WO2017061568A1 - シート状物及びシート状物の製造方法 - Google Patents
シート状物及びシート状物の製造方法 Download PDFInfo
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- WO2017061568A1 WO2017061568A1 PCT/JP2016/079845 JP2016079845W WO2017061568A1 WO 2017061568 A1 WO2017061568 A1 WO 2017061568A1 JP 2016079845 W JP2016079845 W JP 2016079845W WO 2017061568 A1 WO2017061568 A1 WO 2017061568A1
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- sheet
- water
- absorbing polymer
- absorbent
- polymer particles
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- 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
- A61F2013/530131—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 being made in fibre but being not pulp
- A61F2013/530226—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 being made in fibre but being not pulp with polymeric fibres
-
- 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
- A61F2013/530131—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 being made in fibre but being not pulp
- A61F2013/530226—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 being made in fibre but being not pulp with polymeric fibres
- A61F2013/530233—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 being made in fibre but being not pulp with polymeric fibres being thermoplastic fibres
-
- 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
- A61F2013/530131—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 being made in fibre but being not pulp
- A61F2013/530226—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 being made in fibre but being not pulp with polymeric fibres
- A61F2013/530299—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 being made in fibre but being not pulp with polymeric fibres being hydrophilic fibres
-
- 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
- A61F2013/530481—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 superabsorbent materials, i.e. highly absorbent polymer gel materials
-
- 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
- A61F2013/530868—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 characterized by the liquid distribution or transport means other than wicking layer
-
- 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
- A61F13/531—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 a homogeneous composition through the thickness of the pad
- A61F2013/5315—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 a homogeneous composition through the thickness of the pad with a tissue-wrapped core
-
- 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
- A61F2013/5349—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 being a tissue-wrapped core
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/70—Other properties
- B32B2307/726—Permeability to liquids, absorption
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2555/00—Personal care
- B32B2555/02—Diapers or napkins
Definitions
- the present invention relates to a sheet-like material used for an absorbent article and a method for producing the sheet-like material.
- the present invention also relates to absorbent articles such as disposable diapers.
- an absorbent used for absorbent articles such as disposable diapers, sanitary napkins, incontinence pads, etc. is prepared by placing an absorbent material containing pulp fibers and a water-absorbing polymer on an outer peripheral surface of a rotating drum on an air stream. It is manufactured by sucking and depositing in the formed recess, and then covering the piled body deposited in the recess with a water-permeable sheet material.
- the weight of the water-absorbing polymer is very heavy compared to the weight of the pulp fiber, and the water-absorbing polymer is likely to be non-uniformly dispersed. In such a non-uniform absorbent body, swelling inhibition such as gel blocking is likely to occur, and the absorption performance of the water-absorbing polymer cannot be maximized.
- Patent Document 1 two sheets are fixed by a plurality of fixing portions to form a channel space that is continuous in the longitudinal direction between adjacent fixing portions, and each channel space has a high water absorption property.
- a body fluid absorber is described in which an absorbent material in which a body fluid absorbent material containing a polymer is integrated with a shrinkable material is disposed. According to the bodily fluid absorber described in Patent Document 1, the entire absorber can be used effectively.
- patent document 2 it has the excretion part slit area
- An absorbent article with an absorber is described. According to the absorbent article described in Patent Document 2, it is possible to enhance the feeling of wearing.
- Patent Document 3 describes an absorbent article having an absorbent body in which four or more rows of slits are arranged at intervals. According to the absorbent article described in Patent Document 3, the rigidity of the absorber can be relaxed and the absorbency can be increased.
- Patent Document 3 and Patent Document 5 disclose an absorbent body in which a plurality of slits having a predetermined length are formed as absorbent bodies for absorbent articles.
- JP 2002-224162 A JP 2015-42244 A Japanese Utility Model Publication No. 63-18122 JP 2006-341061 A Japanese Utility Model Publication No. 1-87720
- the present invention relates to a long base portion having a horizontal direction, a vertical direction longer than the horizontal direction, and a thickness direction, and water absorption fixed to the surface of one surface of the long base portion.
- the present invention relates to a sheet-like article for absorbent articles comprising a plurality of absorptive units each having an absorptive polymer particle, wherein each absorptive unit is arranged so that its longitudinal direction is oriented in at least one direction.
- the present invention is fixed to a surface of a long base portion having a horizontal direction, a vertical direction longer than the horizontal direction, and a thickness direction, and one surface of the long base portion.
- the particles of the water-absorbing polymer swell beyond the side edge along the longitudinal direction of the elongated substrate portion, and the position of the elongated substrate portion causes the liquid in the thickness direction.
- the present invention relates to a method for manufacturing a sheet-like article for absorbent articles that is different from the position before absorption.
- the manufacturing method of the sheet-like material of the present invention includes a cutting step of cutting a strip-shaped base sheet to form a plurality of the elongated substrate portions, and one of the formed elongated substrate portions. A step of spraying water-absorbing polymer particles on the surface of the water-absorbing polymer.
- the present invention also includes an absorbent main body comprising a top sheet, a back sheet, and an absorbent body interposed between the two sheets, and the article longitudinal direction corresponding to the wearer's front-rear direction and orthogonal to the article longitudinal direction.
- the present invention relates to an absorbent article having a transverse direction.
- the absorber includes a long base portion having a horizontal direction, a vertical direction longer than the horizontal direction, and a thickness direction, and water absorption fixed to a surface of one surface of the long base portion.
- the said absorptive core comprises the center area
- each said absorptive unit is arranged so that the vertical direction may face the article horizontal direction.
- the surface sheet covers the skin-facing surface of the absorbent body and has an extended portion that extends outward from both side edges of the absorbent body in the lateral direction of the article. It is folded back to the non-skin facing surface side of the body to cover the non-skin facing surface of the absorbent body located in each side region of the absorbent core.
- the extension part of the top sheet is fixed to a constituent member of the absorbent article whose tip is located on the non-skin facing surface side of the extension part and adjacent to the extension part.
- FIG. 1 is a cross-sectional view schematically showing an embodiment of a sheet-like article for an absorbent article of the present invention, and shows a state before water-absorbing polymer particles absorb liquid.
- FIG. 2 is a cross-sectional view schematically showing a state where the water-absorbing polymer particles swell after absorbing the liquid in the sheet-like material shown in FIG.
- FIG. 3 is a perspective view of the sheet-like material shown in FIG. 1 viewed from the upper surface side.
- FIG. 4 is a schematic view showing an embodiment of the sheet-like product manufacturing apparatus shown in FIG.
- FIG. 5 is a schematic perspective view of the base sheet cut portion included in the manufacturing apparatus shown in FIG. 4.
- FIG. 6 is a cross-sectional view schematically showing another embodiment of the sheet-like material of the present invention, and shows a state before the water-absorbing polymer particles absorb the liquid (corresponding to FIG. 1).
- FIG. 7 is a cross-sectional view schematically showing another embodiment of the sheet-like material of the present invention, and shows a state before the water-absorbing polymer particles absorb the liquid (corresponding to FIG. 1).
- FIG. 8 is a schematic view showing an embodiment of the sheet-like product manufacturing apparatus shown in FIG.
- FIG. 9 is a cross-sectional view schematically showing another embodiment of the sheet-like material of the present invention, and shows a state before the water-absorbing polymer particles absorb the liquid (corresponding to FIG. 1).
- FIG. 9 is a cross-sectional view schematically showing another embodiment of the sheet-like material of the present invention, and shows a state before the water-absorbing polymer particles absorb the liquid (corresponding to FIG. 1).
- FIG. 10 is a cross-sectional view schematically showing another embodiment of the sheet-like material of the present invention, showing a state before the water-absorbing polymer particles absorb the liquid (corresponding to FIG. 1).
- FIG. 11 is a cross-sectional view schematically showing another embodiment of the sheet-like material of the present invention, and shows a state before the water-absorbing polymer particles absorb the liquid (corresponding to FIG. 1).
- 12 is a schematic view showing an embodiment of the sheet-like product manufacturing apparatus shown in FIG.
- FIG. 13 is a perspective view of still another embodiment of the sheet-like material of the present invention viewed from the upper surface side, and shows a state before the water-absorbing polymer particles absorb the liquid (corresponding to FIG. 3). .
- FIG. 14 is a cross-sectional view schematically showing another embodiment of the sheet-like material of the present invention, and shows a state before the water-absorbing polymer particles absorb the liquid (corresponding to FIG. 1).
- FIG. 15 is a perspective view of a pants-type disposable diaper that is an embodiment of the absorbent article of the present invention.
- FIG. 16 is a plan view showing a partially broken state in which the diaper shown in FIG.
- FIG. 17 is a perspective view showing the absorbent body of the diaper shown in FIG. 18 is a cross-sectional view schematically showing an embodiment of a sheet-like material that is the absorbent core of the absorbent body shown in FIG. 17, and shows a state before the water-absorbing polymer particles absorb the liquid.
- FIG. 19 is a cross-sectional view schematically showing a state in which the water-absorbing polymer particles absorb the liquid and swell in the sheet-like material shown in FIG. 20 is a cross-sectional view taken along line VI-VI shown in FIG. FIG.
- FIG. 21 is a cross-sectional view of the diaper shown in FIG. 20 in a worn state.
- FIG. 22 is a schematic view showing an embodiment of a sheet-like product manufacturing apparatus that is an absorbent core provided in the diaper shown in FIG.
- FIG. 23 is a schematic perspective view of an upstream base sheet cut portion included in the manufacturing apparatus shown in FIG. 22.
- FIG. 24 is a schematic perspective view of a base sheet cut portion on the downstream side of the manufacturing apparatus shown in FIG.
- an absorbent material containing a highly water-absorbing polymer is disposed in each channel space formed by being fixed by a fixing portion, so that the highly water-absorbing polymer absorbs body fluid. Even if it swells, it is difficult to move in the thickness direction, and the absorption performance of the superabsorbent polymer cannot be maximized.
- Patent Documents 2 and 3 do not describe anything about the positional relationship between the water-absorbing polymer particles and the slits when the water-absorbing polymer particles absorb the liquid.
- the absorbent core is separated into a central absorbent body and a pair of side absorbent bodies, and elastic members for raising the side absorbent bodies are arranged on both sides thereof.
- the side absorbent body is easy to stand up, and the fit of the crotch and the leak-proof performance are improved.
- the side absorber that stands up hits the skin of the wearer during wearing, giving a sense of incongruity.
- the inventor of the present invention has come to desire to further eliminate the uncomfortable feeling that the side absorber that has stood up in this way.
- Patent Documents 3 and 5 only disclose an absorbent body provided with slits, and do not describe anything about starting up the absorbent bodies on the side portions on both sides of the absorbent body.
- the sheet-like material of the present invention is used for absorbent articles.
- Absorbent articles are generally used for absorbing and holding excretory body fluids such as urine and menstrual blood.
- Absorbent articles include, for example, disposable diapers, sanitary napkins, incontinence pads, etc., but are not limited to these, and widely include articles used to absorb liquid discharged from the human body. It is.
- the absorbent article typically includes a liquid-retaining absorbent, a top sheet disposed on the skin facing surface side of the absorbent body, and a back sheet disposed on the non-skin facing surface side of the absorber. And have. And this absorber has the sheet-like material of this invention, and the liquid-permeable core wrap sheet which coat
- a so-called sublayer sheet may be disposed on at least one of the skin facing surface and the non-skin facing surface of the absorbent body.
- the sub-layer sheet is a liquid-permeable sheet disposed between the absorber and the top sheet or between the absorber and the back sheet.
- top sheet, back sheet, and core wrap sheet materials usually used in the technical field can be used without particular limitation.
- the surface sheet liquid permeable sheets such as various nonwoven fabrics and perforated films subjected to a hydrophilic treatment can be used.
- a liquid permeable or water repellent sheet such as a thermoplastic resin film or a laminate of the film and a nonwoven fabric can be used.
- the back sheet may have water vapor permeability.
- a thin paper (tissue paper) manufactured by a wet papermaking method, a liquid-permeable nonwoven fabric, or the like can be used.
- the said absorbent article may further comprise various members according to the specific use of this absorbent article.
- Such members are known to those skilled in the art.
- a pair or two or more pairs of leak-proof cuffs can be disposed on the left and right sides of the topsheet.
- FIG. 1 and 2 are sectional views schematically showing a sheet-like material 1 (hereinafter also simply referred to as “sheet-like material 1”) which is a preferred embodiment of the sheet-like material of the present invention.
- sheet-like material 1 shows a state before the water-absorbing polymer particles absorb the liquid (hereinafter, also simply referred to as “state before use”).
- the sheet-like material 1 shown in FIG. 2 shows a state in which the water-absorbing polymer particles have absorbed the liquid and swelled (hereinafter also simply referred to as “the state after swelling”).
- the state after swelling means the state of particles of the water-absorbing polymer after the sheet-like material 1 is immersed for 60 minutes in a physiological saline (0.9% by mass sodium chloride aqueous solution) adjusted to 25 ° C. means.
- FIG. 3 shows a perspective view of the sheet-like object 1 in a state before use.
- a sheet-like object 1 shown in FIG. 1 has a long direction having a horizontal direction (X direction), a vertical direction (Y direction) longer than the horizontal direction (X direction), and a thickness direction (Z direction).
- an absorbent unit 4 comprising a water-absorbing polymer particle 3 (hereinafter also simply referred to as “water-absorbing polymer 3”) fixed to the surface of one surface of the long base portion 2 and the long base portion 2.
- a plurality of the absorptive units 4 are arranged such that the longitudinal direction (Y direction) faces at least one direction.
- the horizontal direction (X direction), the vertical direction (Y direction), and the thickness direction (Z direction) of the elongated base portion 2 are the horizontal direction (X direction) and the vertical direction (Y direction) of the absorbent unit 4.
- the sheet material 1 also matches the horizontal direction (X direction), the vertical direction (Y direction), and the thickness direction (Z direction). (See FIG. 3).
- the longitudinal direction (Y direction) of the sheet-like object 1 corresponds with the wearer's front-back direction when the absorbent article provided with the sheet-like object 1 is worn.
- the first layer 1 is formed by arranging a plurality of absorbent units 4 such that the longitudinal direction (Y direction) of the absorbent unit 4 faces the longitudinal direction (Y direction) of the sheet 1. (See FIG. 3). From the viewpoint of ease of movement of the absorbent unit 4 between the absorbent units 4 and 4 adjacent to each other in the lateral direction (X direction) of the long base portion 2 (absorbent unit 4), inclusions are not present. It exists. That is, the absorptive unit 4 is not wrapped with inclusions.
- substrate part 2 is a skin opposing surface which opposes a wearer's skin
- substrate part 2 is a back surface It is a non-skin facing surface that faces the sheet. That is, the surface opposite to one surface is the other surface.
- the absorbent unit 4 of the sheet-like material 1 is formed in a strip shape that is long in the longitudinal direction Y in a state before use.
- the absorptive unit 4 may have water-absorbing polymer particles 3b (see FIG. 1) existing across the side edge 2s of the elongated base 2 as described later.
- the length Lx in the lateral direction X is formed slightly longer than the width (W2) of the long base portion 2 described later.
- the length Lx in the transverse direction X of the absorbent unit 4 is preferably about 0.5 mm to 10 mm, more preferably about 1 mm to 5 mm.
- the length Ly in the longitudinal direction Y of the absorbent unit 4 is preferably about 20 to 200 times, more preferably about 40 to 80 times the length Lx in the lateral direction X.
- the length Ly in the longitudinal direction Y of the absorbent unit 4 is preferably about 10 mm to 500 mm, more preferably about 200 mm to 400 mm.
- the absorptive unit 4 has a very elongated shape.
- the magnitude relationship of the length Lx in the lateral direction (X direction) of the absorbent unit 4 with respect to the width W2 of the long base portion 2 is preferably 0 ⁇ m ⁇ (Lx ⁇ W2) ⁇ 1400 ⁇ m. More preferably, 200 ⁇ m ⁇ (Lx ⁇ W2) ⁇ 1000 ⁇ m.
- the sheet-like object 1 is formed in a rectangular shape that is long in the vertical direction (Y direction) in a state before use.
- the sheet-like material 1 has a length in the vertical direction (Y direction) of about 100 mm to 1000 mm, and a length in the horizontal direction (X direction) of about 50 mm to 300 mm.
- the sheet-like object 1 has an absorption region AT in which a plurality of absorbent units 4 are arranged so as to face at least one direction before use.
- the ratio of the absorption region AT to the entire sheet-like material 1 is 20% from the viewpoint of easily absorbing the liquid in the region where the water-absorbing polymer particles 3 are fixed, in a plan view of the sheet-like material 1 before use.
- it is 50% or more, more preferably 100% or less, still more preferably 90% or less, specifically 20% or more and 100% or less. It is preferable that it is 50% or more and 90% or less.
- the ratio of the absorption area AT is 100%, for example, a plurality of sheet-like materials such that the longitudinal direction (Y direction) of the absorbent unit 4 faces the longitudinal direction (Y direction) of the sheet-like material 1.
- 1 in the case of juxtaposing in the lateral direction (X direction) means a form that is arranged in the entire region between both ends in the longitudinal direction (Y direction) of the sheet-like object 1 or of the absorbent unit 4
- the longitudinal direction ( It means a form that is arranged over the entire region between both side portions along the (Y direction). Note that, when the sheet-like object 1 is viewed in plan, a region other than the absorption region AT becomes a non-slit region NT described later.
- the absorbent unit 4 When arranging the absorbent unit 4 so that the longitudinal direction (Y direction) of the absorbent unit 4 faces the longitudinal direction (Y direction) of the sheet-like article 1, three or more absorbent units 4 are arranged per sheet-like article.
- 50 or more are arranged, more preferably 1000 or less, more preferably 500 or less, more specifically, 3 or more. 1000 or less are preferably arranged, and more preferably 50 to 500 are arranged.
- the absorbent unit 4 is arranged so that the longitudinal direction (Y direction) of the absorbent unit 4 faces the lateral direction (X direction) of the sheet-like object 1, three or more absorbent units 4 are arranged per sheet-like object.
- the counting method of the absorptive units 4 is defined as the number when the number of the absorptive units that intersect the straight line is maximized when a straight line in the lateral direction X is drawn.
- the sheet-like object 1 before use is such that the longitudinal direction (Y direction) of the absorbent unit 4 is directed to the longitudinal direction (Y direction) of the sheet-like article 1 from the viewpoint of ease of conveyance during manufacture. It is preferable that a plurality of the absorbent units 4 are arranged, and each of the absorbent units 4 is parallel to the longitudinal direction (Y direction) so that the plurality of absorbent units 4 do not cross each other. More preferably, it is arranged in the Y direction).
- a plurality of absorbent units 4 each having a long base portion 2 having a uniform width are used, and the longitudinal direction (Y direction) of the absorbent unit 4 is the longitudinal direction of the sheet-like material 1. It is formed so as to be parallel to the longitudinal direction (Y direction) of the sheet-like object 1 so as to face the direction (Y direction).
- the sheet-like object 1 is a non-slit region in which a plurality of long base portions 2 are connected in the horizontal direction (X direction) on both ends in the vertical direction (Y direction) or on both sides along the vertical direction (Y direction).
- NT is preferably provided, and the sheet-like object 1 of the present embodiment includes non-slit regions NT at both ends in the vertical direction (Y direction) as shown in FIG. That is, in the sheet-like material 1 of the present embodiment, a single base sheet is provided, and non-slit regions NT are provided at both ends in the longitudinal direction (Y direction) of the base sheet, and the non-slit A long base portion formed by a cutting process described later is provided between the regions NT.
- the sheet shape of the sheet-like object 1 is easily maintained in a state before use, and the structure is less likely to be disturbed. It is preferable that the water-absorbing polymer particles 3 are not arranged in the non-slit region NT. Thus, if the water-absorbing polymer particles 3 are not arranged in the non-slit region NT, even if the liquid is absorbed, the water-absorbing polymer particles 3 hardly swell in the non-slit region NT. However, the sheet shape of the sheet-like material 1 is easily maintained, the structure is hardly disturbed, the liquid is easily absorbed in the region where the water-absorbing polymer particles 3 are disposed, and the sheet-like material 1 as a whole is easily balanced.
- the ratio (W2 / W1) of the width (W2) (the length in the lateral direction (X direction)) of the long base portion 2 to the width (W1) of the sheet-like material 1 is From the standpoint of the amount of water-absorbing polymer supported, swelling inhibition, flexibility, air permeability, maintenance of sheet shape, etc., it is preferably 0.001 or more, more preferably 0.002 or more, and 0 .2 or less, more preferably 0.04 or less, specifically preferably 0.001 or more and 0.2 or less, and 0.002 or more and 0.04 or less. Is more preferable.
- the width (W2) of the elongated base portion 2 is preferably 0.3 mm or more, more preferably 0.6 mm or more, and 10 mm or less from the same viewpoint. Is preferably 2 mm or less, more preferably 1.8 mm or less, specifically preferably 0.3 mm or more and 10 mm or less, and more preferably 0.6 mm or more and 2 mm or less. More preferably, it is 0.6 mm or more and 1.8 mm or less.
- the elongated base portion 2 (base material sheet) constituting the absorbent unit 4 is preferably a hydrophilic sheet from the viewpoint of improving the utilization efficiency of the water-absorbing polymer 3 because the liquid easily diffuses in the absorption region AT.
- the hydrophilic sheet include paper, non-woven fabric, cloth, synthetic sponge formed by foaming synthetic resin, etc. Among them, even if it is thin, the tensile strength is relatively high, and it is thin and can be given flexibility. Therefore, a nonwoven fabric is preferably used.
- non-woven fabric a hydrophilic non-woven fabric containing hydrophilic fibers as constituent fibers, a hydrophilic non-woven fabric containing synthetic fibers imparted with hydrophilicity as constituent fibers, and the like are preferably used.
- the basis weight of the nonwoven fabric is preferably 5 g / m 2 or more and 100 g / m 2 or less, more preferably 10 g / m 2 or more and 40 g / m 2 or less.
- polyacrylic acid Soda (acrylic acid-vinyl alcohol) copolymer, crosslinked polyacrylic acid soda, (starch-acrylic acid) graft polymer, (isobutylene-maleic anhydride) copolymer and saponified product thereof, potassium polyacrylate,
- cesium polyacrylate and the like can be mentioned, and one of these can be used alone or two or more of them can be used in combination.
- water-absorbing polymer particles 3 there are an irregular type, a block type, a bowl type, a spherical particle aggregation type, a spherical type, etc., due to the difference in shape.
- a spherical type is used.
- a method of fixing the water-absorbing polymer particles 3 to the long base portion 2 a method using an adhesive, a method of chemically fixing using hydrogen bonding or the like, or the long base portion 2 is a non-woven fabric.
- a method of raising the constituent fibers and fixing them between the raised constituent fibers can be mentioned.
- an adhesive 5 is used in the sheet 1 shown in FIGS. 1 and 2. ing. That is, the water-absorbing polymer particles 3 of the sheet-like material 1 are fixed to the surface of the elongated base portion 2 via the adhesive 5. In this way, when the water-absorbing polymer particles 3 are fixed to the surface of the long base portion 2 via the adhesive 5, the water-absorbing polymer is in a state before use or after swelling of the sheet-like material 1. The particles 3 are difficult to drop off.
- a hot-melt adhesive is preferably used.
- the hot melt adhesive include styrene and olefin.
- Styrene-based hot melt adhesives include styrene-butadiene-styrene copolymer (SBS), styrene-isoprene-styrene copolymer (SIS), and styrene-ethylene-butylene-styrene copolymer that is a hydrogenated product of SBS. (SEBS) and blended hot-melt adhesives obtained by blending two or more of these can be used.
- a blended hot-melt adhesive of SIS and SBS or a blended hot-melt adhesive of SIS and SEBS is preferably used.
- the application amount of the hot melt adhesive is preferably 0.5 g / m 2 or more and 100 g / m 2 or less, more preferably 5 g / m 2 or more and 50 g / m 2 or less.
- the sheet-like material 1 shown in FIG. 1 is in the state before use, that is, before the water-absorbing polymer particles 3 absorb the liquid, the long base portion of the absorbent unit 4 adjacent in the lateral direction (X direction). 2 and 2 are at least partially adjacent from the viewpoint that the sheet shape of the sheet-like material 1 before use is easily maintained, the structure is less likely to be disturbed, and the water-absorbing polymer particles 3 can be arranged at appropriate positions. It is preferable that the long base portions 2 and 2 adjacent in the horizontal direction (X direction) are adjacent to each other over the whole. In addition, in the sheet-like object 1 shown in FIG. 1, the elongate base
- “adjacent” means that adjacent long base portions 2 and 2 are adjacent to each other and continue.
- the water-absorbing polymer particles 3 swell beyond the side edge 2 s along the longitudinal direction (Y direction) of the long base 2 in the state after swelling as shown in FIG. It is made like that.
- the swelling of the water-absorbing polymer particles 3 beyond the side edge portion 2s of the elongated base portion 2 means, in other words, the swollen water absorption shown in FIG. It means that the swollen water-absorbing polymer particles 3 exist across the side edge portion 2s of the elongated base portion 2 like the conductive polymer particles 3a.
- the water-absorbing polymer particles 3 may be present on the inner side of the side edge portion 2s of the elongated base portion 2, or, for example, before use (before swelling) shown in FIG. Like the water-absorbing polymer particles 3 b, the water-absorbing polymer particles 3 may be present across the side edge 2 s of the long base portion 2 from the beginning.
- the sheet-like material 1 is configured such that, in the state after swelling as shown in FIG. 2, the position of the elongated base portion 2 is different from the position before absorbing the liquid in the thickness direction (Z direction). ing.
- the position of the elongated base portion 2 is different from the position before absorbing the liquid in the thickness direction (Z direction).
- the position of the long base portion 2 in the state after swelling of the polymer particles 3 and the position of the long base portion 2 in the state before use (before swelling) of the water absorbent polymer particles 3 shown in FIG. It means that they are formed differently in the vertical direction. Specifically, there are cases where they are shifted vertically, when they are shifted diagonally, or when both are occurring.
- the water-absorbing polymer particles 3 swell beyond the side edge 2s of the long base portion 2 in the state after swelling as shown in FIG. (Refer to the water-absorbing polymer 3a shown in FIG. 2), and the position of the elongated base 2 is different from the position before absorbing the liquid in the thickness direction (Z direction). Therefore, when the sheet-like material 1 is used for an absorbent article, as shown in FIG.
- the adjacent absorbent unit 4, 4 when the water-absorbing polymer particles 3 absorb and swell the body fluid, the adjacent absorbent unit 4, 4, even if the water-absorbing polymer particles 3, 3 swollen beyond the side edge 2 s of the long base portion 2 come into contact with each other, the adjacent absorbent units 4, 4 are in the thickness direction (Z direction). ), The collision between the swollen water-absorbing polymer particles 3 and 3 is alleviated, the pressure applied to the swollen water-absorbing polymer particles 3 can be reduced, and the absorption of the body fluid of the water-absorbing polymer particles 3 can be reduced. Hard to block.
- the sheet-like material 1 of the present embodiment when the water-absorbing polymer particles 3 are swollen by absorbing the body fluid, the water-absorbing polymer particles 3 are unlikely to inhibit swelling, and the water-absorbing polymer particles 3
- the absorption performance can be maximized, so the absorption performance is easy to improve.
- the absorbent unit 4 since the inclusion 1 is not present between the adjacent absorbent units 4 and 4 in the sheet-like material 1 of the present embodiment, the absorbent unit 4 is easy to move, and the above effects can be more easily achieved. It has become.
- the position of the elongated base portion 2 constituting the adjacent absorbent unit 4 is shifted up and down in the thickness direction (Z direction). It is made different, such as slanting. Therefore, the adjacent absorbent units 4 and 4 are easy to move freely in the thickness direction (Z direction), the collision between the swollen water-absorbing polymer particles 3 and 3 is easy to relax, and the swollen water-absorbing polymer particles 3 can be reduced, and it is difficult to inhibit the absorption of the body fluid of the water-absorbing polymer particles 3.
- the water-absorbing polymer particles 3 in a swollen state are swollen beyond the side edge 2 s of the long base portion 2, so that the adjacent absorbent units 4, 4 are in the thickness direction (Z From the viewpoint of making the water-absorbing polymer particles 3 more difficult to inhibit the swelling of the water-absorbing polymer particles 3 in the state before use as shown in FIG. It is preferable that it is arranged in the vicinity of the side edge 2s along the vertical direction (Y direction), and that the water-absorbing polymer particles 3 protrude beyond the side edge 2s of the elongated base 2. More preferable (see the water-absorbing polymer particles 3b shown in FIG. 1).
- the water-absorbing polymer particles 3 in a swollen state are swollen beyond the side edge 2 s of the long base portion 2, so that the adjacent absorbent units 4, 4 are in the thickness direction.
- the distance between the side edges 2s and 2s along the longitudinal direction (Y direction) of the elongated base portion 2 from the viewpoint of freely moving in the (Z direction) and making it more difficult to inhibit swelling of the water-absorbing polymer particles 3 is preferably larger than the average particle diameter of the water-absorbing polymer particles 3 before use (before swelling) and smaller than the average particle diameter of the water-absorbing polymer particles 3 after swelling.
- the distance between the side edges 2s, 2s of the long base portion 2 has the same meaning as the width (W2) of the long base portion 2 described above.
- the average particle diameter of the water-absorbing polymer particles 3 before use (before swelling) is preferably 20 ⁇ m or more, more preferably 200 ⁇ m or more, and preferably 700 ⁇ m or less, 500 ⁇ m or less. More specifically, it is preferably 20 ⁇ m or more and 700 ⁇ m or less, and more preferably 200 ⁇ m or more and 500 ⁇ m or less.
- the average particle size of the water-absorbing polymer particles 3 in the swollen state is preferably 200 ⁇ m or more, more preferably 800 ⁇ m or more, and preferably 3000 ⁇ m or less, and 2000 ⁇ m or less. More preferably, it is preferably 200 ⁇ m or more and 3000 ⁇ m or less, and more preferably 800 ⁇ m or more and 2000 ⁇ m or less.
- the average particle diameter of the water-absorbing polymer particles 3 is determined by the following measuring method.
- the average particle diameter in the state before use can measure the diameter or long axis of the water-absorbing polymer particles by optical microscope observation using the water-absorbing polymer particles before use.
- the diameter here refers to the case where the water-absorbing polymer particles are spherical.
- the long axis refers to a case in which the water-absorbing polymer particles have an irregular shape such as a rhombus, rectangle, tuft, or football.
- the diameter or major axis of a total of 50 water-absorbing polymer particles is measured, and the number average particle diameter is defined as the average particle diameter of the water-absorbing polymer particles in a state before use.
- the average particle diameter in the state after swelling is such that the sheet 1 is immersed in a physiological saline (0.9% by mass sodium chloride aqueous solution) adjusted to 25 ° C., and the sheet 1 is 1 hour after the start of immersion. After taking out from the physiological saline, hanging in a vertical state for 30 minutes and draining, the diameter or major axis of the water-absorbing polymer particles on the surface of the elongated substrate portion 2 can be measured by observation with an optical microscope.
- the diameter here refers to the case where the water-absorbing polymer particles are spherical.
- the long axis refers to a case in which the water-absorbing polymer particles have an irregular shape such as a rhombus, rectangle, tuft, or football.
- the diameter or major axis of a total of 50 water-absorbing polymer particles is measured, and the number average particle diameter is defined as the average particle diameter of the water-absorbing polymer particles in the swollen state.
- FIG. 4 shows a manufacturing apparatus 100 that is preferably used in the manufacturing method of this embodiment.
- the manufacturing apparatus 100 of the present embodiment includes a base sheet cut part 110, an adhesive application part 120, and a water-absorbing polymer spray part 130 in this order from the upstream side to the downstream side of the manufacturing process.
- an apparatus in which the adhesive application unit 120 and the water absorbent polymer spraying unit 130 are integrated is used.
- the adhesive application unit 120 and the water absorbent polymer spraying unit 130 are integrated. It does not have to be.
- the integrated device has a configuration in which an adhesive application unit 120 is disposed on the upstream side of the device, and a water-absorbing polymer spraying unit 130 is disposed on the downstream side of the integrated device.
- the base material sheet cutting part 110 is a part that cuts the belt-like base material sheet 20 to form a plurality of long base parts 2.
- Various known cutting devices can be used for cutting the base sheet 20 without any particular limitation.
- a plurality of cutter blades 111a, 111a, 111a in the manufacturing device 100, as shown in FIG. 5, a plurality of cutter blades 111a, 111a, 111a, in the manufacturing device 100, as shown in FIG. 5, a plurality of cutter blades 111a, 111a, 111a,.
- a cutting device 113 including a rotary die 111b in which a... Is disposed and a receiving roll 112 having a flat peripheral surface disposed opposite to the rotary die 111b is used.
- the cutter blades 111a of the cutting device 113 are arranged in the rotation direction of the rotary die 111b, and the plurality of cutter blades 111a, 111a, 111a,.
- the interval between the cutter blades 111a, 111a adjacent to each other in the orthogonal direction (X1 direction) corresponds to the width (length in the horizontal direction (X direction)) of each long base portion 2 to be formed.
- the conveyance direction (Y1 direction) of the base sheet 20 corresponds to the longitudinal direction (Y direction) of the sheet-like material 1 to be manufactured
- the orthogonal direction (X1 direction) is the sheet shape to be manufactured. This corresponds to the horizontal direction (X direction) of the object 1.
- the base sheet 20 may be cut using a shear-cut type cutting device that rubs and cuts the side surfaces of the upper blade and the lower blade, and a plurality of score cut knives are orthogonally crossed (X1 direction).
- a juxtaposed apparatus may be used, or a laser apparatus that melts by irradiation with laser light may be used.
- the sheet-like object 1 includes the non-slit regions NT at both ends in the longitudinal direction (Y direction) like the sheet-like object 1 shown in FIG. 3, for example, as shown in FIG.
- the recess 114 may be formed on the peripheral surface of the cutter blade 111a.
- the length of the arc of the concave portion 114 at the outer periphery of the rotating cutter blade 111a is the sum of the lengths in the vertical direction (Y direction) of the non-slit regions NT arranged at both ends of the sheet-like object 1 shown in FIG. Try to accommodate equal lengths. If a plurality of cutter blades 111a, 111a, 111a...
- a rotary die 111b is used in which the positions of the recesses 114, 114 of the cutter blades 111a adjacent to each other in the X1 direction are aligned.
- the length of the arc of the portion excluding the recess 114 on the outer periphery of the rotating cutter blade 111a corresponds to the length in the longitudinal direction (Y direction) of the long base portion 2 of the sheet-like object 1 shown in FIG. is doing.
- the adhesive application part 120 located on the downstream side of the base sheet cut part 110 is a part that applies the adhesive 5 to the surface of one surface (upper surface) of the long base part 2.
- an application head 121 is provided.
- the coating head 121 is formed to have a length corresponding to the width (the length in the horizontal direction (X direction)) of the absorption region AT of the sheet-like object 1 in the X1 direction.
- the coating head 121 formed in this way is arranged on one surface (upper surface) of the long base portion 2.
- the water-absorbing polymer spraying unit 130 located on the downstream side of the adhesive application unit 120 sprays the water-absorbing polymer particles 3 on the surface of one surface (upper surface) of the elongated base body 2 to dispose the absorbent unit 4.
- the manufacturing apparatus 100 includes a water-absorbing polymer introduction part 131.
- various known introduction devices can be used without particular limitation.
- the water-absorbing polymer introduction part 131 is formed to have a length corresponding to the width (the length in the horizontal direction (X direction)) of the absorption region AT of the sheet-like material 1 in the X1 direction.
- the water-absorbing polymer introduction part 131 formed in this way is arranged on one surface (upper surface) of the elongated base part 2.
- a vacuum conveyor 141 is disposed on the lower surface side.
- the vacuum conveyor 141 includes an endless breathable belt 144 laid across a drive roll 142 and a plurality of driven rolls 143, and a vacuum box disposed at a position facing the integrated device with the breathable belt 144 interposed therebetween. 145.
- On the vacuum conveyor 141 a plurality of long base parts 2 formed by cutting the base material sheet 20 at the base material sheet cutting part 110 are introduced.
- the drive roll 151 which pays out the base material sheet 20 from the raw fabric roll of the strip
- the manufacturing method of the sheet-like object 1 according to the present embodiment includes a cutting step of cutting a strip-shaped base sheet 20 to form a plurality of long base portions 2, and a plurality of the long bases formed.
- coats the adhesive agent 5 is provided in the process before the particle
- the vacuum box 145 Prior to carrying out the cutting step, first, the vacuum box 145 is made negative by operating the exhaust device connected thereto.
- the drive roll 151 and the drive roll 152 are driven, the cutting device 113 and the breathable belt 144 are rotated, and the vacuum conveyor 141 is operated.
- the base sheet 20 is fed out from the raw roll of the strip-shaped base sheet 20 by the driving roll 151 and supplied between the plurality of cutter blades 111a and the receiving roll 112 in the cutting device 113 of the base sheet cut section 110.
- the strip-shaped base sheet 20 is cut to form a plurality of long base portions 2 (cutting step).
- the plurality of cutter blades 111 a arranged in the rotation direction of the rotary die 111 b are respectively orthogonal to the conveyance direction (Y1 direction) of the belt-shaped base sheet 20 ( X1 direction) are arranged side by side, so the strip-shaped base sheet 20 is cut along the transport direction (Y1 direction) of the base sheet 20 and cut at a plurality of locations in the orthogonal direction (X1 direction).
- a plurality of long base portions 2 are formed.
- the portion cut by the cutter blade 111 a becomes the side edge portion 2 s of the long base portion 2.
- the some cutter blade 111a since the some cutter blade 111a has the recessed part 114, respectively, the longitudinal direction (Y direction) of the elongate base
- the plurality of long base portions 2 formed in the cutting step are formed in parallel to the transport direction (Y1 direction) and are arranged in parallel in the orthogonal direction (X1 direction).
- the adhesive 5 is applied to the surface of one surface of the long base portion 2 formed in the cutting process (adhesive application process).
- the coating head 121 of the adhesive coating unit 120 is used.
- the adhesive 5 is intermittently formed on the surface of one surface (upper surface) of the plurality of long base portions 2 formed side by side in the orthogonal direction (X1 direction) except for the non-cut portion NTb. Apply.
- particles 3 of the water-absorbing polymer are dispersed on the adhesive 5 applied to the surface of one surface (upper surface) of the plurality of long base portions 2 in the adhesive application step (the water-absorbing polymer particles). Particle dispersion process).
- the elongate base portion 2 having the adhesive 5 applied to the surface of one surface (upper surface) formed in the adhesive application step is conveyed by the vacuum conveyor 141, Is located on the surface of one surface (upper surface) of the plurality of long base portions 2 juxtaposed in the orthogonal direction (X1 direction) by the water absorbent polymer introduction portion 131 of the water absorbent polymer spraying portion 130.
- particles 3 of the water-absorbing polymer are dispersed except for the non-cut portion NTb.
- the water-absorbing polymer particles 3 are fixed to the surface of one surface (upper surface) of the long base portion 2 via the adhesive 5.
- a plurality of 4 are formed.
- the plurality of absorbent units 4 formed in this way are arranged so that the respective longitudinal directions (Y direction) face the transport direction (Y1 direction), and form the precursor 1b of the sheet-like material 1 To come.
- the precursor 1b of the sheet-like material 1 is conveyed downstream by the drive roll 152, and the length of the non-cut portion NTb in the conveying direction (Y1 direction) is secondarily determined using a known cutting device (not shown). It cut
- the sheet-like object 1 can be manufactured stably and efficiently.
- the manufacturing method of this embodiment after forming the elongate base part 2 of a uniform width using the plurality of cutter blades 111a, 111a, 111a, 111a, . Since the adhesive 5 is applied to the surface of one surface (upper surface), in the sheet-like material 1 to be manufactured, the elongated base portions 2 and 2 of the absorbent unit adjacent in the lateral direction (X direction). It is easy to have a form in which the two are adjacent to each other. Such a sheet-like material 1 can be manufactured stably and efficiently.
- the sheet-like material 1 shown in FIG. 6 is in a state before use, and water-absorbing polymer particles 3 are fixed to the surface of one surface (upper surface) of the long base portion 2 via an adhesive 5.
- the adhesive 5 is further disposed on the water-absorbing polymer particles 3.
- the sheet-like material 1 shown in FIG. 6 is provided with another adhesive application unit 120 on the downstream side of the water-absorbing polymer spraying unit 130, It can manufacture by apply
- the sheet-like material 1 shown in FIG. 7 is in a state before use, and water-absorbing polymer particles 3 are fixed to the surface of one surface (upper surface) of the long base portion 2 via an adhesive 5. Further, the adhesive 5 is further disposed on the water-absorbing polymer particles 3, and the second elongated base portion 2 is further disposed on the adhesive 5. That is, in the sheet-like material 1 shown in FIG. 7, the water-absorbing polymer particles 3 are sandwiched between the long base portions 2 in which the adhesive 5 is disposed on one surface, and the water-absorbing polymer particles 3 are fixed. It is a form.
- the sheet-like object 1 shown in FIG. 7 is formed by, for example, using the manufacturing apparatus 100 shown in FIG. 4 to cut the strip-shaped base sheet 20 to form a plurality of long base portions 2 and then forming the plurality of pieces.
- the adhesive 5 is applied to the surface of one surface (upper surface) of the entire long base portion 2, for example, a plurality of pieces located, for example, on the right side of the bisecting position in the orthogonal direction (X1 direction)
- the water-absorbing polymer particles 3 are sprayed only on the adhesive 5 applied to the surface of one surface (upper surface) of the long base portion 2.
- a plurality of long base portions 2 each having an adhesive 5 applied on the surface of one surface (upper surface), which is located on the left side of the bisecting position in the orthogonal direction (X1 direction), are publicly known. It is possible to manufacture by folding back on the water-absorbing polymer particles 3 located on the right side.
- the sheet-like object 1 shown in FIG. 7 can also be manufactured using the manufacturing apparatus 100B shown in FIG. 8, for example.
- the manufacturing apparatus 100B includes a first slit device 113A that cuts the strip-shaped base sheet 20 that forms the plurality of long base portions 2 on the lower surface side of the sheet-like object 1 shown in FIG. 7, and the first slit device 113A.
- a second slit device 113B that cuts another belt-shaped second base material sheet 6 that forms the plurality of long base portions 2 on the upper surface side of the sheet-like object 1 shown in FIG. 7 is provided.
- Each of the first slit device 113A and the second slit device 113B includes a rotary die 111b and a receiving roll 112.
- the manufacturing apparatus 100B includes not only the first adhesive application unit 120A on the upstream side of the water absorbent polymer spraying unit 130 but also the second adhesive application unit 120B on the downstream side of the water absorbent polymer spraying unit 130.
- one strip-like base material sheet 20 is cut by the first slitting device 113A, and a plurality of long sheets are formed.
- the adhesive 5 is applied to the surface of one surface (upper surface) of all the plurality of long base parts 2 formed by the first adhesive application part 120A.
- the water-absorbing polymer particles 3 are dispersed on the adhesive 5 applied to the surface of one surface (upper surface) of the plurality of long base portions 2, and one surface of the dispersed water-absorbing polymer particles 3 is applied.
- the adhesive 5 is further applied to the surface of the (upper surface) by the second adhesive application unit 120B.
- the other strip-shaped second base sheet 6 is cut by the second slit device 113B to form a plurality of second long base portions 2. Then, it is formed by being cut by the second slit device 113B on the adhesive 5 applied to the water-absorbing polymer particles 3 spread on the surface of one surface (upper surface) of the plurality of long base portions 2. Further, the sheet-like object 1 shown in FIG. 7 can be manufactured by arranging a plurality of second long base portions 2.
- the sheet-like material 1 shown in FIG. 9 is in a state before use, and water-absorbing polymer particles 3 are fixed to the surface of one surface (upper surface) of the long base portion 2 via an adhesive 5. Further, the adhesive 5 is disposed on the water-absorbing polymer particles 3, and the long base portion 2 is further disposed on the adhesive 5, and the form of the sheet 1 shown in FIG. It is similar. That is, the sheet-like material 1 shown in FIG. 9 wraps the water-absorbing polymer particles 3 with a plurality of long base portions 2 each having an adhesive 5 disposed on the surface of one surface, and the water-absorbing polymer particles 3. Is a fixed form.
- the sheet-like object 1 shown in FIG. 9 is formed by, for example, using the manufacturing apparatus 100 shown in FIG. 4 to cut the belt-shaped base sheet 20 to form a plurality of long base portions 2 and then forming the plurality of pieces. After applying the adhesive 5 to the surface of one surface (upper surface) of the entire long base portion 2, for example, from a position that is spaced from the bisected position in the orthogonal direction (X1 direction) to the right.
- the water-absorbing polymer particles 3 are dispersed only on the adhesive 5 applied to the surface of one surface (upper surface) of the plurality of long base portions 2 located on the right side.
- the plurality of long base portions 2 in which the water-absorbing polymer particles 3 are not sprayed and the adhesive 5 is applied on the surface of one surface (upper surface) are formed using a known folded plate. Further, it can be manufactured by folding back on a plurality of long base portions 2 to which water-absorbing polymer particles 3 are fixed, and further folding back so as to enclose the water-absorbing polymer particles 3.
- the sheet-like material 1 shown in FIG. 10 is in a state before use, and the water-absorbing polymer particles 3 are fixed to the surface of one surface (upper surface) of the long base portion 2 via an adhesive 5.
- the elongated base portion 2 is further arranged on the water-absorbing polymer particles 3.
- the sheet-like object 1 shown in FIG. 10 is orthogonally crossed after, for example, using the manufacturing apparatus 100 shown in FIG.
- the adhesive 5 is applied only to the surface of one surface (upper surface) of the plurality of long base portions 2 located on the right side of the bisected position in the direction (X1 direction).
- the particles 3 of the water-absorbing polymer are sprayed only on the top.
- a plurality of long base portions 2 on which the adhesive 5 is not applied to the surface of one surface (upper surface) located on the left side of the bisecting position in the orthogonal direction (X1 direction) It can manufacture by folding up on the water-absorbing polymer particles 3 located on the right side using a known folded plate.
- the sheet-like material 1 shown in FIG. 11 is in a state before use, and water-absorbing polymer particles 3 are fixed to the surface of one surface (upper surface) of the long base portion 2 via an adhesive 5. Further, an adhesive 5 is disposed on the water-absorbing polymer particles 3, and a base sheet (in which the elongated base portion 2 is formed wider than the elongated base portion 2 on the adhesive 5). The second base sheet 6 is different from the first base sheet). That is, a sheet-like object 1 shown in FIG. 11 includes a long base portion 2 in which an adhesive 5 is disposed on one surface and a second base sheet 6 in which the adhesive 5 is disposed on one surface. Thus, the water-absorbing polymer particles 3 are sandwiched and the water-absorbing polymer particles 3 are fixed.
- the manufacturing apparatus 100 ⁇ / b> C includes not only the first adhesive application unit 120 ⁇ / b> A on the upstream side of the water absorbent polymer spray unit 130, but also the second adhesive application unit 120 ⁇ / b> B on the downstream side of the water absorbent polymer spray unit 130.
- the conveyance apparatus 140 which conveys the 2nd base material sheet 6 of the upper surface side of the sheet-like object 1 shown in FIG. 11 is provided.
- one strip-shaped first base material sheet 20 is cut by the first slitting device 113A to obtain a plurality of sheets.
- the adhesive 5 is applied to the surface of one surface (upper surface) of all the plurality of long base portions 2 formed by the first adhesive application portion 120A.
- the water-absorbing polymer particles 3 are dispersed on the adhesive 5 applied to the surface of one surface (upper surface) of the plurality of long base portions 2, and one surface of the dispersed water-absorbing polymer particles 3 is applied.
- the adhesive 5 is further applied to the surface of the (upper surface) by the second adhesive application unit 120B.
- the belt-like second material conveyed by the conveying device 140 By arranging the base sheet 6, the sheet 1 shown in FIG. 11 can be manufactured.
- the present invention is not limited to the above embodiment and the above embodiment, and can be modified as appropriate.
- the water-absorbing polymer particles 3 are formed on the surface of one surface (upper surface) of each long base portion 2.
- the surface of one surface (upper surface) of each long base portion 2 but also on the surface of the other surface (lower surface) from the viewpoint of improving the liquid absorption performance of the sheet-like material 1. May also be fixed.
- one surface of each long base portion 2 is used by using the manufacturing apparatus 100 shown in FIG.
- the water-absorbing polymer particles 3 After fixing the water-absorbing polymer particles 3 on the (upper surface) surface, the water-absorbing polymer particles 3 are reversed through a reversing roll, and then the other surface of each elongated substrate portion 2 using another water-absorbing polymer spraying portion 130. It can be produced by dispersing and fixing the water-absorbing polymer particles 3 on the surface of the (lower surface).
- the basis weight of the water-absorbing polymer 3 fixed to is larger than the basis weight of the water-absorbing polymer 3 fixed to the surface of one surface (upper surface) of the elongated base portion 2.
- the basis weight of the water-absorbing polymer 3 to be fixed to the surface of one surface (upper surface) of the long base portion 2 is preferably 10 g / m 2 or more and 250 g / m 2 or less, and 30 g / m 2 or more and 150 g / m 2.
- the basis weight of the water-absorbing polymer 3 to be fixed to the surface of the other surface (lower surface) of the elongated base portion 2 is preferably 30 g / m 2 or more and 400 g / m 2 or less, and 50 g / m 2 or more and 300 g / m 2. More preferably, it is m 2 or less.
- the water-absorbing polymer 3 when the water-absorbing polymer 3 is fixed to both surfaces (upper and lower surfaces) of each long base portion 2, a large amount of liquid is held on the non-skin facing surface (lower surface) far from the skin of the wearer to face the skin. From the viewpoint of improving the touch without leaving a liquid on the surface (upper surface), the water-absorbing polymer 3 fixed to the surface of one surface (upper surface) of the long base portion 2 is the long base portion 2. Compared to the water-absorbing polymer 3 fixed to the surface of the other surface (lower surface), it is preferable that the liquid passing performance under pressure is high and the centrifugal retention amount is low.
- the liquid passing rate under pressure at 2.0 kPa is preferably 20 ml / min or more.
- 40 ml / min or more more preferably 1000 ml / min or less, further preferably 800 ml / min or less, specifically 20 ml / min or more and 1000 ml / min or less. It is preferably 40 ml / min or more and 800 ml / min or less.
- the liquid flow rate under pressure at 2.0 kPa is preferably 0 ml / min or more, preferably 10 ml. / Min or more, more preferably 400 ml / min or less, further preferably 200 ml / min or less, and specifically 0 ml / min or more and 400 ml / min or less. It is preferably 10 ml / min or more and 200 ml / min or less.
- the liquid passing speed under pressure is determined by the following measuring method.
- ⁇ Measurement method of liquid flow rate under pressure The liquid passing speed under pressure is measured using a measuring method and measuring apparatus described in JP-A No. 2003-235889. That is, in a 100 mL glass beaker, a sufficient amount of physiological saline (0.9% by mass sodium chloride aqueous solution) to swell the measurement sample water-absorbing polymer 0.32 ⁇ 0.005 g, for example, saturation of the water-absorbing polymer. Immerse in physiological saline more than 5 times the amount of absorption and leave for 30 minutes.
- a wire mesh mesh opening 150 ⁇ m, biocolumn sintered stainless steel filter 30SUS sold by Sansho Co., Ltd.
- a capillary with an inner diameter of 2 mm
- a filtration cylindrical tube having an inner diameter of 4 mm and a length of 8 cm is prepared, and the contents of the beaker including the swollen measurement sample are put into the cylindrical tube with the cock closed.
- a cylindrical rod having a diameter of 2 mm with a wire mesh having an opening of 150 ⁇ m and a diameter of 25 mm is inserted into the filtration cylindrical tube so that the wire mesh and the measurement sample are in contact with each other.
- T1 the liquid flow rate under pressure at 2.0 kPa is calculated from the following equation.
- T0 (seconds) is a value obtained by measuring the time required for 20 ml of physiological saline to pass through the wire mesh without putting a measurement sample in the filtration cylindrical tube.
- the centrifugal retention amount (water absorption amount) is preferably 20 g / g or more, and 25 g / G or more, more preferably 50 g / g or less, even more preferably 45 g / g or less, and specifically 20 g / g or more and 50 g / g or less.
- it is more preferably 25 g / g or more and 45 g / g or less.
- the centrifugal retention amount (water absorption amount) is preferably 25 g / g or more, and 30 g / g. More preferably, it is preferably 65 g / g or less, more preferably 55 g / g or less, specifically 25 g / g or more and 65 g / g or less, More preferably, it is 30 g / g or more and 55 g / g or less.
- the centrifugal retention amount (water absorption amount) is determined by the following measurement method.
- the centrifugal retention amount (water absorption amount) is measured according to JIS K 7223 (1996).
- Nylon woven fabric (sold by Sanriki Seisakusho, product name: nylon net, standard: 250 mesh) is cut into a rectangle with a width of 10 cm and a length of 40 cm, folded in half at the center in the longitudinal direction, and heat sealed at both ends to a width of 10 cm
- a nylon bag having an inner dimension of 9 cm and a length of 20 cm is prepared.
- 1.00 g of the water-absorbing polymer as a measurement sample is precisely weighed and placed uniformly at the bottom of the produced nylon bag.
- the nylon bag containing the sample is immersed in physiological saline (0.9 mass% sodium chloride aqueous solution) adjusted to 25 ° C. After 1 hour from the start of immersion, the nylon bag is taken out from the physiological saline, suspended in a vertical state for 1 hour and drained, and then dehydrated using a centrifugal dehydrator (model H-130C special model manufactured by Kokusan Co., Ltd.). The dehydration condition is 143 G (800 rpm) for 10 minutes. After dehydration, the mass of the sample is measured, and the target centrifugal retention amount (water absorption amount) is calculated according to the following formula.
- Centrifugal retention amount (g / g) (a′ ⁇ bc) / c
- a ′ is the total mass (g) of the sample and nylon bag after centrifugal dehydration
- b is the mass (g) of the nylon bag before water absorption (during drying)
- c is the mass of the sample before water absorption (during drying).
- the sheet-like material 1 shown in FIG. 1 described above is formed by using a plurality of absorbent units 4 each having a long base portion 2 having a uniform width
- the width of the long base portion 2 is as follows. It may be non-uniform.
- the water-absorbing polymer particles 3 are unevenly distributed and fixed, and the portion having a relatively large basis weight of the fixed water-absorbing polymer 3 has a long shape.
- the distance between the side edge portions 2s and 2s along the longitudinal direction (Y direction) of the base portion 2 may be relatively short.
- the portion between the side edges 2s, 2s of the long base portion 2 in the portion with a large basis weight of the fixed water-absorbing polymer 3 This distance may be shorter than the distance between the side edges 2s, 2s of the long base portion 2 in the portion where the basis weight of the fixed water-absorbing polymer 3 is small.
- adjacent absorbent units 4 and 4 are easily movable in the thickness direction (Z direction) in a portion where the basis weight of the fixed water-absorbing polymer 3 is large, Since the sheet-like material 1 is hard to become hard and the absorption performance of the water-absorbing polymer particles 3 can be maximized, the absorption performance of the sheet-like material 1 is easily improved.
- the sheet-like object 1 shown in FIG. 3 described above is formed by arranging so that the longitudinal direction (Y direction) of each of the plurality of absorbent units 4 faces the longitudinal direction (Y direction) of the sheet-like object 1.
- the plurality of absorbent units 4 are arranged so that the longitudinal direction (Y direction) faces the lateral direction (X direction) of the sheet 1.
- the sheet-like object 1 shown in FIG. 13 includes non-slit regions NT on both sides along the vertical direction (Y direction).
- the sheet-like object 1 may be formed by arranging the absorbent units 4 such that the longitudinal direction (Y direction) faces a plurality of directions.
- the longitudinal direction (Y direction) of each of the plurality of absorbent units 4 is the longitudinal direction (Y direction) of the sheet-like material 1.
- the longitudinal direction (Y direction) of each of the plurality of absorbent units 4 is a sheet shape.
- the form etc. which have the area
- each absorbent unit 4 and each long base portion 2 extend linearly in parallel to the vertical direction (Y direction). It only needs to extend in the direction (Y direction).
- each absorptive unit 4 and each long base part 2 may extend by repeating an S shape in the vertical direction (Y direction), or may extend in a jagged shape in the vertical direction (Y direction). Good.
- the sheet-like material 1 shown in FIGS. 7 and 10 described above includes the long base portions 2 disposed on the lower surface side of the water-absorbing polymer particles 3 and the water-absorbing polymer particles before use. 3 is arranged in the thickness direction (Z direction) with the respective elongated base portions 2 arranged on the upper surface side, but for example, like the sheet-like object 1 shown in FIG. X direction) may be shifted.
- an adhesive application process is provided in the post-process of the cutting process, and a water-absorbing polymer spraying process is provided in the post-process of the adhesive application process.
- a raising process may be provided instead of the adhesive application process. What is necessary is just to prepare such a raising process process in the front process of a cutting process. Examples of the raising method include a method described in JP2012-092476A, a method described in JP2013-028891A, and the like.
- FIG. 15 is a perspective view of a natural state of a disposable diaper 10 (hereinafter also simply referred to as “diaper 10”) which is an embodiment of the absorbent article of the present invention.
- FIG. 16 is a plan view of a state in which the diaper 10 shown in FIG. 15 is opened at its side seal portion S, developed in a plane, and extended from the top sheet side.
- the diaper 10 shown in FIGS. 15 and 16 is a so-called pants-type disposable diaper.
- the diaper 10 includes an absorbent main body 20 including a top sheet 21, a back sheet 22, and an absorbent body 23 interposed between the two sheets 21 and 22, and the article longitudinal direction Y corresponding to the wearer's front-rear direction and It has an article lateral direction X orthogonal to the article longitudinal direction Y.
- the diaper 10 includes an absorbent main body 20 and an exterior body 30 positioned on the non-skin facing surface side of the absorbent main body 20.
- the diaper 10 is divided into an abdominal side A disposed on the wearer's abdomen, a back side B disposed on the wearer's dorsal side, and a crotch C positioned therebetween. .
- the crotch portion C is a region in which a side edge of an exterior body 30 to be described later is bound inward in the article lateral direction X, and is disposed in the crotch portion of the wearer when the diaper 10 is worn.
- the back side portion A is a region located on the abdomen side of the wearer from the crotch portion C when the diaper 10 is worn.
- the back side portion B is a region located on the back side of the wearer from the crotch portion C when the diaper 10 is worn.
- the diaper 10 has an article thickness direction Z in its thickness direction.
- the skin opposing surface side means the side (surface) arranged on the skin side of the wearer in the wearing state of the diaper 10 among the front and back both sides (surface) of each member of the diaper 10. That is.
- the “non-skin facing surface side” is a side (surface) arranged on the opposite side to the wearer's skin side in the wearing state of the diaper 10 among the front and back sides (surfaces) of each member of the diaper 10.
- the “article longitudinal direction Y” is a direction extending from the abdominal side A to the back side B in the diaper 10 in a state of being developed on a plane.
- the “article lateral direction X” is a direction orthogonal to the article longitudinal direction Y of the diaper 10 in a state of being developed on a plane, and is the width direction of the diaper 10 in a state of being developed on a plane.
- the absorbent main body 20 has a vertically long rectangular shape as shown in FIG. 16, and the article longitudinal direction Y is made to coincide with the article longitudinal direction Y of the diaper 10, so As shown in B, it is joined to the central portion in the article transverse direction X of the outer package 30 by a known joining means such as a hot melt adhesive.
- a known joining means such as a hot melt adhesive.
- both side edge portions of the portion located on the ventral side portion A and both side edge portions of the portion located on the back side portion B are joined to each other by known joining means such as heat sealing and ultrasonic sealing. Yes. Accordingly, a pair of side seal portions S is formed on the diaper 10.
- a waist opening WO and a pair of leg openings LO and LO are formed in the diaper 10 by the joining, and the exterior body 30 has a pant-shaped three-dimensional shape.
- the outer package 30 includes an inner layer sheet 31 and an outer layer sheet 32, and a thread-like elastic member 33 at each part fixed between the two sheets.
- the inner layer sheet 31 and the outer layer sheet 32 have the same shape in the article lateral direction X.
- the outer layer sheet 32 extends from the front and rear ends of the inner layer sheet 31, and the extending portion 32 ⁇ / b> E covers the article longitudinal direction Y front and rear end areas of the absorbent main body 20.
- the outer edge of the exterior body 30 forms the outline of the unfolded diaper 10.
- the thread-like elastic member 33 is disposed between the inner layer sheet 31 and the outer layer sheet 32 as shown in FIGS. 15 and 16, and forms a waist gather at the peripheral edge of the waist opening WO.
- the waistline elastic member 33D for forming a waistline gather is provided in the region up to the above.
- the waist elastic member 33W, the leg elastic member 33L, and the waist elastic member 33D are joined and fixed by a joining means such as a hot melt adhesive in an expanded state.
- the absorbent main body 20 includes an absorber 23 as shown in FIG.
- the absorbent body 23 has an absorbent core 24 and a liquid-permeable core wrap sheet 25 that covers the absorbent core 24.
- the absorbent core 24 has a rectangular shape that is long in the article longitudinal direction Y in plan view.
- the absorbent body 23 is formed by covering the entire absorbent core 24 with a core wrap sheet 25.
- a so-called sublayer sheet may be disposed on at least one of the skin facing surface and the non-skin facing surface of the absorbent body 23.
- the absorbent core 24 includes a transverse direction (x1 direction), a longitudinal direction (y1 direction) longer than the transverse direction (x1 direction), and a thickness direction (z1).
- Direction and water-absorbing polymer particles 3 (hereinafter also simply referred to as “water-absorbing polymer 3”) fixed to the surface of one surface of the long base portion 2.
- a plurality of the absorptive units 4 are provided, and each absorptive unit 4 is formed from a sheet-like material 1 that is arranged so that its longitudinal direction (y1 direction) faces at least one direction.
- the horizontal direction (x1 direction), the vertical direction (y1 direction), and the thickness direction (z1 direction) of the long base portion 2 are the horizontal direction (x1 direction) and the vertical direction (y1 direction) of the absorbent unit 4.
- the thickness direction (z1 direction) As shown in FIG. 17, the sheet-like material 1 that is the absorbent core 24 has a vertically long rectangular shape that is long in the article longitudinal direction Y and short in the article transverse direction X in plan view. Is aligned with the article longitudinal direction Y of the absorbent main body 20 or the article longitudinal direction Y of the diaper 10 so as to extend from the ventral side A to the back side B.
- the thickness direction (z1 direction) of the elongate base portion 2 and the thickness direction (z1 direction) of the absorbent unit 4 coincide with the article thickness direction Z.
- the absorbent core 24 formed from the sheet-like article 1 has a central central region CT in the lateral direction X of the article and the lateral direction of the article relative to the central area CT in plan view as shown in FIG.
- a pair of side regions ST, ST provided outside X is provided.
- the central region CT is located at the center in the article transverse direction X of the absorbent core 24, and extends between both ends of the absorbent core 24 in the article longitudinal direction Y.
- the pair of side regions ST and ST are located outside the article lateral direction X with respect to the central region CT, and extend between both ends of the absorbent core 24 in the article longitudinal direction Y.
- FIG. 18 and 19 are cross-sectional views schematically showing the sheet-like material 1 that is the absorbent core 24.
- FIG. The sheet-like material 1 shown in FIG. 18 shows a state before the water-absorbing polymer particles absorb the liquid (hereinafter, also simply referred to as “state before use”).
- the sheet-like material 1 shown in FIG. 19 shows a state in which the water-absorbing polymer particles have absorbed the liquid and swelled (hereinafter also simply referred to as “the state after swelling”).
- the state after swelling means the state of the water-absorbing polymer particles after the sheet-like material 1 is immersed for 60 minutes in a physiological saline (0.9 mass% sodium chloride aqueous solution) adjusted to 25 ° C. To do.
- each absorbent unit 4 is arranged so that its longitudinal direction (y1 direction) faces the article lateral direction X.
- each side region ST is formed by arranging a plurality of absorbent units 4 such that the longitudinal direction (y1 direction) of the absorbent units 4 faces the article lateral direction X of the sheet-like article 1.
- each absorbent unit 4 is preferably arranged in parallel to the article lateral direction X so that the plurality of absorbent units 4 do not cross each other.
- the longitudinal direction (y1 direction) of the absorbent unit 4 is a sheet shape.
- the sheet 1 is formed in parallel with the article transverse direction X of the sheet-like article 1 so as to face the article transverse direction X, and juxtaposed with the article longitudinal direction Y.
- each side region ST As shown in FIG. 17, between the absorbent units 4 and 4 adjacent in the lateral direction (x1 direction) of the elongated base portion 2 (absorbent unit 4), From the viewpoint of ease of movement, inclusions are not present. That is, the absorptive unit 4 in each side region ST is not wrapped with inclusions.
- substrate part 2 is a skin opposing surface which opposes a wearer's skin
- substrate part 2 is a back surface It is a non-skin facing surface that faces the sheet.
- the vertical direction (y1 direction) is an article vertical direction.
- the central region CT is formed by arranging a plurality of absorbent units 4 such that the longitudinal direction (y1 direction) of the absorbent unit 4 faces the article longitudinal direction Y of the sheet-like material 1. ing. More preferably, it is preferable that each absorbent unit 4 is arranged in parallel to the article longitudinal direction Y so that the plurality of absorbent units 4 do not cross each other.
- the longitudinal direction (y1 direction) of the absorbent unit 4 is a sheet-like object.
- the sheet-like article 1 is formed in parallel with the article longitudinal direction Y so as to face the article longitudinal direction 1 and juxtaposed with the article transverse direction X.
- the inclusion is in a non-existing state. That is, the absorptive unit 4 in the central region CT is not wrapped with inclusions.
- the sheet-like material 1 that is the absorbent core 24 has an absorbent region AT in which a plurality of absorbent units 4 are arranged so as to face in one direction as shown in FIG. 17 in a state before use.
- each absorbent region 4 is arranged in each side region ST so that the longitudinal direction (y1 direction) faces the article lateral direction X in the diaper 10.
- the central region CT and the region where the absorbent units 4 are arranged so that the longitudinal direction (y1 direction) faces the article longitudinal direction Y.
- the ratio of the absorption region AT to the entire sheet-like material 1 is 20% from the viewpoint of easily absorbing the liquid in the region where the water-absorbing polymer particles 3 are fixed, in a plan view of the sheet-like material 1 before use.
- the ratio of the absorption region AT is 100%, for example, in each side region ST in which the absorbent units 4 are arranged so that the longitudinal direction (y1 direction) faces the article lateral direction X, Each absorbent unit 4 is arranged between both side portions along the article longitudinal direction Y of each side region ST, and each absorbent unit 4 is arranged so that the longitudinal direction (y1 direction) faces the article longitudinal direction Y.
- each absorbent unit 4 means the form arrange
- each side region ST when the absorbent unit 4 is arranged so that the longitudinal direction (y1 direction) is directed to the article lateral direction X, ten or more absorbent units 4 are arranged in each side region ST.
- 50 or more are arranged, more preferably 3500 or less, more preferably 1700 or less, more specifically, 10 to 3500. It is preferable that it is arranged below, and it is more preferable that 50 or more and 1700 or less are arranged.
- the central region CT when arranging the absorbent unit 4 so that the longitudinal direction (y1 direction) is directed to the article longitudinal direction Y, it is preferable that two or more absorbent units 4 are arranged in the central region CT. More preferably, 10 or more are arranged, more preferably 1000 or less, more preferably 500 or less, more specifically, 2 or more and 1000 or less. It is preferable that 10 or more and 500 or less are arranged. In the central region CT, if the absorbent unit 4 is arranged so that the longitudinal direction (y1 direction) thereof faces the article lateral direction X, ten or more absorbent units 4 are arranged in the central region CT.
- 50 or more are arranged, more preferably 3500 or less, more preferably 1700 or less, more specifically 10 or more. It is preferable that 3500 or less are arranged, and it is more preferable that 50 or more and 1700 or less are arranged.
- the sheet-like material 1 that is the absorbent core 24 includes a non-slit region NT in which a plurality of long base portions 2 are connected to the article transverse direction X at both ends in the article longitudinal direction Y, or both side parts along the article longitudinal direction Y.
- non-slit areas NT1, NT1 are provided at both ends of the article longitudinal direction Y.
- non-slit regions NT2 and NT2 are provided on both sides along the longitudinal direction Y of the article.
- the non-slit regions NT are provided at both ends in the article longitudinal direction Y and both ends in the article lateral direction X of the base sheet. Are provided, and a plurality of long base portions 2 formed by a cutting process described later are provided between the non-slit regions NT.
- the sheet shape of the sheet-like object 1 is easily maintained in a state before use, and the structure is less likely to be disturbed.
- the non-slit region NT (NT1, NT2), it is preferable that the water-absorbing polymer particles 3 are not arranged.
- the water-absorbing polymer particles 3 are not arranged in the non-slit region NT (NT1, NT2), even if the liquid is absorbed, the water-absorbing polymer particles 3 in the non-slit region NT (NT1, NT2).
- the sheet shape of the sheet-like material 1 is easily maintained, the structure is not easily disturbed, and the liquid-absorbing polymer 3 particles are easily absorbed in the region. There exists an effect that it is easy to balance the whole thing 1.
- both ends in the longitudinal direction Y of the article are fixed to the absorbent article from the viewpoint that it becomes difficult and the softness of the absorbent area AT is improved and it is difficult to give the wearer an uncomfortable feeling.
- the absorbent article to which both ends (non-slit regions NT1, NT1) of the article longitudinal direction referred to here is fixed is at least one absorptivity of the top sheet 21, the back sheet 22, and the core wrap sheet 25 in the diaper 10.
- the both ends of the article longitudinal direction Y are fixed to the absorbent article, it is more preferable that the water-absorbing polymer particles 3 are not fixed to the non-slit region NT1.
- the part in which the absorptive units 4 are arranged in the central region CT is not fixed to the absorptive article from the viewpoint that the softness of the absorptive region AT is improved and the wearer does not feel uncomfortable.
- both side portions along the longitudinal direction Y of the article are fixed to the absorbent article from the viewpoint that it becomes difficult to be disturbed and the softness of the absorption area AT is improved and it is difficult to give the wearer an uncomfortable feeling.
- the absorbent article to which both side portions (non-slit regions NT2, NT2) along the article longitudinal direction Y are fixed is the absorption of at least one of the top sheet 21, the back sheet 22, and the core wrap sheet 25 in the diaper 10.
- the distance between the side edges along the longitudinal direction (y1 direction) of the long base portion 2 has the same meaning as the width of the long base portion 2 (length in the lateral direction (x1 direction)). is there.
- one long base portion 2 width (W2S) (W2S) arranged in each side region ST from the viewpoint of reducing a sense of discomfort at the crotch portion ( The length in the horizontal direction (x1 direction) (see FIG. 17) is the width (W2C) of one long base portion 2 arranged in the central region CT (length in the horizontal direction (x1 direction)) ( Shorter than that shown in FIG.
- W2C width of one long base portion 2 arranged in the central region CT
- the width of the central region CT is smaller than the width of each side region ST, from the viewpoint of fit around the legs when the side region ST stands up, one long length arranged in the central region CT.
- the width (W2C) (length in the lateral direction (x1 direction)) (see FIG. 17) of the scale-shaped base part 2 is one long base part 2 width (W2S) arranged in each side region ST ( It is preferable that the length is shorter than the length in the lateral direction (x1 direction) (see FIG. 17).
- the width (W2C) of one long base portion 2 with respect to the width (W1) of the sheet-like object 1 (see FIG. 17) (the length in the lateral direction (x1 direction)).
- the proportion of (see FIG. 17) is preferably 0.1% or more, more preferably 0.2% or more, from the viewpoint of reducing the uncomfortable feeling by improving the flexibility of the crotch part (improving flexibility). And it is preferably 20% or less, more preferably 4% or less, specifically, preferably 0.1% or more and 20% or less, and 0.2% or more and 4% or less. More preferably.
- the width (W2C) of the elongated base portion 2 in the central region CT is preferably 0.3 mm or more, more preferably 0.6 mm or more, and 10 mm from the same viewpoint. Or less, more preferably 2 mm or less, specifically 0.3 mm or more and 10 mm or less, more preferably 0.6 mm or more and 2 mm or less.
- the sheet-like material 1 has a width (W1) of 50 mm or more and 300 mm or less.
- the length (L2C) of one long base portion 2 (length in the longitudinal direction (y1 direction)) with respect to the length (L1) of the sheet-like object 1 (see FIG. 17)
- the ratio of (see Fig. 17) is preferably 2% or more, more preferably 20% or more, and preferably 100% or less, and 98% or less from the same viewpoint. More preferably, it is preferably 2% or more and 100% or less, and more preferably 20% or more and 98% or less.
- the length (L2C) of the long base portion 2 in the central region CT is preferably 20 mm or more, more preferably 200 mm or more, and 1000 mm or less from the same viewpoint.
- the sheet-like object 1 has a length (L1) of about 100 mm to 1000 mm.
- the length (L2S) (length in the longitudinal direction (y1 direction) of one long base portion 2 with respect to the width (W1) (see FIG. 17) of the sheet-like object 1
- the ratio of (see FIG. 17) is preferably 1.5% or more, more preferably 3% or more, and 47% from the viewpoint of maintaining the shape of each side region ST when standing. Or less, more preferably 40% or less, specifically 1.5% or more and 47% or less, and further preferably 3% or more and 40% or less.
- the length (L2S) of the elongated base portion 2 in each side region ST is preferably 5 mm or more, more preferably 10 mm or more, and 140 mm or less from the same viewpoint.
- it is 120 mm or less, specifically 5 mm or more and 140 mm or less, more preferably 10 mm or more and 120 mm or less.
- the width (W2S) (the length in the lateral direction (x1 direction) of one long base portion 2 with respect to the length (L1) of the sheet-like material 1 (see FIG. 17).
- the ratio of (see FIG. 17) is preferably 0.03% or more, and more preferably 0.06% or more, from the viewpoint of fitability around the legs when each side region ST stands. Preferably, it is 10% or less, more preferably 2% or less, specifically 0.03% or more and 10% or less, preferably 0.06% or more and 2% or less. More preferably.
- the width (W2S) of the elongated base portion 2 in each side region ST is preferably 0.3 mm or more, more preferably 0.6 mm or more from the same viewpoint, and It is preferably 10 mm or less, more preferably 2 mm or less, specifically, preferably 0.3 mm or more and 10 mm or less, and more preferably 0.6 mm or more and 2 mm or less.
- the elongated base portion 2 constituting the absorbent unit 4 is preferably a hydrophilic sheet from the viewpoint of improving the utilization efficiency of the water-absorbent polymer 3 because the liquid is easily diffused in the absorption region AT.
- the hydrophilic sheet include paper, non-woven fabric, cloth, synthetic sponge formed by foaming synthetic resin, etc. Among them, even if it is thin, the tensile strength is relatively high, and it is thin and can be given flexibility. Therefore, a nonwoven fabric is preferably used.
- a hydrophilic non-woven fabric containing hydrophilic fibers as constituent fibers, a hydrophilic non-woven fabric containing synthetic fibers imparted with hydrophilicity as constituent fibers, and the like are preferably used.
- the basis weight of the nonwoven fabric is preferably 5 g / m 2 or more and 100 g / m 2 or less, more preferably 10 g / m 2 or more and 40 g / m 2 or less.
- polyacrylic acid Soda (acrylic acid-vinyl alcohol) copolymer, crosslinked polyacrylic acid soda, (starch-acrylic acid) graft polymer, (isobutylene-maleic anhydride) copolymer and saponified product thereof, potassium polyacrylate,
- cesium polyacrylate and the like can be mentioned, and one of these can be used alone or two or more of them can be used in combination.
- water-absorbing polymer particles 3 there are an irregular type, a block type, a bowl type, a spherical particle aggregation type, a spherical type, etc., due to the difference in shape.
- a spherical type is used.
- a method of fixing the water-absorbing polymer particles 3 to the surface of the long base portion 2 a method using an adhesive, a method of chemically fixing using hydrogen bonding or the like, or a long base portion 2 is used. Is a non-woven fabric or cloth, there is a method of raising the constituent fibers and fixing them between the raised constituent fibers.
- the sheet-like material 1 shown in FIGS. It is used. That is, the water-absorbing polymer particles 3 of the sheet-like material 1 are fixed to the long base portion 2 via the adhesive 5. In this way, when the water-absorbing polymer particles 3 are fixed to the surface of the long base portion 2 via the adhesive 5, the water-absorbing polymer is in a state before use or after swelling of the sheet-like material 1. The particles 3 are difficult to drop off.
- a hot-melt adhesive is preferably used.
- the hot melt adhesive include styrene and olefin.
- Styrene-based hot melt adhesives include styrene-butadiene-styrene copolymer (SBS), styrene-isoprene-styrene copolymer (SIS), and styrene-ethylene-butylene-styrene copolymer that is a hydrogenated product of SBS. (SEBS) and blended hot-melt adhesives obtained by blending two or more of these can be used.
- a blended hot-melt adhesive of SIS and SBS or a blended hot-melt adhesive of SIS and SEBS is preferably used.
- the application amount of the hot melt adhesive is preferably 0.5 g / m 2 or more and 100 g / m 2 or less, more preferably 5 g / m 2 or more and 50 g / m 2 or less.
- the water-absorbing polymer particles 3 may be fixed only on the surface of one surface (upper surface or lower surface) of each long base portion 2. From the viewpoint of improving the performance, in the sheet-like object 1 shown in FIG. 18, not only the surface of one surface (upper surface) of each long base portion 2 but also the surface of the other surface (lower surface) is fixed. .
- the particles 3 are preferably the same type of polymer.
- the particles 3 are preferably the same type of polymer.
- the water-absorbing polymer particles 3 disposed on the surface of one surface (upper surface) of the central region CT and the water-absorbing polymer particles 3 disposed on the surface of the other surface (lower surface) Will be described as an example.
- the other surface (lower surface) of the long base portion 2 from the viewpoint of further achieving the above effect. It is preferable that the basis weight of the water-absorbing polymer 3 fixed on the surface is larger than the basis weight of the water-absorbing polymer 3 fixed on the surface of one surface (upper surface) of the elongated substrate portion 2. .
- the basis weight of the water-absorbing polymer 3 to be fixed to the surface of one surface (upper surface) of the long base portion 2 is preferably 10 g / m 2 or more and 250 g / m 2 or less, and 30 g / m 2 or more and 150 g / m 2.
- the basis weight of the water-absorbing polymer 3 to be fixed to the surface of the other surface (lower surface) of the elongated base portion 2 is preferably 30 g / m 2 or more and 400 g / m 2 or less, and 50 g / m 2 or more and 300 g / m 2. More preferably, it is m 2 or less.
- the basis weight of the water-absorbing polymer 3 fixed to the skin facing surface side in the long base portion 2 and the basis weight of the water-absorbing polymer 3 fixed to the non-skin facing surface side in the long base portion 2 are as follows. Measure by the method.
- the water-absorbing polymer is fixed again from the upper surface of the water-absorbing polymer with an adhesive or the like.
- the adhesive polymer is peeled from the long base portion 2 using a solvent or the like, and the adhesive adhering to the water-absorbing polymer is washed.
- the weight of the water-absorbing polymer fixed on the skin facing surface side was measured, and the area of the long base portion 2 where the water-absorbing polymer was fixed was peeled off from the water-absorbing polymer. From the weight, the weight of the water-absorbing polymer fixed per unit area is calculated, and the basis weight of the water-absorbing polymer on the skin facing surface side is calculated. Five measurements are taken and the average value is calculated. The basis weight of the water-absorbing polymer on the non-skin facing surface side is similarly calculated by fixing the water-absorbing polymer on the skin-facing surface side, peeling off and cleaning the water-absorbing polymer on the non-skin facing surface side.
- the water-absorbing polymer particles 3 are fixed to the surfaces of both surfaces (upper and lower surfaces) of each long base portion 2, a large amount of liquid is applied to the surface of the non-skin facing surface (lower surface) far from the wearer's skin.
- the water-absorbing polymer 3 fixed to the surface of one surface (upper surface) of the elongated base portion 2 is: Compared to the water-absorbing polymer 3 fixed to the surface of the other surface (lower surface) of the long base portion 2, it is preferable that the liquid passing performance under pressure is high and the centrifugal retention amount is low.
- the kind of the water-absorbing polymer 3 fixed on the surface of one surface (upper surface) of the long base portion 2 and the surface of the other surface (lower surface) of the long base portion 2 are fixed.
- the kind of the water-absorbing polymer 3 is preferably different.
- the different types of water-absorbing polymers mean that the liquid passing speed under pressure or the centrifugal retention amount is different. From the above viewpoint, with respect to the water-absorbing polymer 3 fixed to the surface of one surface (upper surface) of the long base portion 2, the liquid passing rate under pressure at 2.0 kPa is preferably 20 ml / min or more.
- the liquid passing rate under pressure at 2.0 kPa is preferably 0 ml / min or more.
- the liquid passing speed under pressure is determined by the following measuring method.
- ⁇ Measurement method of liquid flow rate under pressure The liquid passing speed under pressure is measured using a measuring method and measuring apparatus described in JP-A No. 2003-235889. That is, in a 100 mL glass beaker, a sufficient amount of physiological saline (0.9% by mass sodium chloride aqueous solution) to swell the measurement sample water-absorbing polymer 0.32 ⁇ 0.005 g, for example, saturation of the water-absorbing polymer. Immerse in physiological saline more than 5 times the amount of absorption and leave for 30 minutes.
- a wire mesh mesh opening 150 ⁇ m, biocolumn sintered stainless steel filter 30SUS sold by Sansho Co., Ltd.
- a capillary with an inner diameter of 2 mm
- a filtration cylindrical tube having an inner diameter of 4 mm and a length of 8 cm is prepared, and the contents of the beaker including the swollen measurement sample are put into the cylindrical tube with the cock closed.
- a cylindrical rod having a diameter of 2 mm with a wire mesh having an opening of 150 ⁇ m and a diameter of 25 mm is inserted into the filtration cylindrical tube so that the wire mesh and the measurement sample are in contact with each other.
- T1 the liquid flow rate under pressure at 2.0 kPa is calculated from the following equation.
- T0 (seconds) is a value obtained by measuring the time required for 20 ml of physiological saline to pass through the wire mesh without putting a measurement sample in the filtration cylindrical tube.
- the centrifugal retention amount (water absorption amount) is preferably 20 g / g or more, and 25 g / G or more, more preferably 50 g / g or less, even more preferably 45 g / g or less, and specifically 20 g / g or more and 50 g / g or less.
- it is more preferably 25 g / g or more and 45 g / g or less.
- the centrifugal retention amount (water absorption amount) is preferably 25 g / g or more, and 30 g / g. More preferably, it is preferably 65 g / g or less, more preferably 55 g / g or less, specifically 25 g / g or more and 65 g / g or less, More preferably, it is 30 g / g or more and 55 g / g or less.
- the centrifugal retention amount (water absorption amount) is determined by the following measurement method.
- the centrifugal retention amount (water absorption amount) is measured according to JIS K 7223 (1996).
- Nylon woven fabric (sold by Sanriki Seisakusho, product name: nylon net, standard: 250 mesh) is cut into a rectangle with a width of 10 cm and a length of 40 cm, folded in half at the center in the longitudinal direction, and heat sealed at both ends to a width of 10 cm
- a nylon bag having an inner dimension of 9 cm and a length of 20 cm is prepared.
- 1.00 g of the water-absorbing polymer as a measurement sample is precisely weighed and placed uniformly at the bottom of the produced nylon bag.
- the nylon bag containing the sample is immersed in physiological saline (0.9 mass% sodium chloride aqueous solution) adjusted to 25 ° C. After 1 hour from the start of immersion, the nylon bag is taken out from the physiological saline, suspended in a vertical state for 1 hour and drained, and then dehydrated using a centrifugal dehydrator (model H-130C special model manufactured by Kokusan Co., Ltd.). The dehydration condition is 143 G (800 rpm) for 10 minutes. After dehydration, the mass of the sample is measured, and the target centrifugal retention amount (water absorption amount) is calculated according to the following formula.
- Centrifugal retention amount (g / g) (a′ ⁇ bc) / c
- a ′ is the total mass (g) of the sample and nylon bag after centrifugal dehydration
- b is the mass (g) of the nylon bag before water absorption (during drying)
- c is the mass of the sample before water absorption (during drying).
- the water-absorbing polymer particles 3 swell beyond the side edge 2s along the longitudinal direction (y1 direction) of the elongated base 2. It is made like that.
- the swelling of the water-absorbing polymer particles 3 beyond the side edge 2s of the elongated base portion 2 means, in other words, the swollen water absorption shown in FIG. It means that the swollen water-absorbing polymer particles 3 exist across the side edge portion 2s of the elongated base portion 2 like the conductive polymer particles 3a.
- the water-absorbing polymer particles 3 may be present on the inner side of the side edge portion 2s of the elongated base portion 2, or, for example, before use (before swelling) shown in FIG. Like the water-absorbing polymer particles 3 b, the water-absorbing polymer particles 3 may be present across the side edge 2 s of the long base portion 2 from the beginning.
- the position of the water-absorbing polymer particles 3 in the elongated base portion 2 is shifted up and down in the thickness direction (z1 direction). It is made different from the position before absorbing the liquid.
- the position of the elongated base portion 2 is different from the position before absorbing the liquid in the thickness direction (z1 direction).
- the position of the long base portion 2 in the state after swelling of the long base portion 2 is different from the position of the long base portion 2 in the state before use of the water-absorbing polymer particles 3 (before swelling).
- the sheet-like material 1 that is the absorbent core 24 is formed on both surfaces (upper surface and lower surface) of each long base portion 2.
- the basis weight of the water-absorbing polymer 3 of the absorbent unit 4 arranged in the central region CT is that the basis weight of the water-absorbing polymer 4 of the absorbent unit 4 arranged in each side region ST of the sheet 1 that is the absorbent core 24.
- the basis weight is preferably larger than 3.
- the basis weight of the water absorbent polymer 3 of the absorbent unit 4 disposed in the central region CT is preferably 30 g / m 2 or more and 400 g / m 2 or less, and 50 g / m 2 or more and 300 g. / M 2 or less is more preferable.
- the basis weight of the water-absorbing polymer 3 of the absorbent unit 4 disposed in each side region ST is preferably 10 g / m 2 or more and 250 g / m 2 or less, and 30 g / m 2 or more. More preferably, it is 150 g / m 2 or less.
- the topsheet 21 covers the entire skin-facing surface of the absorbent body 23 having the absorbent core 24, and the side of the article from both side edges of the absorbent body 23. It has the extension site
- the non-skin facing surface of the absorber 23 to be covered is covered.
- the absorbent main body 20 includes a top sheet 21 that covers the skin facing surface of the absorbent core 24 and a back sheet 22 that covers the non-skin facing surface of the absorbent core 24.
- the top sheet 21 is a sheet that is liquid-permeable and faces the wearer's skin when the diaper 10 is worn.
- the topsheet 21 covers the entire area in the article longitudinal direction Y of the sheet-like material 1 that is the absorbent core 24, and the leading end 21 ⁇ / b> E ⁇ b> 1 of the extension part 21 ⁇ / b> E of the topsheet 21 is the sheet-like material 1 that is the absorbent core 24. It extends to each non-skin facing surface of the absorber 23 located in the central region CT.
- the back sheet 22 covers the entire area in the article longitudinal direction Y of the sheet-like material 1 that is the absorbent core 24, and also covers the entire area in the article lateral direction X.
- the back sheet 22 is a sheet that is made of a liquid-impermeable or water-repellent sheet and faces the exterior body 30.
- the extension part 21 ⁇ / b> E of the topsheet 21 has an end portion 21 ⁇ / b> E ⁇ b> 1 located on the non-skin facing surface side with respect to the extension part 21 ⁇ / b> E and adjacent to the extension part 21 ⁇ / b> E. It is being fixed to the component of a property article.
- the absorbent main body 20 has a pair of leak-proof cuffs 26 and 26 on both sides along the article longitudinal direction Y.
- the leak-proof cuff 26 folds the water-repellent sheet material 27 having a rectangular shape in the longitudinal direction Y of the article into two, and folds the side area of the sheet material 27 in the folded state into the back sheet 22 and the top sheet 21. Between the extension portion 21E and the fixed portion. That is, in the diaper 10, the constituent member of the absorbent article on the non-skin facing surface side to which the front end portion 21 ⁇ / b> E ⁇ b> 1 of the topsheet 21 is fixed is the sheet material 27 that forms the leak-proof cuff 26. By this joining, a joining portion 28 extending in the article longitudinal direction Y is formed.
- the joint portion 28 includes a sheet material 27 that forms a leak-proof cuff 26 and a topsheet 21 using known joining means such as heat sealing, high-frequency sealing, ultrasonic sealing, and hot-melt adhesive. It is formed by joining the front-end
- FIG. Note that the joint portion 28 may be formed in a continuous linear shape, and is not limited thereto, and may be formed in a discontinuous linear shape having intermittent portions in some places, or continuous or discontinuous. It may be formed in a curved shape or the like.
- the position where the front end 21E1 of the topsheet 21 is fixed to the sheet material 27 forming the leak-proof cuff 26, that is, the position of the joint 28 is the absorbent core 24 as shown in FIG. It coincides with a position BP corresponding to the boundary between the central region CT of the sheet-like object 1 and each side region ST.
- the position of the joint portion 28 and the position BP corresponding to the boundary overlap in the article thickness direction Z as viewed in cross section.
- the folded sheet material 27 has its fold line positioned inward in the article lateral direction X, and a thread-like elastic member inside the position of the fold line. 29a is fixed in the extended state. As the elastic member 29a contracts, the leak-proof cuff 26 stands up toward the wearer's skin when the diaper 10 is worn.
- a thread-like elastic member 29b extends in the folded sheet material 27 forming the leak-proof cuff 26. It is fixed in the state.
- the elastic member 29 b is disposed between the thread-like elastic member 29 a and the joint portion 28 in the leak-proof cuff 6, and is arranged over the entire article longitudinal direction Y of the leak-proof cuff 26.
- the thread-like elastic member 29b is disposed at a position X outward in the lateral direction of the article from the thread-like elastic member 29c disposed on the side portion of the absorber 23 described later in the unfolded state of the diaper 1.
- the elastic member 29c is distribute
- the elastic member 29 c is arranged over the entire length of the article-shaped direction Y of the sheet-like material 1 that is the absorbent core 24.
- the elastic member 29c is located between the core wrap sheet 25 constituting the absorber 23 and the top sheet 21, and is bonded to both sheets.
- region ST of the absorptive core 24 stands up toward a wearer's skin side by the contraction force of the elastic member 29c.
- the constituent material of each part of the disposable diaper 10 mentioned above is demonstrated.
- the constituent material of each part those usually used in the technical field can be used without particular limitation.
- a hydrophilic and liquid-permeable nonwoven fabric or an apertured film can be used.
- a liquid-impermeable material or a water-repellent material can be used.
- a resin film, a laminate material of a resin film and a nonwoven fabric, or the like can be used.
- As the water-repellent material a water-repellent nonwoven fabric or the like can be used.
- water-repellent nonwoven fabric a nonwoven fabric described later that is used as the sheet material 27 for forming the leak-proof cuff 26 can be used.
- core wrap sheet 25 a thin paper (tissue paper) manufactured by a wet papermaking method, a liquid-permeable nonwoven fabric, or the like can be used.
- a composite nonwoven fabric having a multilayer structure composed of spunbond, meltblown, spunbond, etc., a spunbond nonwoven fabric, a heat bond nonwoven fabric, an air-through nonwoven fabric, etc. can be used. From the viewpoint of properties, a multilayer nonwoven fabric composed of spunbond and meltblown is preferable.
- the inner layer sheet 31 and the outer layer sheet 32 forming the outer package 30 are preferably composed of the same or different breathable sheets, for example, non-woven fabrics manufactured by various methods.
- a spunbond nonwoven fabric is preferably used as the inner layer sheet 31 and the outer layer sheet 32.
- the thread-like elastic members 29a, 29b, and 29c used for the absorbent main body 20 thread rubber, a belt-like member having a predetermined width (flat rubber, etc.) and the like are preferable, and thread rubber is particularly preferable.
- the thread-like elastic member 33 (the waist elastic member 33W, the leg elastic member 33L, and the waist elastic member 33D) used for the exterior body 30 is preferably a thread rubber, a belt-like member having a predetermined width (flat rubber, etc.), Particularly preferred is rubber thread.
- the elastic members 29a, 29b, 29c, and the elastic member 33 are synthesized.
- examples thereof include rubber, EVA, stretchable polyolefin, and urethane.
- the absorbent core 24 of the absorbent body 23 is formed of a sheet-like material 1 including a plurality of absorbent units 4 each having the water-absorbing polymer 3.
- each absorptive unit 4 is arranged so that the vertical direction (y1 direction) may face the article horizontal direction X. Has been. Then, as shown in FIG.
- the surface sheet 21 covers the entire skin facing surface of the absorbent body 23, and has an extended portion 21 ⁇ / b> E that extends outward from the side edges of the absorbent body 23 in the lateral direction X of the article.
- the extension part 21E is folded back to the non-skin facing surface side of the absorbent body 23 to cover the non-skin facing surface of the absorbent body 23 located in each side region ST of the absorbent core 24.
- the distal end portion 21E1 of the extending portion 21E is fixed to the constituent member of the adjacent absorbent article by the joint portion 28.
- each absorbent unit 4 is arranged such that its longitudinal direction (y1 direction) faces the article lateral direction X, and the topsheet 2 is a sheet-like object 1 in which each absorbent unit 4 is arranged. 21 so as to wrap each side region ST, as shown in FIG. 21, the absorber of the side portion of the absorbent body 23 corresponding to each side region ST easily rises when worn, and the fit of the crotch C Leak-proof performance is improved, and it is difficult for the wearer to feel uncomfortable during wearing.
- the elastic member 29a As the leak-proof cuff 26 stands up, the absorber on the side portion of the absorber 23 is more likely to stand up. Furthermore, in the diaper 10, as shown in FIG. 21, the elastic members 29 c are arranged in an extended state at both side edges of the absorbent body 23, so that each side of the absorbent core 24 is contracted by the contraction force of the elastic members 29 c. The absorber 23 located in the region ST is further erected toward the wearer's skin. Furthermore, in the diaper 10, as shown in FIG. 21, since the thread-like elastic member 29b is arranged at a position outside the article lateral direction X from the elastic member 29c, the absorbent body 23 located in each side region ST is particularly arranged. Is easy to stand up.
- each absorbent unit 4 has its longitudinal direction (y1 direction) facing the article longitudinal direction Y.
- y1 direction facing the article longitudinal direction Y.
- the sheet-like material 1 that is the absorbent core 24 has a side edge portion 2 s of the elongated base portion 2 in which the water-absorbing polymer particles 3 are in a state after swelling as shown in FIG. 19.
- the liquid swells over (see the water-absorbing polymer particles 3a shown in FIG. 19), and the position of the water-absorbing polymer particles 3 in the elongated substrate 2 is in the thickness direction (Z direction, z1 direction). It is made different from the position before absorption. Therefore, as shown in FIG. 19, when the water-absorbing polymer particles 3 absorb and swell the body fluid, the side edges of the long base portion 2 between the adjacent absorbent units 4, 4.
- the adjacent absorbent units 4 and 4 can easily move freely in the thickness direction (Z direction, z1 direction), and the swollen water absorption
- the collision between the polymer particles 3 and 3 is alleviated, the pressure applied to the swollen water-absorbing polymer particles 3 can be reduced, and it is difficult to inhibit the absorption of the body fluid of the water-absorbing polymer particles 3. Therefore, the sheet-like material 1 that is the absorbent core 24 is less susceptible to swelling inhibition by the water-absorbing polymer particles 3 when the water-absorbing polymer particles 3 absorb the body fluid and swell.
- the sheet-like material 1 has no inclusions between the adjacent absorbent units 4, 4, so that the absorbent unit 4 is easy to move and the above effects can be more easily achieved. It has become.
- the sheet-like material 1 is in a state after swelling as shown in FIG. 19, where the positions of the long base portions 2 constituting the adjacent absorbent units 4 are in the thickness direction (Z direction, in the z1 direction). Therefore, the adjacent absorbent units 4 and 4 are easy to move freely in the thickness direction (Z direction, z1 direction), the collision between the swollen water-absorbing polymer particles 3 and 3 is easily relieved, and the swollen water absorption The pressure applied to the polymer particles 3 can be reduced, and the absorption of the body fluid of the water-absorbing polymer particles 3 is hardly inhibited.
- the water-absorbing polymer particles 3 in a swollen state are swollen beyond the side edge 2 s of the long base portion 2, and the adjacent absorbent units 4, 4 have a thickness.
- the long base portion 2 is preferably disposed in the vicinity of the side edge portion 2s along the longitudinal direction (y1 direction), and the water-absorbing polymer particles 3 exceed the side edge portion 2s of the long base portion 2. It is more preferable that it protrudes (see the water-absorbing polymer particles 3b shown in FIG. 18).
- the water-absorbing polymer particles 3 in a swollen state are swollen beyond the side edge 2 s of the long base portion 2, and the adjacent absorbent units 4, 4 are swollen.
- Both side edges along the longitudinal direction (y1 direction) of the elongated base portion 2 from the viewpoint of freely moving each other in the thickness direction (Z direction, z1 direction) and making the swelling inhibition of the water-absorbing polymer particles 3 more difficult.
- the distance between the parts 2s and 2s is larger than the average particle diameter of the water-absorbing polymer particles 3 before use (before swelling) and smaller than the average particle diameter of the water-absorbing polymer particles 3 after swelling. It is preferable.
- the distance between the side edges 2s, 2s of the long base portion 2 has the same meaning as the width (W2C) of the long base portion 2 described above.
- the average particle diameter of the water-absorbing polymer particles 3 before use (before swelling) is preferably 20 ⁇ m or more, more preferably 200 ⁇ m or more, and preferably 700 ⁇ m or less, 500 ⁇ m or less. More specifically, it is preferably 20 ⁇ m or more and 700 ⁇ m or less, and more preferably 200 ⁇ m or more and 500 ⁇ m or less.
- the average particle diameter of the water-absorbing polymer 3 in the swollen state is preferably 200 ⁇ m or more, more preferably 800 ⁇ m or more, and preferably 3000 ⁇ m or less, and 2000 ⁇ m or less. More preferably, specifically, it is preferably 200 ⁇ m or more and 3000 ⁇ m or less, and more preferably 800 ⁇ m or more and 2000 ⁇ m or less.
- the average particle diameter of the water-absorbing polymer particles 3 is determined by the following measuring method.
- the average particle diameter d1 in the state before use was determined by observing the diameter or major axis of the water-absorbing polymer particles with an optical microscope using the water-absorbing polymer particles before use.
- the diameter refers to the case where the water-absorbing polymer particles are spherical.
- the long axis refers to a case in which the water-absorbing polymer particles have an irregular shape such as a rhombus, rectangle, tuft, or football.
- the diameter or major axis of a total of 50 water-absorbing polymer particles is measured, and the number average particle diameter is defined as the average particle diameter d1 of the water-absorbing polymer particles in a state before use.
- the average particle diameter d2 in the swollen state is such that the sheet 1 is immersed in a physiological saline (0.9 mass% sodium chloride aqueous solution) adjusted to 25 ° C., and the sheet 1 is 1 hour after the start of the immersion.
- a physiological saline 0.1% sodium chloride aqueous solution
- the diameter here refers to the case where the water-absorbing polymer particles are spherical.
- the long axis refers to a case in which the water-absorbing polymer particles have an irregular shape such as a rhombus, rectangle, tuft, or football.
- the diameter or major axis of a total of 50 water-absorbing polymer particles can be measured, and the number average particle diameter can be measured as the average particle diameter of the water-absorbing polymer particles in the swollen state.
- FIG. 22 shows a manufacturing apparatus 100 that is preferably used in the manufacturing method of the present embodiment.
- the manufacturing apparatus 100 of the present embodiment includes a base sheet cut part 110, an adhesive application part 120, and a water-absorbing polymer spray part 130 in this order from the upstream side to the downstream side of the manufacturing process.
- an apparatus in which the adhesive application unit 120 and the water absorbent polymer spraying unit 130 are integrated is used, but the adhesive application unit 120 and the water absorbent polymer spraying unit 130 are integrated. It does not have to be.
- the integrated device has a configuration in which an adhesive application unit 120 is disposed on the upstream side of the device, and a water-absorbing polymer spraying unit 130 is disposed on the downstream side of the integrated device.
- the base sheet cut part 110 is a part that cuts the strip-shaped base sheet 2b that is a raw material of the long base part 2 to form a plurality of long base parts 2.
- Various known cutting devices can be used without particular limitation for cutting the base sheet 2b.
- a plurality of cutter blades 111a on the peripheral surface shown in FIG. 111a, 111a,..., 111a,..., 111a,..., 111a, 111a, 111a,.
- a cutting device comprising: a rotary die 115b having a plurality of cutter blades 115a, 115a, 115a,... Disposed on a peripheral surface; and a receiving roll 116 having a flat peripheral surface disposed opposite to the rotary die 115b.
- One set of 117 is used.
- the upstream side cutting device 113 has a plurality of cutter blades at both ends in the axial direction of the roll so as to correspond to both side portions along the conveying direction (Yd1 direction) of the base sheet 2b.
- 111a, 111a, 111a... Are arranged.
- the plurality of cutter blades 111a, 111a, 111a,... Are arranged at intervals in the circumferential direction of the roll, and the direction of the blades is orthogonal to the conveyance direction (Yd1 direction) of the strip-shaped base sheet 2b. It is arranged in the direction (Xd1 direction).
- the interval between the cutter blades 111a, 111a adjacent to each other in the circumferential direction of the roll corresponds to the width W2S (see FIG. 17) of each long base portion 2 of the side region ST to be formed.
- the conveyance direction (Yd1 direction) of the base material sheet 2b corresponds to the article longitudinal direction Y of the sheet-like material 1 to be manufactured
- the orthogonal direction (Xd1 direction) is the sheet-like material 1 to be manufactured.
- the sheet-like object 1 includes the non-slit regions NT2 at both ends in the article lateral direction X like the sheet-like object 1 shown in FIG. 17, for example, as shown in FIG. What is necessary is just to make it form in the surface the non-arrangement part 114 which does not arrange
- the length of the circular arc of the non-arranged portion 114 on the peripheral surface of the roll having the rotating cutter blade 111a is that of the non-slit region NT1 arranged at both ends in the article longitudinal direction Y of the sheet 1 shown in FIG. It corresponds to the length equal to the total of the length in the article longitudinal direction Y.
- the length of the roll of the cutter blade 111a in the axial direction is the length L2S in the longitudinal direction (y1 direction) of the long base portion 2 of the side region ST of the sheet-like object 1 shown in FIG. 17 (see FIG. 17). ).
- the axial length of the roll of the cutter blade 111a corresponds to the non-slit region NT2. What is necessary is just to use the cutter blade 111a which does not extend to.
- the downstream cutting device 117 has a plurality of cutter blades 115a, 115a, 115a,... And a plurality of cutter blades 115a, 115a, 115a,.
- a cutting device 117 provided with a receiving roll 116 having a flat peripheral surface, which is opposed to the cutter blades 115a, 115a, 115a.
- the plurality of cutter blades 115a, 115a, 115a,... Of the cutting device 117 are respectively arranged so as to coincide with a direction (Xd1 direction) orthogonal to the conveyance direction (Yd1 direction) of the belt-like base sheet 2b.
- the interval between the cutter blades 115a and 115a adjacent to each other in the orthogonal direction (Xd1 direction) corresponds to the width W2C (see FIG. 17) of each long base portion 2 of the central region CT to be formed.
- the base sheet 2b may be cut by using a shear-cut type cutting device that rubs and cuts the side surfaces of the upper blade and the lower blade, or by using a laser device that melts by irradiating laser light. Good.
- the sheet-like object 1 includes the non-slit regions NT1 at both ends in the article longitudinal direction Y like the sheet-like object 1 shown in FIG. 17, for example, as shown in FIG.
- a non-arranged portion 118 in which the cutter blade 115a is not disposed may be formed on the surface.
- the length of the arc of the non-arranged portion 118 on the outer periphery of the rotating cutter blade 115a corresponds to a length equal to the total length in the article longitudinal direction Y of the non-slit region NT1 of the sheet-like object 1 shown in FIG.
- the non-arranged portions 118, 118 of the cutter blade 115a adjacent in the Xd1 direction are aligned and arranged. Use it.
- the arc length of the portion excluding the non-arranged portion 118 on the outer periphery of the rotating cutter blade 115a is the longitudinal direction (y1 direction) of the long base portion 2 of the central region CT of the sheet-like object 1 shown in FIG. ) Length L2C (see FIG. 17).
- the adhesive application part 120 located on the downstream side of the base sheet cut part 110 is a part that applies the adhesive 5 to the surface of one surface (upper surface) of the long base part 2.
- an application head 121 is provided.
- the coating head 121 is formed to have a length corresponding to the width of the absorption region AT of the sheet-like object 1 (the length in the article lateral direction X) in the Xd1 direction.
- the coating head 121 formed in this way is disposed on one surface (upper surface) of the long base portion 2 with a gap.
- the water-absorbing polymer spraying unit 130 located on the downstream side of the adhesive application unit 120 sprays the water-absorbing polymer particles 3 on the surface of one surface (upper surface) of the elongated base body 2 to dispose the absorbent unit 4.
- the manufacturing apparatus 100 includes a water-absorbing polymer introduction part 131.
- various known introduction devices can be used without particular limitation.
- the water-absorbing polymer introduction part 131 is formed to have a length corresponding to the width of the absorption region AT of the sheet-like material 1 (the length in the article lateral direction X) in the Xd1 direction.
- the water-absorbing polymer introduction part 131 formed in this way is disposed on one surface (upper surface) of the long base part 2 with a gap.
- the adhesive application unit 120 and the water-absorbing polymer spraying unit 130 are opposed to the integrated device, and the plurality of long base parts 2 to be conveyed are arranged.
- a vacuum conveyor 141 is disposed on the lower surface side.
- the vacuum conveyor 141 includes an endless breathable belt 144 laid across a drive roll 142 and a plurality of driven rolls 143, and a vacuum box disposed at a position facing the integrated device with the breathable belt 144 interposed therebetween. 145.
- On the vacuum conveyor 141 a plurality of long base parts 2 formed by cutting the base material sheet 2 b at the base material sheet cutting part 110 are introduced.
- the drive roll 151 which unwinds the base material sheet 2b from the raw fabric roll of the strip-shaped base material sheet 2b, and the precursor 1b of the manufactured sheet-like material 1b on the most downstream side. And a drive roll 152 for conveying the above.
- the manufacturing method of the sheet-like object 1 using the manufacturing apparatus 100 includes a water-absorbing polymer in a cutting process for cutting the strip-shaped base sheet 2b to form a plurality of long base portions 2, and a subsequent process of the cutting process.
- grains 3 is provided.
- coats the adhesive agent 5 is provided in the process before the particle
- the vacuum box 145 Prior to carrying out the cutting step, first, the vacuum box 145 is made negative by operating the exhaust device connected thereto.
- the drive roll 151 and the drive roll 152 are driven, the cutting device 113 and the breathable belt 144 are rotated, and the vacuum conveyor 141 is operated.
- the drive roll 151 feeds the base sheet 2b from the raw roll of the strip-shaped base sheet 2b, and between the receiving roll 112 and the roll having the plurality of cutter blades 111a in the cutting device 113 of the base sheet cutting section 110. And it supplies between the some cutter blade 115a and the receiving roll 116, and cuts the strip
- the strip-shaped base sheet 2b is supplied between a roll having a plurality of cutter blades 111a and the receiving roll 112 and cut, and then a plurality of A plurality of long base portions 2 are formed by being supplied between the cutter blade 115a and the receiving roll 116 and cut, and supplied between the plurality of cutter blades 115a and the receiving roll 116. May be cut and then supplied between the roll having the plurality of cutter blades 111a and the receiving roll 112 and cut to form a plurality of long base portions 2.
- a plurality of elongated base portions 2 are formed by cutting at a plurality of locations along the line. Moreover, the part cut with the cutter blade 111a becomes the side edge part 2s of the elongate base
- the non-arrangement part 114 which does not arrange
- the non-cut portion NTb corresponding to the length equal to the total length of the article longitudinal direction Y of the non-slit region NT1 is intermittently formed.
- the plurality of long base portions 2 in both side regions formed by the cutting device 113 on the upstream side of the cutting step are formed in parallel to the orthogonal direction (Xd1 direction), and the conveying direction (Yd1 direction) It is arranged side by side.
- a plurality of cutter blades 115a are arranged in the central region in the conveyance direction (Yd1 direction) of the base sheet 2b, and each cutter blade 115a is arranged to coincide with the direction (Xd1 direction) perpendicular to the transport direction (Yd1 direction) of the belt-shaped base sheet 2b, so that it is cut in the central region of the strip-shaped base sheet 2b, and A plurality of long base portions 2 are formed by cutting a plurality of locations along the transport direction (Yd1 direction) at intervals in a direction orthogonal to the central region (Xd1 direction). Further, the portion cut by the cutter blade 115a becomes the side edge portion 2s of the elongated base portion 2 disposed in the central region CT.
- each of the plurality of cutter blades 115a has the non-arrangement portion 118
- the position of the non-arrangement portion 118 is formed by the upstream cutting device 113.
- the non-cut portion corresponding to the length equal to the total length in the article longitudinal direction Y of the non-slit region NT1 is intermittently applied to the belt-shaped base sheet 2b to be conveyed.
- NTb is formed.
- the plurality of long base portions 2 in the central region formed by the cutting device 117 on the downstream side of the cutting process are formed in parallel to the transport direction (Yd1 direction) and are orthogonal to each other (Xd1 direction). They are arranged side by side.
- the adhesive 5 is applied to the surface of one surface of the long base portion 2 formed in the cutting process (adhesive application process).
- the adhesive application unit 120 In the embodiment using the manufacturing apparatus 100, while the plurality of long base portions 2 formed in the cutting process are transported by the vacuum conveyor 141 and positioned on the vacuum box 145, the adhesive application unit 120.
- the surface of one surface (upper surface) of the plurality of long base portions 2 formed in parallel in the orthogonal direction (Xd1 direction) by the coating head 121 is intermittent except for the non-cut portion NTb.
- Adhesive 5 is applied to.
- water-absorbing polymer particles 3 are dispersed on the adhesive 5 applied to the surface of one surface (upper surface) of the plurality of long base portions 2 formed in the adhesive application step (water absorption). Particle dispersion step of the conductive polymer).
- the water-absorbing polymer particles 3 are dispersed except for the non-cut portion NTb.
- a plurality of absorbent units 4 in which the water-absorbing polymer particles 3 are fixed to the surface of the elongated base portion 2 via the adhesive 5 are formed.
- the water-absorbing polymer particles 3 are fixed to the surfaces of the both sides (upper and lower surfaces) of each long base portion 2, for example, using the manufacturing apparatus 100 shown in FIG. After fixing the water-absorbing polymer particles 3 on the surface of one surface (upper surface) of the scale-shaped substrate portion 2, the water-absorbing polymer particles 3 are reversed through a reversing roll, and then each of the long water-absorbing polymer spraying portions 130 is used. It can be produced by dispersing and fixing the water-absorbing polymer particles 3 on the surface of the other surface (lower surface) of the scale-shaped substrate portion 2.
- the precursor 1b of the sheet-like material 1 is formed.
- the plurality of absorbent units 4 formed in the central region are arranged so that each longitudinal direction (y1 direction) faces the transport direction (Yd1 direction).
- the plurality of absorptive units 4 formed in each side region are arranged so that the respective longitudinal directions (y1 direction) are directed in the orthogonal direction (Xd1 direction).
- the precursor 1b of the sheet-like material 1 is conveyed to the downstream side by the drive roll 152, and the length of the non-cut portion NTb in the conveyance direction (Yd1 direction) is determined by using a known cutting device (not shown). It cut
- the sheet-like object 1 can be manufactured stably and efficiently.
- the disposable diaper 10 which is one embodiment of the present invention is a known manufacturing method of a so-called cross-flow type pants-type disposable diaper, except that the sheet-like material 1 manufactured using the manufacturing apparatus 100 is used for the absorbent core 24. It can be manufactured in the same manner. For example, while the sheet-like material 1 is continuously conveyed in the flow direction (longitudinal flow) in the length direction, the whole is covered with a strip-shaped core wrap sheet 25, and the sheet-like material 1 is intermittent in the flow direction. The continuum of the absorbers 23 arranged in is formed.
- the top sheet member formed by fixing the folded sheet material 27 in which the continuous thread-like elastic members 29a, 29b, and 29c are arranged on both sides of the belt-like topsheet 21 The upper surface of the continuous body of 23 is covered, and the lower surface of the continuous body of absorbent body 23 is covered with a belt-like back sheet 22. Thereafter, both side portions along the flow direction (longitudinal flow) of the top sheet member are rolled down to the lower surface side of the continuous body of the absorber 23, and these constituent members are fixed, and the sheet is adjacent to the flow direction (longitudinal flow).
- the absorbent body 20 is continuously manufactured in the flow direction (longitudinal flow) by dividing the gap between the objects 1.
- each absorbent main body 20 is rotated by 90 degrees, fixed on the inner layer sheet 31 of the strip-shaped outer package 30 manufactured in a separate process via an adhesive such as a hot melt adhesive, and the continuous diaper 1 Form the body.
- a leg hole is formed inside the annular portion surrounded by the leg elastic member 33L in the continuous body of the exterior body 30 in which the absorbent main body 20 is disposed.
- the outer body 30 is overlapped so that both sides in the flow direction of the continuous body overlap, and the continuous body of the outer body 30 and the absorbent main body 20 are folded in two.
- the side seal part S is formed intermittently, and then the side seal part S is cut to manufacture the diaper 1 continuously.
- the present invention is not limited to the above embodiment and can be modified as appropriate.
- the sheet-like material 1 that is the absorbent core 24 of the diaper 10 described above is a long base portion having a uniform width in both the central region CT and each side region ST.
- the width of the elongated base portion 2 may be non-uniform.
- the water-absorbing polymer particles 3 are unevenly distributed and fixed, and the portion having a relatively large basis weight of the fixed water-absorbing polymer 3 has a long shape.
- the distance between the side edge portions 2s and 2s along the longitudinal direction (y1 direction) of the base portion 2 may be relatively short.
- the portion between the side edges 2s, 2s of the long base portion 2 in the portion with a large basis weight of the fixed water-absorbing polymer 3 This distance may be shorter than the distance between the side edges 2s, 2s of the long base portion 2 in the portion where the basis weight of the fixed water-absorbing polymer 3 is small. If it is the sheet-like thing 1 which has the above structure, in the part with many basic weights of the fixed water-absorbing polymer 3, the adjacent absorptive units 4 and 4 are free in the thickness direction (Z direction, z1 direction). It is easy to move, the sheet-like material 1 is hard to become hard, and since the absorption performance of the water-absorbing polymer 3 can be maximized, the absorption performance of the sheet-like material 1 is easily improved.
- the sheet-like article 1 of the diaper 10 shown in FIG. 17 described above is such that the longitudinal direction (y1 direction) of each of the plurality of absorbent units 4 faces the article longitudinal direction Y of the sheet-like article 1 in the central region CT.
- the plurality of absorbent units 4 may be arranged so that the longitudinal direction (y1 direction) of each of the plurality of absorbent units 4 faces the article lateral direction X of the sheet 1.
- each absorbent unit 4 and each long base portion 2 extend linearly in parallel with the article lateral direction X.
- each absorptive unit 4 and each elongate base portion 2 may extend by repeating an S shape in the article lateral direction X, or may extend in a jagged shape in the article lateral direction X.
- the absorbent main body 20 has a pair of leak-proof cuffs 26 and 26 on both side portions along the longitudinal direction Y of the article.
- the article may not have a pair of leak-proof cuffs 26, 26.
- the constituent members of the absorbent article on the non-skin facing surface side to which the tip 21E1 of the extension part 21E of the top sheet 21 is fixed are the back sheet 22, Alternatively, the inner layer sheet 31 constituting the outer package 30 is formed.
- an adhesive application process is provided in the post-process of the cutting process, and a water-absorbing polymer spraying process is provided in the post-process of the adhesive application process.
- a raising process step may be provided instead of the adhesive application step. What is necessary is just to prepare such a raising process process in the front process of a cutting process. Examples of the raising method include a method described in JP2012-092476A, a method described in JP2013-028891A, and the like.
- the absorbent article of the present invention may be anything that can be used for absorbing and holding excretory body fluids such as urine and menstrual blood, in addition to the disposable diaper 1 described above.
- Absorbent articles include, for example, unfoldable disposable diapers, sanitary napkins, incontinence pads, etc., but are not limited to these, and a wide range of articles used to absorb liquid discharged from the human body. It is included.
- a long base portion having a horizontal direction, a longitudinal direction longer than the horizontal direction, and a thickness direction, and particles of a water-absorbing polymer fixed to the surface of one surface of the long base portion
- the water-absorbing polymer particles absorb the liquid
- the water-absorbing polymer particles swell beyond the side edges along the longitudinal direction of the elongated substrate portion, and the position of the elongated substrate portion is However, in the said thickness direction, the sheet-like thing made
- ⁇ 2> The sheet-like material according to ⁇ 1>, wherein the water-absorbing polymer particles are arranged in the vicinity of the side edge portion of the elongated base portion before the water-absorbing polymer particles absorb the liquid.
- the water-absorbing polymer particles protrude beyond the side edge of the elongated base portion, according to ⁇ 1> or ⁇ 2>.
- Sheet material. ⁇ 4> The sheet-like material according to any one of the above items ⁇ 1> to ⁇ 3>, wherein the adjacent elongated base portions are at least partially adjacent to each other before the water-absorbing polymer particles absorb the liquid. . ⁇ 5> Before the water-absorbing polymer particles absorb the liquid, the adjacent elongated base portions are adjacent to each other over the entire sheet shape according to any one of ⁇ 1> to ⁇ 4>. object.
- ⁇ 6> The sheet-like material according to any one of the above items ⁇ 1> to ⁇ 5>, wherein the sheet-like material includes a non-slit region in which a plurality of the elongated base portions are connected in the horizontal direction at both ends in the vertical direction. Sheet-like material. ⁇ 7> The sheet-like material includes a non-slit region in which a plurality of the elongated base portions are connected in the lateral direction at both ends in the vertical direction, and the water-absorbing polymer particles are present in the non-slit region.
- the sheet-like material according to any one of ⁇ 1> to ⁇ 6> which is not fixed.
- ⁇ 8> The sheet-like material according to any one of ⁇ 1> to ⁇ 7>, wherein both ends in the longitudinal direction are fixed to the absorbent article.
- a distance between both side edges along the longitudinal direction is larger than an average particle diameter in a state before the water-absorbing polymer particles absorb the liquid, and the water-absorbing polymer particles are The sheet-like material according to any one of the above items ⁇ 1> to ⁇ 8>, which is smaller than an average particle size in a swollen state after absorbing the liquid.
- ⁇ 10> The sheet-like material according to any one of ⁇ 1> to ⁇ 9>, wherein the long base portion is hydrophilic.
- ⁇ 11> The sheet-like material according to any one of ⁇ 1> to ⁇ 10>, wherein the long base portion is a nonwoven fabric.
- ⁇ 12> When the sheet-like material is viewed in plan, the water-absorbing polymer particles are unevenly distributed and fixed, and the long base is in a portion where the basis weight of the fixed water-absorbing polymer particles is relatively large.
- ⁇ 13> Any of ⁇ 1> to ⁇ 12>, wherein the water-absorbing polymer particles are fixed to the surface of the other surface of the elongated base portion before the water-absorbing polymer particles absorb the liquid.
- the sheet-like material according to 1. ⁇ 14> The basis weight of the water-absorbing polymer particles fixed to the surface of the other surface of the elongated base portion is the same as that of the water-absorbing polymer fixed to the surface of one surface of the elongated base portion.
- the sheet-like material according to ⁇ 13> which is larger than the basis weight of the particles.
- the water-absorbing polymer particles fixed to the surface of one surface of the elongated base portion are compared to the water-absorbing polymer particles fixed to the surface of the other surface of the long base portion,
- the sheet-like material according to ⁇ 13> or ⁇ 14> wherein the liquid passing performance under pressure is high and the centrifugal retention amount is low.
- ⁇ 16> The sheet-like material according to any one of ⁇ 1> to ⁇ 15>, wherein the water-absorbing polymer particles are fixed to the elongate base portion through an adhesive.
- ⁇ 17> The sheet-like material according to any one of ⁇ 1> to ⁇ 16>, wherein inclusions are not present between the absorbent units adjacent in the lateral direction.
- ⁇ 18> The sheet-like article according to any one of ⁇ 1> to ⁇ 17>, wherein a plurality of the absorptive units are arranged so that a longitudinal direction thereof faces a longitudinal direction of the sheet-like article.
- ⁇ 19> 3 or more, preferably 50 or more, are arranged per sheet-like material, and 1000 or less, preferably 500 or less, and more specifically 3 absorbent units are arranged.
- a plurality of the absorptive units are arranged such that the longitudinal direction thereof faces the lateral direction of the sheet-like material,
- the number of the absorbent units is 3 or more, preferably 50 or more, and 3500 or less, preferably 2000 or less, and specifically 3 or less per sheet.
- ⁇ 21> The sheet according to any one of ⁇ 1> to ⁇ 20>, wherein the absorbent unit has a lateral length of 0.5 mm to 10 mm, preferably 1 mm to 5 mm.
- a sheet-like material according to any one of the above. ⁇ 23> The sheet-like article according to ⁇ 22>, wherein the length of the absorbent unit in the vertical direction is 10 mm to 500 mm, preferably 200 mm to 400 mm.
- the ratio of the width of the long base portion to the width of the sheet-like material is 0.001 or more, preferably 0.002 or more, and is 0.2 or less, preferably 0.04 or less.
- the sheet-like material according to any one of ⁇ 1> to ⁇ 23>, which is 0.001 or more and 0.2 or less, preferably 0.002 or more and 0.04 or less.
- the width of the long base portion is 0.3 mm or more, preferably 0.6 mm or more, and 10 mm or less, preferably 2 mm or less, more preferably 1.8 mm or less.
- the sheet-like material according to any one of ⁇ 1> to ⁇ 24> which is 3 mm to 10 mm, preferably 0.6 mm to 2 mm, more preferably 0.6 mm to 1.8 mm.
- a long base portion is further disposed on the water-absorbing polymer particles, and the water-absorbing polymer particles are sandwiched and fixed between the two upper and lower long base portions.
- a substrate sheet wider than the elongated substrate portion is further disposed on the water-absorbing polymer particles, and the water-absorbing polymer particles are sandwiched between the elongated substrate portion and the substrate sheet.
- the sheet-like material according to any one of ⁇ 1> to ⁇ 25> which is fixed.
- An absorbent body for absorbent articles comprising the sheet-like material according to any one of ⁇ 1> to ⁇ 27>, and a liquid-permeable core wrap sheet that covers the sheet-like material.
- the absorbent article which has an absorber as described in said ⁇ 28>, the surface sheet distribute
- a long base portion having a horizontal direction, a longitudinal direction longer than the horizontal direction, and a thickness direction, and particles of a water-absorbing polymer fixed to the surface of one surface of the long base portion
- a plurality of absorptive units provided with each of the absorptive units, the absorptive units being arranged so that the longitudinal direction thereof faces at least one direction
- the water-absorbing polymer particles absorb the liquid
- the water-absorbing polymer particles swell beyond the side edges along the longitudinal direction of the elongated substrate portion, and the position of the elongated substrate portion is However, in the thickness direction, it is a method for producing a sheet-like article for absorbent articles that is different from the position before absorbing the liquid
- a method for producing a sheet-like product comprising a step of dispersing
- the method for producing a sheet-like material according to ⁇ 30> further including an adhesive application step of applying an adhesive in a step prior to the particle spraying step of the water-absorbing polymer.
- the adhesive coating step is provided in the subsequent step of the cutting step
- the particle absorbing step of the water-absorbing polymer is provided in the subsequent step of the adhesive coating step
- the adhesive is applied to the surface of one surface of the long base portion formed in the cutting step and applied to the surface of one surface of the long base portion.
- the water-absorbing polymer particles are dispersed on the adhesive, and the water-absorbing polymer particles are fixed to the elongated substrate portion via the adhesive.
- the strip-shaped base sheet is cut along the transport direction of the base sheet, and a plurality of long base portions are formed by cutting at a plurality of positions in the orthogonal direction.
- a non-cut portion that is intermittently arranged in the transport direction of the base sheet is formed on the belt-shaped base sheet
- a non-cut portion that is intermittently arranged in the transport direction of the base sheet is formed on the belt-shaped base sheet, The method for producing a sheet-like product according to any one of ⁇ 30> to ⁇ 35>, wherein the water-absorbing polymer particles are dispersed except for the non-cut portion.
- ⁇ 37> The method for producing a sheet-like material according to any one of ⁇ 30> to ⁇ 35>, wherein an adhesive is applied to the dispersed water-absorbing polymer particles after the water-absorbing polymer spraying step.
- the base sheet is cut to form a plurality of the elongated base portions, Applying an adhesive to the surface of one side of all the plurality of the elongated base parts formed, In the plurality of long base portions, the base sheet is applied to the surface of one surface of the plurality of long base portions located on one side from the position of the bisect in the orthogonal direction.
- the water-absorbing polymer particles are sprayed only on the adhesive, and the water-absorbing polymer particles are fixed to the elongate base through the adhesive, and then on the other side of the bisecting position.
- a plurality of long base portions, each having a surface coated with the adhesive, are folded back onto the water-absorbing polymer particles, and the water-absorbing polymer particles are formed on the long base portions.
- the base sheet is cut to form a plurality of the elongated base portions, Applying an adhesive to the surface of one surface of the long base portion, The particles of the water-absorbing polymer are sprayed on the surface of the elongated substrate portion to which the adhesive has been applied on the surface to which the adhesive has been applied, A further adhesive is applied on the dispersed particles of the water-absorbing polymer, A second long base portion obtained by cutting a second base sheet is disposed on the adhesive applied on the water-absorbing polymer particles, and the long base portion is provided.
- the method for producing a sheet-like material according to any one of ⁇ 30> to ⁇ 37>, wherein a sheet-like material is obtained in which the water-absorbing polymer particles are sandwiched between the second elongated base portions.
- the base sheet is cut to form a plurality of the elongated base portions, Applying an adhesive to the surface of one surface of the long base portion, The particles of the water-absorbing polymer are dispersed on the surface of the surface of the elongated substrate portion to which the adhesive has been applied.
- a further adhesive is applied on the dispersed particles of the water-absorbing polymer,
- a second base sheet wider than the long base portion is disposed on the adhesive applied on the water-absorbing polymer particles, and the long base portion and the second base portion are arranged.
- An article main body comprising the top sheet, the back sheet, and an absorbent main body including the absorbent body interposed between the two sheets, the article longitudinal direction corresponding to the wearer's front-rear direction and the article transverse direction perpendicular to the article longitudinal direction
- An absorbent article having a direction, wherein the absorbent body has a lateral direction, a longitudinal direction having a longer length than the lateral direction, and a longitudinal direction having a thickness direction, and the elongated base part.
- a plurality of the absorptive units comprising particles of the water-absorbing polymer fixed to the surface of one surface of each of the absorptive units, and each of the absorptive units is arranged so that the longitudinal direction thereof faces at least one direction.
- Each of the side regions The absorbent units are arranged such that the longitudinal direction thereof is oriented in the lateral direction of the article, and the top sheet covers the skin-facing surface of the absorbent body, from both side edges of the absorbent body.
- ⁇ 43> The distance between the side edges along the longitudinal direction of the elongated base portion of the absorbent unit disposed in each side region of the absorbent core, and the center region of the absorbent core
- ⁇ 44> In the central region of the absorbent core, the absorbent units according to any one of ⁇ 41> to ⁇ 43>, wherein the absorbent units are arranged so that a longitudinal direction thereof is directed to an article longitudinal direction. Goods.
- the basis weight of the water absorbent polymer of the absorbent unit disposed in the central region of the absorbent core is the water absorbent polymer of the absorbent unit disposed in each side region of the absorbent core.
- ⁇ 46> The position where the tip of the extension part of the surface sheet and the constituent member of the absorbent article are joined coincides with the position corresponding to the boundary between the central region and the side regions of the absorbent core.
- ⁇ 47> The absorbent core, in a state after swelling, the particles of the water-absorbing polymer swell beyond the side edge along the longitudinal direction of the elongated base portion, and The absorbent article according to any one of ⁇ 41> to ⁇ 46>, wherein the positions of the water-absorbing polymer particles are different from the positions before absorbing the liquid in the thickness direction.
- the absorbent unit is arranged in the central region of the absorbent core, and the absorbent core is not fixed to the absorbent article in a portion where the absorbent unit is arranged in the central region.
- the absorbent article according to any one of ⁇ 41> to ⁇ 47> The absorbent article according to any one of ⁇ 41> to ⁇ 47>.
- ⁇ 49> The absorbent article according to any one of ⁇ 41> to ⁇ 48>, wherein both ends in the longitudinal direction of the absorbent core are fixed to the absorbent article.
- ⁇ 50> The absorbent article according to any one of ⁇ 41> to ⁇ 49>, wherein both sides of the absorbent core along the longitudinal direction are fixed to the absorbent article.
- ⁇ 51> The absorbent core according to any one of ⁇ 41> to ⁇ 50>, wherein the water-absorbing polymer particles are not fixed to both ends in the longitudinal direction or both sides along the longitudinal direction.
- Absorbent article. ⁇ 52> The absorbent article according to any one of ⁇ 41> to ⁇ 51>, wherein the absorbent core is hydrophilic in the elongated base portion.
- the absorbent core includes a kind of the water-absorbing polymer fixed to the surface of one surface of the long base portion and the water-absorbing polymer fixed to the surface of the other surface of the long base portion.
- the side region is any one of ⁇ 41> to ⁇ 53>, in which each of the absorbent units is arranged in parallel with the article lateral direction X so that the plurality of absorbent units do not intersect each other.
- the side region uses a plurality of the absorptive units having the elongated base portion having a uniform width, and the longitudinal direction (y1 direction) of the absorptive units is oriented in the lateral direction of the sheet-like article.
- the absorbent article according to any one of the above items ⁇ 41> to ⁇ 54>, wherein the absorbent article is arranged in parallel with the article in the transverse direction of the sheet and juxtaposed in the article longitudinal direction.
- the central region is formed by arranging a plurality of the absorptive units so that the longitudinal direction (y1 direction) of the absorptive units is directed to the longitudinal direction of the article of the sheet-like article, and more preferably The absorbent article according to any one of ⁇ 41> to ⁇ 56>, wherein the absorbent units are arranged in parallel to the article longitudinal direction Y so that the absorbent units of the book do not cross each other.
- ⁇ 58> In the central region, inclusions are not present between the absorbent units adjacent in the lateral direction (x1 direction) of the elongated base portion, and any one of ⁇ 41> to ⁇ 57> Or an absorbent article according to claim 1.
- the sheet-like material has an absorption region in which a plurality of the absorptive units are arranged so as to face one direction in a state before use,
- the ratio of the absorption region to the whole sheet is preferably 20% or more, more preferably 50% or more, and preferably 100% or less, and 90% or less. More preferably, the absorbent article according to any one of the above items ⁇ 41> to ⁇ 58>.
- ⁇ 60> In the side region, when the absorbent unit is arranged so that the longitudinal direction (y1 direction) of the absorbent unit faces the article lateral direction X, 10 or more absorbent units may be arranged in each of the side regions.
- the width (length in the lateral direction (x1 direction)) of the one long base portion arranged in each side region is the width of the one long base portion arranged in the central region.
- the width of the elongated base portion in the central region is preferably 0.3 mm or more, more preferably 0.6 mm or more, and preferably 10 mm or less, and 2 mm or less. More preferably, the absorbent article according to any one of the above items ⁇ 41> to ⁇ 63>.
- the ratio of the length (length in the longitudinal direction (y1 direction)) of one long base portion 2 to the length of the sheet-like material 1 is 2% or more. Any one of the above ⁇ 41> to ⁇ 64>, preferably 20% or more, more preferably 100% or less, and still more preferably 98% or less.
- the length of the elongated base portion in the central region is preferably 20 mm or more, more preferably 200 mm or more, and preferably 1000 mm or less, and more preferably 980 mm or less.
- the length of the elongated base portion in each of the side regions is preferably 5 mm or more, more preferably 10 mm or more, and preferably 140 mm or less, and further preferably 120 mm or less.
- the width of the elongated base portion in each of the side regions is preferably 0.3 mm or more, more preferably 0.6 mm or more, and preferably 10 mm or less, and 2 mm or less. More preferably, the absorbent article according to any one of the above items ⁇ 41> to ⁇ 69>.
- the basis weight of the water-absorbing polymer fixed to the surface of one surface of the long base portion is preferably 10 g / m 2 or more and 250 g / m 2 or less, and the basis weight of the other surface of the long base portion is The absorbent article according to any one of ⁇ 41> to ⁇ 70>, wherein the basis weight of the water-absorbing polymer 3 to be fixed to the surface is preferably 30 g / m 2 or more and 400 g / m 2 or less.
- the liquid passing rate under pressure at 2.0 kPa is preferably 20 ml / min or more, and preferably 40 ml / min or more.
- the absorbent article according to any one of the above items ⁇ 41> to ⁇ 71> wherein is preferably 1000 ml / min or less, and more preferably 800 ml / min or less.
- the liquid passing rate under pressure at 2.0 kPa is preferably 0 ml / min or more, and preferably 10 ml / min or more.
- the centrifugal retention amount (water absorption amount) is preferably 20 g / g or more, and more preferably 25 g / g or more.
- the centrifugal retention amount (water absorption amount) is preferably 25 g / g or more, and more preferably 30 g / g or more.
- the absorbent article according to any one of ⁇ 41> to ⁇ 74> which is preferably 65 g / g or less, and more preferably 55 g / g or less.
- the basis weight of the water-absorbing polymer of the absorbent unit disposed in the central region of the sheet-like material that is the absorbent core is more Any one of the above ⁇ 41> to ⁇ 75>, which is larger than the basis weight of the water-absorbing polymer of the absorbent unit arranged in each side region of the sheet-like material that is the absorbent core.
- the basis weight of the water-absorbing polymer of the absorbent unit arranged in the central region is preferably 30 g / m 2 or more and 400 g / m 2 or less, and 50 g / m 2 or more and 300 g / m 2 or less per side. More preferably, the absorbent article according to any one of the above items ⁇ 41> to ⁇ 76>.
- the basis weight of the water-absorbing polymer of the absorbent unit arranged in each of the side regions is preferably 10 g / m 2 or more and 250 g / m 2 or less, and 30 g / m 2 or more and 150 g / m 2 or less per side.
- the absorbent article according to any one of ⁇ 41> to ⁇ 77>, more preferably ⁇ 79> The distance between the side edges along the longitudinal direction (y1 direction) of the elongated base portion is larger than the average particle diameter of the water-absorbing polymer particles before use (before swelling),
- the average particle size of the water-absorbing polymer particles before use (before swelling) is preferably 20 ⁇ m or more, more preferably 200 ⁇ m or more, and preferably 700 ⁇ m or less, and 500 ⁇ m or less.
- the average particle diameter of the water-absorbing polymer after swelling is preferably 200 ⁇ m or more, more preferably 800 ⁇ m or more, and preferably 3000 ⁇ m or less, and more preferably 2000 ⁇ m or less.
- a sheet-like material that hardly causes swelling inhibition and can maximize the absorption performance of the water-absorbing polymer. Moreover, according to this invention, the manufacturing method of the sheet-like material which can manufacture such a sheet-like material efficiently is provided.
- the present invention it is possible to provide an absorbent article in which the side portion of the absorbent body easily rises, the crotch fit and leakage prevention performance are improved, and the raised side portion of the absorbent body hardly gives a sense of incongruity.
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Abstract
Description
本発明のシート状物は、吸収性物品に用いられるものである。吸収性物品は、一般的に、尿や経血等の排泄体液を吸収保持するために用いられるものである。吸収性物品には、例えば、使い捨ておむつ、生理用ナプキン、失禁パッド等が包含されるが、これらに限定されるものではなく、人体から排出される液の吸収に用いられる物品を広く包含するものである。
使用前の状態において、長尺状基体部2の幅W2に対しての吸収性ユニット4の横方向(X方向)の長さLxの大小関係は、好ましくは0μm<(Lx-W2)<1400μmであり、更に好ましくは200μm<(Lx-W2)<1000μmである。
好適には、長尺状基体部2の幅(W2)は、同様の観点から、0.3mm以上であることが好ましく、0.6mm以上であることが更に好ましく、そして、10mm以下であることが好ましく、2mm以下であることがより好ましく、1.8mm以下であることが更に好ましく、具体的には、0.3mm以上10mm以下であることが好ましく、0.6mm以上2mm以下であることがより好ましく、0.6mm以上1.8mm以下であることが更に好ましい。
使用前の状態における平均粒子径は、使用前の吸水性ポリマーの粒子を用い、吸水性ポリマーの粒子の直径もしくは長軸を光学顕微鏡観察で測定できる。ここで言う直径とは、吸水性ポリマーの粒子が球状の場合を指す。また、長軸とは、吸水性ポリマーの粒子がひし形、長方形、房状、フットボール型などの異型状の場合を指す。計50個の吸水性ポリマーの粒子の直径もしくは長軸を測定し、その数平均粒子径を使用前の状態の吸水性ポリマーの粒子の平均粒子径とする。
膨潤後の状態における平均粒子径は、シート状物1を25℃に調温した生理食塩水(0.9質量%塩化ナトリウム水溶液)中に浸漬させ、浸漬開始から1時間後にシート状物1を生理食塩水から取り出し、30分間垂直状態に吊るして水切りした後、長尺状基体部2の表面の吸水性ポリマーの粒子の直径もしくは長軸を光学顕微鏡観察で測定できる。ここで言う直径とは、吸水性ポリマーの粒子が球状の場合を指す。また、長軸とは、吸水性ポリマーの粒子がひし形、長方形、房状、フットボール型などの異型状の場合を指す。計50個の吸水性ポリマーの粒子の直径もしくは長軸を測定し、その数平均粒子径を膨潤後の状態の吸水性ポリマーの粒子の平均粒子径とする。
本実施態様のシート状物1の製造方法は、帯状の基材シート20をカットして複数本の長尺状基体部2を形成するカット工程と、形成された複数本の前記長尺状基体部の一方の面の表面に吸水性ポリマーの粒子3を散布する吸水性ポリマーの粒子散布工程とを備えている。また、本実施態様においては、吸水性ポリマーの粒子散布工程よりも前工程に、接着剤5を塗布する接着剤塗布工程を備えている。即ち、本実施態様のシート状物1の製造方法は、カット工程の後工程に接着剤塗布工程を備え、接着剤塗布工程の後工程に吸水性ポリマーの粒子散布工程を備えている。
上述した図1、図6~図7、図9~図11に示すシート状物1においては、吸水性ポリマーの粒子3が、各長尺状基体部2の一方の面(上面)の表面にのみ固定されているが、シート状物1の液の吸収性能向上の観点から、各長尺状基体部2の一方の面(上面)の表面のみならず、他方の面(下面)の表面にも固定されていてもよい。各長尺状基体部2の両面(上下面)に吸水性ポリマーの粒子3を固定させるには、例えば、図4に示す製造装置100を用いて、各長尺状基体部2の一方の面(上面)の表面に吸水性ポリマーの粒子3を固定させた後、反転ロールを介して反転させ、その後別の吸水性ポリマー散布部130を用いて、各長尺状基体部2の他方の面(下面)の表面に吸水性ポリマーの粒子3を散布して固定させることにより製造できる。
加圧下通液速度は、特開2003-235889号公報に記載されている測定方法及び測定装置を利用して測定される。即ち、100mLのガラスビーカーに、測定試料である吸水性ポリマー0.32±0.005gを膨潤するに十分な量の生理食塩水(0.9質量%塩化ナトリウム水溶液)、例えば吸水性ポリマーの飽和吸収量の5倍以上の生理食塩水に浸して30分間放置する。別途、垂直に立てた円筒(内径25.4mm)の開口部の下端に、金網(目開き150μm、株式会社三商販売のバイオカラム焼結ステンレスフィルター30SUS)と、コック(内径2mm)付き細管(内径4mm、長さ8cm)とが備えられた濾過円筒管を用意し、コックを閉鎖した状態で該円筒管内に、膨潤した測定試料を含む前記ビーカーの内容物全てを投入する。次いで、目開きが150μmで直径が25mmである金網を先端に備えた直径2mmの円柱棒を濾過円筒管内に挿入して、該金網と測定試料とが接するようにし、更に測定試料に2.0kPaの荷重が加わるようにおもりを載せる。この状態で1分間放置した後、コックを開いて液を流し、濾過円筒管内の液面が60mLの目盛り線から40mLの目盛り線に達する(つまり20mLの液が通過する)までの時間(T1)(秒)を計測する。計測された時間T1(秒)を用い、次式から2.0kPaでの加圧下通液速度を算出する。尚、式中、T0(秒)は、濾過円筒管内に測定試料を入れないで、生理食塩水20mlが金網を通過するのに要する時間を計測した値である。
加圧下通液速度(ml/min)=20×60/(T1-T0)
測定は5回行い(n=5)、上下各1点の値を削除し、残る3点の平均値を測定値とする。また、測定は23±2℃、湿度50±5%で行い、測定の前に試料を同環境で24時間以上保存した上で測定する。加圧下通液速度の更に詳細な測定方法は、特開2003-235889号公報の段落〔0008〕及び段落〔0009〕に記載されており、また測定装置は、同公報の図1及び図2に記載されている。
遠心保持量(吸水量)の測定は、JIS K 7223(1996)に準拠して行う。ナイロン製の織布(三力製作所販売、品名:ナイロン網、規格:250メッシュ)を幅10cm、長さ40cmの長方形に切断して長手方向中央で二つ折りにし、両端をヒートシールして幅10cm(内寸9cm)、長さ20cmのナイロン袋を作製する。次いで、測定試料である吸水性ポリマー1.00gを精秤し、作製したナイロン袋の底部に均一になるように入れる。次いで、試料の入ったナイロン袋を、25℃に調温した生理食塩水(0.9質量%塩化ナトリウム水溶液)に浸漬させる。そして浸漬開始から1時間後にナイロン袋を生理食塩水から取り出し、1時間垂直状態に吊るして水切りした後、遠心脱水器(コクサン(株)製、型式H-130C特型)を用いて脱水する。脱水条件は、143G(800rpm)で10分間とする。脱水後、試料の質量を測定し、次式に従って目的とする遠心保持量(吸水量)を算出する。
遠心保持量(g/g)=(a'-b-c)/c
式中、a'は遠心脱水後の試料及びナイロン袋の総質量(g)、bはナイロン袋の吸水前(乾燥時)の質量(g)、cは試料の吸水前(乾燥時)の質量(g)を表す。
測定は5回行い(n=5)、上下各1点の値を削除し、残る3点の平均値を測定値とする。また、測定は23±2℃、湿度50±5%で行い、測定の前に試料を同環境で24時間以上保存した上で測定する。
尚、中央領域CTにおいて、仮に、吸収性ユニット4の縦方向(y1方向)を物品横方向Xに向くように配する場合、吸収性ユニット4は、中央領域CTに、10本以上配されていることが好ましく、50本以上配されていることが更に好ましく、そして、3500本以下配されていることが好ましく、1700本以下配されていることが更に好ましく、具体的には、10本以上3500本以下配されていることが好ましく、50本以上1700本以下配されていることが更に好ましい。
好適には、中央領域CTにおける長尺状基体部2の幅(W2C)は、同様の観点から、0.3mm以上であることが好ましく、0.6mm以上であることが更に好ましく、そして、10mm以下であることが好ましく、2mm以下であることが更に好ましく、具体的には、0.3mm以上10mm以下であることが好ましく、0.6mm以上2mm以下であることが更に好ましい。尚、シート状物1は、その幅(W1)が50mm以上300mm以下のものである。
好適には、中央領域CTにおける長尺状基体部2の長さ(L2C)は、同様の観点から、20mm以上であることが好ましく、200mm以上であることが更に好ましく、そして、1000mm以下であることが好ましく、980mm以下であることが更に好ましく、具体的には、20mm以上1000mm以下であることが好ましく、200mm以上980mm以下であることが更に好ましい。尚、シート状物1は、その長さ(L1)が100mm以上1000mm以下程度のものである。
好適には、各サイド領域STにおける長尺状基体部2の長さ(L2S)は、同様の観点から、5mm以上であることが好ましく、10mm以上であることが更に好ましく、そして、140mm以下であることが好ましく、120mm以下であることが更に好ましく、具体的には、5mm以上140mm以下であることが好ましく、10mm以上120mm以下であることが更に好ましい。
好適には、各サイド領域STにおける長尺状基体部2の幅(W2S)は、同様の観点から、0.3mm以上であることが好ましく、0.6mm以上であることが更に好ましく、そして、10mm以下であることが好ましく、2mm以下であることが更に好ましく、具体的には、0.3mm以上10mm以下であることが好ましく、0.6mm以上2mm以下であることが更に好ましい。
長尺状基体部2における非肌対向面側に固定されている吸水性ポリマーが脱落しないように吸水性ポリマー上面から再度接着剤等で固定しておき、肌対向面側に固定されている吸水性ポリマーを、溶剤等を用いて長尺状基体部2から剥離させ、吸水性ポリマーに付着している接着剤を洗浄する。吸水性ポリマーを乾燥させたのち、肌対向面側に固定されていた吸水性ポリマー重量を測定し、吸水性ポリマーが固定されていた部分の長尺状基体部2の面積と剥離した吸水性ポリマーの重量から、単位面積当たりに固定されていた吸水性ポリマー重量を算出し、肌対向面側の吸水性ポリマー坪量とする。測定は5枚行い平均値を算出する。
非肌対向面側の吸水性ポリマー坪量については、同様に肌対向面側の吸水性ポリマーを固定した上で、非肌対向面側の吸水性ポリマーを剥離、洗浄し、算出する。
加圧下通液速度は、特開2003-235889号公報に記載されている測定方法及び測定装置を利用して測定される。即ち、100mLのガラスビーカーに、測定試料である吸水性ポリマー0.32±0.005gを膨潤するに十分な量の生理食塩水(0.9質量%塩化ナトリウム水溶液)、例えば吸水性ポリマーの飽和吸収量の5倍以上の生理食塩水に浸して30分間放置する。別途、垂直に立てた円筒(内径25.4mm)の開口部の下端に、金網(目開き150μm、株式会社三商販売のバイオカラム焼結ステンレスフィルター30SUS)と、コック(内径2mm)付き細管(内径4mm、長さ8cm)とが備えられた濾過円筒管を用意し、コックを閉鎖した状態で該円筒管内に、膨潤した測定試料を含む前記ビーカーの内容物全てを投入する。次いで、目開きが150μmで直径が25mmである金網を先端に備えた直径2mmの円柱棒を濾過円筒管内に挿入して、該金網と測定試料とが接するようにし、更に測定試料に2.0kPaの荷重が加わるようにおもりを載せる。この状態で1分間放置した後、コックを開いて液を流し、濾過円筒管内の液面が60mLの目盛り線から40mLの目盛り線に達する(つまり20mLの液が通過する)までの時間(T1)(秒)を計測する。計測された時間T1(秒)を用い、次式から2.0kPaでの加圧下通液速度を算出する。尚、式中、T0(秒)は、濾過円筒管内に測定試料を入れないで、生理食塩水20mlが金網を通過するのに要する時間を計測した値である。
加圧下通液速度(ml/min)=20×60/(T1-T0)
測定は5回行い(n=5)、上下各1点の値を削除し、残る3点の平均値を測定値とする。また、測定は23±2℃、湿度50±5%で行い、測定の前に試料を同環境で24時間以上保存した上で測定する。加圧下通液速度の更に詳細な測定方法は、特開2003-235889号公報の段落〔0008〕及び段落〔0009〕に記載されており、また測定装置は、同公報の図15及び図16に記載されている。
遠心保持量(吸水量)の測定は、JIS K 7223(1996)に準拠して行う。ナイロン製の織布(三力製作所販売、品名:ナイロン網、規格:250メッシュ)を幅10cm、長さ40cmの長方形に切断して長手方向中央で二つ折りにし、両端をヒートシールして幅10cm(内寸9cm)、長さ20cmのナイロン袋を作製する。次いで、測定試料である吸水性ポリマー1.00gを精秤し、作製したナイロン袋の底部に均一になるように入れる。次いで、試料の入ったナイロン袋を、25℃に調温した生理食塩水(0.9質量%塩化ナトリウム水溶液)に浸漬させる。そして浸漬開始から1時間後にナイロン袋を生理食塩水から取り出し、1時間垂直状態に吊るして水切りした後、遠心脱水器(コクサン(株)製、型式H-130C特型)を用いて脱水する。脱水条件は、143G(800rpm)で10分間とする。脱水後、試料の質量を測定し、次式に従って目的とする遠心保持量(吸水量)を算出する。
遠心保持量(g/g)=(a'-b-c)/c
式中、a'は遠心脱水後の試料及びナイロン袋の総質量(g)、bはナイロン袋の吸水前(乾燥時)の質量(g)、cは試料の吸水前(乾燥時)の質量(g)を表す。
測定は5回行い(n=5)、上下各1点の値を削除し、残る3点の平均値を測定値とする。また、測定は23±2℃、湿度50±5%で行い、測定の前に試料を同環境で24時間以上保存した上で測定する。
各部の構成材料は、当該技術分野において通常用いられているものを特に制限無く用いることができる。
例えば、表面シート21としては、親水性且つ液透過性の不織布や、開孔フィルムを用いることができる。裏面シート22としては、液不透過性の材料や撥水性の材料を用いることができる。液不透過性の材料としては、樹脂フィルムや、樹脂フィルムと不織布等とのラミネート材等を用いることができ、撥水性の材料としては、撥水性不織布等を用いることができる。撥水性不織布としては、防漏カフ26を形成するシート材料27として用いる、後述する不織布を用いることができる。コアラップシート25としては、湿式抄造法により製造した薄葉紙(ティッシュペーパー)や液透過性の不織布等を用いることができる。
おむつ10は、図15及び図16に示すように、吸収体23の吸収性コア24が、吸水性ポリマー3を備えた吸収性ユニット4を複数本具備したシート状物1から形成されている。また、吸収性コア24であるシート状物1の各サイド領域STにおいて、図17に示すように、各吸収性ユニット4は、その縦方向(y1方向)が物品横方向Xを向くように配列されている。そして、表面シート21は、図20に示すように、吸収体23の肌対向面の全面を被覆し、吸収体23の両側縁部から物品横方向X外方に延出した延出部位21Eを有しており、該延出部位21Eが、吸収体23の非肌対向面側に折り返されて、吸収性コア24の各サイド領域STに位置する吸収体23の非肌対向面を被覆して、延出部位21Eの先端部21E1が、隣接する吸収性物品の構成部材に接合部28にて固定されている。このように、各吸収性ユニット4が、その縦方向(y1方向)が物品横方向Xを向くように配列されているとともに、表面シート2が各吸収性ユニット4の配列されたシート状物1の各サイド領域STを包むように配されているので、図21に示すように、着用時に各サイド領域STに対応する吸収体23のサイド部分の吸収体が立ち上がり易く、股下部Cのフィット性及び防漏性能が向上し、また、着用中に着用者に違和感を与え難くなっている。
使用前の状態における平均粒子径d1は、使用前の吸水性ポリマーの粒子を用い、吸水性ポリマーの粒子の直径もしくは長軸を光学顕微鏡観察で測定した。ここで直径とは、吸水性ポリマーの粒子が球状の場合を指す。また、長軸とは、吸水性ポリマーの粒子がひし形、長方形、房状、フットボール型などの異型状の場合を指す。計50個の吸水性ポリマーの粒子の直径もしくは長軸を測定し、その数平均粒子径を使用前の状態の吸水性ポリマーの粒子の平均粒子径d1とする。
膨潤後の状態における平均粒子径d2は、シート状物1を25℃に調温した生理食塩水(0.9質量%塩化ナトリウム水溶液)中に浸漬させ、浸漬開始から1時間後にシート状物1を生理食塩水から取り出し、30分間垂直状態に吊るして水切りした後、長尺状基体部2の表面の吸水性ポリマーの粒子の直径もしくは長軸を光学顕微鏡観察で測定した。ここで言う直径とは、吸水性ポリマーの粒子が球状の場合を指す。また、長軸とは、吸水性ポリマーの粒子がひし形、長方形、房状、フットボール型などの異型状の場合を指す。計50個の吸水性ポリマーの粒子の直径もしくは長軸を測定し、その数平均粒子径を膨潤後の状態の吸水性ポリマーの粒子の平均粒子径として測定できる。
製造装置100を用いるシート状物1の製造方法は、帯状の基材シート2bをカットして複数本の長尺状基体部2を形成するカット工程、該カット工程の後工程に、吸水性ポリマーの粒子3を散布する吸水性ポリマーの粒子散布工程を備えている。また、本実施態様においては、吸水性ポリマーの粒子散布工程よりも前工程に、接着剤5を塗布する接着剤塗布工程を備えている。即ち、製造装置100を用いるシート状物1の製造方法は、カット工程の後工程に接着剤塗布工程を備え、接着剤塗布工程の後工程に吸水性ポリマーの粒子散布工程を備えている。
上述したおむつ10の有する吸収性コア24であるシート状物1は、図16及び図17に示すように、中央領域CT及び各サイド領域STの何れにおいても、均一な幅の長尺状基体部2を有する吸収性ユニット4を複数本用いて形成されているが、長尺状基体部2の幅は不均一であってもよい。好適には、シート状物1を平面視して、吸水性ポリマーの粒子3が偏在して固定されており、固定された吸水性ポリマー3の坪量が相対的に多い部分において、長尺状基体部2の縦方向(y1方向)に沿う両側縁部2s,2s間の距離が相対的に短くなっていてもよい。即ち、固定された吸水性ポリマー3の坪量が多い部分と少ない部分を比べて、固定された吸水性ポリマー3の坪量が多い部分における長尺状基体部2の両側縁部2s,2s間の距離が、固定された吸水性ポリマー3の坪量が少ない部分における長尺状基体部2の両側縁部2s,2s間の距離よりも短く形成されていてもよい。以上の構成を有するシート状物1であれば、固定された吸水性ポリマー3の坪量が多い部分において、隣り合う吸収性ユニット4,4どうしが厚み方向(Z方向,z1方向)に自由に動き易く、シート状物1が硬くなり難く、また、吸水性ポリマー3の吸収性能を最大限に発揮できるので、シート状物1の吸収性能が向上し易い。
横方向と、該横方向よりも長さの長い縦方向と、厚み方向とを有する長尺状基体部、及び該長尺状基体部の一方の面の表面に固定された吸水性ポリマーの粒子を備えた吸収性ユニットを複数本具備し、各該吸収性ユニットを、その縦方向が少なくとも一方向を向くように配列させてなる吸収性物品用のシート状物であって、
前記吸水性ポリマーの粒子が液を吸収すると、該吸水性ポリマーの粒子が、前記長尺状基体部の前記縦方向に沿う側縁部を越えて膨潤し、且つ該長尺状基体部の位置が、前記厚み方向において、液を吸収する前の位置と異なるようになされているシート状物。
前記吸水性ポリマーの粒子が液を吸収する前に、前記吸水性ポリマーの粒子が、前記長尺状基体部の前記側縁部近傍に配されている前記<1>に記載のシート状物。
<3>
前記吸水性ポリマーの粒子が液を吸収する前に、前記吸水性ポリマーの粒子が、前記長尺状基体部の前記側縁部を越えてはみ出している前記<1>又は<2>に記載のシート状物。
<4>
前記吸水性ポリマーの粒子が液を吸収する前に、隣り合う前記長尺状基体部どうしは、少なくとも一部隣接している前記<1>~<3>の何れか1に記載のシート状物。
<5>
前記吸水性ポリマーの粒子が液を吸収する前に、隣り合う前記長尺状基体部どうしは、全体に亘って隣接している前記<1>~<4>の何れか1に記載のシート状物。
前記シート状物は、前記縦方向の両端部に、複数の前記長尺状基体部が前記横方向に繋がった非スリット領域を備えている前記<1>~<5>の何れか1に記載のシート状物。
<7>
前記シート状物は、前記縦方向の両端部に、複数の前記長尺状基体部が前記横方向に繋がった非スリット領域を備えており、該非スリット領域には、前記吸水性ポリマーの粒子が固定されていない前記<1>~<6>の何れか1に記載のシート状物。
<8>
前記シート状物は、前記縦方向の両端部が、前記吸収性物品に固定されている前記<1>~<7>の何れか1に記載のシート状物。
<9>
前記長尺状基体部は、前記縦方向に沿う両側縁部間の距離が、前記吸水性ポリマーの粒子が液を吸収する前の状態の平均粒子径よりも大きく、前記吸水性ポリマーの粒子が液を吸収して膨潤した状態の平均粒子径よりも小さい前記<1>~<8>の何れか1に記載のシート状物。
<10>
前記長尺状基体部は、親水性である前記<1>~<9>の何れか1に記載のシート状物。
前記長尺状基体部は、不織布である前記<1>~<10>の何れか1に記載のシート状物。
<12>
前記シート状物を平面視して、前記吸水性ポリマーの粒子が偏在して固定されており、固定された該吸水性ポリマーの粒子の坪量が相対的に多い部分において、前記長尺状基体部の縦方向に沿う両側縁部間の距離が相対的に短い前記<1>~<11>の何れか1に記載のシート状物。
<13>
前記吸水性ポリマーの粒子が液を吸収する前に、前記吸水性ポリマーの粒子は、前記長尺状基体部の他方の面の表面に固定されている前記<1>~<12>の何れか1に記載のシート状物。
<14>
前記長尺状基体部の他方の面の表面に固定された前記吸水性ポリマーの粒子の坪量の方が、該長尺状基体部の一方の面の表面に固定された該吸水性ポリマーの粒子の坪量よりも大きい前記<13>に記載のシート状物。
<15>
前記長尺状基体部の一方の面の表面に固定された前記吸水性ポリマーの粒子は、該長尺状基体部の他方の面の表面に固定された該吸水性ポリマーの粒子に比べて、加圧下通液性能が高く、遠心保持量が低い前記<13>又は<14>に記載のシート状物。
前記吸水性ポリマーの粒子は、接着剤を介して前記長尺状基体部に固定されている前記<1>~<15>の何れか1に記載のシート状物。
<17>
前記横方向において隣り合う前記吸収性ユニット間においては、介在物が非存在状態となっている前記<1>~<16>の何れか1に記載のシート状物。
<18>
前記吸収性ユニットは、その縦方向が前記シート状物の縦方向を向くように複数本配列されている前記<1>~<17>の何れか1に記載のシート状物。
<19>
前記吸収性ユニットは、シート状物1枚当たり、3本以上、好ましくは50本以上配されており、そして、1000本以下、好ましくは500本以下配されており、具体的には、3本以上1000本以下、好ましくは50本以上500本以下配されている前記<18>に記載のシート状物。
<20>
前記吸収性ユニットは、その縦方向が前記シート状物の横方向を向くように複数本配列されており、
前記吸収性ユニットは、前記シート状物1枚当たり、3本以上、好ましくは50本以上配されており、そして、3500本以下、好ましくは2000本以下配されており、具体的には、3本以上3500本以下、好ましくは50本以上2000本以下配されている前記<1>~<17>の何れか1に記載のシート状物。
前記吸収性ユニットは、横方向の長さが、0.5mm以上10mm以下、好ましくは1mm以上5mm以である前記<1>~<20>の何れか1に記載のシート状物。
<22>
前記吸収性ユニットの縦方向の長さは、該吸収性ユニットの横方向の長さに対して、20倍以上200倍以下、好ましくは40倍以上80倍である前記<1>~<21>の何れか1に記載のシート状物。
<23>
前記吸収性ユニットの縦方向の長さは、10mm以上500mm以下、好ましくは200mm以上400mm以下である前記<22>に記載のシート状物。
<24>
前記シート状物の幅に対する前記長尺状基体部の幅の割合は、0.001以上、好ましくは0.002以上であり、そして、0.2以下、好ましくは0.04以下であり、具体的には、0.001以上0.2以下、好ましくは0.002以上0.04以下である前記<1>~<23>の何れか1に記載のシート状物。
<25>
前記長尺状基体部の幅は、0.3mm以上、好ましくは0.6mm以上であり、そして、10mm以下、好ましくは2mm以下、より好ましくは1.8mm以下であり、具体的には、0.3mm以上10mm以下、好ましくは0.6mm以上2mm以下、より好ましくは0.6mm以上1.8mm以下である前記<1>~<24>の何れか1に記載のシート状物。
<26>
前記吸水性ポリマーの粒子の上に、更に長尺状基体部が配されており、該吸水性ポリマーの粒子が上下2枚の前記長尺状基体部で挟まれ、固定されている前記<1>~<25>の何れか1に記載のシート状物。
<27>
前記吸水性ポリマーの粒子の上に、前記長尺状基体部よりも幅広の基材シートが更に配されており、該吸水性ポリマーの粒子が前記長尺状基体部及び前記基材シートで挟まれ、固定されている前記<1>~<25>の何れか1に記載のシート状物。
前記<1>~<27>の何れか1に記載のシート状物と、該シート状物を被覆する液透過性のコアラップシートとを有する吸収性物品用の吸収体。
前記<28>に記載の吸収体と、該吸収体の肌対向面側に配された表面シートと、該吸収体の非肌対向面側に配された裏面シートとを有する吸収性物品。
横方向と、該横方向よりも長さの長い縦方向と、厚み方向とを有する長尺状基体部、及び該長尺状基体部の一方の面の表面に固定された吸水性ポリマーの粒子を備えた吸収性ユニットを複数本具備し、各該吸収性ユニットを、その縦方向が少なくとも一方向を向くように配列させてなり、
前記吸水性ポリマーの粒子が液を吸収すると、該吸水性ポリマーの粒子が、前記長尺状基体部の前記縦方向に沿う側縁部を越えて膨潤し、且つ該長尺状基体部の位置が、前記厚み方向において、液を吸収する前の位置と異なるようになされている吸収性物品用のシート状物の製造方法であって、
帯状の基材シートをカットして複数本の前記長尺状基体部を形成するカット工程と、形成された複数本の前記長尺状基体部の一方の面の表面に前記吸水性ポリマーの粒子を散布する吸水性ポリマーの粒子散布工程とを備えるシート状物の製造方法。
前記吸水性ポリマーの粒子散布工程よりも前工程に、接着剤を塗布する接着剤塗布工程を備えている前記<30>に記載のシート状物の製造方法。
<32>
前記カット工程の後工程に前記接着剤塗布工程を備え、該接着剤塗布工程の後工程に前記吸水性ポリマーの粒子散布工程を備えており、
前記カット工程にて形成された前記長尺状基体部の一方の面の表面に、前記接着剤塗布工程にて前記接着剤を塗布し、該長尺状基体部の一方の面の表面に塗布された該接着剤上に、前記吸水性ポリマーの粒子散布工程にて前記吸水性ポリマーの粒子を散布して、該接着剤を介して該吸水性ポリマーの粒子が該長尺状基体部に固定された前記シート状物を形成する前記<31>に記載のシート状物の製造方法。
<33>
前記カット工程においては、前記帯状の基材シートを、該基材シートの搬送方向に沿ってカットし、且つ直交する方向に複数箇所カットして複数本の長尺状基体部を形成する前記<30>~<32>の何れか1に記載のシート状物の製造方法。
<34>
前記カット工程において、前記帯状の基材シートに、該基材シートの搬送方向に間欠的に配される非カット部を形成する前記<30>~<33>の何れか1に記載のシート状物の製造方法。
前記カット工程において、前記帯状の基材シートに、該基材シートの搬送方向に間欠的に配される非カット部を形成し、
前記接着剤塗布工程において、前記非カット部を除いて、間欠的に接着剤を塗布する前記<31>又は<32>に記載のシート状物の製造方法。
<36>
前記カット工程において、前記帯状の基材シートに、該基材シートの搬送方向に間欠的に配される非カット部を形成し、
前記非カット部を除いて、前記吸水性ポリマーの粒子を散布する前記<30>~<35>の何れか1に記載のシート状物の製造方法。
<37>
前記吸水性ポリマーの散布工程後に、散布された吸水性ポリマーの粒子に接着剤を塗布する前記<30>~<35>の何れか1に記載のシート状物の製造方法。
<38>
前記カット工程において、前記基材シートをカットして複数本の前記長尺状基体部を形成し、
形成した複数本の前記長尺状基体部全部の一方の面の表面に接着剤を塗布し、
複数本の前記長尺状基体部における、前記基材シートをその直交する方向の二等分の位置より一方側に位置する複数本の長尺状基体部の一方の面の表面に塗布した前記接着剤上にのみ前記吸水性ポリマーの粒子を散布し、該接着剤を介して該吸水性ポリマーの粒子を前記長尺状基体部に固定させ、ついで前記二等分の位置よりも他方側に位置する、一方の面の表面に前記接着剤が塗布された複数本の長尺状基体部を前記吸水性ポリマーの粒子の上に折り返して、前記長尺状基体部で前記吸水性ポリマーの粒子を挟んだシート状物を得る前記<30>~<37>の何れか1に記載のシート状物の製造方法。
<39>
前記カット工程にて、前記基材シートをカットして複数本の前記長尺状基体部を形成し、
前記長尺状基体部の一方の面の表面に接着剤を塗布し、
前記接着剤が塗布された前記長尺状基体部における該接着剤が塗布された面に前記吸水性ポリマーの粒子を散布し、
散布された前記吸水性ポリマーの粒子の上に更に接着剤を塗布し、
前記吸水性ポリマーの粒子の上に塗布された前記接着剤上に、第2の基材シートをカットすることによって得られた第2長尺状基体部を配して、前記長尺状基体部及び前記第2長尺状基体部で前記吸水性ポリマーの粒子を挟んだシート状物を得る前記<30>~<37>の何れか1に記載のシート状物の製造方法。
<40>
前記カット工程にて、前記基材シートをカットして複数本の前記長尺状基体部を形成し、
前記長尺状基体部の一方の面の表面に接着剤を塗布し、
前記接着剤が塗布された前記長尺状基体部における該接着剤が塗布された面の表面に前記吸水性ポリマーの粒子を散布し、
散布された前記吸水性ポリマーの粒子の上に更に接着剤を塗布し、
前記吸水性ポリマーの粒子の上に塗布された前記接着剤上に、前記長尺状基体部よりも幅広の第2基材シートを配して、前記長尺状基体部及び前記第2基材シートで前記吸水性ポリマーの粒子を挟んだシート状物を得る前記<30>~<37>の何れか1に記載のシート状物の製造方法。
前記表面シート、前記裏面シート、及びこれら両シート間に介在された前記吸収体を具備する吸収性本体を備え、着用者の前後方向に対応する物品縦方向及び該物品縦方向に直交する物品横方向を有する吸収性物品であって、前記吸収体は、横方向と、横方向よりも長さの長い縦方向と、厚み方向とを有する前記長尺状基体部、及び該長尺状基体部の一方の面の表面に固定された前記吸水性ポリマーの粒子を備えた前記吸収性ユニットを複数本具備し、各該吸収性ユニットを、その縦方向が少なくとも一方向を向くように配列させてなる前記シート状物から形成された吸収性コアを有しており、前記吸収性コアは、物品横方向中央の中央領域と、該中央領域よりも物品横方向外方に設けられた一対のサイド領域とを具備し、各前記サイド領域において、各前記吸収性ユニットは、その縦方向が物品横方向を向くように配列されており、前記表面シートは、前記吸収体の肌対向面を被覆し、該吸収体の両側縁部から物品横方向外方に延出した延出部位を有しており、該延出部位が、該吸収体の非肌対向面側に折り返されて、前記吸収性コアの各前記サイド領域に位置する前記吸収体の非肌対向面を被覆しており、前記表面シートにおける折り返された前記延出部位は、その先端部が、該延出部位と隣接する前記吸収性物品の構成部材に固定されている、前記<29>に記載の吸収性物品。
<42>
前記吸収体の両側縁部それぞれに、該側縁部に沿って弾性部材を配し、該弾性部材の収縮力によって、前記吸収性コアの各前記サイド領域に位置する前記吸収体が着用者の肌側に向かって起立する、前記<41>に記載の吸収性物品。
<43>
前記吸収性コアの各前記サイド領域に配された前記吸収性ユニットの前記長尺状基体部の縦方向に沿う両側縁部間の距離と、前記吸収性コアの前記中央領域に配された前記吸収性ユニットの前記長尺状基体部の縦方向に沿う両側縁部間の距離とが異なっている、前記<41>又は<42>に記載の吸収性物品。
<44>
前記吸収性コアの前記中央領域において、各前記吸収性ユニットは、その縦方向が物品縦方向を向くように配列されている、前記<41>~<43>の何れか1に記載の吸収性物品。
<45>
前記吸収性コアの前記中央領域に配された前記吸収性ユニットの前記吸水性ポリマーの坪量の方が、前記吸収性コアの各前記サイド領域に配された前記吸収性ユニットの前記吸水性ポリマーの坪量よりも大きい、前記<41>~<44>の何れか1に記載の吸収性物品。
<46>
前記表面シートの前記延出部位の先端部と前記吸収性物品の構成部材とが接合された位置が、前記吸収性コアの前記中央領域と各前記サイド領域との境界に対応する位置と一致している、前記<41>~<45>の何れか1に記載の吸収性物品。
<47>
前記吸収性コアは、膨潤後の状態において、該吸水性ポリマーの粒子が、前記長尺状基体部の前記縦方向に沿う側縁部を越えて膨潤し、且つ該長尺状基体部における前記吸水性ポリマーの粒子の位置が、前記厚み方向において、液を吸収する前の位置と異なるようになされている、前記<41>~<46>の何れか1に記載の吸収性物品。
<48>
前記吸収性コアの前記中央領域に、前記吸収性ユニットが配列されており、前記吸収性コアは、前記中央領域における前記吸収性ユニットが配列された部分では、前記吸収性物品に固定されていない、前記<41>~<47>の何れか1に記載の吸収性物品。
<49>
前記吸収性コアは、前記縦方向の両端部が、前記吸収性物品に固定されている、前記<41>~<48>の何れか1に記載の吸収性物品。
<50>
前記吸収性コアは、前記縦方向に沿う両側部が、前記吸収性物品に固定されている、前記<41>~<49>の何れか1に記載の吸収性物品。
<51>
前記吸収性コアは、前記縦方向の両端部又は前記縦方向に沿う両側部には、前記吸水性ポリマーの粒子が固定されていない、前記<41>~<50>の何れか1に記載の吸収性物品。
<52>
前記吸収性コアは、前記長尺状基体部が親水性である、前記<41>~<51>の何れか1に記載の吸収性物品。
<53>
前記吸収性コアは、前記長尺状基体部の一方の面の表面に固定された前記吸水性ポリマーの種類と、該長尺状基体部の他方の面の表面に固定された該吸水性ポリマーの種類とが異なる、前記<41>~<52>の何れか1に記載の吸収性物品。
<54>
前記サイド領域は、複数本の前記吸収性ユニットが互いに交差しないように、各前記吸収性ユニットが物品横方向Xに平行に配されている、前記<41>~<53>の何れか1に記載の吸収性物品。
<55>
前記サイド領域は、均一な幅の前記長尺状基体部を有する前記吸収性ユニットを複数本用い、該吸収性ユニットの縦方向(y1方向)を前記シート状物の物品横方向に向くように前記シート状物の物品横方向に平行に配し、且つ物品縦方向に並置して形成されている、前記<41>~<54>の何れか1に記載の吸収性物品。
<56>
前記サイド領域は、前記長尺状基体部の横方向(x1方向)において隣り合う前記吸収性ユニット間においては、介在物が非存在状態となっている、前記<41>~<55>の何れか1に記載の吸収性物品。
<57>
前記中央領域は、前記吸収性ユニットの縦方向(y1方向)が前記シート状物の物品縦方向を向くように前記吸収性ユニットを複数本配列させて形成されており、更に好適には、複数本の前記吸収性ユニットが互いに交差しないように、各前記吸収性ユニットが物品縦方向Yに平行に配されている、前記<41>~<56>の何れか1に記載の吸収性物品。
<58>
前記中央領域では、前記長尺状基体部の横方向(x1方向)において隣り合う前記吸収性ユニット間においては、介在物が非存在状態となっている、前記<41>~<57>の何れか1に記載の吸収性物品。
<59>
前記シート状物は、使用前の状態において、一方向を向くように前記吸収性ユニットを複数本配列した吸収領域を有し、
前記シート状物全体に対する前記吸収領域の割合は、20%以上であることが好ましく、50%以上であることが更に好ましく、そして、100%以下であることが好ましく、90%以下であることが更に好ましい、前記<41>~<58>の何れか1に記載の吸収性物品。
<60>
前記サイド領域において、前記吸収性ユニットの縦方向(y1方向)を物品横方向Xに向くように配する場合、該吸収性ユニットは、各前記サイド領域に、10本以上配されていることが好ましく、50本以上配されていることが更に好ましく、そして、3500本以下配されていることが好ましく、1700本以下配されていることが更に好ましい、前記<41>~<59>の何れか1に記載の吸収性物品。
<61>
前記中央領域において、前記吸収性ユニットの縦方向(y1方向)を物品縦方向Yに向くように配する場合、該吸収性ユニットは、前記中央領域に、2本以上配されていることが好ましく、10本以上配されていることが更に好ましく、1000本以下配されていることが好ましく、500本以下配されていることが更に好ましい、前記<41>~<60>の何れか1に記載の吸収性物品。
<62>
各前記サイド領域に配された1本の前記長尺状基体部の幅(横方向(x1方向)の長さ)が、前記中央領域に配された1本の前記長尺状基体部の幅(横方向(x1方向)の長さ)よりも短い、前記<41>~<61>の何れか1に記載の吸収性物品。
<63>
前記シート状物の前記中央領域において、該シート状物の幅に対する1本の前記長尺状基体部の幅(横方向(x1方向)の長さ)の割合は、0.1%以上であることが好ましく、0.2%以上であることが更に好ましく、そして、20%以下であることが好ましく、4%以下であることが更に好ましい、前記<41>~<62>の何れか1に記載の吸収性物品。
<64>
前記中央領域における前記長尺状基体部の幅は、0.3mm以上であることが好ましく、0.6mm以上であることが更に好ましく、そして、10mm以下であることが好ましく、2mm以下であることが更に好ましい、前記<41>~<63>の何れか1に記載の吸収性物品。
<65>
前記シート状物の前記中央領域において、該シート状物1の長さに対する1本の前記長尺状基体部2の長さ(縦方向(y1方向)の長さ)の割合は、2%以上であることが好ましく、20%以上であることが更に好ましく、そして、100%以下であることが好ましく、98%以下であることが更に好ましい、前記<41>~<64>の何れか1に記載の吸収性物品。
<66>
前記中央領域における前記長尺状基体部の長さは、20mm以上であることが好ましく、200mm以上であることが更に好ましく、そして、1000mm以下であることが好ましく、980mm以下であることが更に好ましい、前記<41>~<65>の何れか1に記載の吸収性物品。
<67>
前記サイド領域において、前記シート状物の幅に対する1本の該長尺状基体部の長さ(縦方向(y1方向)の長さ))の割合は、1.5%以上であることが好ましく、3%以上であることが更に好ましく、そして、47%以下であることが好ましく、40%以下であることが更に好ましい、前記<41>~<66>の何れか1に記載の吸収性物品。
<68>
各前記サイド領域における前記長尺状基体部の長さは、5mm以上であることが好ましく、10mm以上であることが更に好ましく、そして、140mm以下であることが好ましく、120mm以下であることが更に好ましい、前記<41>~<67>の何れか1に記載の吸収性物品。
<69>
前記シート状物の各前記サイド領域において、シート状物の長さに対する1本の前記長尺状基体部の(横方向(x1方向)の長さ)の割合は、0.03%以上であることが好ましく、0.06%以上であることが更に好ましく、そして、10%以下であることが好ましく、2%以下であることが更に好ましい、前記<41>~<68>の何れか1に記載の吸収性物品。
<70>
各前記サイド領域における前記長尺状基体部の幅は、0.3mm以上であることが好ましく、0.6mm以上であることが更に好ましく、そして、10mm以下であることが好ましく、2mm以下であることが更に好ましい、前記<41>~<69>の何れか1に記載の吸収性物品。
<71>
前記長尺状基体部の一方の面の表面に固定させる吸水性ポリマーの坪量は、10g/m2以上250g/m2以下であることが好ましく、該長尺状基体部の他方の面の表面に固定させる吸水性ポリマー3の坪量は、30g/m2以上400g/m2以下であることが好ましい、前記<41>~<70>の何れか1に記載の吸収性物品。
<72>
前記長尺状基体部の一方の面の表面に固定された吸水性ポリマーに関し、2.0kPaでの加圧下通液速度は、20ml/min以上であることが好ましく、40ml/min以上であることが更に好ましく、そして、1000ml/min以下であることが好ましく、800ml/min以下であることが更に好ましい、前記<41>~<71>の何れか1に記載の吸収性物品。
<73>
前記長尺状基体部の他方の面の表面に固定された吸水性ポリマーの粒子に関し、2.0kPaでの加圧下通液速度は、0ml/min以上であることが好ましく、10ml/min以上であることが更に好ましく、そして、400ml/min以下であることが好ましく、200ml/min以下であることが更に好ましい、前記<41>~<72>の何れか1に記載の吸収性物品。
<74>
前記長尺状基体部の一方の面の表面に固定された吸水性ポリマーに関し、その遠心保持量(吸水量)は、20g/g以上であることが好ましく、25g/g以上であることが更に好ましく、そして、50g/g以下であることが好ましく、45g/g以下であることが更に好ましい、前記<41>~<73>の何れか1に記載の吸収性物品。
<75>
前記長尺状基体部の他方の面の表面に固定された吸水性ポリマーに関し、その遠心保持量(吸水量)は、25g/g以上であることが好ましく、30g/g以上であることが更に好ましく、そして、65g/g以下であることが好ましく、55g/g以下であることが更に好ましい、前記<41>~<74>の何れか1に記載の吸収性物品。
<76>
各前記長尺状基体部の両面(上面及び下面)の表面において、前記吸収性コアである前記シート状物の前記中央領域に配された前記吸収性ユニットの吸水性ポリマーの坪量の方が、前記吸収性コアである前記シート状物の各前記サイド領域に配された前記吸収性ユニットの吸水性ポリマーの坪量よりも大きい、前記<41>~<75>の何れか1に記載の吸収性物品。
<77>
前記中央領域に配された前記吸収性ユニットの吸水性ポリマーの坪量は、片面あたり、30g/m2以上400g/m2以下であることが好ましく、50g/m2以上300g/m2以下であることが更に好ましい、前記<41>~<76>の何れか1に記載の吸収性物品。
<78>
各前記サイド領域に配された前記吸収性ユニットの吸水性ポリマーの坪量は、片面あたり、10g/m2以上250g/m2以下であることが好ましく、30g/m2以上150g/m2以下であることが更に好ましい、前記<41>~<77>の何れか1に記載の吸収性物品。
<79>
前記長尺状基体部の縦方向(y1方向)に沿う両側縁部間の距離が、使用前(膨潤前)の状態の吸水性ポリマーの粒子の平均粒子径よりも大きく、膨潤後の状態の吸水性ポリマーの粒子の平均粒子径よりも小さいことが好ましい、前記<41>~<78>の何れか1に記載の吸収性物品。
<80>
使用前(膨潤前)の状態の吸水性ポリマーの粒子の平均粒子径は、20μm以上であることが好ましく、200μm以上であることが更に好ましく、そして、700μm以下であることが好ましく、500μm以下であることが更に好ましい、前記<41>~<79>の何れか1に記載の吸収性物品。
<81>
膨潤後の状態の吸水性ポリマーの平均粒子径は、200μm以上であることが好ましく、800μm以上であることが更に好ましく、そして、3000μm以下であることが好ましく、2000μm以下であることが更に好ましい、前記<41>~<80>の何れか1に記載の吸収性物品。
Claims (30)
- 横方向と、該横方向よりも長さの長い縦方向と、厚み方向とを有する長尺状基体部、及び該長尺状基体部の一方の面の表面に固定された吸水性ポリマーの粒子を備えた吸収性ユニットを複数本具備し、各該吸収性ユニットを、その縦方向が少なくとも一方向を向くように配列させてなる吸収性物品用のシート状物であって、
前記吸水性ポリマーの粒子が液を吸収すると、該吸水性ポリマーの粒子が、前記長尺状基体部の前記縦方向に沿う側縁部を越えて膨潤し、且つ該長尺状基体部の位置が、前記厚み方向において、液を吸収する前の位置と異なるようになされているシート状物。 - 前記吸水性ポリマーの粒子が液を吸収する前に、前記吸水性ポリマーの粒子が、前記長尺状基体部の前記側縁部を越えてはみ出している請求項1に記載のシート状物。
- 前記シート状物は、前記縦方向の両端部に、複数の前記長尺状基体部が前記横方向に繋がった非スリット領域を備えている請求項1又は2に記載のシート状物。
- 前記シート状物は、前記縦方向の両端部が、前記吸収性物品に固定されている請求項1~3の何れか1項に記載のシート状物。
- 前記長尺状基体部は、前記縦方向に沿う両側縁部間の距離が、前記吸水性ポリマーの粒子が液を吸収する前の状態の平均粒子径よりも大きく、前記吸水性ポリマーの粒子が液を吸収して膨潤した状態の平均粒子径よりも小さい請求項1~4の何れか1項に記載のシート状物。
- 前記長尺状基体部は、不織布である請求項1~5の何れか1項に記載のシート状物。
- 前記吸水性ポリマーの粒子は、接着剤を介して前記長尺状基体部に固定されている請求項1~6の何れか1項に記載のシート状物。
- 前記シート状物は、前記縦方向の両端部に、複数の前記長尺状基体部が前記横方向に繋がった非スリット領域を備えており、該非スリット領域には、前記吸水性ポリマーの粒子が固定されていない請求項1~7の何れか1項に記載のシート状物。
- 前記長尺状基体部は、親水性である請求項1~8の何れか1項に記載のシート状物。
- 前記吸水性ポリマーの粒子が液を吸収する前に、前記吸水性ポリマーの粒子は、前記長尺状基体部の他方の面の表面に固定されている請求項1~9の何れか1項に記載のシート状物。
- 前記長尺状基体部の他方の面の表面に固定された前記吸水性ポリマーの粒子の坪量の方が、該長尺状基体部の一方の面の表面に固定された該吸水性ポリマーの粒子の坪量よりも大きい請求項10に記載のシート状物。
- 前記長尺状基体部の一方の面の表面に固定された前記吸水性ポリマーの粒子は、該長尺状基体部の他方の面の表面に固定された該吸水性ポリマーの粒子に比べて、加圧下通液性能が高く、遠心保持量が低い請求項10又は11に記載のシート状物。
- 前記横方向において隣り合う前記吸収性ユニット間においては、介在物が非存在状態となっている請求項1~12の何れか1項に記載のシート状物。
- 前記吸水性ポリマーの粒子の上に、更に長尺状基体部が配されており、該吸水性ポリマーの粒子が上下2枚の前記長尺状基体部で挟まれ、固定されている請求項1~13の何れか1項に記載のシート状物。
- 前記吸水性ポリマーの粒子の上に、前記長尺状基体部よりも幅広の基材シートが更に配されており、該吸水性ポリマーの粒子が前記長尺状基体部及び前記基材シートで挟まれ、固定されている請求項1~13の何れか1項に記載のシート状物。
- 請求項1~15の何れか1項に記載のシート状物と、該シート状物を被覆する液透過性のコアラップシートとを有する吸収性物品用の吸収体。
- 請求項16に記載の吸収体と、該吸収体の肌対向面側に配された表面シートと、該吸収体の非肌対向面側に配された裏面シートとを有する吸収性物品。
- 前記表面シート、前記裏面シート、及びこれら両シート間に介在された前記吸収体を具備する吸収性本体を備え、着用者の前後方向に対応する物品縦方向及び該物品縦方向に直交する物品横方向を有する吸収性物品であって、
前記吸収体は、横方向と、該横方向よりも長さの長い縦方向と、厚み方向とを有する前記長尺状基体部、及び該長尺状基体部の一方の面の表面に固定された前記吸水性ポリマーの粒子を備えた前記吸収性ユニットを複数本具備し、各該吸収性ユニットを、その縦方向が少なくとも一方向を向くように配列させてなる前記シート状物から形成された吸収性コアを有しており、
前記吸収性コアは、物品横方向中央の中央領域と、該中央領域よりも物品横方向外方に設けられた一対のサイド領域とを具備し、
各前記サイド領域において、各前記吸収性ユニットは、その縦方向が物品横方向を向くように配列されており、
前記表面シートは、前記吸収体の肌対向面を被覆し、該吸収体の両側縁部から物品横方向外方に延出した延出部位を有しており、該延出部位が、該吸収体の非肌対向面側に折り返されて、前記吸収性コアの各前記サイド領域に位置する前記吸収体の非肌対向面を被覆しており、
前記表面シートにおける折り返された前記延出部位は、その先端部が、該延出部位と隣接する前記吸収性物品の構成部材に固定されている、請求項17に記載の吸収性物品。 - 前記吸収体の両側縁部それぞれに、該側縁部に沿って弾性部材を配し、該弾性部材の収縮力によって、前記吸収性コアの各前記サイド領域に位置する前記吸収体が着用者の肌側に向かって起立する、請求項18に記載の吸収性物品。
- 前記吸収性コアの各前記サイド領域に配された前記吸収性ユニットの前記長尺状基体部の縦方向に沿う両側縁部間の距離と、前記吸収性コアの前記中央領域に配された前記吸収性ユニットの前記長尺状基体部の縦方向に沿う両側縁部間の距離とが異なっている、請求項18又は19に記載の吸収性物品。
- 横方向と、該横方向よりも長さの長い縦方向と、厚み方向とを有する長尺状基体部、及び該長尺状基体部の一方の面の表面に固定された吸水性ポリマーの粒子を備えた吸収性ユニットを複数本具備し、各該吸収性ユニットを、その縦方向が少なくとも一方向を向くように配列させてなり、
前記吸水性ポリマーの粒子が液を吸収すると、該吸水性ポリマーの粒子が、前記長尺状基体部の前記縦方向に沿う側縁部を越えて膨潤し、且つ該長尺状基体部の位置が、前記厚み方向において、液を吸収する前の位置と異なるようになされている吸収性物品用のシート状物の製造方法であって、
帯状の基材シートをカットして複数本の前記長尺状基体部を形成するカット工程と、形成された複数本の前記長尺状基体部の一方の面の表面に前記吸水性ポリマーの粒子を散布する吸水性ポリマーの粒子散布工程とを備えるシート状物の製造方法。 - 前記吸水性ポリマーの粒子散布工程よりも前工程に、接着剤を塗布する接着剤塗布工程を備えている請求項21に記載のシート状物の製造方法。
- 前記カット工程の後工程に前記接着剤塗布工程を備え、該接着剤塗布工程の後工程に前記吸水性ポリマーの粒子散布工程を備えており、
前記カット工程にて形成された前記長尺状基体部の一方の面の表面に、前記接着剤塗布工程にて前記接着剤を塗布し、該長尺状基体部の一方の面の表面に塗布された該接着剤上に、前記吸水性ポリマーの粒子散布工程にて前記吸水性ポリマーの粒子を散布して、該接着剤を介して該吸水性ポリマーの粒子が該長尺状基体部の一方の面の表面に固定された前記吸収性ユニットを形成する請求項22に記載のシート状物の製造方法。 - 前記カット工程において、前記帯状の基材シートに、該基材シートの搬送方向に間欠的に配される非カット部を形成する請求項21~23の何れか1項に記載のシート状物の製造方法。
- 前記カット工程において、前記帯状の基材シートに、該基材シートの搬送方向に間欠的に配される非カット部を形成し、
前記接着剤塗布工程において、前記非カット部を除いて、間欠的に接着剤を塗布する請求項23に記載のシート状物の製造方法。 - 前記非カット部を除いて、前記吸水性ポリマーの粒子を散布する請求項24または25に記載のシート状物の製造方法。
- 前記吸水性ポリマーの散布工程後に、散布された吸水性ポリマーの粒子に接着剤を塗布する請求項21~26の何れか1項に記載のシート状物の製造方法。
- 前記カット工程において、前記基材シートをカットして複数本の前記長尺状基体部を形成し、
形成した複数本の前記長尺状基体部全部の一方の面の表面に接着剤を塗布し、
複数本の前記長尺状基体部における、前記基材シートをその直交する方向の二等分の位置より一方側に位置する複数本の長尺状基体部の一方の面の表面に塗布した前記接着剤上にのみ前記吸水性ポリマーの粒子を散布し、該接着剤を介して該吸水性ポリマーの粒子を前記長尺状基体部に固定させ、ついで前記二等分の位置よりも他方側に位置する、一方の面の表面に前記接着剤が塗布された複数本の長尺状基体部を前記吸水性ポリマーの粒子の上に折り返して、前記長尺状基体部で前記吸水性ポリマーの粒子を挟んだシート状物を得る請求項21に記載のシート状物の製造方法。 - 前記カット工程にて、前記基材シートをカットして複数本の前記長尺状基体部を形成し、
前記長尺状基体部の一方の面の表面に接着剤を塗布し、
前記接着剤が塗布された前記長尺状基体部における該接着剤が塗布された面に前記吸水性ポリマーの粒子を散布し、
散布された前記吸水性ポリマーの粒子の上に更に接着剤を塗布し、
前記吸水性ポリマーの粒子の上に塗布された前記接着剤上に、第2の基材シートをカットすることによって得られた第2長尺状基体部を配して、前記長尺状基体部及び前記第2長尺状基体部で前記吸水性ポリマーの粒子を挟んだシート状物を得る請求項21に記載のシート状物の製造方法。 - 前記カット工程にて、前記基材シートをカットして複数本の前記長尺状基体部を形成し、
前記長尺状基体部の一方の面の表面に接着剤を塗布し、
前記接着剤が塗布された前記長尺状基体部における該接着剤が塗布された面の表面に前記吸水性ポリマーの粒子を散布し、
散布された前記吸水性ポリマーの粒子の上に更に接着剤を塗布し、
前記吸水性ポリマーの粒子の上に塗布された前記接着剤上に、前記長尺状基体部よりも幅広の第2基材シートを配して、前記長尺状基体部及び前記第2基材シートで前記吸水性ポリマーの粒子を挟んだシート状物を得る請求項21に記載のシート状物の製造方法。
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