 302 from the fold-back starting point 31 to form a fold-back portion 32.

On the other hand, the top sheet 202 extends to cover both sides of the folded portion 32 of the back sheet 3 folded back to the top sheet 302 side, and covers the side of the absorber 4, and covers the back of the bottom surface of the absorber 4. The bonding starting point 351 is provided on the sheet 3, whereby the three-dimensional gathers 306 are formed.

That is, the three-dimensional gathers 306 are constituted by three layers of the back sheet 3 and the top sheet 302 sandwiching this sheet from both sides.

In this case, the region of the top sheet 302 covering the upper surface of the absorbent body 4 (ie, the body fluid-absorbing region) is liquid-permeable, and the region where the three-dimensional gathers 306 are formed is made less permeable to liquid than the body-fluid-absorbing region. Specifically, a water-repellent treatment, a water-repellent treatment, or the like is applied to the area where the three-dimensional gathers 306 are formed in the top sheet 302 . As the liquid-permeable nonwoven fabric, the nonwoven fabrics given as examples of the top sheet 2 can be used.

According to the absorbent pad 300 of the fourth embodiment, the bonded area between the top sheet 302 and the back sheet 3 constituting the three-dimensional gathers 306 can be obtained in a larger area, so that leakage and seepage of bodily fluids can be prevented more effectively.

[Fifth Embodiment]

Next, an absorbent pad 400 according to a fifth embodiment will be described using FIG. 6 .

Fig. 6 is a cross-sectional view of an absorbent pad 400 according to a fifth embodiment of the present invention.

In the absorbent pad 400 shown in FIG. 6 , although the shapes of the top sheet 2 and the gathers 5 are not changed from those of the first embodiment, the arrangement of each sheet when forming the back sheet 403 and the three-dimensional gathers 406 different. Therefore, when describing the fifth embodiment, the same components as those in the above-mentioned first embodiment will be denoted by the same reference numerals and their description will be omitted.

As shown in FIG. 6 , the three-dimensional gathers 406 and 406 of the absorbent pad 400 are composed of the back sheet 403 and the gather sheet 5 . In the present embodiment, the gather sheet 5 is attached to the surface opposite to the top sheet 2 of the folded-back portion 432 of the back sheet 403 folded back starting from the fold-back starting point 431. side face. Specifically, the gather sheet 5 is attached to the back sheet 403 from the fold-back starting point 431 to the fold-back portion 432 to form three-dimensional gathers 406 .

In this case, a laminated nonwoven fabric composed of a liquid-impermeable film layer or an air-permeable nonwoven fabric layer is used for the back sheet 403 .

Here, the laminated nonwoven fabric refers to a nonwoven fabric called, for example, a layered nonwoven fabric in which a nonwoven fabric is laminated on a polyethylene sheet or the like.

Next, an example of a method of manufacturing the absorbent pad 400 will be described using FIG. 7 .

FIG. 7 is an explanatory diagram for explaining a method of manufacturing the absorbent pad 400 .

As shown in Figure 7, the absorber 4 is placed on the top of the back sheet 403, the top sheet 2 is placed on it, and on the top of the top sheet 2, it is positioned on the left and right sides of the top sheet 2. The gather sheet 5 is placed on the upper surface of the back sheet 403 outside the edge. Here, since the length (width) of the width direction of the top sheet 2 is smaller than the length (width) of the width direction of the back sheet 403, at both ends of the width direction of the back sheet 403, that is, at both longitudinal edge portions, The back sheet 403 and the gather sheet 5 are directly in contact with each other.

Next, the longitudinal both side edges of the top sheet 2 are folded back in the direction in which the gather sheet 5 is placed (upward direction). Simultaneously, the back sheet 403 and the gather sheet 5 are folded back toward the top sheet 2 side starting from the fold-back starting point 431 to form a fold-back portion 432 in a state of being overlapped. Furthermore, the folded-back part 432 is fixed to the gather piece 5, and the three-dimensional gather 406 is comprised.

According to the absorbent pad 400 of the fifth embodiment described above, since the laminated nonwoven fabric is used for the back sheet 403, the back sheet 403 has the properties of cloth, and can be expected to give the user a soft feeling of use.

[Sixth Embodiment]

Next, an absorbent pad 500 according to a sixth embodiment will be described with reference to FIG. 8 .

Fig. 8 is a cross-sectional view of an absorbent pad 500 according to a sixth embodiment of the present invention.

The absorbent pad 500 shown in FIG. 8 differs from the first embodiment in the shapes of the top sheet 502, the back sheet 503, and the gathers 505, and the arrangement of the sheets when three-dimensional gathers 506 are formed. Therefore, when describing the sixth embodiment, the same components as those in the above-mentioned first embodiment will be denoted by the same reference numerals and their description will be omitted.

As shown in FIG. 8 , the three-dimensional gathers 506 and 506 of the absorbent pad 500 are composed of a top sheet 502 , a back sheet 503 and a gather sheet 505 . In the present embodiment, the back sheet 503 includes, for example, a liquid-impermeable film layer. The top sheet 502 covers the both sides 4a, 4a in the longitudinal direction of the absorber 4, and the both sides 502a, 502a in the longitudinal direction of the top sheet 502 are fixed to the back sheet 503. In addition, the pleat sheet 505 is folded back from the folding starting point 505b, and the free end 562 of the three-dimensional gathers 506 is formed by folding back the starting point 505b. And, by attaching the end portion 505a (one end portion) folded back to the back sheet 503 side of the pleat sheet 505 on the folded portion 532 of the back sheet 503 that is folded back from the folded starting point portion 531 and facing the top sheet 502. On one side, the end 505c (the other end) of the pleat sheet 505 folded back toward the top sheet 502 and its vicinity are attached to the top sheet covering the longitudinal side 4a of the absorber 4. Three-dimensional gathers 506 are formed on the surface of the back sheet 502 opposite to the folded portion 532 of the back sheet 503 . Moreover, the elastic member 63 is arrange|positioned at the folding back starting point part 505b of the gather piece 505. As shown in FIG.

According to the absorbent pad 500 of the sixth embodiment described above, the pleats 505 are attached to both the back sheet 503 and the top sheet 502, so the pleats 505 can be fixed more reliably in the absorbent pad 500, and the reinforcement can be strengthened. The three-dimensional pleats 506 are effective in preventing leakage.

In addition, since the base of the three-dimensional gathers 506 is constituted by the back sheet 503, the gathers sheet 505, and the top sheet 502, leakage and seepage of bodily fluids can be more reliably prevented.

Furthermore, when body pressure is applied to the absorbent pad 500, bodily fluids pressed out of the absorbent body 4 can be prevented from leaking or seeping out from the base of the three-dimensional gathers 506 to the outside.

In addition, since the free end 562 of the three-dimensional pleats 506 is formed by the folded starting point 505b made of non-woven fabric that is difficult to permeate liquid, it can not only suppress the stimulation of the skin when wearing, improve the feeling of use, but also reduce the Skin discomfort.

In addition, the three-dimensional gathers 506 have the properties of cloth, and can be expected to give the user a soft feeling of use.

In addition, the gather piece 505 does not have to provide a clear folding back starting point 505b.

In addition, in the absorbent pad 500, as the absorbent pad 500a shown in FIG. Spaces D and D are provided between the top sheet 502 and the back sheet 503 in the longitudinal direction of both sides in the longitudinal direction of 504 .

Thereby, the bodily fluid overflowing from the absorber 504 can be diffused in the spaces D and D, so that not only the leakage of the bodily fluid to the outside can be prevented, but also the deodorizing effect can be enhanced.

[Seventh Embodiment]

Hereinafter, a seventh embodiment of the present invention will be described in detail with reference to the drawings.

In this embodiment, for example, an absorbent article used as an absorbent article worn directly in underwear like a sanitary napkin, or an inner absorbent article used as an absorbent article attached to a diaper or a package of a diaper like a urine-absorbent pad The absorbent sheet used will be described as an example.

Fig. 10 is a perspective view of an absorbent pad according to a seventh embodiment of the absorbent article or inner absorbent article to which the present invention is applied. Fig. 11 is a sectional view taken along line XI-XI' of Fig. 10 .

As shown in Figures 10 and 11, the absorbent pad 600 is composed of a liquid-permeable top sheet 602, a liquid-impermeable back sheet 603, an absorber 4, etc., and the liquid-permeable top sheet 602 is configured On the contact surface with the human body, the liquid-impermeable back sheet 603 is located on the side opposite to the top sheet 602, and is placed on the outer side during use and wearing, and the absorbent body 4 is sandwiched between the top sheet 602. And between the back sheet 603.

The top sheet 602 is formed of a liquid-permeable nonwoven fabric so as to cover the surface side (skin contact surface side) of the absorber.

As the material of the non-woven fabric forming the top sheet 602, for example, the same material as the multiple materials listed as the suitable material of the top sheet 2 can be adopted, The same manufacturing method as the manufacturing method is used for manufacturing.

In addition, the back sheet 603 can use the same material as the back sheet 3, and an adhesive layer (not shown) is formed on the underwear contact surface of the back sheet 603. When in use, the absorbent pad 600 can be attached to the underwear or diaper , the package body (not shown) of the diaper is fixed without displacement.

The back sheet 603 covers the bottom surface of the absorber and covers the sides of the absorber 4, and the upper longitudinal edge portions of the absorber 4 are folded back toward the top sheet 602 starting from the fold-back starting point 631 to form a fold-back portion 632. And, on the absorber 4 abutting surface side of the longitudinal both sides edges of the top sheet 602, the attaching portion 633 forming a part of the attaching folded portion 632 is formed by folding the attaching portion 633 toward the top sheet 602 side. Topsheet 602 is bonded to form bonded portion 634 .

The mounting portion 633 or the bonding portion 634 is formed by bonding each other with a hot-melt adhesive or the like.

The absorber 4 is composed of a liquid-permeable crepe paper (not shown) covering an absorbent core (not shown) made of, for example, an absorbent material such as cotton or pulp, or a sheet of fiber or film. The substrate is formed by combining a superabsorbent resin such as a superabsorbent polymer. Furthermore, the absorbent core may have a single-layer structure or may have a multi-layer structure.

Next, the three-dimensional gathers 606, 606 will be described. The three-dimensional gathers 606 have a folded portion 632 of the back sheet 603 and a gather sheet 605 made of a liquid-impermeable nonwoven fabric attached to the folded portion 632 . In detail, the three-dimensional gathers 606, as shown in FIG. installed to form.

Moreover, in the three-dimensional gathers 606, the elastic member 63 is arrange|positioned across the longitudinal direction, and is formed freely in the longitudinal direction.

The rising portion 661 of the three-dimensional gathers 606 is located on the inner side in the width direction of the folding starting point portion 631 of the back sheet 603 . The rising portion 661 forming the base of the three-dimensional gathers is formed by bonding the attaching portion 633 to the top sheet 602 . Therefore, it can be reliably fixed to the top sheet 602 and can follow the movement of the absorbent pad 600 .

On the other hand, since the gather piece 605 extends from the folded portion 632, the vicinity of the free end 662 of the three-dimensional gather 606 is constituted by only the gather piece 605.

That is, the root portion of the three-dimensional gathers 606, that is, the standing portion 661, is composed of the top sheet 602, the back sheet 603, and the gathers sheet 605, and the part that is in contact with the skin during use, especially the part that rubs against the skin, that is, the three-dimensional gathers 606. Near the free end 662 of the pleats, only the pleats 605 are formed.

Moreover, as shown in FIG. 10, the three-dimensional gathers 606 are arranged substantially along the longitudinal side edges of the absorber 4 without fixing the free ends 662, but at both ends S in the longitudinal direction of the absorbent pad 600. , S, the free ends 662 of the three-dimensional pleats 606 are folded toward the top sheet 602 and fixed on the top sheet 602 .

The gather sheet 605 is a non-woven fabric having water repellency.

In addition, as an adhesive for bonding the pleat sheet 605 and the back sheet 603 at this time, for example, ethylene vinyl acetate copolymer resin (EVA; Ethylene VinylAcetate), polyvinyl alcohol (PVA), acrylamide Polyvinyl alcohol copolymer, acrylate-vinyl acetate copolymer, sodium carboxymethylcellulose, styrene-based elastomers such as SIS, SBS, SIBS, SEPS, etc., polyester-acrylic elastomers, polyolefin-based elastomers, etc. .

In addition, as a method of applying the adhesive, known application methods such as curtain method, stirring method, slit method, and spiral method (for example, spray coating, doctor blade coating, etc.) can be used.

According to the absorbent pad 600 of the seventh embodiment described above, the bonding portion 634 is formed by bonding the attached portion 633 formed by the folded portion 632 and the top sheet 602 to the top sheet 602, thereby forming the three-dimensional gathers 606 The root of the pleats, that is, the standing portion 661 is firmly fixed to the top sheet 602, so the three-dimensional gathers 606 not only stand up firmly, but also have sufficient height to maintain the absorption performance, and can give the user a visual sense of security.

In addition, by fixing the bases of the three-dimensional gathers 606, lateral swelling can be suppressed, and the three-dimensional gathers 606 can be prevented from being extruded on the conveying line, thereby enabling easy conveyance.

Moreover, since the backsheet 603 covers the absorber 4 from the bottom surface of the absorber to the side surfaces and a part of the upper surface, and the base of the three-dimensional gathers 606 is three-dimensionally formed by the backsheet 603 made of a liquid-impermeable sheet, it is possible to prevent a When body pressure is applied to the sheet 600, the body fluid pressed out of the absorber 4 leaks or oozes from the base of the three-dimensional gathers 606 to the outside.

Moreover, since there are no side flaps, the absorbent pad 600 is not shortened in the longitudinal direction, and the absorbent pad 600 can be smoothly attached to underwear, diapers, or diaper packaging (not shown) during use.

[Eighth Embodiment]

Next, an absorbent pad 700 according to an eighth embodiment will be described with reference to FIG. 12 .

Fig. 12 is a cross-sectional view of an absorbent pad 700 according to an eighth embodiment of the present invention.

The absorbent pad 700 shown in FIG. 12 is different from the absorbent pad 600 of the seventh embodiment in terms of the gathers 705 . Therefore, when describing the eighth embodiment, the same reference numerals will be attached to the same configurations as those of the seventh embodiment described above, and description will be omitted.

As shown in FIG. 12, in the absorbent pad 700, the back sheet 603 covers the bottom surface and side surfaces of the absorber 4, and the upper longitudinal edge portions of the absorber face toward the top sheet 602 from the folding starting point 631. Fold back to form the folded portion 632, by attaching a part of the folded portion 632 on the side of the absorber 4 abutting surface of the longitudinal both sides of the top sheet 602, thereby forming the attached portion 633, and attaching the attached portion 633 to the The top sheet 602 is folded back on its side to be bonded to the top sheet 602 to form a bonding portion 634 .

Moreover, the gather sheet 705 forming the three-dimensional gathers 706, 706 of the absorbent pad 700 completely covers the folded-back portion 632 of the back sheet 603, and from the side surface of the absorber 4 to the bottom surface of the absorber 4, the bonding starting point 751 is located on the absorber. The bottom surface side of the body 4 is attached to the back sheet 603 . That is, the gather sheet 705 is attached with the widthwise inner side of the folding starting point 631 of the folding portion 632 as the bonding starting point 751. Therefore, compared with the seventh embodiment, the attachment area to the back sheet 603 becomes smaller. It is very large, and there is sufficient area for placement.

According to the absorbent pad 700 of the eighth embodiment described above, it is possible to have a sufficient area to bond the pleats 705 and the back sheet 603, thereby preventing leakage or seepage of body fluids more effectively. The back sheet 603 is prevented from being in contact with the skin, so not only the feeling of use is improved, but also the discomfort of the skin can be reduced.

[Ninth Embodiment]

Next, an absorbent pad 800 according to a ninth embodiment will be described with reference to FIG. 13 .

Fig. 13 is a cross-sectional view of an absorbent pad 800 according to a ninth embodiment of the present invention.

The absorbent pad 800 shown in FIG. 13 is different from the absorbent pad of the seventh embodiment in that the top sheet 802 is different. Therefore, when describing the ninth embodiment, the same configurations as those of the seventh embodiment will be assigned the same reference numerals and their description will be omitted.

As shown in FIG. 13 , the three-dimensional gathers 806 and 806 of the absorbent pad 800 are composed of the top sheet 802 and the back sheet 603 . The back sheet 603 covers the bottom surface of the absorber and also covers the side surfaces of the absorber 4. On the upper surface of the absorber 4, in the edge portions on both sides in the longitudinal direction, the back sheet 603 is folded back toward the top sheet 802 starting from the fold-back starting point 631 to form a fold-back. Section 632.

On the other hand, the top sheet 802 is extended to cover both sides of the folded portion 632 of the back sheet 603 folded back to the top sheet 802 side, and the folding starting point 631 is used as the bonding starting point 851 to form three-dimensional gathers 806 .

That is, the three-dimensional gathers 806 are composed of three layers of the back sheet 603 and the top sheet 802 sandwiching this sheet from both sides.

And, in the vicinity of the folding starting point 631 at the root of the three-dimensional gathers 806, the back sheet 603 wrapped and covered by the top sheet 802 is bonded to the top sheet 802 to form an adhesive portion 834 to fix the three-dimensional gathers 806. roots.

In this case, the region of the top sheet 802 that covers the upper surface of the absorber 4 (that is, the body fluid absorbing region) is liquid-permeable, and the region where the three-dimensional gathers 806 are formed is liquid-impermeable. As the liquid-permeable nonwoven fabric, the nonwoven fabric mentioned in the description of the top sheet 2 can be used, and as the liquid-impermeable nonwoven fabric, the nonwoven fabric mentioned in the description of the back sheet 603 can be used.

According to the absorbent pad 800 of the ninth embodiment, the three-dimensional gathers 806 are formed by the back sheet 603 and the top sheet 802 covering both sides of the back sheet 603. When body pressure is applied to the absorbent pad 800, It is possible to prevent the body fluid pressed from the absorbent body 4 from seeping out from the base of the three-dimensional gathers 806 to the outside.

Moreover, by covering the folded back sheet 603 with the top sheet 802, the folded back sheet 603 will not come into contact with the human body, and the stimulation to the skin during wearing can be suppressed. Reduce skin discomfort.

Furthermore, the three-dimensional gathers 806 are covered with the top sheet 802 made of nonwoven fabric, so they have the property of cloth, and can be expected to give the user a soft feeling of use.

In addition, by bonding the roots of the three-dimensional pleats 806 to the top sheet 802, not only the three-dimensional pleats 806 stand up firmly, have a sufficient height, maintain the absorption performance, but also give the user a visual sense of security.

Moreover, by fixing the roots of the three-dimensional gathers 806, the expansion of the three-dimensional gathers 806 to the width direction can be suppressed, and the three-dimensional gathers will not be extruded in the conveying line, and the shape of each product will not deviate, so that it can be easily to deliver.

Furthermore, the three-dimensional gathers 806 are composed of the liquid-impermeable back sheet 603 and the top sheet 802, and can more reliably prevent bodily fluid from seeping out.

[Tenth Embodiment]

Next, an absorbent pad 900 according to a tenth embodiment will be described with reference to FIG. 14 .

Fig. 14 is a cross-sectional view of an absorbent pad 900 according to a tenth embodiment of the present invention.

The absorbent pad 900 shown in FIG. 14 differs from the absorbent pad of the ninth embodiment in that the top sheet 902 is different. Therefore, when describing the tenth embodiment, the same components as those in the above-mentioned ninth embodiment will be assigned the same reference numerals and their descriptions will be omitted.

As shown in FIG. 14 , the three-dimensional gathers 906 and 906 of the absorbent pad 900 are composed of the top sheet 902 and the back sheet 603 . The back sheet 603 covers the bottom surface of the absorber 4 and also covers the side surfaces of the absorber 4, and at the upper vertical edge portions of the absorber 4, the folded back sheet 902 is formed starting from the folded starting point 631 to form the folded portion 632.

On the other hand, the top sheet 902 extends to cover both sides of the folded portion 632 of the back sheet 603 folded back toward the top sheet 902, and covers the side of the absorber 4. The back sheet 603 is provided with a bonding starting point 951 to form three-dimensional gathers 906 .

That is, the three-dimensional gathers 906 are composed of three layers of the back sheet 603 and the top sheet 902 covered by sandwiching the sheet, and are attached with the inner side in the width direction of the folding starting point 631 as the bonding starting point 951 .

And, at the root portion of the three-dimensional gathers 906, that is, the standing portion, in the vicinity of the folding starting point 631, the bonding portion 934 is formed by bonding the back sheet 603 covered by the top sheet 902 to the top sheet 902, The roots of the three-dimensional pleats 906 are fixed.

In this case, the region of the top sheet 902 that covers the upper surface of the absorber 4 (that is, the body fluid absorption region) is liquid-permeable, and the region where the three-dimensional gathers 906 are formed is liquid-impermeable. As the liquid-permeable nonwoven fabric, the nonwoven fabric exemplified as the top sheet 2 can be used, and as the liquid-impermeable nonwoven fabric, the nonwoven fabric exemplified as the back sheet 3 can be used.

According to the absorbent pad 900 of the tenth embodiment, the bonded area between the top sheet 902 and the back sheet 603 constituting the three-dimensional gathers 906 can be made larger, so that leakage or seepage of body fluids can be more effectively prevented.

[Eleventh Embodiment]

Next, an absorbent pad 1000 according to an eleventh embodiment will be described with reference to FIG. 15 .

Fig. 15 is a cross-sectional view of an absorbent pad 1000 according to an eleventh embodiment of the present invention.

In the absorbent pad 1000 shown in Fig. 15, the shapes of the top sheet 602 and the gathers 605 are not changed from those of the seventh embodiment, but the arrangement of each layer when forming the three-dimensional gathers 1006 is different. Therefore, when describing the eleventh embodiment, the same components as those in the above-mentioned seventh embodiment will be denoted by the same reference numerals and descriptions will be omitted.

As shown in FIG. 15 , the three-dimensional gathers 1006 and 1006 of the absorbent pad 1000 are composed of the back sheet 1003 and the gather sheet 605 . In the present embodiment, the gather sheet 605 is attached to the surface of the folded portion 1032 of the back sheet 1003 folded back from the folded starting point 1031 on the side opposite to the top sheet 602 . In detail, from the folding back starting point 1031 to the folding back portion 1032, the gather sheet 605 is attached to the back sheet 1003, and further attached to the absorber 4 abutting surface side of the top sheet 602, thereby forming the attachment portion 1033. .

And, in the vicinity of the folding starting point 1031 constituting the base of the three-dimensional gathers 1006, the sticking portion 1033 is bonded to the top sheet 602 to form an adhesive portion 1034 to fix the base of the three-dimensional gathers 1006.

At this time, a laminated nonwoven fabric composed of a liquid-impermeable film layer and an air-permeable nonwoven fabric layer is used for the back sheet 1003 . Here, the liquid-impermeable film layer is disposed on the absorber 4 side, and the air-permeable nonwoven fabric layer is positioned on the opposite side, that is, on the outside.

Here, the laminated nonwoven fabric refers to a nonwoven fabric called, for example, a layered nonwoven fabric in which a nonwoven fabric is laminated on a polyethylene sheet or the like.

Next, an example of the manufacturing method of the absorbent pad 1000 will be described using FIG. 16 .

FIG. 16 is an explanatory diagram for explaining a method of manufacturing the absorbent pad 1000 .

As shown in FIG. 16, the absorber 4 is placed on the upper surface of the back sheet 1003, and the top surface sheet 602 is placed thereon. Furthermore, on the upper surface of the top sheet 602, the gather sheet 605 is placed by the longitudinal left and right edge parts of the top sheet 602. As shown in FIG. Here, since the length (width) of the width direction of the top sheet 602 is formed to be smaller than the length (width) of the width direction of the back sheet 1003, at both ends of the width direction of the back sheet 1003, that is, at both longitudinal edges, part, the back sheet 1003 and the pleated sheet 605 directly abut against each other.

Next, the back sheet 1003 is folded back to the top sheet 602 side approximately along the longitudinal side edges of the absorber 4 with the folding starting point 1031 as a starting point to form a folded portion 1032, and the top sheet is attached to a part of the folded portion 1032. 602 on both sides of the vertical edge, thereby forming the mounting part 1033. At this time, the gather sheet 605 is sandwiched between the top sheet 602 and the back sheet 1003 . That is, as the attachment part 1033, it is set as the three-layer structure which consists of the top surface sheet 602, the gathers sheet 605, and the back surface sheet 1003 from inside.

Next, the mounting portion 1033 is folded back toward the top sheet 602 to bond the top sheets 602 to form the bonded portion 1034, thereby forming the three-dimensional or the root of the pleats 1006, that is, the standing portion 1061.

According to the absorbent pad 1000 of the eleventh embodiment described above, the back sheet 1003 has the properties of cloth, and can be expected to give the user a soft feeling of use.

[Twelfth Embodiment]

Next, an absorbent pad 1100 according to a twelfth embodiment will be described with reference to FIGS. 17 to 23 .

In this embodiment, for example, an absorbent article that can be used as an absorbent article worn directly in underwear like a sanitary napkin, or an inner absorbent article that can be attached to a diaper or a diaper package like a urine-absorbing pad An example of an absorbent sheet used as an article will be described.

Fig. 17 is a perspective view of an expanded absorbent pad 1100 according to the twelfth embodiment. In addition, Fig. 18 is a plan view of the absorbent pad 1100, and Fig. 19 is a cross-sectional view taken along line XIX-XIX' of Fig. 18 .

As shown in FIGS. 17 to 19 , an absorbent pad 1100 as an absorbent article includes an absorbent pad body 1110 , a pair of left and right gathers 1111 , 1111 , and the like.

The absorbent pad body 1110 is composed of a liquid-permeable top sheet 1110a, a liquid-impermeable back sheet 1110b, and an absorber 1112; Body fluids such as urine permeate quickly; the liquid-impermeable backsheet 1110b is disposed on the opposite side of the contact surface with the human body; and the absorber 1112 is sandwiched between the backsheet 1110b and the topsheet 1110a.

In addition, in this absorbent pad main body 1110, an abdominal part 1114 is formed at one end and a back part 1115 is formed at the other end so as to cover the crotch of the human body from the abdominal side to the back side. In addition, a crotch portion 1116 is formed between the abdominal portion 1114 and the back portion 1115 .

The top sheet 1110a is formed of a porous or non-porous nonwoven fabric, a porous plastic sheet, or the like. As the material of the nonwoven fabric forming the top surface sheet 1110a, the same material as the multiple materials listed as the suitable material of the top surface sheet 2 can be adopted, and as the manufacturing method of the nonwoven fabric, for example, the same top surface sheet 2 can be used. The manufacturing method is the same as the manufacturing method.

When a plurality of through holes are formed in the top sheet 1110a, bodily fluids are absorbed more quickly and dryness is excellent.

The back sheet 1110b is formed of a sheet having at least water cut-off properties such as polyethylene. As the back sheet 1110b, for example, the same material as that of the back sheet 3 can be used.

As shown in Figure 19, the ends of the width direction of the back sheet 1110b are folded back to the inside of the back sheet 1110b and laminated, and at the same time, the folded portion 100b of the back sheet 1110b is formed with a coating adhesive. Adhesive-coated areas where adhesive is applied, and adhesive-non-coated areas where no adhesive is applied.

Specifically, the ends in the width direction of the back sheet 1110b are folded back inwardly of the back sheet 1110b, and are sandwiched by the top sheet 1110a. Furthermore, the folded portion 100b of the folded back sheet 1110b has an adhesive layer 20 made of a hot-melt adhesive as an adhesive application area, and bonds the folded back and laminated back sheets 1110b.

Ends in the width direction of the back sheet 1110b may be folded back toward the back side opposite to the top sheet 1110a.

Here, in the band-shaped region where the folded back sheet 1110b is folded in the folded portion 100b of the back sheet 1110b and includes the folded portion 100d as the folded starting point, an adhesive layer without an adhesive is formed. In the adhesive non-applied region 21, the back sheet 1110b is not bonded to each other in the bent portion 100d. That is, the adhesive non-applied region 21 is provided in a belt shape across the longitudinal direction of the back sheet 1110b, including the folded portion 100d as the folding starting point.

As shown in FIG. 18 , the adhesive layer 20 is provided from the abdominal side 1114 to the back side 1115 of the absorbent pad main body 1110 without being disposed in the bent portion 100d of the back sheet 1110b.

The absorber 1112 absorbs water-like components such as urine which is body fluid when the absorbent pad 1100 is used, and can be formed using, for example, the same material as the absorber 4 .

The absorber 1112 is formed to have a length from the abdominal part 1114 side to the back part 1115 side of the absorbent pad main body 1110, and the central side in the longitudinal direction of the absorber 1112 is formed to be wider than both ends of the absorber 1112. narrow. That is, the substantially central portion of the absorber 1112, that is, the portion corresponding to the crotch portion 1116, is wider than the two end portions in the longitudinal direction of the absorber 1112, that is, the portion corresponding to the abdominal portion 1114 or the back portion 1116. It is narrow and shaped like an hourglass.

In this way, by making the approximate central portion of the absorber 1112, that is, the width of the portion corresponding to the crotch portion 1116, narrower than both ends in the longitudinal direction, the absorbent pad 1100 (absorbent pad body 1110) can be worn on the human body. When put on, the absorbent body 1112 is likely to be closely attached to the human body at the crotch portion (groin portion) of the human body.

In the back sheet 1110b folded back toward the top sheet 1110a side in the absorbent pad main body 1110, gather sheets 1111, 1111 are provided from the abdominal side part 1114 to the back side part 1115. The pleated sheets 1111, 1111 are formed by folding a liquid-impermeable sheet in half, and fixing the folded surfaces by, for example, heat-melting or heat-sealing. In the gathered sheet 1111, the end on the folded-back side of the liquid-impermeable sheet folded in half is a free end 1111a, and the end fixed to the back sheet 1110b is a fixed end 1111b.

On the free end portion 1111a of the gather piece 1111, a plurality of elastic members 18, such as linear rubber or polyurethane fibers, are provided substantially parallel to the longitudinal direction of the gather piece 1111. Three-dimensional gathers are formed by erecting the free end portion 1111a from the absorbent pad main body 1110 in a state where the gather pieces 1111, 1111 are fixed to the absorbent pad main body 1110. And, by means of the elastic member 18, the three-dimensional gathers are formed into a structure that conforms to the body shape of the wearer, can be freely deformed in stretch and contraction, and is easily closely joined to the wearer.

In the folded-back portion 100b where the gather piece 1110b is folded back, the fixed end portion 1111b of the gather piece 1111 is fixed to the surface opposite to the top surface piece 1110a side.

In this way, since the pleated sheets 1111, 1111 which are arranged upright on the surface of the top sheet 1110a side are provided on the edge of the width direction of the absorbent pad main body 1110, the discharged bodily fluids that do not flow from the top sheet 1110a is completely absorbed into the absorber 1112 and the body fluid flowing out to the edge side of the width direction of the absorbent pad main body 1110 is once blocked by the pleats 1111, so that the liquid flow is diffused in the longitudinal direction, etc., and is directed toward the absorber 1112. Absorption, thereby, the effect of preventing lateral leakage of bodily fluid can be expected.

In particular, since the pleats 1111 are fixed on the folded portion 100b where the back sheet 1110b is folded back toward the top sheet 1110a, the back sheet 1110b can block bodily fluids together with the pleats 1111, thereby further preventing lateral leakage of bodily fluids.

Next, regarding the arrangement, that is, in the back sheet 1110b of the absorbent pad 1100, the adhesive non-applied region is provided in such a manner that the bent portion 100d of the back sheet 1110b does not have the adhesive layer 20 21. The effect of the adhesive layer 20 bonding the folded portion 100b of the back sheet 1110b to the portion where the folded portion 100b is folded and stacked, and not bonding the back sheet 1110b at the end side of the folded portion 100d will be described.

When the absorbent pad 1100 is used to wear the absorbent pad 1100 on the human body, the ends in the width direction of the crotch portion 1116 of the absorbent pad 1100 are in contact with the groin (thigh) of the human body.

At this time, as shown in FIG. 20A , a force in the arrow direction in the figure acts on the bent portion 100d of the folded portion where the back sheet 1110b is folded back.

In this way, when a force is applied to the bent portion 100d, as shown in FIG. 20B , the unbonded bent portion 100d between the back sheets 1110b expands in a ring shape in cross-sectional view. Thus, in the crotch portion 1116 of the absorbent pad 1100, the end portion in contact with the human body, that is, the bent portion 100d is rounded, and at the same time, the contact area with the human body is enlarged. That is, the elastically deformed bending portion 100d (back sheet 1110b ), which becomes ring-shaped in cross-sectional view, makes contact with the human body soft.

In this way, when the human body wears the absorbent pad 1100, the end (bending portion 100d) in contact with the human body in the crotch portion 1116 of the absorbent pad 1100 is elastically deformed into a ring shape when viewed in cross-section, thereby becoming relatively flat. The absorbent pad 1100 having the above-mentioned bent portion 100d can be used as an absorbent pad with a good wearing feeling because it comes into soft contact with the human body.

In particular, by forming the width of the portion corresponding to the crotch portion 1116 of the absorbent body 1112 of the absorbent pad 1100 narrower than both ends in the longitudinal direction thereof, it is formed so that it is easy to fit the crotch portion (groin portion) of the human body. Because of the tight fitting shape, a better wearing feeling can be obtained.

The method of disposing the adhesive for elastically deforming the end portion of the crotch portion 1116 of the absorbent pad 1100 that contacts the human body, that is, the bent portion 100d in a cross-sectional view, into a ring shape is not limited to that shown in FIG. 18 above. In such an embodiment, it is only necessary not to provide an adhesive in a portion corresponding to a portion where the width of the absorber 1112 is narrowed in the bent portion 100d where the back sheet 1110b is bent.

For example, as shown in FIG. 21 , the adhesive non-applied region 21 may be provided at least at a position corresponding to a portion where the width of the absorber 1112 is narrowed and included in the folded-back starting point of the folded-back portion 100b. , that is, the position of the bending portion 100d. Specifically, the portion (turned-back portion 100b) for folding back and stacking the end portion of the back sheet 1110b in the width direction of the absorbent pad 1100a may be bonded with an adhesive between the back sheet 1110b so as to be in contact with the absorbent sheet 1100a. The abdominal side part 1114 and the back side part 1115 of the pad body 1110 are provided on the entire surface of the laminated back sheet 1110b, and the crotch part 1116 is formed at a narrower portion than the width of the absorbent body 1112. The corresponding position is not arranged on the bent portion 100d of the back sheet 1110b, and the adhesive layer 20a is provided as an adhesive application area such that it is arranged in a straight line from the abdominal portion 1114 to the back portion 1115. , At the same time, an adhesive non-coating region 21a is provided.

In addition, as shown in FIG. 22, the adhesive non-applied region 21b may be formed from the folded back starting point, that is, the folded portion at a position corresponding to the portion where the width of the absorber 1112 is narrowed. 100d to the absorber 1112 provided. Specifically, the portion (turned-back portion 100b) for bonding the back sheet 1110b at the end of the width direction of the back sheet 1110b in the absorbent pad 1100b to be folded back and laminated is only in contact with the absorbent liner. The abdominal part 1114 and the back part 1115 of the pad main body 1110 are arranged on the entire surface of the laminated and superimposed back sheet 1110b, and the adhesive layer 20b as an adhesive application area is provided in this way, and at the same time , an adhesive non-coating region 21b is provided.

In addition, as shown in FIG. 23, the adhesive non-applied region 21c may be formed from the folded starting point, that is, the folded portion at the position corresponding to the portion where the width of the absorber 1112 is narrowed. 100d is provided to the front part of the absorber 1112. Specifically, the portion (turned-back portion 100b) for folding back and stacking the end portion of the back sheet 1110b in the width direction of the absorbent pad 1100c may be bonded with an adhesive between the back sheet 1110b so as to be in contact with the absorbent sheet 1100c. The abdominal side part 1114 and the back side part 1115 of the pad body 1110 are provided on the entire surface of the laminated back sheet 1110b, and the crotch part 1116 is formed at a narrower portion than the width of the absorbent body 1112. The corresponding position is not arranged on the bent portion 100d of the back sheet 1110b, and it is arranged from the abdominal portion 1114 to the back portion 1115 and from the folded starting point, that is, the bent portion 100d is bent inwardly. The adhesive layer 20c, which is an adhesive application area, is also provided with an adhesive non-application area 21c.

In the above embodiments, for example, an absorbent article that can be used directly in underwear like a sanitary napkin, or an internal absorbent article that can be used as a diaper or a diaper package like a urine-absorbing pad. An example of an absorbent pad used in a sexual article has been described, but the present invention is not limited thereto, and can be suitably applied to, for example, disposable paper diapers, which are absorbent articles that can be used as they are.

Specifically, all the embodiments of the first to twelfth embodiments can be suitably applied to, for example, as shown in FIG. The liquid-impermeable back sheet 1201b positioned on the opposite side of the top sheet 1201a and the diaper main body 1201 composed of an absorber 1201c sandwiched between the top sheet 1201a and the back sheet 1201b are provided with An absorbent article such as a diaper 1200 is configured by holding the waist portion 1202 of the diaper main body 1201 for the waist of the wearer, and the fastening portion 1203 provided between the waist portion 1202 and fastened between the waist portions 1202 .

Industrial Applicability

The present invention can be utilized in the manufacture of absorbent articles.

Explanation of reference signs

1, 100, 200, 300, 400, 500, 500a, 600, 700, 800, 900, 1000, 1100, 1100a, 1100b, 1100c Absorbent pad (absorbent article, inner absorbent article)

2, 202, 302, 502, 602, 802, 902, 1110a top sheet

3, 403, 503, 603, 1003, 1110b back sheet

4, 504, 1112 absorber

5, 105, 505, 605, 705, 1111 pleats

6, 106, 206, 306, 406, 506, 606, 706, 806, 906, 1006 three-dimensional pleats

31, 431, 531, 631, 1031, 100d Turn back to the starting point

32, 432, 532, 632, 1032, 100b turning back

51, 151, 251, 351, 751, 851, 951 Bonding starting point

61, 661, 1061 Standing parts

62, 562, 662 free end

C2 Colored incision

D Space Department

Claims (22)

1. An absorbent article comprising: a liquid-permeable top sheet positioned on a face that contacts a human body, a liquid-impermeable back sheet positioned on a face opposite to the top sheet, and An absorbent body sandwiched between said top sheet and said back sheet; characterized in that, The three-dimensional pleats are formed by a turn-back portion and at least a part of the non-woven fabric attached to the turn-back portion. The turn-back portion is to extend the back sheet to the top surface approximately along the longitudinal side edges of the absorber. Folded sideways, The free ends of the three-dimensional pleats are made of the non-woven fabric. 2. The absorbent article according to claim 1, wherein the nonwoven fabric is attached to the surface of the folded portion opposite to the surface facing the top sheet. 3. The absorbent article according to claim 2, wherein the nonwoven fabric is attached to the back sheet with the inner side in the width direction of the folding starting point of the folding portion as the bonding starting point. . 4. The absorbent article according to claim 1, wherein the nonwoven fabric is attached to a surface of the folded portion facing the top sheet. 5. The absorbent article according to claim 1, wherein the nonwoven fabric is attached to the top sheet. 6. An absorbent article comprising: a liquid-permeable top sheet positioned on a face that contacts a human body, a liquid-impermeable back sheet positioned on a face opposite to the top sheet, and An absorbent body sandwiched between said top sheet and said back sheet; characterized in that, The top sheet is extended to cover both sides of the folded portion of the back sheet in an enveloping manner, thereby forming three-dimensional gathers, wherein the folded portions of the back sheet are approximately along the longitudinal side edges of the absorber to both sides. Fold back the top sheet side up. 7. The absorbent article according to claim 6, wherein a region of the top sheet positioned above the absorbent body is liquid-permeable, and a region covering the back sheet is formed to be wider than the region positioned on the absorbent body. The upper region of the body is more impermeable to liquids. 8. An absorbent article, comprising: a liquid-permeable top sheet positioned on a surface in contact with a human body; a liquid-impermeable back sheet positioned on a surface opposite to the top sheet; The absorbent body interposed between the top sheet and the back sheet, and the three-dimensional gathers erected on the top sheet side and at both longitudinal edges of the absorbent body; it is characterized in that, Formed with a folded part, a mounting part and an adhesive part, The folded portion is formed by folding the back sheet toward the top sheet side approximately along both longitudinal side edges of the absorber, The attaching portion attaches a part of the folded-back portion to both longitudinal side edges of the top sheet, The bonding part folds the attaching part back toward the top sheet side and adheres to the top sheet, At least a part of the three-dimensional gathers is constituted by the folded-back portion. 9. The absorbent article according to claim 8, wherein the three-dimensional gathers are formed by the folded portion and at least a part of a liquid-impermeable nonwoven fabric attached to the folded portion, The free ends of the three-dimensional pleats are made of the liquid-impermeable nonwoven fabric. 10. The absorbent article according to claim 9, wherein the liquid-impermeable nonwoven fabric is attached to the side of the folded portion opposite to the surface facing the top sheet. face. 11. The absorbent article according to claim 10, wherein the liquid-impermeable non-woven fabric is attached on the inner side in the width direction of the folding starting point of the folding portion as the bonding starting point. on the back sheet. 12. The absorbent article according to claim 9, wherein the back sheet is made of a laminated nonwoven fabric, The liquid-impermeable non-woven fabric is attached to a surface of the folded portion opposite to the top sheet. 13. An absorbent article comprising: a liquid-permeable top sheet positioned on a surface that contacts a human body, a liquid-impermeable back sheet positioned on a surface opposite to the top sheet, and The absorbent body interposed between the top sheet and the back sheet, and the three-dimensional gathers erected on the top sheet side and at both longitudinal edges of the absorbent body; it is characterized in that, The three-dimensional gathers are formed by extending the top sheet to cover both sides of the folded portion of the back sheet. The top panel side is folded back, Adhesive portions are formed approximately along the longitudinal side edges of the absorber in the vicinity of the folding starting point of the folding portion, and the bonding portion is folded back toward the top sheet to bond the top sheet. Knot. 14 . The absorbent article according to claim 13 , wherein a region of the top sheet positioned above the absorber is liquid-permeable, and a region covering the back sheet is liquid-impermeable. 15. An inner absorbent article comprising: a liquid-permeable top sheet positioned on a surface in contact with a human body, a liquid-impermeable back sheet positioned on a surface opposite to the top sheet, and an absorbent body sandwiched between said top sheet and said back sheet; characterized in that, The three-dimensional pleats are formed by the folded part and the non-woven fabric. The folded part is formed by folding the back sheet toward the top sheet side along the longitudinal side edges of the absorber. The non-woven fabric The cloth is attached on the surface of the folded portion opposite to the surface opposite to the top surface sheet, and is attached with the inner side of the folded starting point in the width direction of the folded portion as the starting point for bonding. On the back sheet, The free ends of the three-dimensional pleats are made of the non-woven fabric. 16. An inner absorbent article comprising: a liquid-permeable top sheet positioned on a surface in contact with a human body, a liquid-impermeable back sheet positioned on a surface opposite to the top sheet, and an absorbent body sandwiched between said top sheet and said back sheet; characterized in that, The three-dimensional pleats are formed by the folded part and the non-woven fabric. The folded part is formed by folding the back sheet toward the top sheet side along the longitudinal side edges of the absorber. The non-woven fabric One end in the longitudinal direction of the cloth is attached to the surface of the folded-back portion opposite to the top sheet, and the other end in the longitudinal direction of the nonwoven fabric is attached to the top sheet, The free ends of the three-dimensional pleats are made of the non-woven fabric. 17. The inner absorbent article according to claim 16, wherein the nonwoven fabric is folded back, and the free ends of the three-dimensional gathers serve as a starting point of folding back of the nonwoven fabric. 18. An inner absorbent article comprising: a liquid-permeable top sheet located on a surface in contact with a human body, a liquid-impermeable back sheet located on a surface opposite to the top sheet, and an absorbent body sandwiched between said top sheet and said back sheet; characterized in that, Three-dimensional gathers are formed by extending the top sheet to cover both sides of the folded portion of the back sheet. The dough side is folded back. 19. The inner absorbent article according to any one of claims 15 to 18, wherein a mark for alignment in the longitudinal direction is formed on the folded portion of the back sheet. 20. The inner absorbent article according to any one of claims 15 to 19, wherein the top sheet and the top sheet along the longitudinal direction are on both sides of the absorbent body in the longitudinal direction. A space is provided between the back sheets. 21. An inner absorbent article comprising: a liquid-permeable top sheet positioned on a surface in contact with a human body, a liquid-impermeable back sheet positioned on a surface opposite to the top sheet, The absorbent body sandwiched between the top sheet and the back sheet, and the three-dimensional gathers erected on the side of the top sheet and at both longitudinal edges of the absorbent body; it is characterized in that , forming a folded part, a mounting part and a bonding part, The folded portion is formed by folding the back sheet toward the top sheet side substantially along both longitudinal side edges of the absorber, The attaching portion attaches a part of the folded-back portion to both longitudinal side edges of the top sheet, The bonding part folds the attaching part back toward the top sheet side and adheres to the top sheet, At least a part of the three-dimensional gathers is constituted by the folded-back portion. 22. An inner absorbent article comprising: a liquid-permeable top sheet positioned on a surface in contact with a human body, a liquid-impermeable back sheet positioned on a surface opposite to the top sheet, The absorbent body sandwiched between the top sheet and the back sheet, and the three-dimensional gathers erected on the side of the top sheet and at both longitudinal edges of the absorbent body; it is characterized in that , The three-dimensional gathers are formed by extending the top sheet to cover both sides of the folded portion of the back sheet. The top panel side is folded back, Adhesive portions are formed approximately along the longitudinal side edges of the absorber in the vicinity of the folding starting point of the folding portion, and the bonding portions are folded back toward the top sheet to bond the top sheet. Knot.

Images