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WO2013161734A1 - Disposable diaper - Google Patents

Disposable diaper Download PDF

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Publication number
WO2013161734A1
WO2013161734A1 PCT/JP2013/061727 JP2013061727W WO2013161734A1 WO 2013161734 A1 WO2013161734 A1 WO 2013161734A1 JP 2013061727 W JP2013061727 W JP 2013061727W WO 2013161734 A1 WO2013161734 A1 WO 2013161734A1
Authority
WO
WIPO (PCT)
Prior art keywords
surface layer
lateral direction
disposable diaper
contact surface
longitudinal direction
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2013/061727
Other languages
French (fr)
Japanese (ja)
Inventor
響 菊池
慶 若杉
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Unicharm Corp
Original Assignee
Unicharm Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Unicharm Corp filed Critical Unicharm Corp
Publication of WO2013161734A1 publication Critical patent/WO2013161734A1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00—Bandages or dressings; Absorbent pads
    • A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/45—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the shape
    • A61F13/49—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the shape specially adapted to be worn around the waist, e.g. diapers, nappies
    • A61F13/494—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the shape specially adapted to be worn around the waist, e.g. diapers, nappies characterised by edge leakage prevention means
    • A61F13/49406—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the shape specially adapted to be worn around the waist, e.g. diapers, nappies characterised by edge leakage prevention means the edge leakage prevention means being at the crotch region
    • A61F13/49413—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the shape specially adapted to be worn around the waist, e.g. diapers, nappies characterised by edge leakage prevention means the edge leakage prevention means being at the crotch region the edge leakage prevention means being an upstanding barrier
    • A61F13/4942—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the shape specially adapted to be worn around the waist, e.g. diapers, nappies characterised by edge leakage prevention means the edge leakage prevention means being at the crotch region the edge leakage prevention means being an upstanding barrier the barrier not being integral with the top- or back-sheet
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00—Bandages or dressings; Absorbent pads
    • A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/51—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the outer layers of the pads
    • A61F13/511—Topsheet, i.e. the permeable cover or layer facing the skin
    • A61F13/51104—Topsheet, i.e. the permeable cover or layer facing the skin the top sheet having a three-dimensional cross-section, e.g. corrugations, embossments, recesses or projections
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00—Bandages or dressings; Absorbent pads
    • A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/51—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the outer layers of the pads
    • A61F13/515—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the outer layers of the pads characterised by the interconnection of the topsheet and the backsheet
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00—Bandages or dressings; Absorbent pads
    • A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/53—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium
    • A61F13/539—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium characterised by the connection of the absorbent layers with each other or with the outer layers

Definitions

  • This invention relates to a disposable diaper.
  • FIG. 3 of JP 2010-94535 A (JP 2010-94535A, Patent Document 2) describes an example of a surface layer of a napkin that has a ridge and a groove.
  • the flange portion and the groove portion extend in one direction in parallel with each other, and a large number of holes are formed in the groove portion.
  • a liquid-permeable body side liner wearing sheet
  • the color of excrement absorbed by the body is easily seen through a thin groove portion or an opening formed in the groove portion.
  • a liquid permeable second surface layer is interposed between the body side liner and the absorbent structure.
  • the object of the present invention is to provide an improved form of use of the body side liner and the second surface layer.
  • the present invention has a longitudinal direction, a lateral direction, and a thickness direction, and is interposed between a liquid-permeable body-side liner and a liquid-impervious outer cover.
  • the present invention relates to a disposable diaper including a structure.
  • the body side liner includes a first surface layer extending from a peripheral edge of the absorbent structure in the longitudinal direction and the lateral direction, and the absorbent structure body and the first surface layer inside the peripheral edge in the lateral direction. And a second surface layer joined to the first surface layer, and the first and second surface layers are formed of a thermoplastic synthetic fiber subjected to a hydrophilic treatment.
  • the first surface layer has a contact surface with respect to the skin of the wearer of the diaper and a non-contact surface that is the opposite surface, and the contact surface has a plurality of portions extending substantially parallel to each other in the longitudinal direction.
  • the ridges of the strips and the grooves between the ridges adjacent in the lateral direction are located, and the non-contact surface is formed flat.
  • both surfaces facing the non-contact surface and the absorption structure are formed flat.
  • the second surface layer has an inner region located in the center in the lateral direction joined to the first surface layer via an adhesive, and outer regions located on both sides outside the inner region in the lateral direction. It joins to the 1st surface layer by a plurality of 1st pressing parts pressed together with 1 surface layer.
  • the first surface layer and the second layer formed of thermoplastic synthetic fibers subjected to hydrophilic treatment Including surface layer. Since the density of the second surface layer is higher than that of the first surface layer, the movement of body fluid in the direction from the first surface layer toward the absorption structure can be promoted.
  • a 2nd surface layer while the inner side area located in the center of the horizontal direction in a diaper joins to the 1st surface layer via an adhesive agent, both the outer side areas in a horizontal direction join to the 1st surface layer in the 1st pressing part.
  • the density of the first and second surface layers located in the outer region is higher than the density of the first and second surface layers located in the inner region, and the body fluid flowing in the lateral direction in the first surface layer is located in the outer region. It can be absorbed quickly.
  • the first surface layer is formed in a portion located on the outer side in the lateral direction from the second surface layer, and when the second pressing portion is densified, when the portion touches the skin of the wearer, the skin of the diaper wearer The body fluid flowing in the lateral direction of the diaper along the path can be absorbed and the body fluid can be prevented from leaking from the diaper.
  • the partially broken top view of the disposable diaper which concerns on this invention.
  • wire cut surface of FIG. The figure which shows an example of the distribution state of a pressing part.
  • FIG. 1 is a partially broken plan view of a disposable diaper 1.
  • the diaper 1 is an open type, and has a vertical direction A, a horizontal direction B, and a thickness direction C (see FIG. 2) indicated by double-headed arrows.
  • the diaper 1 also has a liquid-permeable body-side liner 2, a liquid-impervious outer cover 3, and a body fluid absorbing structure 4 interposed therebetween.
  • a front waistline region 7, a rear waistline region 8, and a crotch region 6 interposed between the both waistline regions 7 and 8 are located. Both side edges 11 of the crotch region 6 are curved inward in the lateral direction B.
  • a leg-hole elastic body 12 extending in an extended state is joined to at least one of the side sheet 5 and the outer cover 3 via a hot melt adhesive (not shown).
  • Tape fasteners 14 are attached to both side edge portions 13 of the rear waistline region 8 to releasably connect the front and rear waistline regions 7 and 8.
  • waist elastic bodies 7a and 8a extend in the lateral direction B in an extended state, and the first surface layer It is fixed to at least one of 2a and the outer cover 3 via a hot melt adhesive (not shown).
  • the body side liner 2 shown in a broken state is interposed between a first surface layer 2a that comes into contact with the skin of a diaper wearer (not shown), and between the first surface layer 2a and the absorbent structure 4.
  • Second surface layer 2b is formed of staples of thermoplastic synthetic fibers 52a (see FIG. 7) subjected to hydrophilic treatment
  • the second surface layer 2b is formed of staples or filaments of thermoplastic synthetic fibers (not shown) subjected to hydrophilic treatment. Is formed.
  • the outer cover 3 is joined.
  • the second surface layer 2b is located on the inner side of the peripheral edge 4a of the absorbent structure 4 and is symmetrical with respect to a center line PP that bisects the dimension of the diaper 1 in the lateral direction B, and is illustrated by an imaginary line.
  • the outer zone 53 surrounding the inner region 52 is in close contact with the first surface 2a in the compressing portion 55 formed in a dot shape Or it joins in the state fuse
  • intermittent or hot melt adhesive Ad 2 is in the longitudinal direction A and / or transverse direction B Partly applied.
  • the fiber which forms both layers 2a and 2b is mechanically entangled mutually.
  • the outer region 53 is located on the entire second surface layer 2b and consists of both side regions and both end regions.
  • the inner region 52 is a central region in the lateral direction B in the second surface layer 2b, and in the longitudinal direction A, the inner region 52 preferably extends to a region where diaper wearer urination is assumed. Therefore, the second surface layer 2b when the dimension of the second surface layer 2b in the longitudinal direction A is considerably smaller than that of the absorbent structure 4 is mostly larger than the lateral center line QQ of the diaper 1. It is preferable to be located on the front side in the vertical direction.
  • the second surface layer 2b preferably has a longitudinal dimension A in the range of 50-150 mm and a lateral dimension B in the range of 30-100 mm.
  • the “inner region 52” and the “outer region 53” refer to respective regions when the diaper according to the present embodiment is viewed from the lateral direction B.
  • the pressing part 55 when the pressing part 55 is formed with respect to the 1st surface layer 2a, the 1st pressing part 55a for joining the 1st surface layer 2a and the 2nd surface layer 2b in the outer side area 53 in the 2nd surface layer 2b. And the 2nd pressing part 55b for pressing only the 1st surface layer 2a in the horizontal direction outer side of the 2nd surface layer 2b is included.
  • FIG. 2 is an enlarged view showing a cut surface along the line II-II in FIG. 1, and the line II-II is a lateral center line QQ that bisects the dimension of the diaper 1 in the longitudinal direction A. And one of the double-headed arrows indicates the thickness direction C of the diaper 1.
  • the 1st surface layer 2a in a figure has the contact surface 56 which contacts a diaper wearer's skin, and the non-contact surface 57 which is the opposite surface.
  • the first surface layer 2 a also has a covering area 61 for the absorbent structure 4 and an extending area 62 from the peripheral edge 4 a of the absorbent structure 4.
  • the squeezed portion 55 is located in a part thereof.
  • the 1st pressing part 55a of the pressing parts 55 is located in the area
  • the 2nd pressing part 55b of the pressing parts 55 is located.
  • the pressing part 55 can be formed by processing the body side liner 2 with a heated embossing / debossing roll, and in the pressing part 55, the first surface layer 2a or the first surface layer 2a and the second surface layer overlapping therewith. 2b is in a state of being locally compressed under heating, and the thickness of the body side liner 2 is reduced in the compressed portion 55 and its periphery, and the first surface layer 2a and the second surface layer 2b are in close contact with each other. Alternatively, they are bonded and integrated by being fused and partially fused.
  • such a squeezed portion 55 is formed in the raised portion 34 having the slope 34a in the first surface layer 2a.
  • the raised surface 34 is formed on the contact surface 56 of the first surface layer 2a in FIG. 2, the raised portions 34 are arranged in the lateral direction B, and each of the adjacent raised portions 34 has a slope 34a formed respectively.
  • the groove part 36 is formed by continuing.
  • the raised portions 34 and the groove portions 36 extend in the longitudinal direction A substantially in parallel (see FIG. 7).
  • the raised portions 34 and the groove portions 36 extend between the end edges 17 and 18 of the diaper 1 so as to be substantially parallel to each other.
  • FIG. 1 only a part of the raised portion 34 and the groove portion 36 is shown in a very simplified state on the body side liner 2 in order to avoid a complicated drawing.
  • the second surface layer 2 b has a first surface 58 that faces the non-contact surface 57 of the first surface layer 2 a and a second surface 59 that is opposite to the first surface 58 and faces the absorption structure 4.
  • the second surfaces 58 and 59 are formed flat.
  • the first surface 58 is joined to the non-contact surface 57 of the first surface layer 2a via a hot melt adhesive Ad 2 to which the inner region 52 is intermittently or partially applied.
  • region 53 of the 1st surface 58 is joined to the 1st surface layer 2a in the 1st pressing part 55a formed in the 1st surface layer 2a.
  • the second surface 59 of the second surface 2b is bonded to the absorbent structure 4 by means of hot melt adhesive Ad 3 that is intermittently or partially coated.
  • Ad 3 hot melt adhesive
  • the 2nd surface layer 2b can also be stuck to absorption structure 4 without going through adhesives.
  • the 1st pressing part 55a formed also with respect to the 2nd surface layer 2b via the 1st surface layer 2a is located in the range within 15 mm from the periphery of the 2nd surface layer 2b in the vertical direction A and the horizontal direction B. It is preferable to make it. In other words, it is preferable that the width of the outer region 53 does not exceed 15 mm.
  • region 52 is bulkier and flexible than the outer side area
  • the absorbent structure 4 is formed by covering an aggregate of body fluid absorbent materials 21 such as pulverized pulp and super absorbent polymer particles with a wrapping sheet 22 such as tissue paper or a liquid permeable nonwoven fabric.
  • the wrapping sheet 22 includes an upper wrapping sheet 22 a and a lower wrapping sheet 22 b, and the both wrapping sheets 22 a and 22 b overlap at the peripheral edge 4 a of the absorbent structure 4. Both wrapping sheets 22a and 22b can also be bonded to the assembly of body fluid absorbent material 21 via a hot melt adhesive.
  • the outer cover 3 has a covering area 3 a for the absorbent structure 4 and an extending area 3 b from the peripheral edge 4 a of the absorbent structure 4.
  • the preferred coating area 3a is joined to the absorbent structure 4 via a hot melt adhesive (not shown) in order to retain the coating of the absorbent structure 4.
  • the extension region 3 b has a portion bonded to the extension region 62 in the first surface layer 2 a and a portion bonded to the side sheet 5.
  • a thermoplastic synthetic resin film or a laminate sheet of a film and a fiber nonwoven fabric can be used.
  • FIG. 3 is an enlarged view showing a cut surface along the line III-III in FIG. 1.
  • the line III-III is located at the top of the raised portion 34 and the dimension of the diaper 1 in the lateral direction B is two. It extends parallel to the equally dividing longitudinal center line PP.
  • This cut surface shows a cut surface for the rear waistline region 8 and a part of the crotch region 6 connected thereto, but also shows a cut surface for the front waistline region 7 and the crotch region 6 connected thereto.
  • the first surface layer 2 a includes a covering area 61 for the absorbent structure 4 and an extending area in the longitudinal direction A from the peripheral edge 4 a of the absorbent structure 4. 62.
  • the 2nd surface layer 2b is located in the horizontal direction inner side rather than the peripheral edge 4a of the absorption structure 4, and the outer side area
  • Such an outer region 53 in FIG. 3 is one of both end regions in the second surface layer 2b. However, in the second surface layer 2b, the outer region 53 (see FIG.
  • the inner area 52 is also an area that can be called an intermediate area located between the outer areas 53 and 53 in the longitudinal direction A.
  • the 2nd pressing part 55b is formed in the area
  • the first surface layer 2a and the second surface layer 2b at least the first surface layer 2a has a thickness at the portion where the first and second compressed portions 55a and 55b are formed and the peripheral portion thereof, and the second surface layer 2b.
  • the second surface layer 2b is not necessarily required to be in the form of FIG. In an example of this embodiment, the second surface layer 2b may reach the peripheral edge 4a of the absorbent structure 4 in the longitudinal direction A, or may extend from the peripheral edge 4a.
  • the second surface layer 2b is interposed between the first surface layer 2a and the absorption structure 4, so that the color of excrement such as body fluid absorbed by the absorption structure 4 is obtained. Can be reduced in the degree seen through the groove portion 36 in the first surface layer 2a. Also, by providing the second surface layer 2b having a density higher than the average density of the entire first surface layer 2a, or providing the second surface layer 2b having a density higher than the density of the groove portion 36 in the first surface layer 2a. Thus, when a density gradient that increases the density from the first surface layer 2a toward the absorption structure 4 is applied to the body-side liner 2, the body fluid moves from the first surface layer 2a toward the absorption structure 4. Can be promoted.
  • the second surface layer 2b is bonded to the first surface layer 2a only in the inner region 52.
  • the outer region 53 of the second surface layer 2b is the first region 2b.
  • a state in which the first surface layer 2a and / or the absorbent structure 4 are not in close contact with each other is likely to occur.
  • the outer region 53 of the second surface layer 2b is in close contact with the first surface layer 2a in the squeezed portion 55, even when body fluid passes through the outer region 53, the absorbent structure 4 can be absorbed quickly.
  • the 1st surface layer 2a has the 2nd pressing part 55b in the area
  • region is the 2nd surface layer 2b.
  • the density is higher than that of the first surface layer 2 a located in the inner region 52. Therefore, even when there is a risk that urine may leak sideways from the diaper 1 along the skin, the first surface layer 2a in which the second compressed portion 55b is formed and densified touches the skin. The urine can be absorbed quickly and side leakage can be prevented.
  • the side sheet 5 used for the diaper 1 is in the lateral direction B in the crotch region 6 because it is hydrophobic, more preferably hydrophobic and subjected to water repellent treatment. It acts to prevent flowing excrement from leaking around the legs of the diaper 1.
  • the first surface layer 2 a may extend from the central region of the crotch region 6 to the side edge portion 11 instead of using the side sheet 5.
  • a nonwoven fabric formed of thermoplastic synthetic fibers or a film formed of thermoplastic synthetic resin can be used as the side sheet 5.
  • FIG. 4-6 is a diagram illustrating a state in which the compressed portions 55 are distributed in the body side liner 2 with the portion IV in FIG. 1 as an example.
  • (a) is a partial plan view of the body-side liner 2
  • (b) is a cut surface along the ff line, gg line, and hh line in each body-side liner 2.
  • FIG. Further, a plurality of imaginary lines j extending in the vertical direction A in (a) indicates the position of the top of the raised portion 34.
  • a portion between adjacent virtual lines j and j corresponds to the groove portion 36 formed by the slope 34 a of the raised portion 34.
  • the second surface layer 2b is joined to a part thereof.
  • the pressing part 55 includes a first pressing part 55a in a state where the first surface layer 2a and the second surface layer 2b are compressed, and a second pressing part 55b in a state where only the first surface layer 2a is compressed. .
  • the compressed parts 55 act in such a way that each one changes the first surface layer 2a or the first surface layer 2a and the second surface layer 2b to a thin one, and a plurality of compressed parts arranged adjacent to each other. 55 also cooperates to change the thickness to a thinner one.
  • the 1st surface layer 2a and the 2nd surface layer 2b change so that a density may become high in the part in which the pressing part 55 is formed, and its peripheral part.
  • the plurality of compressed portions 55 formed at regular intervals are distributed on a virtual line 131 having a slope that rises to the right and a virtual line 132 that has a slope that rises to the left. is doing.
  • the virtual lines 131 and 132 intersect with each other and also with the virtual line j.
  • the squeezed portion 55 is formed so as to be periodically located at the top of the raised portion 34 or a peripheral portion of the raised portion, thereby forming a high-density portion in the raised portion 34.
  • the plurality of pressing parts 55 are located on the imaginary lines 131 and 132, but the interval between the pressing parts 55 on these imaginary lines is slightly different from the interval in FIG. 4 (b). Is different.
  • the plurality of pressing parts 55 are arranged so as to draw a ring 133.
  • the squeezing portion 55 can be formed by passing the sheet material for forming the body side liner 2 between a pair of embossing / debossing rolls.
  • a roll having a flat peripheral surface can be used for one of the pair of rolls, and a roll in which a plurality of pins or bosses corresponding to the compressed portion 55 are formed on the peripheral surface can be used for the other.
  • the pair of rolls or the pins or bosses of one roll are heated to such an extent that the thermoplastic synthetic fibers forming the sheet material for forming the first surface layer 2a can be fused together.
  • the planar shape of the compressed portion 55 can be defined by the tip shape of the pin or boss.
  • the diameter of the compressed portion 55 is preferably in the range of 0.3-3 mm.
  • the compressed parts 55 are arranged so as to be virtual lines such as virtual lines 131 and 132, the distance between the adjacent compressed parts 55, that is, the gap between the compressed parts 55 and 55 is 0.3-5 mm. It is preferable that it exists in the range.
  • FIG. 7 is a partial perspective view of the sheet 101 serving as a raw fabric for obtaining the first surface layer 2a.
  • the sheet 101 is preferably formed of thermoplastic synthetic fiber 52a having a fineness of 1-5 dtex and a fiber length of 20-70 mm, and has a mass per unit area of 15-40 g / m 2 .
  • the sheet 101 may also be a thermal bond nonwoven that has been heat treated and fused together with fibers 52a.
  • the sheet 101 in the figure has a first direction L, a second direction M, and a third direction corresponding to the longitudinal direction A, the lateral direction B, and the thickness direction C of the diaper 1.
  • the upper surface 101a of the sheet 101 corresponds to the contact surface 56 of the first surface layer 2a
  • the lower surface 101b corresponds to the non-contact surface 57 of the first surface layer 2a.
  • a raised portion 34 having a slope 34 a is formed on the upper surface 101 a, and a groove 36 is formed by the slope 34 a facing in the second direction M.
  • the dimension k from the lower surface 101b to the top of the raised portion 34 is in the range of 0.7-3 mm
  • the minimum dimension m from the lower surface 101b to the bottom of the groove 36 is in the range of 0.1-1 mm. It is preferable.
  • the dimension m is smaller than the dimension k, and the difference between the two dimensions k and m is preferably at least 0.3 mm.
  • thermoplastic synthetic fiber 52a is hydrophilized.
  • the sheet 101 in the portion used as the side sheet 5 is not subjected to a hydrophilic treatment. It is preferably used as a hydrophobic one or a hydrophobic one that has been subjected to a water repellent treatment.
  • the fiber when the fiber is hydrophilized, it means that the fiber is hydrophilized as a sheet of a fiber or a non-woven fabric formed of the fiber.
  • the fiber 52a preferably has a fineness of 1-6 dtex and a fiber length of 20-60 mm.
  • An example of a method for producing the sheet 101 used as the first surface layer 2a of the diaper 1 is as follows. First, steam, heated air, or columnar water flow from a plurality of nozzles arranged at a required pitch in a direction intersecting the machine direction while running a card web of uniform thickness formed of the thermoplastic synthetic fiber 52a in the machine direction. Are sprayed onto one side of the card web. The card web is placed on a breathable or water-permeable belt and travels in the machine direction together with the belt. The nozzle pitch is made to coincide with the pitch of the groove portions 36 in the sheet 101.
  • thermoplastic synthetic fibers 52a are rearranged in the crossing direction immediately below the nozzles to form a low-density groove 36, and a high-density raised portion 34 is formed between adjacent nozzles.
  • the sheet 101 is obtained.
  • the thermoplastic synthetic fiber 52a fibers such as polyethylene, nylon, and polyester, composite fibers of polyethylene and nylon, composite fibers of polyethylene and polyester, and the like are used.
  • the composite fiber is preferably of a core-sheath type, but may be of a parallel type.
  • These fibers 52a preferably have a fineness of 1-6 dtex and a fiber length of 20-60 mm.
  • the fiber 52a can also be used combining the thing from which the fineness differs.
  • the sheet 101 obtained in this way forms the squeezed portion 55 after the sheet to be the second surface layer 2b is joined thereto via a hot melt adhesive.
  • the second surface layer 2b joined to the first surface layer 2a is formed of, for example, a thermoplastic synthetic fiber such as polyethylene, nylon, or polyester, a composite fiber of polyethylene and polyester, or a composite fiber of polyethylene and polyester. It is used to hydrophilize a non-woven fabric.
  • the non-woven fabric is also an air-through non-woven fabric and is preferably stable in formation.
  • the second surface layer 2b has a mass per unit area of 15-40 g / m 2 and preferably has a thickness in the range of 0.1-0.6 mm under a mass of 3 g / cm 2 .
  • FIG. 8 is a view showing a cut surface similar to FIG. 2 showing an example of the embodiment of the present invention.
  • a well-known and conventional barrier cuff 80 is provided on both side edges 11 of the crotch region 6.
  • the barrier cuff 80 is a film or nonwoven fabric made of a thermoplastic synthetic resin, and is formed of a sheet material that is substantially liquid-impermeable. In the example of illustration, it forms by extending the side seat
  • An elastic body 86 extending in the longitudinal direction A is attached to the distal edge 81 of the barrier cuff 80 so as to be contractable in the extended state.
  • Such a barrier cuff 80 is in a state of being opposed to the body-side liner 2 in FIG. 8 before wearing the diaper. As shown by the line, the distal edge 81 is separated from the body side liner 2 toward the wearer's skin (not shown), and the flow of the body fluid in the lateral direction B is stopped, so that the Side leakage of body fluid can be prevented.
  • the diaper 1 shown so far is an open type that connects the front and rear waist regions 7 and 8 via the tape fastener 14, but the embodiment of the present invention is a pull-on in which the front and rear waist regions 7 and 8 are connected in advance. It can also be applied to diapers.
  • An absorbent structure having a longitudinal direction, a transverse direction, and a thickness direction, and interposed between the body-side liner and the liquid-impervious outer cover, and between the body-side liner and the outer cover Disposable diapers including
  • the body side liner includes a first surface layer extending from a peripheral edge of the absorbent structure in the longitudinal direction and the lateral direction, and the absorbent structure body and the first surface layer inside the peripheral edge in the lateral direction.
  • the first surface layer has a contact surface with respect to the skin of the wearer of the diaper and a non-contact surface opposite to the contact surface, and the contact surface extends in a plurality of strips substantially parallel to each other in the longitudinal direction.
  • each of the second surface layer is formed flat on both surfaces facing the non-contact surface and the absorption structure,
  • the second surface layer has an inner region located in the center in the lateral direction joined to the first surface layer via an adhesive, and outer regions located on both sides outside the inner region in the lateral direction.
  • the present invention can include at least the following embodiments.
  • the raised portion has slopes on both sides thereof, and the groove portion is formed by the slope between the raised portions adjacent in the lateral direction.
  • a plurality of second pressing portions are formed on the first surface layer in a region located outside the second surface layer in the lateral direction by compressing the first surface layer in the thickness direction. Yes.
  • the intermediate region located between the both end regions in the longitudinal direction is joined to the first surface layer via the adhesive.
  • the said 2nd pressing part is formed also in the area
  • the dimension from the non-contact surface to the top of the raised portion is in the range of 0.7-3 mm, and the bottom of the portion between the grooves formed by the inclined surfaces facing in the lateral direction And the non-contact surface is smaller than the dimension and in the range of 0.1-1 mm, and the difference between these two dimensions is at least 0.3 mm.
  • the number of ridges formed on the first surface layer per 1 cm length in the lateral direction is in the range of 2-5.
  • What is formed in the top part of the said protruding part is contained in a said 1st, 2nd pressing part.

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Description

使い捨ておむつDisposable diapers

　この発明は、使い捨ておむつに関する。 This invention relates to a disposable diaper.

　使い捨ておむつにおいて、透液性表面シートとおむつ着用者の肌との接触面積を小さくすることによって、その表面シートが肌に接触したときに生じる湿潤感を軽減しようとするものは公知である。例えば、特開２００８－２０３４号公報（ＪＰ２００８－２０３４Ａ、特許文献１）の図２，３における不織布の表面には、互いに平行して一方向へ延びる凸状部と溝部とが形成されている。また、図６，７の不織布では、その溝部に複数の開口部が形成されている。これらの不織布を透液性表面層として使用すると、その表面層は、凸状部において肌に接触する一方、溝部においては肌から離間する。 In disposable diapers, it is known to reduce the feeling of wetness that occurs when the surface sheet comes into contact with the skin by reducing the contact area between the liquid-permeable surface sheet and the skin of the diaper wearer. For example, on the surface of the nonwoven fabric in FIGS. 2 and 3 of Japanese Patent Application Laid-Open No. 2008-2034 (JP2008-2034A, Patent Document 1), convex portions and groove portions extending in one direction in parallel with each other are formed. Moreover, in the nonwoven fabric of FIGS. 6 and 7, a plurality of openings are formed in the groove. When these nonwoven fabrics are used as the liquid-permeable surface layer, the surface layer comes into contact with the skin at the convex portion, while being separated from the skin at the groove portion.

　また、特開２０１０－９４５３５号公報（ＪＰ２０１０－９４５３５Ａ、特許文献２）の図３には、ナプキンの表面層の一例として、畝部と溝部とを有するものが記載されている。畝部と溝部とは、互いに平行して一方向へ延びており、溝部には多数の開孔が形成されている。 FIG. 3 of JP 2010-94535 A (JP 2010-94535A, Patent Document 2) describes an example of a surface layer of a napkin that has a ridge and a groove. The flange portion and the groove portion extend in one direction in parallel with each other, and a large number of holes are formed in the groove portion.

特開２００８－２０３４号公報JP 2008-2034 A 特開２０１０－９４５３５号公報JP 2010-94535 A

　互いに平行して一方向へ延びる凸状部と溝部、または畝部と溝部とを有する不織布を使い捨ておむつの吸収体を被覆する透液性の身体側ライナー（着用シート）として使用する場合、吸収構造体に吸収された排泄物の色が、厚さの薄い溝部や溝部に形成された開孔において容易に透視されるということがある。そのことを防いだり、身体側ライナーから吸収構造体への排泄物の移動を促進したりするために、その身体側ライナーと吸収構造体との間に透液性の第２の表層を介在させることがある。 Absorption structure when using a nonwoven fabric having a convex part and a groove part extending in one direction parallel to each other, or a permeable part and a groove part as a liquid-permeable body side liner (wearing sheet) covering the absorbent body of a disposable diaper In some cases, the color of excrement absorbed by the body is easily seen through a thin groove portion or an opening formed in the groove portion. In order to prevent this and to facilitate excretion transfer from the body side liner to the absorbent structure, a liquid permeable second surface layer is interposed between the body side liner and the absorbent structure. Sometimes.

　この発明が課題とするところは、身体側ライナーと第２の表層との改良された使用形態を提供することにある。 The object of the present invention is to provide an improved form of use of the body side liner and the second surface layer.

　前記課題を解決するための、この発明は、縦方向と、横方向と、厚さ方向とを有し、透液性の身体側ライナーと不透液性の外カバーとの間に介在する吸収構造体を含む使い捨ておむつに係わる。 In order to solve the above-mentioned problem, the present invention has a longitudinal direction, a lateral direction, and a thickness direction, and is interposed between a liquid-permeable body-side liner and a liquid-impervious outer cover. The present invention relates to a disposable diaper including a structure.

　かかる使い捨ておむつにおいて、この発明が特徴とするところは、以下のとおりである。
　前記身体側ライナーは、前記縦方向と前記横方向とにおいて前記吸収構造体の周縁から延出している第１表層と、前記横方向において前記周縁の内側にあり前記吸収構造体と前記第１表層との間に介在して前記第１表層に接合している第２表層とを含み、前記第１、第２表層が親水化処理された熱可塑性合成繊維によって形成されている。前記第１表層は、前記おむつの着用者の肌に対する接触面と、その反対面である非接触面とを有していて、前記接触面には、前記縦方向へ互いにほぼ平行して延びる複数条の隆起部と、前記横方向において隣り合う前記隆起部の間の溝部とが位置し、前記非接触面は平坦に形成されている。前記第２表層は、前記非接触面と前記吸収構造体とに対向する両面のそれぞれが平坦に形成されている。前記第２表層は、前記横方向の中央に位置する内側域が接着剤を介して前記第１表層に接合し、前記横方向において前記内側域よりも外側の両側に位置する外側域が前記第１表層とともに圧搾された複数の第１圧搾部で前記第１表層に接合している。 In this disposable diaper, the features of the present invention are as follows.
The body side liner includes a first surface layer extending from a peripheral edge of the absorbent structure in the longitudinal direction and the lateral direction, and the absorbent structure body and the first surface layer inside the peripheral edge in the lateral direction. And a second surface layer joined to the first surface layer, and the first and second surface layers are formed of a thermoplastic synthetic fiber subjected to a hydrophilic treatment. The first surface layer has a contact surface with respect to the skin of the wearer of the diaper and a non-contact surface that is the opposite surface, and the contact surface has a plurality of portions extending substantially parallel to each other in the longitudinal direction. The ridges of the strips and the grooves between the ridges adjacent in the lateral direction are located, and the non-contact surface is formed flat. In the second surface layer, both surfaces facing the non-contact surface and the absorption structure are formed flat. The second surface layer has an inner region located in the center in the lateral direction joined to the first surface layer via an adhesive, and outer regions located on both sides outside the inner region in the lateral direction. It joins to the 1st surface layer by a plurality of 1st pressing parts pressed together with 1 surface layer.

　この発明に係る使い捨ておむつの一つ以上の実施形態では、吸収構造体を被覆する透液性の身体側ライナーとして、親水化処理された熱可塑性合成繊維で形成されている第１表層と第２表層とを含む。第２表層は、第１表層よりも密度が高いので、第１表層から吸収構造体へ向かう方向の体液の移動を促進することができる。第２表層は、おむつにおける横方向の中央に位置する内側域が接着剤を介して第１表層に接合する一方、横方向における両外側域が第１圧搾部において第１表層に接合する。その外側域に位置する第１、第２表層の密度は、内側域に位置する第１、第２表層の密度よりも高く、第１表層において横方向へ流れる体液をその外側域に位置するところで速やかに吸収することができる。第１表層は、第２表層よりも横方向外側に位置する部分に第２圧搾部が形成されて高密度化することにより、その部分が着用者の肌に触れたときには、おむつ着用者の肌を伝っておむつの横方向へ流れる体液を吸収して、体液がおむつから横漏れすることを防ぐことができる。 In one or more embodiments of the disposable diaper according to the present invention, as the liquid-permeable body side liner covering the absorbent structure, the first surface layer and the second layer formed of thermoplastic synthetic fibers subjected to hydrophilic treatment Including surface layer. Since the density of the second surface layer is higher than that of the first surface layer, the movement of body fluid in the direction from the first surface layer toward the absorption structure can be promoted. As for a 2nd surface layer, while the inner side area located in the center of the horizontal direction in a diaper joins to the 1st surface layer via an adhesive agent, both the outer side areas in a horizontal direction join to the 1st surface layer in the 1st pressing part. The density of the first and second surface layers located in the outer region is higher than the density of the first and second surface layers located in the inner region, and the body fluid flowing in the lateral direction in the first surface layer is located in the outer region. It can be absorbed quickly. The first surface layer is formed in a portion located on the outer side in the lateral direction from the second surface layer, and when the second pressing portion is densified, when the portion touches the skin of the wearer, the skin of the diaper wearer The body fluid flowing in the lateral direction of the diaper along the path can be absorbed and the body fluid can be prevented from leaking from the diaper.

この発明に係る使い捨ておむつの部分破断平面図。The partially broken top view of the disposable diaper which concerns on this invention. 図１のＩＩ－ＩＩ線切断面を拡大して示す図。The figure which expands and shows the II-II line | wire cut surface of FIG. 図１のＩＩＩ－ＩＩＩ線切断面を拡大して示す図。The figure which expands and shows the III-III line | wire cut surface of FIG. 圧搾部の分布状態の一例を示す図。The figure which shows an example of the distribution state of a pressing part. 圧搾部の分布状態の一例を示す図。The figure which shows an example of the distribution state of a pressing part. 圧搾部の分布状態の一例を示す図。The figure which shows an example of the distribution state of a pressing part. 第１表層として使用するシートの部分斜視図。The fragmentary perspective view of the sheet | seat used as a 1st surface layer. 実施形態の一例を示す図２と同様な図。The figure similar to FIG. 2 which shows an example of embodiment.

　添付の図面を参照して、この発明に係る使い捨ておむつの実施形態の詳細を説明すると、以下のとおりである。 The details of an embodiment of the disposable diaper according to the present invention will be described below with reference to the accompanying drawings.

　図１は、使い捨ておむつ１の部分破断平面図である。おむつ１は、その一例として、開放型のものが示され、双頭矢印で示された縦方向Ａと横方向Ｂと厚さ方向Ｃ（図２参照）とを有する。おむつ１はまた、透液性の身体側ライナー２と不透液性の外カバー３と、これらの間に介在する体液の吸収構造体４とを有する。おむつ１の縦方向Ａには前胴回り域７と、後胴回り域８と、これら両胴回り域７，８の間に介在する股下域６とが位置している。股下域６の両側縁部１１は、横方向Ｂの内側に向かって湾曲している。両側縁部１１では、疎水性、より好ましくは疎水性かつ撥水性を有するサイドシート５がホットメルト接着剤Ａｄ１を介して外カバー３に重ねられている。サイドシート５と外カバー３との間には、伸長状態で延びる脚回り弾性体１２がサイドシート５および外カバー３の少なくとも一方にホットメルト接着剤（図示せず）を介して接合されている。後胴回り域８の両側縁部１３には、前後胴回り域７，８を離脱可能に連結するためのテープファスナ１４が取り付けられている。前後胴回り域７，８の端縁部１７，１８における後記第１表層２ａと外カバー３との間には胴回り弾性体７ａ，８ａが、伸長状態で横方向Ｂへ延びていて、第１表層２ａおよび外カバー３の少なくとも一方にホットメルト接着剤（図示せず）を介して固定されている。 FIG. 1 is a partially broken plan view of a disposable diaper 1. As an example, the diaper 1 is an open type, and has a vertical direction A, a horizontal direction B, and a thickness direction C (see FIG. 2) indicated by double-headed arrows. The diaper 1 also has a liquid-permeable body-side liner 2, a liquid-impervious outer cover 3, and a body fluid absorbing structure 4 interposed therebetween. In the longitudinal direction A of the diaper 1, a front waistline region 7, a rear waistline region 8, and a crotch region 6 interposed between the both waistline regions 7 and 8 are located. Both side edges 11 of the crotch region 6 are curved inward in the lateral direction B. At the side edge portions 11, a side sheet 5 having hydrophobicity, more preferably hydrophobic and water repellency, is overlaid on the outer cover 3 via a hot-melt adhesive Ad 1 . Between the side sheet 5 and the outer cover 3, a leg-hole elastic body 12 extending in an extended state is joined to at least one of the side sheet 5 and the outer cover 3 via a hot melt adhesive (not shown). . Tape fasteners 14 are attached to both side edge portions 13 of the rear waistline region 8 to releasably connect the front and rear waistline regions 7 and 8. Between the first surface layer 2a (described later) and the outer cover 3 at the edge portions 17 and 18 of the front and rear waist regions 7 and 8, waist elastic bodies 7a and 8a extend in the lateral direction B in an extended state, and the first surface layer It is fixed to at least one of 2a and the outer cover 3 via a hot melt adhesive (not shown).

　図１において、破断状態で示されている身体側ライナー２は、おむつ着用者（図示せず）の肌と接触する第１表層２ａと、第１表層２ａと吸収構造体４との間に介在する第２表層２ｂとを含む。第１表層２ａは親水化処理された熱可塑性合成繊維５２ａ（図７参照）のステープルによって形成され、第２表層２ｂは親水化処理された熱可塑性合成繊維（図示せず）のステープルまたはフィラメントによって形成されている。第１表層２ａは、縦方向Ａと横方向Ｂとのうちの少なくとも横方向Ｂにおいて吸収構造体４の周縁４ａから延出していて、その延出する部分がホットメルト接着剤Ａｄ１を介して外カバー３に接合している。第２表層２ｂは、吸収構造体４の周縁４ａの内側に位置していて、おむつ１の横方向Ｂの寸法を二等分する中心線Ｐ－Ｐに関して対称であって、仮想線によって図示されている内側域５２がホットメルト接着剤Ａｄ２を介して第１表層２ａに接合し、内側域５２を囲む外側域５３がドット状に形成された圧搾部５５において第１表層２ａに密着した状態または融着した状態で接合している。第１表層２ａと第２表層２ｂとがホットメルト接着剤Ａｄ２を介して接合しているときの好ましい一例では、ホットメルト接着剤Ａｄ２が縦方向Ａおよび／または横方向Ｂにおいて断続的または部分的に塗布されている。また、第１表層２ａと第２表層２ｂとが圧搾部５５において密着しているときの好ましい一例では、両層２ａ，２ｂを形成している繊維が機械的に互いに交絡している。第２表層２ｂにおいて、外側域５３は、第２表層２ｂ全体に位置していて、両側域と両端域とから成る。内側域５２は、第２表層２ｂにおける横方向Ｂの中央域であって、縦方向Ａにおいてはおむつ着用者の排尿が想定される域に拡がっていることが好ましい。したがって、第２表層２ｂの縦方向Ａの寸法が吸収構造体４のそれよりもかなり小さいものであるときの第２表層２ｂは、その大部分がおむつ１の横方向中心線Ｑ－Ｑよりも縦方向前側に位置していることが好ましい。おむつ１が乳幼児用のものである場合の第２表層２ｂは、縦方向Ａの寸法が５０－１５０ｍｍの範囲にあり、横方向Ｂの寸法が３０－１００ｍｍの範囲にあることが好ましい。
　本実施形態において、「内側域５２」および「外側域５３」とは、本実施形態に係るおむつを横方向Ｂから視たそれぞれの域をいう。 In FIG. 1, the body side liner 2 shown in a broken state is interposed between a first surface layer 2a that comes into contact with the skin of a diaper wearer (not shown), and between the first surface layer 2a and the absorbent structure 4. Second surface layer 2b. The first surface layer 2a is formed of staples of thermoplastic synthetic fibers 52a (see FIG. 7) subjected to hydrophilic treatment, and the second surface layer 2b is formed of staples or filaments of thermoplastic synthetic fibers (not shown) subjected to hydrophilic treatment. Is formed. The first surface layer 2a, the vertical direction A and in the transverse direction B and not extend from a peripheral edge 4a of the absorbent structure 4 at least in the transverse direction B of the portion to be output thereof extending via a hot-melt adhesive Ad 1 The outer cover 3 is joined. The second surface layer 2b is located on the inner side of the peripheral edge 4a of the absorbent structure 4 and is symmetrical with respect to a center line PP that bisects the dimension of the diaper 1 in the lateral direction B, and is illustrated by an imaginary line. state which has inner zone 52 is joined to the first surface 2a by means of hot melt adhesive Ad 2, the outer zone 53 surrounding the inner region 52 is in close contact with the first surface 2a in the compressing portion 55 formed in a dot shape Or it joins in the state fuse | melted. In a preferred example of a case where the first surface 2a and second surface 2b are bonded with a hot melt adhesive Ad 2, intermittent or hot melt adhesive Ad 2 is in the longitudinal direction A and / or transverse direction B Partly applied. Moreover, in a preferable example when the 1st surface layer 2a and the 2nd surface layer 2b are closely_contact | adhered in the pressing part 55, the fiber which forms both layers 2a and 2b is mechanically entangled mutually. In the second surface layer 2b, the outer region 53 is located on the entire second surface layer 2b and consists of both side regions and both end regions. The inner region 52 is a central region in the lateral direction B in the second surface layer 2b, and in the longitudinal direction A, the inner region 52 preferably extends to a region where diaper wearer urination is assumed. Therefore, the second surface layer 2b when the dimension of the second surface layer 2b in the longitudinal direction A is considerably smaller than that of the absorbent structure 4 is mostly larger than the lateral center line QQ of the diaper 1. It is preferable to be located on the front side in the vertical direction. When the diaper 1 is for an infant, the second surface layer 2b preferably has a longitudinal dimension A in the range of 50-150 mm and a lateral dimension B in the range of 30-100 mm.
In the present embodiment, the “inner region 52” and the “outer region 53” refer to respective regions when the diaper according to the present embodiment is viewed from the lateral direction B.

　この発明において、圧搾部５５は、第１表層２ａに対して形成されるところ、第１表層２ａと第２表層２ｂとを第２表層２ｂにおける外側域５３において接合するための第１圧搾部５５ａと、第１表層２ａのみを第２表層２ｂの横方向外側において圧搾するための第２圧搾部５５ｂとを含む。 In this invention, when the pressing part 55 is formed with respect to the 1st surface layer 2a, the 1st pressing part 55a for joining the 1st surface layer 2a and the 2nd surface layer 2b in the outer side area 53 in the 2nd surface layer 2b. And the 2nd pressing part 55b for pressing only the 1st surface layer 2a in the horizontal direction outer side of the 2nd surface layer 2b is included.

　図２は、図１のＩＩ－ＩＩ線に沿う切断面を拡大して示す図であって、ＩＩ－ＩＩ線はおむつ１の縦方向Ａの寸法を二等分する横方向中心線Ｑ－Ｑに一致し、双頭矢印の一つはおむつ１の厚さ方向Ｃを示している。図中の第１表層２ａは、おむつ着用者の肌と接触する接触面５６と、その反対面である非接触面５７とを有する。第１表層２ａはまた、吸収構造体４に対する被覆域６１と、吸収構造体４の周縁４ａからの延出域６２を有する。被覆域６１と延出域６２とのうちの少なくとも被覆域６１では、その一部分に圧搾部５５が位置している。具体的には、被覆域６１のうちで第２表層２ｂにおける外側域５３と重なる域には圧搾部５５のうちの第１圧搾部５５ａが位置し、第２表層２ｂよりも横方向外側には圧搾部５５のうちの第２圧搾部５５ｂが位置している。 FIG. 2 is an enlarged view showing a cut surface along the line II-II in FIG. 1, and the line II-II is a lateral center line QQ that bisects the dimension of the diaper 1 in the longitudinal direction A. And one of the double-headed arrows indicates the thickness direction C of the diaper 1. The 1st surface layer 2a in a figure has the contact surface 56 which contacts a diaper wearer's skin, and the non-contact surface 57 which is the opposite surface. The first surface layer 2 a also has a covering area 61 for the absorbent structure 4 and an extending area 62 from the peripheral edge 4 a of the absorbent structure 4. In at least the covered area 61 of the covered area 61 and the extended area 62, the squeezed portion 55 is located in a part thereof. Specifically, the 1st pressing part 55a of the pressing parts 55 is located in the area | region which overlaps with the outer side area | region 53 in the 2nd surface layer 2b among the coating | coated areas 61, and it exists in the horizontal direction outer side rather than the 2nd surface layer 2b. The 2nd pressing part 55b of the pressing parts 55 is located.

　圧搾部５５は、身体側ライナー２を加熱されたエンボス／デボス加工ロールで処理することにより形成することができ、その圧搾部５５では、第１表層２ａまたは第１表層２ａとそれに重なる第２表層２ｂが加熱下に局部的に圧縮された状態にあって、圧搾部５５とその周辺において身体側ライナー２の厚さが薄くなるとともに、第１表層２ａと第２表層２ｂとが密着することにより、または密着するとともに一部分が融着することにより接合して一体化されている。 The pressing part 55 can be formed by processing the body side liner 2 with a heated embossing / debossing roll, and in the pressing part 55, the first surface layer 2a or the first surface layer 2a and the second surface layer overlapping therewith. 2b is in a state of being locally compressed under heating, and the thickness of the body side liner 2 is reduced in the compressed portion 55 and its periphery, and the first surface layer 2a and the second surface layer 2b are in close contact with each other. Alternatively, they are bonded and integrated by being fused and partially fused.

　身体側ライナー２では、このような圧搾部５５が、第１表層２ａにおける、斜面３４ａを有する隆起部３４に形成されている。図２における第１表層２ａの接触面５６には、その隆起部３４が形成されていて、隆起部３４が互いに横方向Ｂに並び、隣り合う隆起部３４それぞれは、それぞれに形成された斜面３４ａが連なることによって溝部３６を形成している。これら隆起部３４と溝部３６とは、ほぼ平行して縦方向Ａへ延びている（図７参照）。図１のおむつ１では、これら隆起部３４と溝部３６とが互いにほぼ平行しておむつ１の端縁部１７，１８の間に延びている。ただし、図１では、図が煩雑なものになることを避けるために、身体側ライナー２には、隆起部３４と溝部３６との一部分のみが極めて簡略化された状態で示されている。 In the body side liner 2, such a squeezed portion 55 is formed in the raised portion 34 having the slope 34a in the first surface layer 2a. The raised surface 34 is formed on the contact surface 56 of the first surface layer 2a in FIG. 2, the raised portions 34 are arranged in the lateral direction B, and each of the adjacent raised portions 34 has a slope 34a formed respectively. The groove part 36 is formed by continuing. The raised portions 34 and the groove portions 36 extend in the longitudinal direction A substantially in parallel (see FIG. 7). In the diaper 1 of FIG. 1, the raised portions 34 and the groove portions 36 extend between the end edges 17 and 18 of the diaper 1 so as to be substantially parallel to each other. However, in FIG. 1, only a part of the raised portion 34 and the groove portion 36 is shown in a very simplified state on the body side liner 2 in order to avoid a complicated drawing.

　図２において、第２表層２ｂは、第１表層２ａの非接触面５７と向き合う第１面５８とその反対面であって吸収構造体４と向き合う第２面５９を有し、これら第１，第２面５８，５９が平坦に形成されている。第１面５８は、内側域５２が断続的または部分的に塗布されているホットメルト接着剤Ａｄ２を介して第１表層２ａの非接触面５７に接合している。また、第１面５８のうちの外側域５３は、第１表層２ａに形成された第１圧搾部５５ａにおいて、第１表層２ａに接合している。第２表層２ｂの第２面５９は、断続的または部分的に塗布されているホットメルト接着剤Ａｄ３を介して吸収構造体４に接合している。ただし、第２表層２ｂは、接着剤を介することなく吸収構造体４に密着させておくこともできる。なお、第１表層２ａを介して第２表層２ｂに対しても形成される第１圧搾部５５ａは、縦方向Ａと横方向Ｂとにおいて、第２表層２ｂの周縁から１５ｍｍ以内の範囲に位置させることが好ましい。換言すると、外側域５３の幅は１５ｍｍを越えないことが好ましい。そのような第２表層２ｂでは、内側域５２が外側域５３よりも嵩高で柔軟であり、身体側ライナー２を横方向Ｂの中央域において肌触りのよいものにすることができる。 In FIG. 2, the second surface layer 2 b has a first surface 58 that faces the non-contact surface 57 of the first surface layer 2 a and a second surface 59 that is opposite to the first surface 58 and faces the absorption structure 4. The second surfaces 58 and 59 are formed flat. The first surface 58 is joined to the non-contact surface 57 of the first surface layer 2a via a hot melt adhesive Ad 2 to which the inner region 52 is intermittently or partially applied. Moreover, the outer side area | region 53 of the 1st surface 58 is joined to the 1st surface layer 2a in the 1st pressing part 55a formed in the 1st surface layer 2a. The second surface 59 of the second surface 2b is bonded to the absorbent structure 4 by means of hot melt adhesive Ad 3 that is intermittently or partially coated. However, the 2nd surface layer 2b can also be stuck to absorption structure 4 without going through adhesives. In addition, the 1st pressing part 55a formed also with respect to the 2nd surface layer 2b via the 1st surface layer 2a is located in the range within 15 mm from the periphery of the 2nd surface layer 2b in the vertical direction A and the horizontal direction B. It is preferable to make it. In other words, it is preferable that the width of the outer region 53 does not exceed 15 mm. In such 2nd surface layer 2b, the inner side area | region 52 is bulkier and flexible than the outer side area | region 53, and can make the body side liner 2 feel good in the center area of the horizontal direction B. FIG.

　吸収構造体４は、粉砕パルプ、高吸水性ポリマー粒子等の体液吸収性材料２１の集合体をティッシューペーパや透液性の繊維不織布等のラッピングシート２２で被覆することにより形成されている。図において、そのラッピングシート２２は、上方ラッピングシート２２ａと下方ラッピングシート２２ｂとを含み、両ラッピングシート２２ａ，２２ｂが吸収構造体４の周縁４ａにおいて重なり合っている。両ラッピングシート２２ａ，２２ｂはまた、体液吸収性材料２１の集合体に対してホットメルト接着剤を介して接合することができる。 The absorbent structure 4 is formed by covering an aggregate of body fluid absorbent materials 21 such as pulverized pulp and super absorbent polymer particles with a wrapping sheet 22 such as tissue paper or a liquid permeable nonwoven fabric. In the figure, the wrapping sheet 22 includes an upper wrapping sheet 22 a and a lower wrapping sheet 22 b, and the both wrapping sheets 22 a and 22 b overlap at the peripheral edge 4 a of the absorbent structure 4. Both wrapping sheets 22a and 22b can also be bonded to the assembly of body fluid absorbent material 21 via a hot melt adhesive.

　外カバー３は、吸収構造体４に対する被覆域３ａと、吸収構造体４の周縁４ａからの延出域３ｂとを有する。好ましい被覆域３ａは、吸収構造体４の被覆を保持するため、ホットメルト接着剤（図示せず）を介して吸収構造体４に接合している。延出域３ｂは、第１表層２ａにおける延出域６２に対して接合している部分と、サイドシート５に対して接合している部分とを有する。外カバー３には、熱可塑性合成樹脂のフィルムやフィルムと繊維不織布とのラミネートシート等を使用することができる。 The outer cover 3 has a covering area 3 a for the absorbent structure 4 and an extending area 3 b from the peripheral edge 4 a of the absorbent structure 4. The preferred coating area 3a is joined to the absorbent structure 4 via a hot melt adhesive (not shown) in order to retain the coating of the absorbent structure 4. The extension region 3 b has a portion bonded to the extension region 62 in the first surface layer 2 a and a portion bonded to the side sheet 5. For the outer cover 3, a thermoplastic synthetic resin film or a laminate sheet of a film and a fiber nonwoven fabric can be used.

　図３は、図１のＩＩＩ－ＩＩＩ線に沿う切断面を拡大して示す図であって、ＩＩＩ－ＩＩＩ線は、隆起部３４の頂部に位置し、おむつ１の横方向Ｂの寸法を二等分する縦方向中心線Ｐ－Ｐに平行して延びている。この切断面は、後胴回り域８とそれに連なる股下域６の一部分とについての切断面を示すが、前胴回り域７とそれに連なる股下域６とについての切断面をも示す。 FIG. 3 is an enlarged view showing a cut surface along the line III-III in FIG. 1. The line III-III is located at the top of the raised portion 34 and the dimension of the diaper 1 in the lateral direction B is two. It extends parallel to the equally dividing longitudinal center line PP. This cut surface shows a cut surface for the rear waistline region 8 and a part of the crotch region 6 connected thereto, but also shows a cut surface for the front waistline region 7 and the crotch region 6 connected thereto.

　図３で明らかなように、おむつ１の縦方向Ａにおいてもまた、第１表層２ａは、吸収構造体４に対する被覆域６１と、吸収構造体４の周縁４ａから縦方向Ａへの延出域６２とを有する。第２表層２ｂは、吸収構造体４の周縁４ａよりも横方向内側に位置しており、第１表層２ａに対して、第１圧搾部５５ａにおいて接合している外側域５３と、外側域５３の横方向内側にあってホットメルト接着剤Ａｄ２を介して接合している内側域５２とを有する。このような図３における外側域５３は、第２表層２ｂにおける両端域のうちの一方である。ただし、第２表層２ｂにおいて、縦方向前方に形成されている外側域５３（図１参照）と縦方向後方に形成されている外側域５３とは、縦方向Ａの寸法が同じである場合と異なる場合とがある。なお、内側域５２は、縦方向Ａにおいてこれら外側域５３と５３との間に位置する中間域と呼ぶことのできる域でもある。第１表層２ａには、吸収構造体４と重なる域に第２圧搾部５５ｂが形成されている。ただし、第２圧搾部５５ｂは、第１表層２ａのうちの延出域６２に形成されていてもよい。第１表層２ａと第２表層２ｂとのうちで、少なくとも第１表層２ａは、第１、第２圧搾部５５ａ，５５ｂが形成されている部分とその周辺部分における厚さが、第２表層２ｂにおける内側域５２に重なる域の厚さよりも薄くなっている。また、その結果として、第１表層２ａは、圧搾部５５が形成されている部分とその周辺部分とにおける密度が、圧搾部５５の形成されていない部分の密度に比べて高くなる傾向にある。なお、この発明の実施形態において、第２表層２ｂは、吸収構造体４に対して図３の態様にあることを必須の要件とするものではない。この実施形態の一例において、第２表層２ｂは、縦方向Ａにおいて吸収構造体４の周縁４ａに届いていてもよいし、周縁４ａから延出していてもよい。 As apparent from FIG. 3, also in the longitudinal direction A of the diaper 1, the first surface layer 2 a includes a covering area 61 for the absorbent structure 4 and an extending area in the longitudinal direction A from the peripheral edge 4 a of the absorbent structure 4. 62. The 2nd surface layer 2b is located in the horizontal direction inner side rather than the peripheral edge 4a of the absorption structure 4, and the outer side area | region 53 joined in the 1st pressing part 55a with respect to the 1st surface layer 2a, and the outer side area | region 53 And an inner region 52 joined via a hot-melt adhesive Ad 2 . Such an outer region 53 in FIG. 3 is one of both end regions in the second surface layer 2b. However, in the second surface layer 2b, the outer region 53 (see FIG. 1) formed forward in the vertical direction and the outer region 53 formed rearward in the vertical direction have the same dimension in the vertical direction A. It may be different. The inner area 52 is also an area that can be called an intermediate area located between the outer areas 53 and 53 in the longitudinal direction A. The 2nd pressing part 55b is formed in the area | region which overlaps with the absorption structure 4 at the 1st surface layer 2a. However, the 2nd pressing part 55b may be formed in the extension area | region 62 of the 1st surface layer 2a. Among the first surface layer 2a and the second surface layer 2b, at least the first surface layer 2a has a thickness at the portion where the first and second compressed portions 55a and 55b are formed and the peripheral portion thereof, and the second surface layer 2b. It is thinner than the thickness of the area overlapping the inner area 52 in FIG. As a result, in the first surface layer 2a, the density in the portion where the compressed portion 55 is formed and the peripheral portion thereof tends to be higher than the density of the portion where the compressed portion 55 is not formed. In the embodiment of the present invention, the second surface layer 2b is not necessarily required to be in the form of FIG. In an example of this embodiment, the second surface layer 2b may reach the peripheral edge 4a of the absorbent structure 4 in the longitudinal direction A, or may extend from the peripheral edge 4a.

　このように形成されているおむつ１では、第２表層２ｂが第１表層２ａと吸収構造体４との間に介在することによって、吸収構造体４に吸収されている体液等の排泄物の色が第１表層２ａにおける溝部３６において透視される程度を軽減することができる。また、第１表層２ａ全体についての平均的な密度よりも高い密度を有する第２表層２ｂを設けることによって、または、第１表層２ａにおける溝部３６の密度よりも高い密度の第２表層２ｂを設けることによって、第１表層２ａから吸収構造体４に向かって密度が高くなるような密度の勾配を身体側ライナー２に付けると、第１表層２ａから吸収構造体４に向かっての体液の移動を促進することができる。 In the diaper 1 thus formed, the second surface layer 2b is interposed between the first surface layer 2a and the absorption structure 4, so that the color of excrement such as body fluid absorbed by the absorption structure 4 is obtained. Can be reduced in the degree seen through the groove portion 36 in the first surface layer 2a. Also, by providing the second surface layer 2b having a density higher than the average density of the entire first surface layer 2a, or providing the second surface layer 2b having a density higher than the density of the groove portion 36 in the first surface layer 2a. Thus, when a density gradient that increases the density from the first surface layer 2a toward the absorption structure 4 is applied to the body-side liner 2, the body fluid moves from the first surface layer 2a toward the absorption structure 4. Can be promoted.

　第２表層２ｂは、その内側域５２においてのみ第１表層２ａに対して接合しておくことも考えられるが、そのようなときの身体側ライナー２では、第２表層２ｂの外側域５３が第１表層２ａおよび／または吸収構造体４に密着しない状態が生じ易くなる。その結果として、おむつ１の厚さ方向Ｃにおいて、体液は外側域５３を通って吸収構造体４へ速やかに移動するということが難しくなる。しかし、この発明の実施形態に係るおむつ１では、第２表層２ｂの外側域５３を圧搾部５５において第１表層２ａに密着させてあるので、体液は外側域５３を通るときでも、吸収構造体４に速やかに吸収されることが可能になる。また、おむつを着用したときに見られる現象として、排泄量が極めて微量であるときの尿は、身体側ライナーに接触する前におむつ着用者の肌を伝って流れたり、身体側ライナーに接触しても身体側ライナーに吸収されるには至らずに、肌を伝って流れたりして、おむつにおける横漏れの原因になることがある。しかし、この発明の実施形態に係るおむつ１では、第１表層２ａが第２表層２ｂよりも横方向外側に位置する域に第２圧搾部５５ｂを有し、その域は、第２表層２ｂの内側域５２に位置している第１表層２ａに比べて高密度化した状態にある。それゆえ、尿が肌を伝っておむつ１から横漏れするというおそれがある場合であっても、第２圧搾部５５ｂが形成されて高密度化している第１表層２ａが肌に触れることによって、その尿を速やかに吸収し、横漏れを未然に防ぐことが可能になる。 It is conceivable that the second surface layer 2b is bonded to the first surface layer 2a only in the inner region 52. However, in such a body side liner 2, the outer region 53 of the second surface layer 2b is the first region 2b. A state in which the first surface layer 2a and / or the absorbent structure 4 are not in close contact with each other is likely to occur. As a result, in the thickness direction C of the diaper 1, it becomes difficult for body fluid to move quickly through the outer region 53 to the absorbent structure 4. However, in the diaper 1 according to the embodiment of the present invention, since the outer region 53 of the second surface layer 2b is in close contact with the first surface layer 2a in the squeezed portion 55, even when body fluid passes through the outer region 53, the absorbent structure 4 can be absorbed quickly. In addition, as a phenomenon seen when wearing diapers, urine when excretion is extremely small flows along the skin of the diaper wearer before contacting the body side liner, or contacts the body side liner. Even if it is not absorbed by the body side liner, it may flow along the skin and cause side leakage in the diaper. However, in the diaper 1 which concerns on embodiment of this invention, the 1st surface layer 2a has the 2nd pressing part 55b in the area | region located in the horizontal direction outer side rather than the 2nd surface layer 2b, The area | region is the 2nd surface layer 2b. The density is higher than that of the first surface layer 2 a located in the inner region 52. Therefore, even when there is a risk that urine may leak sideways from the diaper 1 along the skin, the first surface layer 2a in which the second compressed portion 55b is formed and densified touches the skin. The urine can be absorbed quickly and side leakage can be prevented.

　おむつ１に使用されているサイドシート５は、それが疎水性であることによって、より好ましくは疎水性であってかつ撥水処理が施されていることによって、股下域６においては横方向Ｂへ流れる排泄物がおむつ１の脚回りから漏れることを阻止するように作用する。ただし、この発明の実施形態では、サイドシート５を使用することに代えて、第１表層２ａが股下域６の中央域から側縁部１１にまで延びていてもよい。サイドシート５には、熱可塑性合成繊維で形成された不織布や熱可塑性合成樹脂で形成されたフィルムを使用することができる。 The side sheet 5 used for the diaper 1 is in the lateral direction B in the crotch region 6 because it is hydrophobic, more preferably hydrophobic and subjected to water repellent treatment. It acts to prevent flowing excrement from leaking around the legs of the diaper 1. However, in the embodiment of the present invention, the first surface layer 2 a may extend from the central region of the crotch region 6 to the side edge portion 11 instead of using the side sheet 5. As the side sheet 5, a nonwoven fabric formed of thermoplastic synthetic fibers or a film formed of thermoplastic synthetic resin can be used.

　図４－６は、身体側ライナー２において圧搾部５５が分布する状態を図１の部分ＩＶを対象にして例示する図である。各図において、（ａ）は身体側ライナー２の部分平面図であり、（ｂ）はそれぞれの身体側ライナー２におけるｆ－ｆ線、ｇ－ｇ線、ｈ－ｈ線に沿った切断面を示す図である。また、（ａ）において縦方向Ａへ延びる複数本の仮想線ｊは、隆起部３４の頂部の位置を示している。隣り合う仮想線ｊとｊとの間の部分は、隆起部３４の斜面３４ａが形成している溝部３６に相当する。（ｂ）の第１表層２ａでは、その一部分に第２表層２ｂが接合している。圧搾部５５には、第１表層２ａと第２表層２ｂとが圧搾された状態にある第１圧搾部５５ａと、第１表層２ａのみが圧搾された状態にある第２圧搾部５５ｂとがある。多数の第１圧搾部５５ａと第２圧搾部５５ｂの中には、隆起部３４の頂部または頂部の周辺部分に形成されているものが含まれている。圧搾部５５は、その一つずつが第１表層２ａまたは第１表層２ａと第２表層２ｂを厚さの薄いものに変化させるように作用することに加え、互いに隣接して並ぶ複数の圧搾部５５が協働することによってもその厚さを薄いものに変化させるように作用している。その結果として、第１表層２ａと第２表層２ｂとは、圧搾部５５が形成されている部分とその周辺部分において密度が高くなるように変化する。 FIG. 4-6 is a diagram illustrating a state in which the compressed portions 55 are distributed in the body side liner 2 with the portion IV in FIG. 1 as an example. In each figure, (a) is a partial plan view of the body-side liner 2, and (b) is a cut surface along the ff line, gg line, and hh line in each body-side liner 2. FIG. Further, a plurality of imaginary lines j extending in the vertical direction A in (a) indicates the position of the top of the raised portion 34. A portion between adjacent virtual lines j and j corresponds to the groove portion 36 formed by the slope 34 a of the raised portion 34. In the first surface layer 2a of (b), the second surface layer 2b is joined to a part thereof. The pressing part 55 includes a first pressing part 55a in a state where the first surface layer 2a and the second surface layer 2b are compressed, and a second pressing part 55b in a state where only the first surface layer 2a is compressed. . In many 1st pressing parts 55a and 2nd pressing parts 55b, what is formed in the peripheral part of the top part of the protruding part 34, or the top part is contained. The compressed parts 55 act in such a way that each one changes the first surface layer 2a or the first surface layer 2a and the second surface layer 2b to a thin one, and a plurality of compressed parts arranged adjacent to each other. 55 also cooperates to change the thickness to a thinner one. As a result, the 1st surface layer 2a and the 2nd surface layer 2b change so that a density may become high in the part in which the pressing part 55 is formed, and its peripheral part.

　図４の（ａ）において、一定間隔で形成されている複数の圧搾部５５は、ほぼ等間隔に並んで右上がりの勾配を有する仮想線１３１と左上がりの勾配を有する仮想線１３２上に分布している。仮想線１３１と１３２とは互いに交差するとともに、仮想線ｊとも交差している。縦方向Ａにおいて、圧搾部５５は、隆起部３４の頂部または頂部の周辺部分に周期的に位置するように形成されて、隆起部３４に高密度な部分を形成していることが好ましい。 In FIG. 4A, the plurality of compressed portions 55 formed at regular intervals are distributed on a virtual line 131 having a slope that rises to the right and a virtual line 132 that has a slope that rises to the left. is doing. The virtual lines 131 and 132 intersect with each other and also with the virtual line j. In the longitudinal direction A, it is preferable that the squeezed portion 55 is formed so as to be periodically located at the top of the raised portion 34 or a peripheral portion of the raised portion, thereby forming a high-density portion in the raised portion 34.

　図５の（ａ）においても複数の圧搾部５５は仮想線１３１と１３２上に位置しているが、これらの仮想線上における圧搾部５５どうしの間隔は、図４の（ｂ）における間隔とやや異なっている。 In FIG. 5 (a), the plurality of pressing parts 55 are located on the imaginary lines 131 and 132, but the interval between the pressing parts 55 on these imaginary lines is slightly different from the interval in FIG. 4 (b). Is different.

　図６の（ａ）において、複数の圧搾部５５は、輪１３３を画くように並んでいる。 6A, the plurality of pressing parts 55 are arranged so as to draw a ring 133.

　この発明の実施形態において、圧搾部５５は、身体側ライナー２を形成すべきシート材料を一対のエンボス／デボス加工用ロールの間を通過させることによって形成することができる。一対のロールのうちの一方には周面がフラットなロールを使用し、もう一方には、圧搾部５５に対応する複数のピンまたはボスが周面に形成されているロールを使用することができる。一対のロールまたは一方のロールのピンまたはボスは、第１表層２ａを形成すべきシート材料を形成している熱可塑性合成繊維を互いに融着させることができる程度に加熱しておく。ピンまたはボスの先端形状によって圧搾部５５の平面形状を規定することができるが、この発明の実施形態において、その形状には格別の規定はない。ただし、圧搾部５５としての径は０．３－３ｍｍの範囲にあることが好ましい。また、圧搾部５５が仮想線１３１や１３２の如き仮想線になるように並んでいるときには、隣り合う圧搾部５５間の距離、すなわち圧搾部５５と５５との間の隙間は０．３－５ｍｍの範囲にあることが好ましい。 In the embodiment of the present invention, the squeezing portion 55 can be formed by passing the sheet material for forming the body side liner 2 between a pair of embossing / debossing rolls. A roll having a flat peripheral surface can be used for one of the pair of rolls, and a roll in which a plurality of pins or bosses corresponding to the compressed portion 55 are formed on the peripheral surface can be used for the other. . The pair of rolls or the pins or bosses of one roll are heated to such an extent that the thermoplastic synthetic fibers forming the sheet material for forming the first surface layer 2a can be fused together. The planar shape of the compressed portion 55 can be defined by the tip shape of the pin or boss. However, the diameter of the compressed portion 55 is preferably in the range of 0.3-3 mm. When the compressed parts 55 are arranged so as to be virtual lines such as virtual lines 131 and 132, the distance between the adjacent compressed parts 55, that is, the gap between the compressed parts 55 and 55 is 0.3-5 mm. It is preferable that it exists in the range.

　図７は、第１表層２ａを得るための原反となるシート１０１の部分斜視図である。シート１０１は、繊度が１－５ｄｔｅｘ、繊維長が２０－７０ｍｍの熱可塑性合成繊維５２ａで形成されていて、１５－４０ｇ／ｍ２の単位面積当たりの質量を有していることが好ましい。シート１０１はまた、それが熱処理されていて繊維５２ａで互いに融着しているサーマルボンド不織布であってもよい。図のシート１０１は、おむつ１の縦方向Ａと横方向Ｂと厚さ方向Ｃとに対応する第１方向Ｌと第２方向Ｍと第３方向とを有している。シート１０１の上面１０１ａは、第１表層２ａの接触面５６に対応し、下面１０１ｂは第１表層２ａの非接触面５７に対応する。上面１０１ａには、斜面３４ａを有する隆起部３４が形成され、第２方向Ｍで向かい合う斜面３４ａによって溝部３６が形成されている。シート１０１ではまた、下面１０１ｂから隆起部３４の頂部までの寸法ｋが０．７－３ｍｍの範囲にあり、下面１０１ｂから溝部３６の底部までの最小寸法ｍが０．１－１ｍｍの範囲にあることが好ましい。寸法ｍは、寸法ｋよりも小さく、両寸法ｋ，ｍの差は、少なくとも０．３ｍｍであることが好ましい。シート１０１の第２方向Ｍにおける寸法１０ｍｍに対して、隆起部３４は２－５条形成されていることが好ましい。熱可塑性合成繊維５２ａは、親水化処理されている。ただし、シート１０１が第１表層２ａのみならず図１におけるサイドシート５としても使用される場合にあっては、サイドシート５として使用される部分においてのシート１０１は、親水化処理されることなく疎水性のものとして、または疎水性であって撥水化処理を施されたものとして使用されることが好ましい。なお、この発明の実施形態において繊維が親水化処理されているというときには、繊維またはその繊維で形成されている不織布等のシートとして親水化処理されていることを意味している。繊維５２ａは、繊度が１－６ｄｔｅｘ，繊維長が２０－６０ｍｍのものであることが好ましい。 FIG. 7 is a partial perspective view of the sheet 101 serving as a raw fabric for obtaining the first surface layer 2a. The sheet 101 is preferably formed of thermoplastic synthetic fiber 52a having a fineness of 1-5 dtex and a fiber length of 20-70 mm, and has a mass per unit area of 15-40 g / m 2 . The sheet 101 may also be a thermal bond nonwoven that has been heat treated and fused together with fibers 52a. The sheet 101 in the figure has a first direction L, a second direction M, and a third direction corresponding to the longitudinal direction A, the lateral direction B, and the thickness direction C of the diaper 1. The upper surface 101a of the sheet 101 corresponds to the contact surface 56 of the first surface layer 2a, and the lower surface 101b corresponds to the non-contact surface 57 of the first surface layer 2a. A raised portion 34 having a slope 34 a is formed on the upper surface 101 a, and a groove 36 is formed by the slope 34 a facing in the second direction M. In the sheet 101, the dimension k from the lower surface 101b to the top of the raised portion 34 is in the range of 0.7-3 mm, and the minimum dimension m from the lower surface 101b to the bottom of the groove 36 is in the range of 0.1-1 mm. It is preferable. The dimension m is smaller than the dimension k, and the difference between the two dimensions k and m is preferably at least 0.3 mm. For the dimension 10 mm in the second direction M of the sheet 101, it is preferable that 2-5 ridges 34 are formed. The thermoplastic synthetic fiber 52a is hydrophilized. However, when the sheet 101 is used not only as the first surface layer 2a but also as the side sheet 5 in FIG. 1, the sheet 101 in the portion used as the side sheet 5 is not subjected to a hydrophilic treatment. It is preferably used as a hydrophobic one or a hydrophobic one that has been subjected to a water repellent treatment. In the embodiment of the present invention, when the fiber is hydrophilized, it means that the fiber is hydrophilized as a sheet of a fiber or a non-woven fabric formed of the fiber. The fiber 52a preferably has a fineness of 1-6 dtex and a fiber length of 20-60 mm.

　おむつ１の第１表層２ａとして使用するシート１０１の製造方法の一例は、次のとおりである。まず、熱可塑性合成繊維５２ａで形成された一様な厚さのカードウエブを機械方向へ走行させながら機械方向に対する交差方向に所要のピッチで配置された複数のノズルから水蒸気、加熱空気または柱状水流をカードウエブの片面に対して噴射する。カードウエブは、通気性または通水性のベルトに載せて、そのベルトとともに機械方向へ走行させる。ノズルのピッチは、シート１０１における溝部３６のピッチに一致させておく。そのカードウエブは、ノズルの直下で熱可塑性合成繊維５２ａが交差方向へ再配列させることにより、密度の低い溝部３６が形成され、隣り合うノズルとノズルとの間に密度の高い隆起部３４が形成されて、シート１０１となる。熱可塑性合成繊維５２ａには、ポリエチレンやナイロン、ポリエステル等の繊維やポリエチレンとナイロンとの複合繊維やポリエチレンとポリエステルとの複合繊維等が使用される。複合繊維は、芯鞘型のものであることが好ましいが、並列型のものであってもよい。これらの繊維５２ａは、繊度が１－６ｄｔｅｘ、繊維長が２０－６０ｍｍの範囲にあるものが好ましい。また、繊維５２ａは、繊度の異なるものを組み合わせて使用することもできる。このようにして得られたシート１０１は、それに第２表層２ｂとなるべきシートをホットメルト接着剤を介して接合した後に、圧搾部５５を形成する。 An example of a method for producing the sheet 101 used as the first surface layer 2a of the diaper 1 is as follows. First, steam, heated air, or columnar water flow from a plurality of nozzles arranged at a required pitch in a direction intersecting the machine direction while running a card web of uniform thickness formed of the thermoplastic synthetic fiber 52a in the machine direction. Are sprayed onto one side of the card web. The card web is placed on a breathable or water-permeable belt and travels in the machine direction together with the belt. The nozzle pitch is made to coincide with the pitch of the groove portions 36 in the sheet 101. In the card web, the thermoplastic synthetic fibers 52a are rearranged in the crossing direction immediately below the nozzles to form a low-density groove 36, and a high-density raised portion 34 is formed between adjacent nozzles. Thus, the sheet 101 is obtained. As the thermoplastic synthetic fiber 52a, fibers such as polyethylene, nylon, and polyester, composite fibers of polyethylene and nylon, composite fibers of polyethylene and polyester, and the like are used. The composite fiber is preferably of a core-sheath type, but may be of a parallel type. These fibers 52a preferably have a fineness of 1-6 dtex and a fiber length of 20-60 mm. Moreover, the fiber 52a can also be used combining the thing from which the fineness differs. The sheet 101 obtained in this way forms the squeezed portion 55 after the sheet to be the second surface layer 2b is joined thereto via a hot melt adhesive.

　第１表層２ａに対して接合される第２表層２ｂには、例えば、ポリエチレンやナイロン、ポリエステル等の熱可塑性合成繊維やポリエチレンとポリエステルとの複合繊維やポリエチレンとポリエステルとの複合繊維等で形成された不織布を親水化処理することに使用される。その不織布はまた、エアスルー不織布であって、地合の安定しているものであることが好ましい。第２表層２ｂは１５－４０ｇ／ｍ２の単位面積当たりの質量を有し、３ｇ／ｃｍ２の質量下における厚さが０．１－０．６ｍｍの範囲にあることが好ましい。 The second surface layer 2b joined to the first surface layer 2a is formed of, for example, a thermoplastic synthetic fiber such as polyethylene, nylon, or polyester, a composite fiber of polyethylene and polyester, or a composite fiber of polyethylene and polyester. It is used to hydrophilize a non-woven fabric. The non-woven fabric is also an air-through non-woven fabric and is preferably stable in formation. The second surface layer 2b has a mass per unit area of 15-40 g / m 2 and preferably has a thickness in the range of 0.1-0.6 mm under a mass of 3 g / cm 2 .

　図８は、この発明の実施形態の一例を示す図２と同様な切断面を示す図である。図８のおむつ１では、股下域６の両側縁部１１に周知慣用のバリヤカフ８０が設けられている。バリヤカフ８０は、熱可塑性合成樹脂製のフィルムや不織布等であって、実質的に液不透過性であるシート材料によって形成されている。図示例では、図２におけるサイドシート５を横方向Ｂの内側へ延ばすことにより形成されている。バリヤカフ８０の遠位縁部８１には、縦方向Ａへ伸長状態で延びる弾性体８６が伸長状態で収縮可能に取り付けられている。 FIG. 8 is a view showing a cut surface similar to FIG. 2 showing an example of the embodiment of the present invention. In the diaper 1 of FIG. 8, a well-known and conventional barrier cuff 80 is provided on both side edges 11 of the crotch region 6. The barrier cuff 80 is a film or nonwoven fabric made of a thermoplastic synthetic resin, and is formed of a sheet material that is substantially liquid-impermeable. In the example of illustration, it forms by extending the side seat | sheet 5 in FIG. An elastic body 86 extending in the longitudinal direction A is attached to the distal edge 81 of the barrier cuff 80 so as to be contractable in the extended state.

　かようなバリヤカフ８０は、おむつの着用前では、図８において身体側ライナー２の上に対向する状態にあるが、おむつ１が着用されて縦方向Ａにおいて湾曲すると弾性体８６が収縮し、仮想線で示されているように遠位縁部８１が身体側ライナー２から着用者の肌（図示せず）に向かって離間し、体液の横方向Ｂへの流れを止めて股下域６においての体液の横漏れを防ぐことができる。 Such a barrier cuff 80 is in a state of being opposed to the body-side liner 2 in FIG. 8 before wearing the diaper. As shown by the line, the distal edge 81 is separated from the body side liner 2 toward the wearer's skin (not shown), and the flow of the body fluid in the lateral direction B is stopped, so that the Side leakage of body fluid can be prevented.

　これまでに図示したおむつ１は、テープファスナ１４を介して前後胴回り域７，８を連結する開放型のものであるが、この発明の実施形態は、前後胴回り域７，８を予め連結したプルオンおむつに適用することも可能である。 The diaper 1 shown so far is an open type that connects the front and rear waist regions 7 and 8 via the tape fastener 14, but the embodiment of the present invention is a pull-on in which the front and rear waist regions 7 and 8 are connected in advance. It can also be applied to diapers.

　以上のこの発明を要約すると、以下のとおりである。
　縦方向と、横方向と、厚さ方向とを有し、透液性の身体側ライナーと不透液性の外カバーと、前記身体側ライナーと前記外カバーとの間に介在する吸収構造体とを含む使い捨ておむつであって、
　前記身体側ライナーは、前記縦方向と前記横方向とにおいて前記吸収構造体の周縁から延出している第１表層と、前記横方向において前記周縁の内側にあり前記吸収構造体と前記第１表層との間に介在して前記第１表層に接合している第２表層とを含み、前記第１、第２表層が親水化処理された熱可塑性合成繊維によって形成されており、
　前記第１表層は、前記おむつの着用者の肌に対する接触面と、その反対面である非接触面とを有していて、前記接触面は、前記縦方向へ互いにほぼ平行して延びる複数条の隆起部と、前記横方向において隣り合う前記隆起部の間の溝部が位置し、前記非接触面は平坦に形成されており、
　前記第２表層は、前記非接触面と前記吸収構造体とに対向する両面のそれぞれが平坦に形成されており、
　前記第２表層は、前記横方向の中央に位置する内側域が接着剤を介して前記第１表層に接合し、前記横方向において前記内側域よりも外側の両側に位置する外側域が前記第１表層とともに圧搾された複数の第１圧搾部で前記第１表層に接合していることを特徴とする前記使い捨ておむつ。 The summary of the present invention as described above is as follows.
An absorbent structure having a longitudinal direction, a transverse direction, and a thickness direction, and interposed between the body-side liner and the liquid-impervious outer cover, and between the body-side liner and the outer cover Disposable diapers including
The body side liner includes a first surface layer extending from a peripheral edge of the absorbent structure in the longitudinal direction and the lateral direction, and the absorbent structure body and the first surface layer inside the peripheral edge in the lateral direction. A second surface layer that is bonded to the first surface layer, and the first and second surface layers are formed of a thermoplastic synthetic fiber that has been subjected to a hydrophilic treatment,
The first surface layer has a contact surface with respect to the skin of the wearer of the diaper and a non-contact surface opposite to the contact surface, and the contact surface extends in a plurality of strips substantially parallel to each other in the longitudinal direction. And a groove between the ridges adjacent to each other in the lateral direction, and the non-contact surface is formed flat,
Each of the second surface layer is formed flat on both surfaces facing the non-contact surface and the absorption structure,
The second surface layer has an inner region located in the center in the lateral direction joined to the first surface layer via an adhesive, and outer regions located on both sides outside the inner region in the lateral direction. The said disposable diaper characterized by joining to the said 1st surface layer in the some 1st pressing part squeezed with 1 surface layer.

　この発明は、少なくとも以下の実施形態を含むことができる。
（１）前記隆起部は、その両側に斜面を有し、前記横方向に隣り合う前記隆起部の間の前記斜面によって前記溝部が形成されている。
（２）前記横方向において前記第２表層よりも外側に位置する域の前記第１表層には、前記第１表層を前記厚さ方向において圧搾することにより複数の第２圧搾部が形成されている。
（３）前記第２表層は、前記縦方向における両端域が前記周縁の内側にあり、前記両端域には前記第２表層が前記第１表層とともに圧搾された前記第１圧搾部が複数形成され、前記縦方向において前記両端域の間に位置する中間域が前記接着剤を介して前記第１表層に接合している。
（４）前記第１表層は、前記縦方向において、前記第２表層よりも外側に位置する域にも前記第２圧搾部が形成されている。
（５）前記第１表層において、前記非接触面から前記隆起部の頂部までの寸法が０．７－３ｍｍの範囲にあり、前記横方向において向かい合う前記斜面によって形成される前記溝部間部分の底部と前記非接触面との間の寸法が前記寸法よりも小さくて０．１－１ｍｍの範囲にあり、これら両寸法の差が少なくとも０．３ｍｍである。
（６）前記第１表層の前記横方向における長さ１ｃｍ当たりについて形成されている前記隆起部の条数が２－５の範囲にある。
（７）前記第１、第２圧搾部には前記隆起部の頂部に形成されているものが含まれる。 The present invention can include at least the following embodiments.
(1) The raised portion has slopes on both sides thereof, and the groove portion is formed by the slope between the raised portions adjacent in the lateral direction.
(2) A plurality of second pressing portions are formed on the first surface layer in a region located outside the second surface layer in the lateral direction by compressing the first surface layer in the thickness direction. Yes.
(3) As for the said 2nd surface layer, the both ends area in the said vertical direction exists inside the said periphery, and the said 1st pressing part by which the said 2nd surface layer was squeezed with the said 1st surface layer is formed in the said both ends area. The intermediate region located between the both end regions in the longitudinal direction is joined to the first surface layer via the adhesive.
(4) As for the said 1st surface layer, the said 2nd pressing part is formed also in the area | region located outside the said 2nd surface layer in the said vertical direction.
(5) In the first surface layer, the dimension from the non-contact surface to the top of the raised portion is in the range of 0.7-3 mm, and the bottom of the portion between the grooves formed by the inclined surfaces facing in the lateral direction And the non-contact surface is smaller than the dimension and in the range of 0.1-1 mm, and the difference between these two dimensions is at least 0.3 mm.
(6) The number of ridges formed on the first surface layer per 1 cm length in the lateral direction is in the range of 2-5.
(7) What is formed in the top part of the said protruding part is contained in a said 1st, 2nd pressing part.

　１　　使い捨ておむつ
　２　　身体側ライナー
　２ａ　　第１表層
　２ｂ　　第２表層
　３　　外カバー
　４　　吸収構造体
　４ａ　　周縁
　３４　　隆起部
　３４ａ　　斜面
　３６　　溝部
　５２　　内側域（中央域、中間域）
　５３　　外側域（両側域）
　５５　　圧搾部
　５５ａ　　第１圧搾部
　５５ｂ　　第２圧搾部
　５６　　接触面
　５７　　非接触面
　Ａ　　縦方向
　Ｂ　　横方向
　Ｃ　　厚さ方向 DESCRIPTION OF SYMBOLS 1 Disposable diaper 2 Body side liner 2a 1st surface layer 2b 2nd surface layer 3 Outer cover 4 Absorption structure 4a Perimeter 34 Raised part 34a Slope 36 Groove part 52 Inner area (central area, middle area)
53 Outer area (Both sides)
55 pressing part 55a 1st pressing part 55b 2nd pressing part 56 contact surface 57 non-contact surface A longitudinal direction B transverse direction C thickness direction

Claims (8)

　縦方向と、横方向と、厚さ方向とを有し、透液性の身体側ライナーと不透液性の外カバーと、前記身体側ライナーと前記外カバーとの間に介在する吸収構造体とを含む使い捨ておむつであって、
　前記身体側ライナーは、前記縦方向と前記横方向とにおいて前記吸収構造体の周縁から延出している第１表層と、前記横方向において前記周縁の内側にあり前記吸収構造体と前記第１表層との間に介在して前記第１表層に接合している第２表層とを含み、前記第１、第２表層が親水化処理された熱可塑性合成繊維によって形成されており、
　前記第１表層は、前記おむつの着用者の肌に対する接触面と、その反対面である非接触面とを有していて、前記接触面は、前記縦方向へ互いにほぼ平行して延びる複数条の隆起部と、前記横方向において隣り合う前記隆起部の間の溝部が位置し、前記非接触面は平坦に形成されており、
　前記第２表層は、前記非接触面と前記吸収構造体とに対向する両面のそれぞれが平坦に形成されており、
　前記第２表層は、前記横方向の中央に位置する内側域が接着剤を介して前記第１表層に接合し、前記横方向において前記内側域よりも外側の両側に位置する外側域が前記第１表層とともに圧搾された複数の第１圧搾部で前記第１表層に接合していることを特徴とする前記使い捨ておむつ。 An absorbent structure having a longitudinal direction, a transverse direction, and a thickness direction, and interposed between the body-side liner and the liquid-impervious outer cover, and between the body-side liner and the outer cover Disposable diapers including
The body side liner includes a first surface layer extending from a peripheral edge of the absorbent structure in the longitudinal direction and the lateral direction, and the absorbent structure body and the first surface layer inside the peripheral edge in the lateral direction. A second surface layer that is bonded to the first surface layer, and the first and second surface layers are formed of a thermoplastic synthetic fiber that has been subjected to a hydrophilic treatment,
The first surface layer has a contact surface with respect to the skin of the wearer of the diaper and a non-contact surface opposite to the contact surface, and the contact surface extends in a plurality of strips substantially parallel to each other in the longitudinal direction. And a groove between the ridges adjacent to each other in the lateral direction, and the non-contact surface is formed flat,
Each of the second surface layer is formed flat on both surfaces facing the non-contact surface and the absorption structure,
The second surface layer has an inner region located in the center in the lateral direction joined to the first surface layer via an adhesive, and outer regions located on both sides outside the inner region in the lateral direction. The said disposable diaper characterized by joining to the said 1st surface layer in the some 1st pressing part squeezed with 1 surface layer. 　前記隆起部は、その両側に斜面を有し、前記横方向に隣り合う前記隆起部の間の前記斜面によって前記溝部が形成されている請求項１記載の使い捨ておむつ。 The disposable diaper according to claim 1, wherein the raised portion has inclined surfaces on both sides, and the groove portion is formed by the inclined surface between the raised portions adjacent in the lateral direction. 　前記横方向において前記第２表層よりも外側に位置する域の前記第１表層には、前記第１表層を前記厚さ方向において圧搾することにより複数の第２圧搾部が形成されている請求項１または２記載の使い捨ておむつ。 The said 2nd pressing part is formed in the said 1st surface layer of the area | region located outside the said 2nd surface layer in the said horizontal direction by pressing the said 1st surface layer in the said thickness direction. The disposable diaper according to 1 or 2. 　前記第２表層は、前記縦方向における両端域が前記周縁の内側にあり、前記両端域には前記第２表層が前記第１表層とともに圧搾された前記第１圧搾部が複数形成され、前記縦方向において前記両端域の間に位置する中間域が前記接着剤を介して前記第１表層に接合している請求項１－３のいずれかに記載の使い捨ておむつ。 In the second surface layer, both end regions in the longitudinal direction are inside the periphery, and a plurality of the first pressing parts in which the second surface layer is compressed together with the first surface layer are formed in the both end regions, The disposable diaper according to any one of claims 1 to 3, wherein an intermediate region located between the both end regions in the direction is joined to the first surface layer via the adhesive. 　前記第１表層は、前記縦方向において、前記第２表層よりも外側に位置する域にも前記第２圧搾部が形成されている請求項１－４のいずれかに記載の使い捨ておむつ。 The disposable diaper according to any one of claims 1 to 4, wherein the first pressing layer is formed in an area located outside the second surface layer in the longitudinal direction. 　前記第１表層において、前記非接触面から前記隆起部の頂部までの寸法が０．７－３ｍｍの範囲にあり、前記横方向において向かい合う前記斜面によって形成される前記溝部間部分の底部と前記非接触面との間の寸法が前記寸法よりも小さくて０．１－１ｍｍの範囲にあり、これら両寸法の差が少なくとも０．３ｍｍである請求項１－５のいずれかに記載の使い捨ておむつ。 In the first surface layer, the dimension from the non-contact surface to the top of the raised portion is in a range of 0.7-3 mm, and the bottom of the inter-groove portion formed by the inclined surfaces facing in the lateral direction and the non-surface The disposable diaper according to any one of claims 1 to 5, wherein a dimension between the contact surface and the contact surface is smaller than the dimension in a range of 0.1-1 mm, and a difference between the two dimensions is at least 0.3 mm. 　前記第１表層の前記横方向における長さ１ｃｍ当たりについて形成されている前記隆起部の条数が２－５の範囲にある請求項１－６のいずれかに記載の使い捨ておむつ。 The disposable diaper according to any one of claims 1 to 6, wherein the number of the ridges formed per 1 cm in the lateral direction of the first surface layer is in the range of 2-5. 　前記第１、第２圧搾部には前記隆起部の頂部に形成されているものが含まれる請求項１－７のいずれかに記載の使い捨ておむつ。 The disposable diaper according to any one of claims 1 to 7, wherein the first and second compressed parts include those formed at the top of the raised part.
PCT/JP2013/061727 2012-04-23 2013-04-22 Disposable diaper Ceased WO2013161734A1 (en)

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CN104958136B (en) * 2015-07-23 2018-05-01 杭州可靠护理用品股份有限公司 A kind of disposable, adult paper diaper
CN104958143B (en) * 2015-07-23 2018-05-01 杭州可靠护理用品股份有限公司 A kind of disposable, adult paper diaper
CN104958137B (en) * 2015-07-23 2017-11-14 杭州可靠护理用品股份有限公司 Adult diaper
CN104958144B (en) * 2015-07-23 2017-11-14 杭州可靠护理用品股份有限公司 Disposable, adult paper diaper
CN105030425B (en) * 2015-08-31 2018-05-01 杭州可靠护理用品股份有限公司 Degradable adult diaper
JP2022500221A (en) * 2018-09-27 2022-01-04 ザ プロクター アンド ギャンブル カンパニーThe Procter & Gamble Company Clothes-like absorbent goods

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