WO2016103959A1 - 吸収性物品、及び吸収体 - Google Patents

吸収性物品、及び吸収体 Download PDF

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Publication number
WO2016103959A1
WO2016103959A1 PCT/JP2015/081888 JP2015081888W WO2016103959A1 WO 2016103959 A1 WO2016103959 A1 WO 2016103959A1 JP 2015081888 W JP2015081888 W JP 2015081888W WO 2016103959 A1 WO2016103959 A1 WO 2016103959A1
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WIPO (PCT)
Prior art keywords
absorbent
thermoplastic resin
absorbent core
fibers
absorbent article
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PCT/JP2015/081888
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English (en)
French (fr)
Japanese (ja)
Inventor
央 橋野
野田　祐樹
竜也 田村
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ユニ・チャーム株式会社
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Publication of WO2016103959A1 publication Critical patent/WO2016103959A1/ja

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    • 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
    • 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
    • A61F13/534—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 having an inhomogeneous composition through the thickness of the pad

Definitions

  • the present disclosure relates to an absorbent article and an absorbent body.
  • an absorption holding layer composed of fluff pulp, a superabsorbent polymer, and a heat-sealable synthetic resin fiber, and a heat-sealable synthetic resin disposed on the surface sheet side of the absorption holding layer
  • An absorber having a nonwoven fabric layer made of fibers is known (Patent Document 1).
  • the heat-fusible synthetic resin fibers included in the absorption holding layer are entangled or heat-sealed.
  • the heat-fusible synthetic resin fibers contained in the absorption holding layer and the heat-fusible synthetic resin fibers contained in the nonwoven fabric layer are heat-fused.
  • An absorbent article comprising a liquid permeable layer, a liquid impermeable layer, and an absorbent body provided between the liquid permeable layer and the liquid impermeable layer, wherein the absorbent body is A first portion including a thermoplastic resin fiber and a cellulose-based water-absorbing fiber, wherein at least a part of the thermoplastic resin fiber is exposed on a surface of the absorbent body on the liquid-permeable layer side; and the absorbent body.
  • Patent Document 2 the absorbent article characterized by being 100 Pa or more is known.
  • Patent Document 1 in order to prevent the body fluid absorption holding layer from collapsing, the absorption holding layer and the nonwoven fabric layer are heat-sealed at their contact surfaces, the bonding strength between them is improved, and absorption holding is performed.
  • a design is made to prevent twisting of the wearing article by thermally fusing the fusible synthetic resin fibers in the layer.
  • the wearing article described in Patent Document 1 the wearing article becomes difficult to sway by increasing the amount of heat fusion, but the wearing article tends to be hard.
  • the present disclosure is an absorbent article comprising a liquid-permeable layer, a liquid-impermeable layer, and an absorbent body between the liquid-permeable layer and the liquid-impermeable layer, wherein the absorbent body And an absorbent core comprising a thermoplastic resin fiber and a cellulosic water-absorbing fiber and having one surface and the other surface, and a covering sheet covering the one surface, wherein the absorbent core is the thermoplastic resin.
  • a fiber having a first portion exposed on the one surface, a second portion exposed on the other surface, and a connecting portion connecting the first portion and the second portion is included.
  • the amount of the thermoplastic resin fibers present on the other surface of the absorbent core is greater than the amount of the thermoplastic resin fibers present on the one surface, and the absorbent comprises at least the absorbent core and By embossing the coated sheet Including the formed embossed part, and the absorbent body being bonded to a layer adjacent to the skin side of the absorbent body and a layer adjacent to the clothing side of the absorbent body with an adhesive portion interposed therebetween.
  • the above-described absorbent article was found.
  • the absorbent article of the present disclosure is soft and difficult to twist.
  • FIG. 1 is a plan view of an absorbent article 1 according to one of the first embodiments.
  • FIG. 2 is a plan view of the absorber 3 shown in FIG.
  • FIG. 3 is an end view taken along the line III-III in FIG.
  • FIG. 4 is an end view taken along the IV-IV end face of FIG.
  • FIG. 5 is an end view taken along the VV end face of FIG.
  • FIG. 6 is a diagram for explaining a method for measuring tensile strength.
  • FIG. 7 is a diagram illustrating a method for manufacturing an absorbent body of an absorbent article according to one embodiment of the present disclosure.
  • thermoplastic fiber As used herein, “exposed” with respect to thermoplastic fiber means that the thermoplastic fiber is present on one surface or the other surface of the absorbent core.
  • thermoplastic resin fibers and cellulose-based water-absorbing fibers other than pulp fibers are defined in “Appendix A” of JIS L 1015: 2010. Measurement is performed according to “A7.1.1 Method of measuring length of individual fibers on glass plate with A method (standard method) scale” in “A7.1 Measurement of fiber length”. The above method is a test method corresponding to ISO 6989 issued in 1981.
  • the average fiber length of the pulp fiber means a weight-weighted average fiber length, and Kajaani Fiber Lab fiber properties (off-line) manufactured by Metso Automation Co., Ltd. (off-line). Means the L (w) value measured by
  • the “melting point” of a thermoplastic resin fiber is a peak top temperature of an endothermic peak when changing from a solid state to a liquid state when measured at a heating rate of 10 ° C./min with a differential scanning calorimeter.
  • a differential scanning calorimeter examples include a DSC-60 type DSC measuring apparatus manufactured by Shimadzu Corporation.
  • FIG. 1 is a plan view of an absorbent article 1, specifically a sanitary napkin, according to one of the embodiments of the present disclosure (first embodiment).
  • the left side of the absorbent article 1 shown in FIG. 1 is the front.
  • the absorbent article 1 according to the first embodiment includes a top sheet 2 as a liquid-permeable layer, an absorber 3, and a liquid-impermeable back sheet (a liquid-impermeable layer). (Not shown).
  • the absorbent article 1 includes a side sheet 4 a, a seal part 4 b formed by sealing an end of the absorbent article 1, a top sheet 2, and It has the embossed part 5 formed by embossing the absorber 3.
  • the side sheet, the seal portion, and the embossed portion formed by embossing the liquid permeable layer and the absorbent body are arbitrary, and the absorbent article according to another embodiment of the present disclosure is a side sheet. , No seal and / or emboss.
  • FIG. 2 is a plan view of the absorber 3 shown in FIG. 1
  • FIG. 3 is an end view at the III-III end face of FIG. 2
  • FIG. 4 is an end view at the IV-IV end face of FIG.
  • FIG. 5 is an end view taken along the line VV of FIG. 2 to 5
  • the thermoplastic resin fibers 16 are shown to be thick and long, and the cellulosic water-absorbing fibers 17 are shown to be thinner and shorter than the thermoplastic resin fibers 16. 2-5 do not reflect their actual length and thickness. Moreover, the thickness of each component of the absorbent article 1 does not reflect the actual one.
  • the absorbent body 3 in the first embodiment includes an absorbent core 13 that includes a thermoplastic resin fiber and a cellulosic water-absorbing fiber and has one surface 11 and the other surface 12, and a covering sheet 14 that covers the one surface 11.
  • the absorber 3 in 1st Embodiment is formed by embossing the absorption core 13 and the coating sheet 14, and contains the some embossing part 15 arrange
  • the absorption core 13 connects the first part 16a exposed on one surface 11, the second part 16b exposed on the other surface 12, and the first part 16a and the second part 16b.
  • a thermoplastic resin fiber 16 having a connecting portion 16c and a cellulosic water-absorbing fiber 17 are included.
  • the amount of the thermoplastic resin fibers 16 existing on the other surface 12 of the absorbent core 13 is larger than the amount of the thermoplastic resin fibers 16 existing on the one surface 11.
  • the absorbent body 3 includes an embossed portion formed by embossing the absorbent core 13 and the covering sheet 14.
  • the absorbent body 3 is bonded to a layer adjacent to the skin side of the absorbent body 3, i.e., the top sheet 2 with the adhesive portion 21 interposed therebetween.
  • the covering sheet 14 of the absorbent body 3 is joined to the top sheet 2 with the adhesive portion 21 interposed therebetween.
  • the absorber 3 is joined to the layer adjacent to the clothing side of the absorber 3, ie, the back seat
  • the absorbent article 1 has the fixing
  • the absorbent core includes thermoplastic resin fibers and cellulosic water-absorbing fibers, and at least a part of the thermoplastic resin fibers includes the absorbent core.
  • a first portion exposed on one surface of the absorbent core, a second portion exposed on the other surface of the absorbent core, and a connecting portion connecting the first portion and the second portion (hereinafter referred to as “specific”). May be referred to as “thickness direction orientation”).
  • the thermoplastic resin fiber functions as a skeleton for holding other components of the absorbent core, for example, the cellulosic water-absorbing fiber, and the strength of the absorbent core is improved.
  • the absorption core does not include the thermoplastic resin fiber, for example, absorption including only pulp fibers. It becomes harder to twist than the core.
  • the amount of the thermoplastic resin fiber present on the other surface of the absorbent core is larger than the amount of the thermoplastic resin fiber present on the one surface of the absorbent core (hereinafter, Sometimes referred to as "specific planar orientation").
  • specific planar orientation the amount of the thermoplastic resin fiber present on the one surface of the absorbent core.
  • a pseudo nonwoven fabric layer of thermoplastic resin fibers is formed on the other surface of the absorbent core, the strength in the planar direction on the other surface of the absorbent core is increased, and the other surface of the absorbent core is adjacent to the layer.
  • the bonding strength between the two can be increased.
  • the amount of the thermoplastic resin fiber can be directly compared from the images obtained by photographing one surface and the other surface of the absorbent core at a normal magnification using a microscope (for example, a scanning electron microscope).
  • thermoplastic resin fibers examples include those containing a single component, for example, single fibers, or those containing a plurality of components, for example, composite fibers.
  • the above components include polyethylene, polypropylene, polybutylene, ethylene-vinyl acetate copolymer, ethylene-ethyl acrylate copolymer, ethylene-acrylic acid copolymer, polyolefin such as ionomer resin; polyethylene terephthalate (PET), poly Examples include butylene terephthalate (PBT), polytrimethylene terephthalate (PTT), polyester such as polylactic acid; polyamide such as nylon.
  • the composite fibers include, for example, composite fibers such as core-sheath fibers, side-by-side fibers, and island / sea fibers; hollow fibers; irregular fibers such as flat, Y-type, and C-types; latent crimps or manifestations Three-dimensional crimped fibers of crimps; split fibers that are split by physical load such as water flow, heat, embossing, etc., and core-sheath fibers that are obtained industrially inexpensively and have high safety, PET / PE, PP / PE (core / sheath) and the like are preferable.
  • the mass ratio of core component / sheath component is preferably about 10/90 to about 90/10, and more preferably about 30/70 to about 70/30.
  • the ratio of the sheath component is small, the fusibility decreases, and when the ratio of the sheath component increases, the spinnability tends to decrease.
  • cellulose-based water-absorbing fibers examples include pulp fibers, for example, non-wood such as wood pulp fibers, bagasse fibers, kenaf fibers, bamboo fibers, hemp fibers, cotton fibers (for example, cotton linters) obtained from conifers or hardwoods.
  • pulp fibers examples include pulp fibers; regenerated cellulose fibers such as rayon fibers; semisynthetic fibers such as acetate fibers.
  • the pulp fiber is preferably kraft pulp fiber that is industrially inexpensive and highly safe.
  • the average fiber length of the cellulosic water-absorbing fiber is not particularly limited.
  • the cellulose-based water-absorbing fibers are regenerated cellulose fibers, semi-synthetic fibers, etc., they can have an average fiber length of about 3 to about 70 mm, about 5 to about 50 mm, about 10 to about 40 mm, etc.
  • the regenerated cellulose fiber, semi-synthetic fiber and the like have the same function as the thermoplastic resin fiber during drying, and can impart difficulty to the absorbent body.
  • the absorbent core preferably comprises about 5 to about 50 parts by weight and about 50 to about 95 parts by weight of thermoplastic resin fibers and cellulosic water-absorbing fibers, respectively, based on a total of 100 parts by weight thereof, and More preferably, it is contained in a ratio of about 10 to about 40 parts by weight and about 60 to about 90 parts by weight.
  • the ratio of the thermoplastic resin fiber is less than about 5 parts by mass, the strength of the absorbent core tends to be insufficient, and the absorbent core tends to twist, and when the ratio of the thermoplastic resin fiber exceeds 50 parts by mass , The absorbent core tends to have insufficient liquid absorbency.
  • the thermoplastic resin fibers preferably have an average fiber length of about 6 to about 70 mm, more preferably about 10 to about 50 mm, and even more preferably about 15 to about 40 mm.
  • the average fiber length is less than about 6 mm, the thermoplastic resin fiber tends to have difficulty in having a specific thickness direction orientation, and the thermoplastic resin fiber is another thermoplastic resin fiber and / or cellulose. It tends to be difficult to entangle with the water-absorbing fiber.
  • the average fiber length exceeds about 70 mm, the opening property of the thermoplastic resin fiber is remarkably lowered, and the absorption core is not opened, and the absorption core has uniformity. There is a tendency to decrease.
  • the average fiber length is particularly preferable when the absorbent core is mixed with cellulosic water-absorbing fibers such as pulp fibers by the airlaid system.
  • the thermoplastic fiber preferably has a fineness of about 0.5 to about 10 dtex, and more preferably about 1.5 to about 5 dtex.
  • the fineness is less than about 0.5 dtex, the openability of the thermoplastic resin fibers may be reduced, and when the fineness exceeds 10 dtex, the number of thermoplastic resin fibers decreases, and other thermoplastics There is a tendency that the number of points entangled with resin fibers and / or cellulosic water-absorbing fibers is reduced.
  • the tensile strength in the thickness direction of the absorbent core is preferably 100 Pa or more, more preferably 150 Pa or more, still more preferably 200 Pa or more, and even more preferably 250 Pa or more.
  • the tensile strength is less than 100 Pa, the amount of the thermoplastic resin fiber having a specific orientation in the thickness direction in the absorbent core, the amount of the embossed portion of the absorber, etc. are insufficient, and the strength of the absorbent core is weak, There exists a tendency for an absorber to become easy to twist.
  • the upper limit of the tensile strength of the thickness direction of an absorption core is not specifically limited, From a soft viewpoint, it is 3,000 Pa or less.
  • the tensile strength is measured as follows using the apparatus shown in FIG. (1) A pair of acrylic jigs 51 (diameter 68 mm, mass of each jig: 200 g, height of the grip portion 51 a: 50 mm) is prepared. (2) A sample 52 having a diameter of 68 mm is prepared from the absorbent core. (3) Two sheets of double-sided tape 53 (manufactured by 3M, adhesive transfer tape 950) cut out to a diameter of 68 mm are prepared.
  • the sample 52 is fixed to a pair of jigs 51 using two double-sided tapes 53.
  • a pair of jigs 51 having the sample 52 is placed on the holding base 55, and a weight 54 (10.5 kg) is placed thereon, and left for 3 minutes.
  • a pair of jigs 51 are set in a tensile tester (Shimadzu Corporation, AG-1kNI) with a gripping interval of 70 mm.
  • the thermoplastic resin fiber is preferably at least about twice the thickness of the absorbent core, more preferably at least about 3 times, even more preferably at least about 4 times, even more preferably at least about 5 times. And even more preferably has an average fiber length of about 7 times or more. If the magnification is less than about 2 times, it tends to be difficult for the thermoplastic resin fibers to have a specific thickness direction orientation.
  • the thermoplastic fiber has an average fiber length that is preferably about 30 times or less, more preferably about 20 times or less, and even more preferably about 15 times or less the thickness of the absorbent core. .
  • the magnification is more than about 30 times, the opening of the thermoplastic resin fibers becomes insufficient, and the thermoplastic resin fibers tend to have a specific thickness direction orientation and a specific plane direction orientation. .
  • the covering sheet may cover one surface of the absorbent core and may not cover the other surface of the absorbent core. This is because a pseudo non-woven fabric layer of thermoplastic resin fibers is formed on the other surface of the absorbent core, so that even if the other surface is not coated with a covering sheet, it has excellent resistance to warping.
  • the covering sheet may cover the other surface of the absorbent core.
  • the covering sheet is not particularly limited, and those used for absorbent articles in the present technical field can be adopted without limitation, but the covering sheet preferably includes thermoplastic resin fibers. It is because it can join with the thermoplastic resin fiber of an absorption core.
  • the covering sheet include fabrics such as nonwoven fabrics and woven fabrics, synthetic resin films formed with liquid permeable holes, and the nonwoven fabrics include, for example, air-through nonwoven fabrics, spunbond nonwoven fabrics, airlaid nonwoven fabrics, etc. And airlaid pulp.
  • the thermoplastic resin fiber that can be included in the covering sheet include those equivalent to the thermoplastic resin fiber included in the absorbent core.
  • the absorbent body includes at least an embossed portion formed by embossing the absorbent core and the covering sheet.
  • the absorbent core is equivalent to including thermoplastic resin fibers having a substantially longer average fiber length;
  • the thermoplastic resin fiber has a higher function as a skeleton for holding other fibers, for example, cellulosic water-absorbing fibers, compared to the case where no embossed portion is included, and the strength of the absorbent core is improved.
  • thermoplastic resin fiber resins are connected to each other on the other surface of the absorbent core, the strength of the pseudo nonwoven fabric layer formed on the other surface is improved, and mainly the strength in the planar direction of the absorbent core is improved. To do. (Iii) Since the covering sheet and the absorbent core are joined by the embossed portion, delamination between the covering sheet and the absorbent core is difficult, and peeling inside the absorbent core is difficult, and the absorbent article It becomes difficult to drool.
  • thermoplastic resin fibers of the absorbent core are fused with other fibers of the absorbent core, such as cellulosic water-absorbing fibers and thermoplastic resin fibers.
  • other fibers of the absorbent core such as cellulosic water-absorbing fibers and thermoplastic resin fibers.
  • thermoplastic resin fibers of the covering sheet are fibers constituting the absorbent core, for example, thermoplastic resin fibers or cellulosic water-absorbing fibers, particularly thermoplastic. It is preferably fused with the resin fiber. This is from the viewpoint of the above effect.
  • thermoplastic resin fiber is not fused with the cellulosic water-absorbing fiber and / or other thermoplastic resin fiber at a place other than the embossed portion.
  • the absorbent core is difficult to sway, but tends to become hard.
  • the area ratio of the embossed portion to the absorbent body area is preferably 1 to 20%, more preferably 2 to 15%, and further preferably 3 to 10%.
  • the area ratio is less than 1%, the action of the embossed portion tends not to appear, and when the area ratio is more than 10%, the absorbent body is difficult to kink, but the wearer feels the firmness to the absorbent body.
  • the “area of the absorber” and “area of the embossed part” mean the area when the absorber is observed in the thickness direction.
  • the shape of the embossed part of the absorber is not particularly limited, and examples of the shape of the embossed part include a dotted embossed part and a linear embossed part.
  • Examples of the dot-like embossed portion include a circle, an ellipse, a rectangle, a triangle, a star, and a heart shape.
  • the arrangement of the embossed portions is not particularly limited, and examples thereof include a zigzag pattern such as a square zigzag pattern and a 60 ° zigzag pattern.
  • the interval between the individual embossed portions is preferably 2.0 times or less, more preferably 1.0 times or less, more preferably 0.7 times the average fiber length of the thermoplastic resin fibers contained in the absorbent core. It is not more than twice, and more preferably not more than 0.5 times.
  • the interval is longer than 2.0 times the average fiber length of the thermoplastic resin fibers, the thermoplastic resin fibers fixed to different embossed portions are not entangled with each other, and the strength of the absorbent core is hardly improved.
  • the interval is 0.5 times or less of the average fiber length of the thermoplastic resin fibers, one thermoplastic resin fiber may be fixed to a plurality of embossed portions, so that the strength of the absorbent core is increased. Easy to improve.
  • each embossed portion preferably has an area of 0.1 to 20.0 mm 2 , more preferably 1.0 to 15.0 mm 2 , and still more preferably 2.0 to 10.0 mm 2. .
  • the area is less than 0.1 mm 2 , the protrusion of the embossing roll when forming the embossed part becomes an acute angle, the absorbent core or the covering sheet may be torn, and when the area exceeds 20.0 mm 2 , Absorber tends to harden.
  • the absorbent body is bonded to the layer adjacent to the skin side of the absorbent body and the layer adjacent to the clothing side of the absorbent body with the adhesive portion interposed therebetween.
  • the other surface of the absorbent core is formed with a pseudo-nonwoven fabric layer made of thermoplastic resin fibers. It is firmly bonded to the layer adjacent to the skin side or the layer adjacent to the clothing side of the absorbent body.
  • the adhesive part can be formed by an adhesive known in the art without particular limitation.
  • the adhesive may be formed by a coating method such as spiral coating, coater coating, curtain coater coating, summit gun coating, or the like.
  • Examples of the layer adjacent to the skin side of the absorber include a liquid permeable layer (for example, a top sheet), a liquid diffusion layer, and the like. Examples of the layer adjacent to the clothing side of the absorbent body include a liquid impermeable layer.
  • the absorbent body 3 does not include an adhesive portion between the absorbent core 13 and the covering sheet 14, but the absorbent according to another embodiment of the present disclosure.
  • the absorbent body includes an adhesive portion between the absorbent core and the covering sheet.
  • One surface of the absorbent core has a reduced amount of thermoplastic fibers (compared to the other surface), but the presence of an adhesive between the absorbent core and the cover sheet allows the bonding between them. Becomes stronger, it becomes difficult to delaminate between them, and as a result, the absorbent article becomes difficult to sway.
  • the covering sheet 14 is bonded to the top sheet 2 with the adhesive portion 21 interposed therebetween.
  • the bond between the covering sheet and the absorbent body is strengthened, and delamination between them is difficult, and as a result, the absorbent article is not easily swayed.
  • the covering sheet is bonded to a layer adjacent to the clothing side of the absorbent body, for example, a liquid-impermeable layer, with the adhesive portion interposed therebetween.
  • the other surface 12 of the absorbent core 13 is joined to the back sheet 23 with the adhesive portion 22 interposed therebetween.
  • the back sheet is composed of a film layer. It is preferable.
  • a pseudo non-woven fabric layer made of thermoplastic resin fibers is formed, the bond between the pseudo non-woven fabric layer and the film layer becomes strong, and delamination between them becomes difficult, and as a result It is because an absorbent article becomes difficult to sway.
  • the other surface of the absorbent core is bonded to the film layer constituting the absorbent article.
  • the film layer include a liquid impermeable layer and a liquid permeable layer, for example, a synthetic resin film in which liquid permeable holes are formed.
  • the surface of the side joined to an absorber is smooth. This is because the bonding between the film layer and the pseudo-nonwoven fabric layer (the thermoplastic resin fiber constituting the film layer) becomes stronger.
  • the absorbent article is for fixing the absorbent article to the clothing on the clothing side surface of the liquid impermeable layer, as in the first embodiment. It is preferable to have a fixing part. This is because the bonding between the absorbent article and the clothes becomes strong, and the absorbent article is less likely to sway.
  • the fixing part is formed of an adhesive or the like known in the art.
  • the preferred thickness of the absorbent body varies depending on the use of the absorbent article and the like, but is generally about 0.1 to about 15 mm, preferably about 1 to about 10 mm, and more preferably. Has a thickness of about 2 to about 5 mm.
  • the thickness (mm) of the absorber is measured as follows.
  • FS-60DS Measurement surface 44 mm (diameter), measurement pressure 3 g / cm 2 ] manufactured by Daiei Kagaku Seisakusho Co., Ltd. is prepared and absorbed under standard conditions (temperature 23 ⁇ 2 ° C., relative humidity 50 ⁇ 5%). Pressurize five different parts of the body, measure the thickness of each part 10 seconds after pressurization, and take the average of the five measured values as the thickness of the absorber.
  • the absorbent is generally from about 20 to about 1000 g / m 2 , preferably from about 50 to about 800 g / m 2 , and more preferably from about 100 to about 500 g / m 2 .
  • Have quantity This is from the viewpoint of the strength and absorbability of the absorber.
  • the absorbent core is preferably about 0.06 to about 0.14 g / cm 3 , more preferably about 0.07 to about 0.12 g / cm 3 , and even more preferably about 0.00. It has a density of 08 to about 0.1 g / cm 3 .
  • the density can be calculated from the basis weight and thickness of the absorber.
  • the said basic weight is measured according to "6.2 Mass per unit area (ISO method)" of JIS L 1913: 2010.
  • the absorbent core preferably further includes a superabsorbent material.
  • the absorbent core contains the superabsorbent material, preferably from about 5 to about 80%, more preferably from about 10 to about 60%, and even more preferably from about 20 to about 40% by total weight of the absorbent core. Including in the range of mass%.
  • the superabsorbent material include starch, cellulose, and synthetic polymer superabsorbent materials.
  • the present disclosure is also an absorbent body for an absorbent article, wherein the absorbent body includes a thermoplastic resin fiber and a cellulosic water absorbent fiber and has one surface and the other surface; A coating sheet covering the surface, wherein the absorbent core is a first portion exposed on the one surface of the thermoplastic resin fibers, and a second portion exposed on the other surface, A thermoplastic resin in which the amount of the thermoplastic resin fiber existing on the other surface of the absorbent core is present on the one surface, including the one having a first portion and a connecting portion connecting the second portion.
  • the said absorber includes the embossed part formed by embossing at least the said absorption core and the said coating sheet, It is related with the absorber characterized by the above-mentioned. Since details have been described in relation to the absorbent article, description thereof will be omitted.
  • FIG. 7 is a diagram for explaining a method of manufacturing an absorbent body and an absorbent article according to one embodiment of the present disclosure.
  • the suction drum 101 that rotates in the machine direction MD has a plurality of recesses 103 that extend from the peripheral surface 101a toward the center of the suction drum and are arranged at a predetermined pitch as a mold for filling the peripheral surface 101a with the absorbent material.
  • the material supply unit 102 having the hood 102a is formed so as to cover the suction drum 101, and has a transport path 104 for the opened thermoplastic resin fibers and a transport path 105 for the opened cellulosic water absorbent fibers. It is connected.
  • the thermoplastic resin fiber conveyance path 104 and the cellulosic water absorbent fiber conveyance path 105 are respectively opened to the material supply unit 102 by the opened thermoplastic resin fiber, and the opened cellulose water absorbent fiber. Is supplied by pneumatic conveyance.
  • the thermoplastic resin fiber conveyance path 104 is arranged upstream of the cellulose-based water absorbent fiber conveyance path 105 in the deposition of the absorbent material.
  • the material supply unit 102 includes a supply unit 107 that supplies the highly water-absorbing material 106, and supplies the highly water-absorbing material 106 to the recess 103.
  • a supply unit 107 that supplies the highly water-absorbing material 106, and supplies the highly water-absorbing material 106 to the recess 103.
  • the hood 102a of the material supply 102 is commonly used in the art upstream of the absorbent material deposition. It has a larger deposition space 102b than the hood used.
  • the absorbent raw material tends to be deposited in order from the concave portion 103a on the downstream side of the rotation of the suction drum of the concave portion 103 toward the concave portion 103b on the upstream side of the rotation.
  • a thickness direction orientation A technique for orienting thermoplastic resin fibers in the thickness direction is described in International Publication No. 2014/199714.
  • the conveyance path 104 for thermoplastic resin fibers is arranged upstream of the conveyance path 105 for cellulose-based water-absorbing fibers, so that the ratio of the thermoplastic resin fibers in the deposition space 102b is increased. It becomes relatively high and is likely to be preferentially deposited on the bottom of the recess 103, and a pseudo nonwoven fabric layer of thermoplastic resin fibers is formed on the bottom of the recess 103.
  • the absorbent core 111 formed in the concave portion 103 moves onto the carrier sheet 112 having the adhesive applied from the coating machine 121 thereon, and the continuous absorbent body 113 composed of the absorbent core 111 and the carrier sheet 112. Form.
  • the carrier sheet 112 will form a cover sheet later.
  • an embossed portion is formed on the continuous absorber 113 by the embossing device 201 including a pair of embosses, and then the continuous absorber 113 is cut by the cutting device 301 to form the absorber 114.
  • the absorbent article of the present disclosure can be manufactured by a method known in the art using the absorber 114 described above.
  • the temperature of the embossing roll in the embossing device has a predetermined relationship with the melting point of the thermoplastic resin fibers constituting the absorbent core.
  • the temperature is preferably a temperature at which a part of the thermoplastic resin fiber melts.
  • the temperature is a sheath-core type composite fiber. It is preferable that a part of is above the temperature at which melting starts.
  • the temperature of the embossing roll is usually about 80 to about 160 ° C., preferably about 120 to about 160 ° C.
  • the pressure is usually about 10 to about 3000 N / mm, preferably about 50 to about 500 N / mm
  • the processing time Is usually about 0.0001 to about 5 seconds, preferably about 0.005 to about 2 seconds.
  • Laminate No. 1 comprising 1 (including pulp and thermoplastic resin fibers in a mass ratio of 80:20, basis weight: 240 g / m 2 ) and a covering sheet (commercially available air-through nonwoven fabric, basis weight: 30 g / m 2 ) . 1 was obtained.
  • the thermoplastic resin fiber was a core-sheath fiber having a core of polyethylene terephthalate and a sheath of polyethylene, an average fiber length of 30 mm, and a fineness of 2.2 dtex.
  • the embossing roll has pin embossed portions with a diameter of 3.0 mm arranged in a staggered pattern with respect to the MD direction, and the center-to-center distance between the pin embossed portions is 11 mm ⁇ 11 mm (MD direction ⁇ CD direction) It had an embossing roll and a plain roll.
  • the embossing roll temperature was 110 ° C.
  • the pressure was 1.73 kPa / mm 2
  • the embossing time was 20 seconds.
  • Absorber No. 1 each embossed part had an area of about 7.1 mm 2 , the area ratio of the embossed part was 11.7%, and the distance between the embossed parts was 8 mm.
  • Absorber No. A hot-melt adhesive (basis weight: 5 g / m 2 ) was applied in a spiral shape on one coating sheet, and a commercially available air-through nonwoven fabric (basis weight: 30 g / m 2 ) was laminated thereon. Next, the absorbent body No. Hot melt adhesive (basis weight: 5 g / m 2 ) is spirally coated on the other surface of one absorbent core, and a polyethylene sheet (basis weight: 23 g / m 2 ) is laminated thereon. By doing so, the absorbent article no. 1 was produced.
  • the tensile strength of 1 was 240 Pa. Further, when confirmed with a scanning electron microscope, the absorption core No. The amount of the thermoplastic resin fibers on the other surface of 1 (the surface on which the coating sheet does not exist) was larger than the amount of the thermoplastic resin fibers on one surface (the surface adjacent to the thermoplastic resin fibers).
  • Absorption core No. 2 was manufactured according to the manufacture example 7 of the international publication 2014/199714 pamphlet. Next, the absorption core No. 2 is the absorption core no. Absorbent article No. 1 was prepared in accordance with Production Example 1 except that it was replaced with No. 1. 2 was produced. Absorption core No. The tensile strength of 2 was 270 Pa.
  • Example 1 To a plurality of subjects, the absorbent article No. 1 and no. 2 was worn, the absorbent article no. Many respondents said that 1 was more difficult.

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  • Health & Medical Sciences (AREA)
  • Epidemiology (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Vascular Medicine (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Absorbent Articles And Supports Therefor (AREA)
PCT/JP2015/081888 2014-12-26 2015-11-12 吸収性物品、及び吸収体 WO2016103959A1 (ja)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11266542B2 (en) 2017-11-06 2022-03-08 The Procter & Gamble Company Absorbent article with conforming features

Families Citing this family (4)

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JP6744211B2 (ja) * 2016-12-28 2020-08-19 花王株式会社 吸収性物品
JP7412979B2 (ja) * 2019-11-26 2024-01-15 ユニ・チャーム株式会社 吸収性物品、及び、吸収性物品の製造方法
JP7412978B2 (ja) * 2019-11-26 2024-01-15 ユニ・チャーム株式会社 吸収性物品
JP2023091657A (ja) * 2021-12-20 2023-06-30 ユニ・チャーム株式会社 吸収性物品

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10216172A (ja) * 1997-02-06 1998-08-18 Kao Corp 吸収性物品
JP2003291234A (ja) * 2002-03-29 2003-10-14 Uni Charm Corp 吸収性物品およびその製造方法
WO2013154072A1 (ja) * 2012-04-10 2013-10-17 ユニ・チャーム株式会社 吸収性物品
WO2014200026A1 (ja) * 2013-06-11 2014-12-18 ユニ・チャーム株式会社 吸収性物品

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10216172A (ja) * 1997-02-06 1998-08-18 Kao Corp 吸収性物品
JP2003291234A (ja) * 2002-03-29 2003-10-14 Uni Charm Corp 吸収性物品およびその製造方法
WO2013154072A1 (ja) * 2012-04-10 2013-10-17 ユニ・チャーム株式会社 吸収性物品
WO2014200026A1 (ja) * 2013-06-11 2014-12-18 ユニ・チャーム株式会社 吸収性物品
WO2014199714A1 (ja) * 2013-06-11 2014-12-18 ユニ・チャーム株式会社 吸収体、及び当該吸収体を含む吸収性物品

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11266542B2 (en) 2017-11-06 2022-03-08 The Procter & Gamble Company Absorbent article with conforming features
US11857397B2 (en) 2017-11-06 2024-01-02 The Procter And Gamble Company Absorbent article with conforming features
US11864982B2 (en) 2017-11-06 2024-01-09 The Procter And Gamble Company Absorbent article with conforming features
US11890171B2 (en) 2017-11-06 2024-02-06 The Procter And Gamble Company Absorbent article with conforming features
US12310825B2 (en) 2017-11-06 2025-05-27 The Procter & Gamble Company Absorbent article with conforming features
US12336890B2 (en) 2017-11-06 2025-06-24 The Procter & Gamble Company Absorbent article with conforming features

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