WO2020195095A1 - Article à porter jetable attaché - Google Patents

Article à porter jetable attaché Download PDF

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Publication number
WO2020195095A1
WO2020195095A1 PCT/JP2020/002691 JP2020002691W WO2020195095A1 WO 2020195095 A1 WO2020195095 A1 WO 2020195095A1 JP 2020002691 W JP2020002691 W JP 2020002691W WO 2020195095 A1 WO2020195095 A1 WO 2020195095A1
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WO
WIPO (PCT)
Prior art keywords
woven fabric
sheet
target sheet
fine fibrous
fibrous cellulose
Prior art date
Application number
PCT/JP2020/002691
Other languages
English (en)
Japanese (ja)
Inventor
友記 岡田
勉 古川
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
Priority to CN202080018285.5A priority Critical patent/CN113507911A/zh
Publication of WO2020195095A1 publication Critical patent/WO2020195095A1/fr

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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00—Bandages or dressings; Absorbent pads
    • A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/56—Supporting or fastening means
    • 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
    • A61F13/56—Supporting or fastening means
    • A61F13/62—Mechanical fastening means, ; Fabric strip fastener elements, e.g. hook and loop

Definitions

  • the present invention relates to an articulated disposable wearable article such as a tape type disposable diaper.
  • a typical articulated disposable wear item has a crotch portion including the anterior-posterior center, a ventral portion extending anteriorly from the anterior-posterior center, and a dorsal portion extending posteriorly from the anterior-posterior center, at least the dorsal portion.
  • Has wing portions extending from the crotch portion on both the left and right sides in the width direction.
  • the wing portion has a connecting portion that is detachably connected to the outer surface of the ventral portion, and the outer surface of the ventral portion has a target portion to which the connecting portion is connected.
  • the wing portion is turned from both sides of the waist to the outer surface of the ventral portion, and the connecting portion of the wing portion is connected to the target portion.
  • Such an articulated disposable wear article is used not only for infants but also for long-term care (adult use) (see, for example, Patent Document 1).
  • the connecting portion of the connecting tape is more widely used than the one formed of the adhesive layer by the hook material (male material) of the mechanical fastener (hook-and-loop fastener).
  • a typical target portion in the former is a component called a target tape made of a plastic film fixed to the outer surface of the ventral portion.
  • a typical target portion in the latter is a base material made of a plastic film sewn with a thread, and a part called a target tape in which a loop is formed on the base material with the thread is fixed to the outer surface of the ventral portion. It is a thing. In this case, the protrusion of the hook material of the connecting tape is entangled with the loop of the target tape, so that the connecting tape is connected to the target portion.
  • the connecting portion is a hook material
  • the outer surface of the product is formed of a non-woven fabric (hereinafter referred to as an exterior non-woven fabric), and a target sheet such as a plastic sheet on which the connecting position is printed is placed adjacent to the inner surface of the exterior non-woven fabric.
  • a target sheet such as a plastic sheet on which the connecting position is printed
  • the target portion is formed by this.
  • the user can perform the connection by entwining the hook material of the connecting portion with the fibers of the exterior non-woven fabric at the position of the target sheet that is seen through the exterior non-woven fabric.
  • the main problem of the present invention is to reduce stuffiness in the region having the target sheet.
  • the articulated disposable wear articles that have solved the above problems are as follows. ⁇ First aspect> It has a crotch part including the center in the anterior-posterior direction, a ventral part extending anteriorly from the center in the anterior-posterior direction, and a dorsal part extending posteriorly from the center in the anterior-posterior direction.
  • the absorber built in the range including the crotch part and A liquid-permeable top sheet provided on the front side of the absorber and A breathable liquid-impermeable sheet provided on the back side of the absorber and It has an exterior non-woven fabric that covers the back side of the liquid-impermeable sheet and constitutes the outer surface of the product.
  • Both sides of the dorsal portion have connecting portions that are detachably connected to the outer surface of the ventral portion.
  • a target sheet is provided at a connecting position of the connecting portion in the ventral portion.
  • the portion of the ventral portion having the target sheet has a portion to which the fine fibrous cellulose aggregate is attached in a range in the thickness direction from the target sheet to the back surface of the liquid impermeable sheet.
  • the ventral portion does not have the microfibrous cellulose aggregate other than the portion having the target sheet.
  • the fine fibrous cellulose aggregate is capable of absorbing moisture located on the front side of the target sheet.
  • the fine fibrous cellulose aggregate has high hygroscopicity. Therefore, in this articulated disposable wearable article, stuffiness in the region having the target sheet can be reduced. Further, although the microfibrous cellulose aggregate is hard, in the present connection type disposable wear article, the microfibrous cellulose aggregate is covered with at least a liquid permeable sheet and a top sheet on the front side of the article, and the microfibrous cellulose aggregate thereof The adhesion area is also limited. Therefore, while using the fine fibrous cellulose aggregate as a hygroscopic material, it is possible to prevent stuffiness while suppressing the hardening of the wearer's touch.
  • the connecting portion is a hook material and
  • the target sheet is a non-woven fabric attached to the outer surface of the exterior non-woven fabric.
  • the fine fibrous cellulose aggregates are attached to the non-woven fabric of the target sheet, and the amount of the fine fibrous cellulose aggregates attached to the non-woven fabric of the target sheet decreases from the front side to the back side of the target sheet.
  • the connecting portion is a hook material and
  • the target sheet is a non-woven fabric attached to the outer surface of the exterior non-woven fabric.
  • the fine fibrous cellulose aggregate is attached to the non-woven fabric of the target sheet, and the attached portion of the fine fibrous cellulose aggregate does not have the fine fibrous cellulose aggregate exposed on the outer surface of the target sheet.
  • the connecting portion is a hook material and
  • the target sheet is a non-woven fabric attached to the outer surface of the exterior non-woven fabric.
  • thin-walled portions having dents on at least the inner surface are repeatedly formed at intervals, and the microfibrous cellulose aggregate is adhered to the thin-walled portions.
  • a ventilation gap is provided between the thin portion of the target sheet and the sheet adjacent to the inner surface of the target sheet.
  • FIG. 6 is a sectional view taken along line 6-6 of FIG. It is a cross-sectional view of line 7-7 of FIG. (A) is a sectional view taken along line 8-8 of FIG. 1, and (b) is a sectional view taken along line 9-9 of FIG.
  • FIG. 5 is a sectional view taken along line 5-5 of FIG. It is sectional drawing of the attachment part of the fine fibrous cellulose aggregate. It is a top view which shows the main part of the outer surface of a tape type disposable diaper.
  • FIG. 1 It is a top view which shows the main part of the outer surface of the tape type disposable diaper including a moisture absorption sheet. It is sectional drawing which shows the main part of the tape type disposable diaper of FIG. It is a top view in the unfolded state which shows the outer surface of a tape type disposable diaper.
  • (A) is an enlarged plan view of the target sheet
  • (b) is a cross-sectional view of a portion including the target sheet. It is an enlarged photograph of the attachment part of the fine fibrous cellulose aggregate. It is sectional drawing of the part including a target sheet.
  • the dotted pattern portion shows a hot melt adhesive as a joining means for joining the constituent members located on the front side and the back side thereof.
  • the hot melt adhesive can be applied by a known method such as slot coating, continuous linear or dotted bead coating, spiral or Z-shaped spray coating, or pattern coating (transfer of hot melt adhesive by the letterpress method). Can be applied.
  • a hot melt adhesive can be applied to the outer peripheral surface of the elastic member to fix the elastic member to the adjacent member.
  • hot melt adhesive examples include EVA type, adhesive rubber type (elastomer type), olefin type, polyester / polyamide type and the like, but they can be used without particular limitation.
  • a means by welding materials such as a heat seal and an ultrasonic seal can also be used.
  • This tape-type disposable diaper has a crotch portion including the center of the anterior-posterior LD, a ventral portion F extending anteriorly from the center of the anterior-posterior LD, and a dorsal portion B extending posteriorly from the center of the anterior-posterior LD. are doing.
  • this tape-type disposable diaper has an absorber 56 built in a range including the crotch portion, a liquid-permeable top sheet 30 that covers the front side of the absorber 56, and a liquid-impermeable material that covers the back side of the absorber 56. It has a sheet 11 and an exterior non-woven fabric 12 that covers the back side of the liquid-impermeable sheet and constitutes the outer surface of the product.
  • the absorber 56 is a portion that absorbs and retains the excrement liquid, and can be formed by an aggregate of fibers.
  • the fiber aggregate is a filament aggregate obtained by stacking short fibers such as cotton-like pulp and synthetic fibers, and opening tow (fiber bundle) of synthetic fibers such as cellulose acetate as necessary. Can also be used.
  • the fiber texture may be, for example, about 100 to 300 g / m 2 in the case of stacking cotton-like pulp or short fibers, and about 30 to 120 g / m 2 in the case of filament aggregates. Can be done.
  • the fineness is, for example, 1 to 16 dtex, preferably 1 to 10 dtex, and more preferably 1 to 5 dtex.
  • the filament may be a non-crimped fiber, but is preferably a crimped fiber.
  • the degree of crimping of the crimped fibers can be, for example, 5 to 75 fibers per 2.54 cm, preferably 10 to 50 fibers, and more preferably about 15 to 50 fibers.
  • uniformly crimped crimped fibers can be used.
  • the absorber 56 may contain high-absorbent polymer particles in part or all of the absorber 56.
  • the highly absorbent polymer particles include "powder” in addition to "particles".
  • the particle size of the highly absorbent polymer particles is not particularly limited, but for example, sieving (shaking for 5 minutes) using a standard sieve (JIS Z8801-1: 2006) of 500 ⁇ m, and particles falling under the sieve by this sieving.
  • the proportion of particles remaining on the 500 ⁇ m standard sieve is 30% by weight or less, and the 180 ⁇ m standard sieve. It is desirable that the proportion of particles remaining on the top is 60% by weight or more.
  • the material of the highly absorbent polymer particles can be used without particular limitation, but those having a water absorption of 40 g / g or more are preferable.
  • Highly absorbent polymer particles include starch-based, cellulose-based and synthetic polymer-based ones, which are starch-acrylic acid (salt) graft copolymers, saponified starch-acrylonitrile copolymers, and crosslinked sodium carboxymethyl cellulose.
  • a substance or an acrylic acid (salt) polymer or the like can be used.
  • As the shape of the highly absorbent polymer particles a powder or granular material that is usually used is preferable, but other shapes can also be used.
  • the highly absorbent polymer particles those having a water absorption rate of 70 seconds or less, particularly 40 seconds or less, are preferably used. If the water absorption rate is too slow, the liquid supplied into the absorber 56 tends to return to the outside of the absorber 56, so-called reversion.
  • the highly absorbent polymer particles those having a gel strength of 1000 Pa or more are preferably used. As a result, even when the bulky absorber 56 is used, the sticky feeling after liquid absorption can be effectively suppressed.
  • the amount of the highly absorbent polymer particles to be grained can be appropriately determined according to the amount of absorption required for the application of the absorber 56. Therefore, although it cannot be said unconditionally, it can usually be set to 50 to 350 g / m 2 .
  • the absorber 56 can be incorporated as an absorbing element 50 wrapped in the packaging sheet 58.
  • tissue paper particularly crepe paper, non-woven fabric, non-woven fabric of polylami, a sheet having small holes, or the like can be used.
  • a non-woven fabric is used instead of the crepe paper, a hydrophilic SMMS (spunbond / meltblown / meltblown / spunbond) non-woven fabric is particularly preferable, and polypropylene, polyethylene / polypropylene or the like can be used as the material.
  • the fiber texture is preferably 5 to 40 g / m 2 , especially 10 to 30 g / m 2 .
  • the packaging sheet 58 has a structure in which the entire absorber 56 is wrapped by one sheet, or may be a packaging sheet in which the entire absorber 56 may be wrapped by a plurality of sheets such as two upper and lower sheets. 58 may be omitted.
  • the top sheet 30 has liquid permeability, and for example, a perforated or non-perforated non-woven fabric, a porous plastic sheet, or the like can be used.
  • the top sheet 30 extends from the front end to the rear end of the product in the front-rear direction and extends laterally from the absorber 56 in the width direction WD.
  • the starting point of the rising gather 60 described later is more than the side edge of the absorber 56. If it is located on the center side in the width direction, the width of the top sheet 30 can be made shorter than the total width of the absorber 56 as necessary, and appropriate deformation is possible.
  • An intermediate sheet (also referred to as a "second sheet") 40 can be provided on the back side of the top sheet 30 in order to prevent the liquid that has permeated the top sheet 30 from returning.
  • the intermediate sheet 40 may be omitted.
  • the intermediate sheet 40 various non-woven fabrics can be preferably used, and a particularly bulky air-through non-woven fabric can be preferably used. It is preferable to use a composite fiber having a core-sheath structure for the air-through non-woven fabric.
  • the resin used for the core may be polypropylene (PP), but polyester (PET) having high rigidity is preferable.
  • Basis weight is preferably 17 ⁇ 80g / m 2, more preferably 25 ⁇ 60g / m 2.
  • the thickness of the raw material fiber of the non-woven fabric is preferably 2.0 to 10 dtex.
  • eccentric fibers having no core in the center, hollow fibers, and eccentric and hollow fibers as mixed fibers of all or a part of the raw material fibers.
  • the intermediate sheet 40 in the illustrated example is arranged in the center shorter than the width of the absorber 56, it may be provided over the entire width. Further, the intermediate sheet 40 may be provided over the entire length of the diaper, but may be provided only in the intermediate portion including the excretion position as shown in the illustrated example.
  • the liquid-impermeable sheet 11 is not particularly limited, but preferably has moisture permeability.
  • the liquid-impermeable sheet 11 is microporous obtained by kneading an inorganic filler in an olefin resin such as polyethylene or polypropylene, forming the sheet, and then stretching the sheet in the uniaxial or biaxial direction.
  • the sheet can be preferably used.
  • a non-woven fabric as a base material with improved waterproofness can also be used as the liquid-impermeable sheet 11.
  • liquid-impermeable sheet 11 extends in the same or wider range as the absorber 56 in the front-rear direction LD and the width direction WD, but if necessary, such as when other water-impervious means are present. It is also possible to have a structure that does not cover the end portion of the absorber 56 in the front-rear direction LD and the width direction WD.
  • the exterior non-woven fabric 12 covers the entire back side of the liquid-impermeable sheet 11 and gives the outer surface of the product a cloth-like appearance.
  • the non-woven fabric can be used alone or in layers. In the latter case, it is preferable to bond the non-woven fabrics to each other with a hot melt adhesive or the like.
  • the constituent fibers have a fineness of 1.6 to 2.3 dtex, a texture of 15 to 25 g / m 2 , and a thickness of 0.3 to 0.8 mm.
  • rising gathers 60 that stand up on the skin side of the wearer are provided on both sides of the surface widthwise WD. Is preferable. Of course, the rising gather 60 can be omitted.
  • the rising gather 60 of the illustrated example is composed of a gather sheet 62 substantially continuous in the width direction WD and an elongated gather elastic member 63 fixed to the gather sheet 62 in an extended state along the front-rear direction LD. ing.
  • a water-repellent non-woven fabric can be used as the gather sheet 62, and a rubber thread or the like can be used as the gather elastic member 63.
  • a plurality of elastic members may be provided, and one elastic member may be provided.
  • the inner surface of the gather sheet 62 has a joint start end in the width direction on the side portion of the top sheet 30, and the portion outside the width direction from the joint start end is the inner surface of each side flap portion SF, that is, liquid opaque in the illustrated example. It is bonded to the side portion of the sex sheet 11 and the side portion of the exterior nonwoven fabric 12 located outside in the width direction by a hot melt adhesive or the like.
  • the inside of the rising gather 60 in the width direction from the joint start end is fixed on the top sheet 30 at both ends in the front-rear direction of the product, but the part between them is a non-fixed free part, and this free part is It rises due to the contraction force of the elastic member 63 and comes into close contact with the body surface.
  • the tape-type disposable diaper of the illustrated example has a pair of end flaps EF having no absorber 56 extending to the front side and the rear side of the absorber 56, respectively, and lateral to both side edges of the absorber 56.
  • Each has a pair of side flap portions SF that do not have an absorber 56 and extend.
  • the side flap portion SF may be made of a material (exterior nonwoven fabric 12 or the like) continuous from the portion having the absorber 56, or may be formed by attaching another material.
  • a side elastic member 64 made of an elongated elastic member such as rubber thread is fixed to each side flap portion SF in a state of being extended along the front-rear direction LD, whereby the leg circumference portion of each side flap portion SF is fixed. Is configured as a plane gather.
  • the leg circumference elastic member 64 is provided between the gather sheet 62 and the liquid-impermeable sheet 11 on the outer side in the width direction near the joint start end in the joint portion of the gather sheet 62, and also has a side flap portion. It can also be provided between the liquid-impermeable sheet 11 and the exterior non-woven fabric 12 in SF.
  • a plurality of elastic members 64 around the legs may be provided on each side as shown in the illustrated example, or only one elastic member 64 may be provided on each side.
  • the flat gather is a portion on which the contraction force of the side elastic member 64 acts (the portion in which the side elastic member 64 is shown). Therefore, in addition to the form in which the side elastic member 64 exists only in the flat gathered portion, the side elastic member 64 exists on the front side, the rear side, or both sides of the flat gathered portion, but the side elastic member 64 exists in other than the flat gathered portion. When the member is finely cut in one place or many places, is not fixed to the sheet sandwiching the side elastic member 64, or both, the contraction force acts on the parts other than the flat gather. It also includes a structure in which the contractile force of the side elastic member 64 acts only on the flat gathered portion (substantially equivalent to not providing the elastic member).
  • the dorsal side portion B has a wing portion WP extending outward from the crotch portion M in the width direction WD.
  • the ventral portion F also has a wing portion WP extending outward of the WD in the width direction from the crotch portion M.
  • These wing portion WPs can also be formed by a member different from the other portions.
  • the concave shape from the side edge of the crotch portion M to the lower edge 71 of the wing portion by cutting the middle of the LD in the front-rear direction at the side portion of the side flap portion SF. It is preferable that the edge 70 is formed and the wing portion WP is formed as a result because it is easy to manufacture.
  • the wing portion WP in the dorsal portion B is provided with a connecting tape 80 that is detachably connected to the outer surface of the ventral portion F, respectively.
  • the connecting tape 80 is turned from both sides of the waist to the outer surface of the ventral portion F, and the connecting portion 83 of the connecting tape 80 is connected to an appropriate position on the outer surface of the ventral portion F.
  • the connecting tape 80 includes a base end portion 81 fixed to the wing portion WP, a sheet base material 80S forming a main body portion 82 extending from the base end portion 81, and the sheet base material 80S. It has a connecting portion 83 with respect to the ventral portion F provided in the middle portion of the main body portion 82 in the width direction WD.
  • the base end 81 side of the connecting portion 83 is a non-connecting portion 84 that is not connected to the ventral portion F, and the opposite side is a knob portion 85.
  • the non-connecting portion 84 and the knob portion 85 are composed of only the sheet base material 80S forming the main body portion 82.
  • the connecting portion 83 is made of a hook material (male material) of a mechanical fastener (face fastener).
  • the hook material has a large number of engaging protrusions on its connecting surface, and the shapes of the engaging protrusions are (A) -shaped, (B) J-shaped, (C) mushroom-shaped, and (D).
  • a non-woven fabric, a plastic film, a polylace non-woven fabric, paper or a composite material thereof can be used, but the fineness is 1.0 to 3.5 dtex.
  • a spunbonded non-woven fabric, an air-through non-woven fabric, or a spunlaced non-woven fabric having a texture of 60 to 100 g / m 2 and a thickness of 1 mm or less is preferable.
  • connecting portion 83 of the illustrated example is provided on the sheet base material 80S of the connecting tape 80 protruding from the wing portion WP, it may be provided directly on the wing portion WP.
  • a target sheet 20 is provided at a connecting portion of the connecting tape 80 in the ventral portion F.
  • the material of the target sheet 20 is not particularly limited, but when the connecting portion 83 is a hook material, for example, a long-fiber non-woven fabric in which fibers are partially welded to each other by ultrasonic welding of an intermittent pattern may be used. it can.
  • the long-fiber non-woven fabric is preferably a non-woven fabric having a fineness of 5 to 10 dtex, a texture of 25 to 40 g / m 2 , and a thickness of 0.3 to 0.8 mm.
  • a target sheet 20 having a large number of loop threads provided on the surface of a base material made of a plastic film or a non-woven fabric in which the engaging protrusions of the hook material are entangled can be used. ..
  • a specific example of this is a composite sheet material in which loop pile fiber threads are sewn on at least the outer surface of the base material.
  • loop pile fiber threads are projected on the outer surface of the base material, that is, the outer surface side of the disposable diaper at intervals in the weft direction, and the pile fiber threads are projected on the back side (wearer side) of the base material.
  • the pile fiber threads are projected on the back side (wearer side) of the base material.
  • the connecting portion 83 is a hook material and the connecting portion of the connecting tape 80 on the ventral side portion F is made of the non-woven fabric 21 (for example, when the exterior non-woven fabric 12 is provided as shown in the illustrated example), the inside of the exterior non-woven fabric 12 A target sheet 20 such as a plastic sheet, paper, or a non-woven fabric 21 on which the connection position of the scale 29 or the like is printed can be arranged.
  • the user can perform the connection by entwining the hook material of the connecting portion 83 with the fibers of the exterior nonwoven fabric 12 at the position of the target sheet 20 which is seen through the exterior nonwoven fabric 12.
  • the scale 29 is a mark indicating the position of the WD in the width direction
  • a plurality of linear marks along the LD in the front-rear direction are provided in the WD in the width direction at predetermined intervals, and FIGS. 11 and 12 (a).
  • a plurality of Arabic numbers are provided in the width direction WD at a predetermined interval
  • a plurality of signs having an appropriate shape such as an arrow or a triangle, which are not shown, are provided in the width direction WD at a predetermined interval. , Or a combination thereof.
  • the target sheet 20 can be a plastic film having a smooth surface and having a peeling treatment.
  • the portion of the ventral portion F having the target sheet 20 has the attachment portion 23 of the fine fibrous cellulose aggregate 22 in the range in the thickness direction from the target sheet 20 to the back surface of the liquid impermeable sheet 11.
  • the fine fibrous cellulose aggregate 22 is capable of absorbing moisture located on the front side of the target sheet 20.
  • at least the ventral portion F does not have the fine fibrous cellulose aggregate 22 other than the portion having the target sheet 20.
  • the fine fibrous cellulose aggregate 22 has high hygroscopicity. Therefore, in this articulated disposable wearable article, stuffiness in the region having the target sheet 20 can be reduced.
  • the fine fibrous cellulose aggregate 22 is hard, in the present connection type disposable wear article, the fine fibrous cellulose aggregate 22 is covered with at least a liquid-impermeable sheet 11 and a top sheet 30 on the front side of the article. At the same time, the adhesion area is also limited. Therefore, while using the fine fibrous cellulose aggregate 22 as a hygroscopic material, it is possible to prevent stuffiness while suppressing the hardening of the wearer's touch. Further, as shown in FIG. 8B, it is preferable not to have the fine fibrous cellulose aggregate 22 other than the portion overlapping with the absorber 56 because the hardening of the wearer's touch can be further suppressed.
  • the fine fibrous cellulose aggregate 22 is attached to the target sheet 20 itself as shown in the examples shown in FIGS. 2, 7, 8, 11 and 12, and is also attached to the target as shown in FIGS. 9 and 10. It can also be provided on another member at a portion overlapping the sheet 20. As another member in the latter case, when the target sheet 20 is attached to the outer surface of the exterior nonwoven fabric 12, the exterior nonwoven fabric 12 or the liquid-impermeable sheet 11 can be used, and the target sheet 20 is the exterior. When sandwiched between the non-woven fabric 12 and the liquid-impermeable sheet 11, the liquid-impermeable sheet 11 can be used. In addition, as shown in FIGS. 9 and 10, a dedicated moisture-absorbing sheet 15 to which the fine fibrous cellulose aggregate 22 is attached may be interposed between the target sheet 20 and the liquid-impermeable sheet 11. .
  • a known method such as forming the adhesion portion 23 of the fine fibrous cellulose aggregate 22 by applying a fine fibrous cellulose dispersion liquid dispersed in a dispersion liquid such as water to a member to be adhered such as a non-woven fabric and drying it.
  • a member to be adhered such as a non-woven fabric and drying it.
  • the concentration (mass / volume) of the fine fibrous cellulose dispersion may be 0.1 to 10%. It is preferably 1.0 to 5.0%, more preferably 1.5 to 3.0%, and particularly preferably 1.5 to 3.0%.
  • the B-type viscosity (60 rpm, 20 ° C.) of the fine fibrous cellulose dispersion is, for example, 700 cps or less, preferably 200 cps or less, and more preferably 50 cps or less.
  • a transfer method such as a letterpress method can be used to apply the fine fibrous cellulose dispersion.
  • Pulp fibers that can be used for producing fine fibrous cellulose include chemical pulps such as broadleaf pulp (LBKP) and coniferous pulp (NBKP), bleached thermomechanical pulp (BTMP), stone ground pulp (SGP), and pressurized stone ground.
  • chemical pulps such as broadleaf pulp (LBKP) and coniferous pulp (NBKP), bleached thermomechanical pulp (BTMP), stone ground pulp (SGP), and pressurized stone ground.
  • Pulp Pulp
  • RGP Refiner Gland Pulp
  • CGP ChemiGrand Pulp
  • TGP Gland Pulp
  • TMP Gland Pulp
  • CMP Chemithermo Mechanical Pulp
  • RMP Refiner Mechanical Pulp From machine pulp such as (RMP), brown waste paper, kraft envelope blind paper, magazine waste paper, newspaper waste paper, leaflet waste paper, office waste paper, cardboard waste paper, top white waste paper, Kent waste paper, imitation waste paper, ground ticket waste paper, sashimi waste paper, etc.
  • DIP deinked pulp
  • these may be used alone or in combination of a plurality of types as long as the desired effect is not impaired.
  • DIP deinked pulp obtained by deinking waste paper pulp.
  • Examples of the method for producing fine fibrous cellulose include mechanical methods such as a high-pressure homogenizer method, a microfluidizer method, a grinder grinding method, a bead mill freeze pulverization method, and an ultrasonic defibration method, but the method is limited to these methods. It's not a thing. Further, nanofiber formation is promoted by a combination of TEMPO oxidation treatment, phosphoric acid esterification treatment, acid treatment and the like.
  • the attachment portion 23 of the fine fibrous cellulose aggregate 22 may be provided in any pattern as long as it has the target sheet 20.
  • the attachment portion 23 of the fine fibrous cellulose aggregate 22 may be provided in a continuous surface shape over the entire or most of the portion having the target sheet 20.
  • the attachment portion 23 of the fine fibrous cellulose aggregate 22 is spaced apart from each other in the front-rear direction LD, the width direction WD, or the diagonal direction inclined with respect to these. It is preferable that they are arranged in a repeating pattern. For example, as shown in FIG.
  • the attachment portions 23 of the dot-shaped microfibrous cellulose aggregates 22 having a circular shape or a polygonal shape are arranged in a staggered manner (illustrated example), arranged in a matrix (not shown), or the like. It can also be provided in dots.
  • the attachment portion 23 of the fine fibrous cellulose aggregate 22 may be arranged in a horizontal stripe pattern in which a plurality of linear attachment portions 23 along the width direction WD are arranged at intervals in the front-rear direction LD. As shown in FIG. 8A, a plurality of linear attachment portions 23 along the front-rear direction LD may be arranged in a vertical stripe pattern at intervals in the width direction WD. Further, although not shown, the attachment portion 23 of the fine fibrous cellulose aggregate 22 is a linear fine fibrous shape along the attachment portion 23 of the linear fine fibrous cellulose aggregate 22 along the front-rear direction LD and the width direction WD.
  • the attachment portion 23 of the fine fibrous cellulose aggregate 22 is continuously connected in a linear shape, it can be continuously continuous in a linear shape or in a curved or wavy shape.
  • the size of the attachment portion 23 of the fine fibrous cellulose aggregate 22 can be appropriately determined.
  • the diameter 23d (the length of the longest portion) of the attachment portion 23 of the fine fibrous cellulose aggregate 22 is 1.0 to 4.0 mm, particularly. It is preferably 2.0 to 3.0 mm, and the center (or center of gravity) spacing x1 and y1 of the rows adjacent to the WD in the width direction and the LD in the front-rear direction are preferably 5 to 25 mm, particularly preferably 15 to 10 mm.
  • the line width 23w of the attachment portion 23 of the fine fibrous cellulose aggregate 22 is 1.0 to 4.0 mm, particularly 2.
  • the distance is preferably 0 to 3.0 mm, and the distance x2 and y2 of the adjacent bonding portions 23 is preferably 5 to 30 mm, particularly preferably 10 to 20 mm.
  • the line width of the attachment portion 23 of the fine fibrous cellulose aggregate 22 is 1.0 to 4.0 mm, particularly 2.0 to 2.0 to It is preferably 3.0 mm, and the lattice spacing (distance between the attachment portions 23 of the parallel microfibrous cellulose aggregates 22) is preferably 5 to 30 mm, particularly preferably 10 to 20 mm.
  • the material to which the fine fibrous cellulose aggregate 22 is attached is not particularly limited and may be a resin film or the like, but the non-woven fabric 21 is preferable from the viewpoint of flexibility and breathability.
  • the target sheet 20 is a non-woven fabric 21
  • the fine fibrous cellulose aggregate 22 is attached to the non-woven fabric 21 as shown in FIG.
  • the target sheet 20 is attached to the outer surface of the exterior non-woven fabric 12 and the hook material of the connecting portion 83 is entwined with the fibers of the non-woven fabric 21 to be connected
  • the non-woven fabric is attached to the adhering portion 23 of the fine fibrous cellulose aggregate 22.
  • the constituent fibers of 21 are bonded to each other via the fine fibrous cellulose aggregate 22, the fibers are less likely to be pulled out even if the hook material is attached or detached many times, and fluffing is less likely to occur, which is preferable.
  • the adhesion portion 23 of the fine fibrous cellulose aggregate 22 is formed by applying the fine fibrous cellulose dispersion liquid to the non-woven fabric 21, the fine fibrous cellulose dispersion liquid permeates between the fibers of the non-woven fabric 21, and after drying, The fine fibrous cellulose aggregate 22 firmly adheres to the surface of each fiber, and the fibers are firmly bonded to each other via the fine fibrous cellulose aggregate 22 at the intersections and proximity portions of the constituent fibers of the non-woven fabric 21.
  • the adhesive portion 23 continuous in the direction intersecting the orientation direction of the fibers of the non-woven fabric 21 of the target sheet 20 is targeted in the orientation direction of the fibers of the non-woven fabric 21 of the target sheet 20.
  • the non-woven fabric 21 of the sheet 20 has a striped pattern shorter than the fiber length and arranged at intervals of 5 mm or more.
  • the direction of fiber orientation of the non-woven fabric 21 of the target sheet 20 is the anteroposterior direction LD, and the attachment portion 23 of the fine fibrous cellulose aggregate 22 is formed in a horizontal stripe pattern. Then, the distance y2 of the LDs in the front-rear direction of the adjacent adhesive portions 23 can be shorter than the fiber length of the exterior nonwoven fabric 12 and 5 mm or more.
  • FIG. 7 (c) shows. As shown, it may be attached to only a part in the thickness direction, it may be attached to all of the thickness direction as shown in FIGS. 7 (a), (b) and (d), or these may be mixed. .. Further, even if the amount of the fine fibrous cellulose aggregate 22 adhered is constant in the thickness direction of the nonwoven fabric 21 as shown in FIG. 7A, as shown in FIGS. 7B, 7C and 7D. It may be changing or a mixture of these.
  • the fine fibrous cellulose aggregate 22 may be coated on the entire circumferential direction of each fiber, or the fine fibrous cellulose is indicated by a white arrow in FIG. As shown in the aggregate 22, it is not necessary that the fibers adhere to the coated side F1 in large amounts and not to the non-coated side F2 in large amounts. Further, as shown in FIG. 13, the fine fibrous cellulose aggregate 22 may be attached substantially continuously along the continuous direction of the fibers, or may be sparsely attached in the continuous direction of the fibers. It is preferable that the number of the fine fibrous cellulose aggregates 22 that do not bond the fibers to each other is small because the non-woven fabric 21 becomes flexible.
  • the target sheet 20 itself is a non-woven fabric 21, and when the fine fibrous cellulose aggregate 22 is attached thereto, the number of members is increased. It is possible to reduce stuffiness in the region having the target sheet 20. However, in this case, since the fine fibrous cellulose aggregate 22 is hard, it affects the touch of the outer surface of the target sheet 20. Therefore, it is preferable that the amount of the fine fibrous cellulose aggregate 22 adhered decreases from the front side to the back side as shown in FIGS. 7 (b) and 7 (c).
  • the attachment portion 23 of the fine fibrous cellulose aggregate 22 does not have the fine fibrous cellulose aggregate 22 exposed on the surface of the non-woven fabric 21 of the target sheet 20 as shown in FIG. 7 (c).
  • the uneven distribution of the fine fibrous cellulose aggregate 22 in the thickness direction and the change in the amount of adhesion are determined by whether the fine fibrous cellulose dispersion is applied from the front or back of the non-woven fabric 21, and the amount of application and the degree of permeability. Can be achieved by selecting.
  • the adhering portion 23 of the fine fibrous cellulose aggregate 22 shown in FIGS. 7 (b) and 7 (c) can be formed by applying an appropriate amount of the fine fibrous cellulose dispersion liquid to the back surface of the nonwoven fabric 21, and FIG.
  • the adhering portion 23 of the fine fibrous cellulose aggregate 22 shown in (d) can be formed by applying an appropriate amount of the fine fibrous cellulose dispersion liquid to the surface of the non-woven fabric 21.
  • the content of microfibrillated cellulose in the attachment portion 23 of the microfibrous cellulose assembly 22 is preferably to be 2 ⁇ 7g / m 2 approximately, and more preferably particularly in 2 ⁇ 5g / m 2 approximately.
  • the adhering portion 23 of the fine fibrous cellulose aggregate 22 is colored in a color different from that of the member to be adhered and the member located on the outer surface side thereof (for example, the target sheet 20), the range of the target sheet 20 can be easily visually recognized. it can. Further, by forming the colored attachment portion 23 in a scale shape (for example, FIG. 8A), it is possible to use it as a guide for the connection position of the connection portion 83.
  • a colored adhesive portion 23 can be formed by adding a coloring agent such as a dye to the dispersion liquid of the fine fibrous cellulose.
  • the target sheet 20 is a non-woven fabric 21 attached to the outer surface of the exterior non-woven fabric 12, and is a case where the hook material of the connecting portion 83 is entwined with the fibers of the non-woven fabric 21 and connected to the non-woven fabric 21 of the target sheet 20.
  • the fibrous cellulose aggregate 22 is attached, the structure shown in FIG. 14 is also preferable. That is, in this structure, in the target sheet 20, at least the thin-walled portions 22t having dents on the inner surface are repeatedly formed at intervals, and the fine fibrous cellulose aggregate 22 is attached to the thin-walled portions 22t, so that the target A ventilation gap 18 is formed between the thin portion 22t of the sheet 20 and the sheet adjacent to the inner surface of the target sheet 20.
  • the pattern of the thin-walled portion 22t can be, for example, the same as the pattern of the attachment portion 23 of the fine fibrous cellulose aggregate 22 described above. Further, the size of the thin-walled portion 22t can be the same as or less than or larger than the size of the attachment portion 23 of the above-mentioned fine fibrous cellulose aggregate 22.
  • the thin portion 22t may have dents on both the inner and outer sides of the target sheet 20 as shown in the illustrated example, or may have dents only on the inner surface of the target sheet 20.
  • the thin-walled portion 22t is formed on the non-woven fabric 21 to be the target sheet 20 by embossing, or the fine fibrous cellulose aggregate 22 is attached to the thin-walled portion 22t thereafter.
  • such a target sheet 20 can be manufactured by the following method. That is, when the dispersion liquid of the fine fibrous cellulose is applied to the non-woven fabric 21 to be the target sheet 20 in a pattern repeated at intervals, the dispersion liquid permeates between the fibers of the non-woven fabric 21. Then, when this is dried, a thin-walled portion 22t is formed in the coated portion of the dispersion liquid, and a fine fibrous cellulose aggregate 22 is formed in the thin-walled portion 22t.
  • the target sheet 20 can be formed only by applying the dispersion liquid of fine fibrous cellulose to the non-woven fabric 21 to be the target sheet 20 in a desired pattern and drying it.
  • Non-woven fabric As the non-woven fabric in the above description, a known non-woven fabric can be appropriately used depending on the site and purpose.
  • the constituent fibers of the non-woven fabric include olefin-based fibers such as polyethylene and polypropylene, polyester-based and polyamide-based synthetic fibers (including single-component fibers and composite fibers such as core sheaths), as well as recycled rayon and cupra. Fibers, natural fibers such as cotton, and the like can be selected without particular limitation, and these can be mixed and used. In order to increase the flexibility of the non-woven fabric, it is preferable that the constituent fibers are crimped fibers.
  • the constituent fibers of the non-woven fabric are hydrophilic fibers (including hydrophobic fibers made hydrophilic by the hydrophilic agent), they are either hydrophobic fibers or water-repellent fibers (water-repellent fibers made water-repellent by the water-repellent agent). It may be (including aqueous fibers).
  • the non-woven fabric generally has a short fiber non-woven fabric, a long fiber non-woven fabric, a spunbond non-woven fabric, a melt blown non-woven fabric, a spunlace non-woven fabric, a thermal bond (air-through) non-woven fabric, and a needle punch depending on the fiber length, the sheet forming method, the fiber bonding method, and the laminated structure.
  • non-woven fabrics It is classified into non-woven fabrics, point-bonded non-woven fabrics, laminated non-woven fabrics (SMS non-woven fabrics having a melt blown layer sandwiched between spunbond layers, SMMS non-woven fabrics, etc.), and any of these non-woven fabrics can be used.
  • the non-woven fabric 21 of the target portion 20 is a non-woven fabric 21 of hydrophilic fibers because the fine fibrous cellulose aggregate 22 adheres to the fibers of the non-woven fabric 21 with less interruption, thinner and more uniformly.
  • the "front-back direction” means the direction indicated by the symbol LD in the figure (vertical direction)
  • the "width direction” means the direction indicated by WD (horizontal direction) in the figure, and the front-back direction and the width direction. Are orthogonal.
  • the "MD direction” and "CD direction” mean the flow direction (MD direction) in the manufacturing equipment and the lateral direction (CD direction) orthogonal to this, and one of them is the front-rear direction depending on the part of the product. And the other is in the width direction.
  • the MD direction of the non-woven fabric is the direction of fiber orientation of the non-woven fabric.
  • the fiber orientation is the direction along which the fibers of the non-woven fabric follow. For example, the measurement method according to the fiber orientation test method based on the zero-distance tensile strength of the TAPPI standard method T481 or the fibers based on the tensile strength ratio in the front-rear direction and the width direction. It can be discriminated by a simple measuring method for determining the orientation direction.
  • the "front surface” means the surface of the member that is closer to the wearer's skin when worn, and the “back surface” means the surface of the member that is farther from the wearer's skin when worn. ..
  • Elongation rate means the value when the natural length is 100%. For example, an elongation rate of 200% is synonymous with an elongation ratio of 2 times.
  • ⁇ "Graining" is measured as follows. After pre-drying the sample or test piece, leave it in a test room or device under standard conditions (test location: temperature 23 ⁇ 1 ° C., relative humidity 50 ⁇ 2%) to bring it to a constant weight. Pre-drying refers to constant weight of a sample or test piece in an environment at a temperature of 100 ° C. It is not necessary to pre-dry the fibers having an official moisture content of 0.0%. A sample having a size of 100 mm ⁇ 100 mm is cut out from the test piece in a constant weight state using a sampling template (100 mm ⁇ 100 mm). The weight of the sample is measured and multiplied by 100 to calculate the weight per square meter, which is used as the index.
  • the "thickness" is automatically measured using an automatic thickness measuring device (KES-G5 handy compression measurement program) under the conditions of a load of 0.098 N / cm 2 and a pressurized area of 2 cm 2 .
  • the thickness of the perforated non-woven fabric is measured at a portion other than the holes and the protruding portion around them.
  • the water absorption amount is measured by JIS K7223-1996 "Water absorption amount test method for highly water-absorbent resin".
  • the water absorption rate shall be the "time to the end point" when JIS K7224-1996 "Water absorption rate test method for superabsorbent polymer" was performed using 2 g of superabsorbent polymer and 50 g of physiological saline. ..
  • Microfibrous cellulose refers to fine cellulose fibers taken out from plants such as pulp or bundles thereof, and generally refers to fibrous cellulose having an average fiber width of nano size (1 to 1000 nm or less), and is an average fiber. Those having a width (median diameter) of 100 nm or less (generally called cellulose nanofibrils (CNF)) are preferable, and those having a width (median diameter) of 10 to 60 nm are particularly preferable.
  • CNF cellulose nanofibrils
  • the "average fiber width" of fine fibrous cellulose can be measured by the following method. That is, first, 100 ml of an aqueous dispersion of fine fibrous cellulose having a solid content concentration of 0.01 to 0.1% by mass is filtered through a membrane filter made of Teflon (registered trademark), once with 100 ml of ethanol, and with 20 ml of t-butanol. Replace with solvent 3 times. Next, it is freeze-dried and coated with osmium to prepare a sample. This sample is observed by an electron microscope SEM image at a magnification of 5000 times, 10000 times, or 30000 times (in this example, a magnification of 30000 times) depending on the width of the constituent fibers.
  • the direction of fiber orientation of the non-woven fabric is the direction along which the fibers of the non-woven fabric follow.
  • a measurement method based on the fiber orientation test method based on the zero-distance tensile strength of the TAPPI standard method T481, or the front-back direction and the width direction It can be discriminated by a simple measuring method for determining the fiber orientation direction from the tensile strength ratio.
  • Expanded state means a state in which it is deployed flat without shrinkage or slack.
  • the dimensions of each part mean the dimensions in the unfolded state, not in the natural length state.
  • test or measurement shall be performed in a test room or equipment under standard conditions (test location: temperature 23 ⁇ 1 ° C, relative humidity 50 ⁇ 2%). To do.
  • the present invention can be applied to a connected disposable disposable item such as the tape-type disposable diaper in the above example.

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  • Health & Medical Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Vascular Medicine (AREA)
  • Epidemiology (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Mechanical Engineering (AREA)
  • Absorbent Articles And Supports Therefor (AREA)

Abstract

Le problème décrit par la présente invention est de réduire l'accumulation de sueur dans une région dotée d'une feuille cible. Le problème peut être résolu par un article à porter jetable attaché caractérisé en ce qu'une partie dotée d'une feuille cible 20 dans une partie ventrale F possède une partie de fixation 23 à laquelle des agrégats de cellulose microfibrillaire 22 sont fixés dans une plage d'épaisseur de la feuille cible 20 à la surface arrière d'une feuille imperméable aux liquides 11, la partie ventrale F ne contient d'agrégats de cellulose microfibrillaire 22 sauf dans la partie comportant la feuille cible 20, et les agrégats de cellulose microfibrillaire 22 peuvent absorber l'humidité présente plus près de la surface que la feuille cible 20.
PCT/JP2020/002691 2019-03-22 2020-01-27 Article à porter jetable attaché WO2020195095A1 (fr)

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0142098B2 (fr) * 1983-04-08 1989-09-11 Fuji Electric Co Ltd
JPH09502892A (ja) * 1993-09-23 1997-03-25 ザ、プロクター、エンド、ギャンブル、カンパニー 紙補強接着バンドを有する使い捨て吸収物品
JP2001327534A (ja) * 2000-05-25 2001-11-27 Uni Charm Corp 使い捨て着用物品
JP2012086092A (ja) * 2012-02-09 2012-05-10 Daio Paper Corp 使い捨ておむつ
JP6488042B1 (ja) * 2018-03-29 2019-03-20 大王製紙株式会社 吸収性物品

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3820043B2 (ja) * 1998-12-28 2006-09-13 ユニ・チャーム株式会社 使い捨ておむつ
JP3196933B2 (ja) * 1999-09-29 2001-08-06 株式会社日本吸収体技術研究所 繊維状化ホットメルトにより表面被覆加工された吸水性複合体、その製造法及び吸収体物品
JP6442098B1 (ja) * 2018-03-29 2018-12-19 大王製紙株式会社 吸収性物品及びその製造方法

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0142098B2 (fr) * 1983-04-08 1989-09-11 Fuji Electric Co Ltd
JPH09502892A (ja) * 1993-09-23 1997-03-25 ザ、プロクター、エンド、ギャンブル、カンパニー 紙補強接着バンドを有する使い捨て吸収物品
JP2001327534A (ja) * 2000-05-25 2001-11-27 Uni Charm Corp 使い捨て着用物品
JP2012086092A (ja) * 2012-02-09 2012-05-10 Daio Paper Corp 使い捨ておむつ
JP6488042B1 (ja) * 2018-03-29 2019-03-20 大王製紙株式会社 吸収性物品

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CN113507911A (zh) 2021-10-15
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