WO2017022655A1 - 吸収性物品 - Google Patents

吸収性物品 Download PDF

Info

Publication number
WO2017022655A1
WO2017022655A1 PCT/JP2016/072280 JP2016072280W WO2017022655A1 WO 2017022655 A1 WO2017022655 A1 WO 2017022655A1 JP 2016072280 W JP2016072280 W JP 2016072280W WO 2017022655 A1 WO2017022655 A1 WO 2017022655A1
Authority
WO
WIPO (PCT)
Prior art keywords
polymer
sheet
joint
layer sheet
absorbent article
Prior art date
Application number
PCT/JP2016/072280
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
小縄　聡子
Original Assignee
大王製紙株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 大王製紙株式会社 filed Critical 大王製紙株式会社
Publication of WO2017022655A1 publication Critical patent/WO2017022655A1/ja

Links

Images

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00—Bandages or dressings; Absorbent pads
    • A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/53—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
    • A61F13/532—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 inhomogeneous in the plane of the pad
    • 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
    • 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
    • A61F13/535—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 inhomogeneous in the plane of the pad, e.g. core absorbent layers being of different sizes

Definitions

  • the present invention relates to an absorbent article such as a sanitary napkin, a panty liner, an incontinence pad, and more particularly to an absorbent article provided with a polymer sheet in which a superabsorbent polymer is disposed between an upper layer sheet and a lower layer sheet.
  • a body fluid is absorbed and retained between a liquid-impermeable back sheet such as a polyethylene sheet or a polyethylene sheet-laminated nonwoven fabric and a liquid-permeable surface sheet such as a nonwoven fabric or a liquid-permeable plastic sheet.
  • a liquid-impermeable back sheet such as a polyethylene sheet or a polyethylene sheet-laminated nonwoven fabric
  • a liquid-permeable surface sheet such as a nonwoven fabric or a liquid-permeable plastic sheet.
  • the absorbent body has a polymer sheet in which a superabsorbent polymer is disposed between two sheets.
  • the water-absorbent sheet includes a first sheet, a second sheet, and a water-absorbent resin powder fixed between the two sheets with an adhesive, the first sheet and the second sheet, A plurality of water-absorbing resin powder existing areas are formed between the plurality of water-absorbing resin powders, and each of the plurality of existing areas extends in the longitudinal direction of the water-absorbent sheet and has a predetermined interval in the width direction of the water-absorbent sheet.
  • the absorbent body has a structure in which a water-absorbing polymer is disposed between the first sheet and the second sheet, and the first sheet and the second sheet have a predetermined uneven shape, What has been filled with a water-absorbing polymer leaving a gap in the internal space of the protrusion is disclosed.
  • Patent Document 3 a first sheet layer having an absorbent accommodating pocket, an aggregate of superabsorbent materials accommodated in the absorbent accommodating pocket, and a second disposed on the first sheet layer. Having a sheet layer and a bonding bead disposed between each pocket, the first sheet layer forming a pleat at the superabsorbent material assembly, the outer periphery of the pocket formed by the pleat as described above An absorbent article is disclosed that exists in a zone beyond the periphery of.
  • the adjacent existence areas are partitioned by non-existence areas, and the first sheet and the second sheet in the sheet peeling area are formed by liquid absorption and swelling of the water absorbent resin powder.
  • the existence areas communicate with each other, so when the water-absorbent resin powder absorbs water and swells, adjacent water-absorbent resin powders are bonded together, so-called ⁇ gel blocking '' occurs, There is a possibility that the desired water absorbing power cannot be expressed.
  • the absorbent body described in Patent Document 2 since the water-absorbing polymer is filled in the internal space of the protruding portion leaving a gap, the water-absorbing polymer before liquid absorption moves in the internal space and is biased. In some cases, the thickness after liquid absorption is uneven. Furthermore, in the absorbent article described in Patent Document 3, pleats are formed on the outer periphery of the absorbent-accommodating pocket, and the pleats are enlarged due to swelling of the superabsorbent material, but before the pleats are enlarged. In some cases, the superabsorbent material may cause gel blocking to make liquid absorption impossible, and the pleats may be loosened before liquid absorption to cause bias in the contained superabsorbent material.
  • the main problem of the present invention is to provide an absorbent article that can eliminate the movement and bias of the polymer before liquid absorption and can efficiently absorb the polymer.
  • a polymer sheet in which a superabsorbent polymer is interposed between an upper layer sheet disposed on the skin side and a lower layer sheet disposed on the non-skin side is provided as the present invention according to claim 1.
  • An absorbent article comprising: The polymer sheet is partitioned into a plurality of polymer-encapsulated cells in which the superabsorbent polymer is encapsulated by a first joint that joins the upper layer sheet and the lower layer sheet, and at the center of each polymer-encapsulated cell.
  • a polymer non-existing region in which the superabsorbent polymer is not interposed is formed by the second joint portion that joins the upper layer sheet and the lower layer sheet,
  • the bonding strength of the second bonding portion is set to be smaller than the bonding strength of the first bonding portion, and when the superabsorbent polymer absorbs liquid and swells, the second bonding portion from the first bonding portion.
  • the absorbent article is characterized in that the joining of the parts is preferentially peeled off.
  • the polymer sheet is partitioned into a plurality of polymer-encapsulated cells in which a superabsorbent polymer is encapsulated by a first joining portion that joins the upper layer sheet and the lower layer sheet,
  • a structure in which a polymer non-existing region in which the superabsorbent polymer is not formed is formed by a second joint part that joins the upper layer sheet and the lower layer sheet.
  • the joint strength of the second joint part is set smaller than the joint strength of the first joint part, and when the superabsorbent polymer absorbs liquid and swells, it is second from the first joint part.
  • the joint at the joint is peeled off preferentially.
  • the second joining portion is joined entirely in the region of the polymer non-existing region, partially joined in the region, or continuous only in the outer periphery of the region.
  • the second bonding part forming the polymer non-existing region is bonded to the entire region of the polymer non-existing region in order to surely prevent unintentional peeling before liquid absorption.
  • the region may be partially joined or only the outer periphery of the region may be joined with a continuous line or an intermittent line so that the joining of the second joining part is surely peeled when the liquid swells and swells. It stipulates.
  • each of the polymer-encapsulated cells is disposed adjacent to the first joint portion as a boundary line without leaving a gap between adjacent polymer-encapsulated cells.
  • the polymer-enclosed cells are provided without any gaps, and the liquid absorbing property To become better.
  • each of the polymer-encapsulated cells is surrounded by an individual first joint, and is adjacently disposed with a gap between the adjacent polymer-encapsulated cells.
  • each polymer-encapsulated cell is surrounded by an individual first joint, and is arranged adjacent to each other with a gap between adjacent polymer-encapsulated cells.
  • the gap between the adjacent polymer-encapsulated cells becomes a buffer zone, and distortion of the entire polymer sheet can be prevented.
  • the polymer-encapsulated cell is divided into a plurality by a third joint extending from the polymer non-existing region to the first joint,
  • a bonding strength of the third bonding portion is set smaller than a bonding strength of the first bonding portion and larger than a bonding strength of the second bonding portion.
  • the bonding strength at this time is preferably in the relationship of second bonding portion ⁇ third bonding portion ⁇ first bonding portion.
  • the present invention according to claim 6 is characterized in that a fiber assembly layer containing a water-absorbing fiber assembly is disposed on the non-skin side or skin side of the polymer sheet. Articles are provided.
  • the absorbability of body fluid is further enhanced by combining the polymer sheet and the fiber assembly layer.
  • FIG. 3 is a partially broken development view of a polymer sheet 4.
  • FIG. 4 is a view taken along the line IV-IV in FIG. 3.
  • FIG. 5 is a view taken along line VV in FIG. 3.
  • A) is a conventional polymer sheet
  • B) is a top view which shows the state before and behind liquid absorption of the polymer sheet 4 which concerns on this invention. It is a top view which shows the polymer enclosure cell 14 which concerns on another example of a form.
  • (A) to (C) are plan views showing the polymer-encapsulated cell 14.
  • FIG. (A), (B) is a plan view showing a polymer-encapsulated cell 14 according to another embodiment, and (C) is a view taken along the line CC of (A).
  • 3 is a side view showing a production apparatus for a polymer sheet 4.
  • FIG. (A) to (D) are cross-sectional views showing the procedure for producing the polymer sheet 4. It is sectional drawing which shows the manufacture procedure of the polymer sheet 4 which concerns on another form example. It is sectional drawing (the 1) of the sanitary napkin 1 which concerns on another form example. It is sectional drawing (the 2) of the sanitary napkin 1 which concerns on another form example.
  • the sanitary napkin 1 has a liquid-impervious back sheet 2 made of a polyethylene sheet, a polypropylene sheet, or the like, and a permeate that quickly permeates menstrual blood or a cage.
  • a liquid surface sheet 3 a polymer sheet 4 having a structure in which a superabsorbent polymer is disposed between two sheets interposed between the two sheets 2 and 3, and both sides of the surface along the longitudinal direction.
  • the side nonwoven fabrics 7 and 7 are arranged.
  • the outer edge of the liquid-impervious back sheet 2 and liquid-permeable surface sheet 3 is an adhesive such as hot melt, heat seal, etc.
  • the liquid-impermeable back sheet 2 and the side nonwoven fabric 7 that are joined by the adhesive means and extend laterally from the side edges of the polymer sheet 4 at both side edges thereof are adhesives such as hot melt, Joined by adhesive means such as heat sealing, an outer peripheral flap portion where the polymer sheet 4 does not exist is formed on the outer periphery.
  • the structure of the sanitary napkin 1 will be described in detail.
  • a sheet material having at least water shielding properties such as an olefin resin sheet such as polyethylene or polypropylene is used.
  • a laminated nonwoven fabric obtained by laminating a nonwoven fabric on a polyethylene sheet or the like, or A nonwoven fabric sheet (in this case, the waterproof film and the nonwoven fabric constitute a liquid-impervious back sheet) can be used after substantially impervious to liquid imperviousness by interposing a waterproof film.
  • those having moisture permeability tend to be used from the viewpoint of preventing stuffiness.
  • This water- and moisture-permeable sheet material is a microporous sheet obtained by forming a sheet by melting and kneading an inorganic filler in an olefin resin such as polyethylene or polypropylene, and then stretching in a uniaxial or biaxial direction. It is.
  • the liquid-permeable surface sheet 3 is preferably a porous or non-porous nonwoven fabric or a porous plastic sheet.
  • the material fibers constituting the nonwoven fabric include synthetic fibers such as polyethylene or polypropylene, synthetic fibers such as polyester and polyamide, recycled fibers such as rayon and cupra, and natural fibers such as cotton.
  • a nonwoven fabric obtained by an appropriate processing method such as a lace method, a spun bond method, a thermal bond method, a melt blown method, or a needle punch method can be used.
  • the spunlace method is excellent in terms of flexibility and the spunbond method is excellent in drapeability
  • the thermal bond method and the air-through method are excellent in terms of being bulky and having high compression recovery properties.
  • the non-woven fiber may be either a long fiber or a short fiber, but preferably a short fiber is used in order to give a towel texture.
  • an olefin fiber such as polyethylene or polypropylene having a relatively low melting point.
  • a composite fiber such as a core-sheath fiber, a side-by-side fiber, or a split fiber having a fiber having a high melting point as a core and a fiber having a low melting point as a sheath can be suitably used.
  • the liquid-permeable surface sheet 3 may not be provided when the upper layer sheet 10 of the polymer sheet 4 described in detail later forms a skin contact surface layer.
  • the polymer sheet 4 interposed between the liquid-impermeable back sheet 2 and the liquid-permeable surface sheet 3 is between the upper layer sheet 10 disposed on the skin side and the lower layer sheet 11 disposed on the non-skin side.
  • the superabsorbent polymer 12 is disposed on the surface.
  • a porous or non-porous nonwoven fabric or a porous plastic sheet is used as the upper layer sheet 10.
  • the raw material fibers constituting the nonwoven fabric in the same manner as the liquid-permeable surface sheet 3, for example, synthetic fibers such as olefins such as polyethylene or polypropylene, polyesters, and polyamides, recycled fibers such as rayon and cupra, cotton Natural fibers such as
  • the processing method of the said nonwoven fabric is not ask
  • the pore diameter of the porous plastic sheet is preferably smaller than the outer shape of the superabsorbent polymer 12 in order to prevent the superabsorbent polymer 12 from falling off.
  • the upper layer sheet 10 is preferably subjected to a predetermined uneven process, and therefore preferably includes a material having thermoplasticity.
  • the lower layer sheet 11 in addition to a porous or non-porous nonwoven fabric or a porous plastic sheet, a sheet material having a water shielding property can be used.
  • the processing method of the nonwoven fabric is not limited, but in order to prevent the superabsorbent polymer 12 from falling off, the fiber density of the obtained product such as the spunbond method, the melt blown method, the needle punch method is large. It is preferable to use the processing method.
  • the pore diameter of the porous plastic sheet is preferably smaller than the outer shape of the superabsorbent polymer 12 in order to prevent the superabsorbent polymer 12 from falling off.
  • the water-impervious sheet material the same material as the liquid-impermeable back sheet 2 can be used.
  • the superabsorbent polymer 12 examples include a cross-linked polyacrylate, a self-crosslinked polyacrylate, a saponified acrylate-vinyl acetate copolymer cross-linked product, and a cross-linked isobutylene / maleic anhydride copolymer.
  • a crosslinked polysulfonate, and a partially crosslinked water-swellable polymer such as polyethylene oxide and polyacrylamide.
  • those based on acrylic acid or acrylate that are excellent in water absorption and water absorption speed are preferred.
  • the water-absorbing force and the water-absorbing speed can be adjusted by adjusting the crosslinking density and the crosslinking density gradient.
  • side nonwoven fabrics 7 and 7 are provided on both side portions on the surface side of the sanitary napkin 1 along the longitudinal direction and over almost the entire length of the napkin 1, respectively.
  • Wing-like flaps W and W are formed by a part of the liquid-impervious back sheet 2 that extends laterally and also laterally.
  • a water-repellent treated nonwoven fabric or a hydrophilic treated nonwoven fabric can be used from the viewpoint of important functions. For example, if importance is placed on functions such as preventing permeation of menstrual blood or vaginal discharge, or enhancing the touch feeling, water repellent treatment coated with silicon, paraffin or alkylchromic chloride water repellent It is desirable to use a nonwoven fabric.
  • a method of polymerizing a compound having a hydrophilic group for example, an oxidation product of polyethylene glycol, in the process of producing a synthetic fiber, ,
  • a metal salt such as stannic chloride
  • partially dissolving the surface to make it porous and depositing metal hydroxides to swell or make the synthetic fiber porous, applying capillary action to make it hydrophilic
  • capillary action to make it hydrophilic It is desirable to use a hydrophilic treated non-woven fabric provided with.
  • the inner side of the side nonwoven fabric 7 folds the side nonwoven fabric 7 almost double, and inside the double sheet, in the middle in the height direction, as appropriate at both ends or in the longitudinal direction.
  • One or a plurality of, in the illustrated example, two thread-like elastic elastic members 8 and 8 are disposed, and the double sheet portion is erected on the skin side by the contraction force. Is formed.
  • the polymer sheet 4 includes an upper layer sheet 10 disposed on the skin side (liquid-permeable surface sheet 3 side) and a non-skin side (liquid-impermeable back sheet 2 side).
  • the superabsorbent polymer 12 is interposed in a predetermined region between the lower layer sheet 11 and the lower layer sheet 11.
  • the polymer sheet 4 is partitioned into a plurality of polymer-encapsulated cells 14, 14...
  • the superabsorbent polymer 12 is encapsulated by a first joint portion 13 that joins the upper layer sheet 10 and the lower layer sheet 11.
  • a polymer non-existing region 16 in which the superabsorbent polymer 12 is not interposed is formed at the center of each polymer-encapsulated cell 14 by a second joint 15 that joins the upper layer sheet 10 and the lower layer sheet 11.
  • the absence of the superabsorbent polymer 12 means that the superabsorbent polymer 12 does not exist between the upper layer sheet 10 and the lower layer sheet 11 or enters between the fibers when the superabsorbent polymer 12 is sprayed. This means that the amount of the water-absorbing polymer 12 is much smaller than that of the polymer-encapsulated cell 14 encapsulated in the polymer.
  • the bonding strength of the second bonding portion 15 is set to be smaller than the bonding strength of the first bonding portion 13, and is higher than that of the first bonding portion 13 when the superabsorbent polymer 12 absorbs liquid and swells.
  • the joint of the joint portion 15 is peeled off preferentially. That is, the bonding strength of the first bonding portion 13 is greater than the bonding strength of the second bonding portion 15.
  • FIG. 6 (A) in the polymer-encapsulated cell 14 according to the present invention, as shown in FIG. 6 (B), compared to the conventional cell partitioned by the surrounding joints, Since the polymer non-existing region 16 is formed by the second joint portion 15 at the center and is formed so as to surround the periphery of the polymer non-existing region 16, the movement of the superabsorbent polymer 12 in the polymer-encapsulated cell 14 is performed. And bias can be prevented.
  • the joined portion is joined by the pressure of the superabsorbent polymer swollen by absorbing liquid. Although peeled off, the superabsorbent polymer was also filled in the cell immediately adjacent to it, so there was no escape area for the swollen superabsorbent polymer, and gel blocking was likely to occur due to the superabsorbent polymer stagnating there.
  • the bonding of the second bonding portion 15 which is the bonding portion with the polymer non-existing region 16 where the superabsorbent polymer 12 does not exist is preferentially performed.
  • the space of the polymer-encapsulated cell 14 expands to the polymer non-existing region 16, and the swollen superabsorbent polymer 12 enters the non-polymeric region 16, and the superabsorbent polymer 12 easily swells accordingly. Become. Therefore, liquid absorption failure due to gel blocking or the like hardly occurs, and liquid absorption in the polymer-encapsulated cell 14 is efficiently performed.
  • first joint portion 13 and the second joint portion 15 it is preferable to use an adhesive means such as a hot melt adhesive, but it is also possible to use a fusion means such as heat seal or ultrasonic seal. Is possible.
  • an adhesive means such as a hot melt adhesive
  • a fusion means such as heat seal or ultrasonic seal. Is possible.
  • the adjustment of the bonding strength between the first bonding portion 13 and the second bonding portion 15 is performed by adjusting the coating amount per unit area and the length of the coating pattern when an adhesive means using an adhesive is used. In the case where a joining means by fusion is used, it can be performed by adjusting the fusion area or the fusion temperature.
  • the joint strength of the first joint portion 13 and the second joint portion 15 is such that the upper layer sheet 10 and the lower layer sheet 11 do not break when the superabsorbent polymer 12 absorbs liquid and swells, that is, the upper layer.
  • the strength is set to be smaller than the tensile strength of the sheet 10 and the lower layer sheet 11.
  • the bonding strength of the first bonding portion 13 is preferably about 0.5 to 2 N / 25 mm
  • the bonding strength of the second bonding portion 15 is preferably about 0.2 to 1 N / 25 mm. Further, it is preferable that the difference in bonding strength is 0.3 N / 25 mm or more.
  • the said joint strength can be measured from the tensile strength when the tensile test which pulls the sheet
  • the first joint portion 13 is a lattice-like pattern composed of a plurality of continuous longitudinal direction lines and width direction lines arranged at substantially equal intervals with respect to the upper layer sheet 10 and the lower layer sheet 11. It is a junction part.
  • each polymer-encapsulated cell 14 is partitioned into a rectangular shape, preferably a square shape.
  • those individually partitioned such as a circle, an ellipse, and a polygon may be independently arranged in a lattice shape or a zigzag shape.
  • the first joining portion 13 may be constituted by a continuous line obtained by continuously joining the upper layer sheet 10 and the lower layer sheet 11, or as shown in FIG. You may comprise by the intermittent line which has arrange
  • the length of the non-joined part is preferably shorter than the length of the joined part in order to prevent the superabsorbent polymer 12 from moving from the non-joined part.
  • the polymer-encapsulated cell 14 has an outer periphery surrounded by the first joint portion 13 between the upper layer sheet 10 and the lower layer sheet 11, and a polymer non-existing region 16 partitioned by the second joint portion 15 in the center portion. It is the arranged annular space.
  • each polymer-encapsulated cell 14 can be adjacently disposed with the first joint portion 13 as a boundary line without leaving a gap between adjacent polymer-encapsulated cells 14.
  • the highly water-absorbing polymer 12 is arranged with almost no gap with respect to the polymer sheet 4, and the liquid absorption effect can be enhanced.
  • each polymer-encapsulated cell 14 is surrounded by a separate independent first joint 13, and is arranged adjacent to each other with a gap 17 between the adjacent polymer-encapsulated cells 14. Good.
  • the gap 17 between the adjacent polymer-encapsulated cells 14, 14 becomes a buffer zone and the sheet is distorted. Is absorbed, and the entire polymer sheet 4 can be prevented from being distorted. If the width of the gap 17 is too small, the distortion of the sheet cannot be absorbed, and if it is too large, the liquid absorption effect is reduced. Therefore, the width is preferably about 10% to 30% of the width of the polymer-encapsulated cell 14.
  • the polymer non-existing region 16 defined by the second joint 15 can be formed in a (A) square shape, (B) rhombus, or (C) circular pattern.
  • the planar shape of the polymer non-existing region 16 is preferably formed to have a corner shape such as a square shape or a rhombus.
  • the polymer non-existing region 16 is provided in a predetermined size with respect to the polymer-encapsulated cell 14 so that a sufficiently expanded space is obtained when the superabsorbent polymer 12 absorbs liquid and swells.
  • the length of the outer shape of the polymer non-existing region 16 is preferably 20% to 50% with respect to the length of the outer shape of the polymer encapsulation cell 14.
  • the second joining portion 15 may join the entire region of the polymer non-existing region 16 or a plurality of dot-like shapes as shown in FIG.
  • the outer periphery of the polymer non-existing region 16 may be a continuous line or an intermittent line (in the illustrated example, an intermittent line). You may join.
  • region shown by FIG. 9 (B) with an intermittent line in the point of making the joining strength of the 2nd junction part 15 weak is preferable.
  • the polymer-encapsulated cell 14 is provided with a third joint 18 that extends from the polymer non-existing region 16 to the first joint 13 and joins the upper layer sheet 10 and the lower layer sheet 11. Accordingly, the polymer-encapsulated cell 14 may be divided into a plurality of parts. As a result, it is possible to prevent the highly water-absorbing polymer 12 before liquid absorption from moving and biasing in the polymer-encapsulated cell 14.
  • the third joint 18 is preferably provided so that the polymer-encapsulated cell 14 is divided into 2 to 8 equal parts, and in the illustrated example, 4 equal parts.
  • the bonding strength of the third bonding portion 18 is preferably set so as to be smaller than the bonding strength of the first bonding portion 13 and larger than the bonding strength of the second bonding portion 15. That is, it is preferable to set the bonding strength in the relationship of the first bonding portion 13> the third bonding portion 18> the second bonding portion 15. As a result, the joining becomes easy to peel in the order of the second joining part 15, the third joining part 18, and the first joining part 13, and the movement of the superabsorbent polymer 12 that has absorbed and swollen to the polymer non-existing region 16 is prevented. It will be done smoothly.
  • the bonding strength of the third bonding portion 18 is preferably about 0.4 to 1 N / 25 mm.
  • the said 3rd junction part 18 can be provided with a continuous line or an intermittent line (in the illustration example, an intermittent line).
  • the weight of the superabsorbent polymer 12 filled in the polymer-encapsulated cell 14 is 20 to 300 g / m 2 , preferably 80 to 200 g / m 2 .
  • the first embossing roll 21 in which a large number of concave portions 21b, 21b,... Corresponding to, and the large number of concave portions 22a, 22a, corresponding to the convex portion 21a are arranged and correspond to the concave portion 21b.
  • the superabsorbent polymer 12 is sprayed on the surface of the second embossing roll 22 on which the upper layer sheet 10 is arranged, and the superabsorbent polymer 12 is accommodated in the concave portion 22a corresponding to the polymer-encapsulated cell 14, and the first 2
  • the lower layer sheet 11 conveyed from another path in a stacked state between the embossing roll 22 and the flat roll 23
  • the upper layer sheet 10 and the upper layer sheet 10 are separated by the first bonding portion 13 and the second bonding portion 15.
  • the lower sheet 11 is joined and integrated.
  • joints are performed by applying a hot-melt adhesive or the like on the outer surface of the upper layer sheet 10 corresponding to the convex portion of the second embossing roll 22 and adhering to the lower layer sheet 11 or when meshing with the flat roll 23. This is performed by fusing the upper layer sheet 10 and the lower layer sheet 11 by heating or ultrasonic radiation of the convex portions of the second embossing roll 22.
  • the upper layer sheet 10 is easily sucked and embossed at the time of embossing, and at the time of spraying the superabsorbent polymer 12, the polymer is prevented from falling. can do.
  • the amount of the superabsorbent polymer 12 accommodated in the polymer-encapsulated cell 14 may be adjusted by leveling the surface with a scraper after the superabsorbent polymer 12 is sprayed.
  • the polymer sheets 4, 4... Continuous in the longitudinal direction are cut at the joint between the upper layer sheet 10 and the lower layer sheet 11 where the polymer-encapsulated cells 14 are not provided.
  • FIG. 12 (A) As another embodiment of the polymer non-existing region 16, as shown in FIG. 12 (A), a bulge on the skin side at a height lower than the polymer-encapsulated cell 14 at a position corresponding to the polymer non-existing region 16.
  • the convex part 16a to be formed is formed, and as shown in FIG. 12B, when the second joint part 15 is partially provided, the part corresponding to the second joint part 15 is formed to be depressed. It may be.
  • the superabsorbent polymer 12 absorbs liquid and swells, and the joint of the second joint portion 15 peels off, the upper layer sheet 10 is likely to bulge to the skin side, and the superabsorbent polymer 12 does not exist. It becomes easier to enter the region 16.
  • the superabsorbent polymer 12 is sprayed while sucking only the polymer-encapsulated cell 14 without sucking into this portion. Is preferred.
  • the polymer sheet 4 may be interposed between the liquid-permeable top sheet 3 and the liquid-impervious back sheet 2, or as shown in FIGS. 13 and 14.
  • you may interpose as a laminated body with the fiber assembly layer 30 containing a water-absorbing fiber assembly, such as a pulp arrange
  • the fiber assembly layer 30 is composed of at least a water-absorbing fiber assembly, and may contain a highly water-absorbing polymer.
  • the fiber assembly layer 30 is disposed on the non-skin side of the polymer sheet 4, and the laminate of the polymer sheet 4 and the fiber assembly layer 30 is formed as a liquid-permeable surface sheet 3 and a liquid-impermeable back sheet 2. It is interposed between. As a result, the body fluid that has passed through the upper polymer sheet 4 is absorbed and retained by the lower fiber assembly layer 30.
  • a water-permeable sheet material is preferably used as the lower layer sheet 11 constituting the polymer sheet 4.
  • the fiber assembly layer 30 is disposed on the skin side of the polymer sheet 4, and the laminate of the polymer sheet 4 and the fiber assembly layer 30 is formed as a liquid-permeable top sheet 3 and a liquid-impermeable back sheet 2. Between. Thereby, the body fluid diffused in the fiber assembly layer 30 can be quickly absorbed by the polymer sheet 4.
  • a slit 31 penetrating along the longitudinal direction may be provided at the center in the width direction of the fiber assembly layer 30.
  • the slit 31 acts as a temporary storage space for bodily fluid, and the bodily fluid can be diffused in the polymer sheet 4 while diffusing the bodily fluid along the slit 31 in the longitudinal direction.
  • the sheet 4 can be absorbed.
  • the polymer sheet 4 does not need to be disposed on the entire surface of the fiber assembly layer 30, for example, only in the napkin central region including the blood drainage port. It is possible to arrange them or to arrange them only in the annular region surrounding the blood drainage port. In this case, the fiber assembly layer 30 is disposed up to the outer peripheral portion of the sanitary napkin 1 leaving the outer peripheral flap portion.
  • the liquid-permeable surface sheet 3 is not necessarily an essential element.
  • the liquid-permeable surface sheet 3 is disposed. You don't have to. Thereby, the sanitary napkin 1 can be further reduced in thickness, and the cost can be reduced by reducing the number of materials.
  • SYMBOLS 1 Sanitary napkin, 2 ... Liquid impervious back sheet, 3 ... Liquid permeable top sheet, 4 ... Polymer sheet, 7 ... Side nonwoven fabric, 10 ... Upper layer sheet, 11 ... Lower layer sheet, 12 ... Super absorbent polymer, DESCRIPTION OF SYMBOLS 13 ... 1st junction part, 14 ... Polymer enclosure cell, 15 ... 2nd junction part, 16 ... Polymer non-existence area

Landscapes

  • Health & Medical Sciences (AREA)
  • Epidemiology (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Vascular Medicine (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Absorbent Articles And Supports Therefor (AREA)
PCT/JP2016/072280 2015-07-31 2016-07-29 吸収性物品 WO2017022655A1 (ja)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2015151813A JP6169656B2 (ja) 2015-07-31 2015-07-31 吸収性物品
JP2015-151813 2015-07-31

Publications (1)

Publication Number Publication Date
WO2017022655A1 true WO2017022655A1 (ja) 2017-02-09

Family

ID=57943060

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2016/072280 WO2017022655A1 (ja) 2015-07-31 2016-07-29 吸収性物品

Country Status (2)

Country Link
JP (1) JP6169656B2 (enrdf_load_stackoverflow)
WO (1) WO2017022655A1 (enrdf_load_stackoverflow)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11399990B2 (en) * 2017-03-21 2022-08-02 Daio Paper Corporation Absorbent pad

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6531197B1 (ja) 2018-03-30 2019-06-12 大王製紙株式会社 吸収性物品

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1995021596A1 (en) * 1994-02-11 1995-08-17 Minnesota Mining And Manufacturing Company Absorbent materials and preparation thereof
WO2014007043A1 (ja) * 2012-07-04 2014-01-09 株式会社瑞光 吸収性物品における超音波接合方法、吸収性物品の超音波接合装置および吸収性物品
JP2014500736A (ja) * 2010-10-20 2014-01-16 フィンカ ベーフェーベーアー 環境に優しい吸収性構造体

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1995021596A1 (en) * 1994-02-11 1995-08-17 Minnesota Mining And Manufacturing Company Absorbent materials and preparation thereof
JP2014500736A (ja) * 2010-10-20 2014-01-16 フィンカ ベーフェーベーアー 環境に優しい吸収性構造体
WO2014007043A1 (ja) * 2012-07-04 2014-01-09 株式会社瑞光 吸収性物品における超音波接合方法、吸収性物品の超音波接合装置および吸収性物品

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11399990B2 (en) * 2017-03-21 2022-08-02 Daio Paper Corporation Absorbent pad

Also Published As

Publication number Publication date
JP2017029353A (ja) 2017-02-09
JP6169656B2 (ja) 2017-07-26

Similar Documents

Publication Publication Date Title
JP6366565B2 (ja) 吸収性物品
JP6001713B2 (ja) 吸収性物品
EP3275414B1 (en) Absorbent article
JP2017104263A5 (enrdf_load_stackoverflow)
JP6360540B2 (ja) 吸収性物品
JP6047606B2 (ja) 吸収性物品
JP6382384B1 (ja) 吸収性物品
JP6484416B2 (ja) 吸収性物品
WO2018062388A1 (ja) 吸収性物品
JP6189399B2 (ja) 吸収性物品
JP2017093828A5 (enrdf_load_stackoverflow)
JP7157532B2 (ja) 吸収性物品
JP6158872B2 (ja) 吸収性物品
JP6169656B2 (ja) 吸収性物品
JP6207557B2 (ja) 吸収性物品
JP2017029353A5 (enrdf_load_stackoverflow)
JP6457764B2 (ja) 吸収性物品
US20220040010A1 (en) Absorbent article
JP6436960B2 (ja) 吸収性物品
JP6599116B2 (ja) 吸収性物品

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 16832934

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 16832934

Country of ref document: EP

Kind code of ref document: A1