WO2020195097A1 - 吸収性物品 - Google Patents
吸収性物品 Download PDFInfo
- Publication number
- WO2020195097A1 WO2020195097A1 PCT/JP2020/002693 JP2020002693W WO2020195097A1 WO 2020195097 A1 WO2020195097 A1 WO 2020195097A1 JP 2020002693 W JP2020002693 W JP 2020002693W WO 2020195097 A1 WO2020195097 A1 WO 2020195097A1
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- WIPO (PCT)
- Prior art keywords
- sheet
- absorbent
- absorber
- top sheet
- woven fabric
- Prior art date
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Classifications
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L15/00—Chemical aspects of, or use of materials for, bandages, dressings or absorbent pads
- A61L15/16—Bandages, dressings or absorbent pads for physiological fluids such as urine or blood, e.g. sanitary towels, tampons
- A61L15/20—Bandages, dressings or absorbent pads for physiological fluids such as urine or blood, e.g. sanitary towels, tampons containing organic materials
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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
- A61F13/53—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
- A61F13/537—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 characterised by a layer facilitating or inhibiting flow in one direction or plane, e.g. a wicking layer
- A61F13/53708—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 characterised by a layer facilitating or inhibiting flow in one direction or plane, e.g. a wicking layer the layer having a promotional function on liquid propagation in at least one direction
- A61F13/53713—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 characterised by a layer facilitating or inhibiting flow in one direction or plane, e.g. a wicking layer the layer having a promotional function on liquid propagation in at least one direction the layer having a promotional function on liquid propagation in the vertical direction
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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
- A61F13/84—Accessories, not otherwise provided for, for absorbent pads
-
- 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
- A61F13/15203—Properties of the article, e.g. stiffness or absorbency
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F13/00—Bandages or dressings; Absorbent pads
- A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
- A61F13/45—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the shape
- A61F13/49—Absorbent articles specially adapted to be worn around the waist, e.g. diapers
- A61F13/49007—Form-fitting, self-adjusting disposable diapers
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F13/00—Bandages or dressings; Absorbent pads
- A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
- A61F13/51—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the outer layers
- A61F13/511—Topsheet, i.e. the permeable cover or layer facing the skin
- A61F13/5116—Topsheet, i.e. the permeable cover or layer facing the skin being formed of multiple layers
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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
- A61F13/51—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the outer layers
- A61F13/511—Topsheet, i.e. the permeable cover or layer facing the skin
- A61F13/512—Topsheet, i.e. the permeable cover or layer facing the skin characterised by its apertures, e.g. perforations
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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
- A61F13/53—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
- A61F13/537—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 characterised by a layer facilitating or inhibiting flow in one direction or plane, e.g. a wicking layer
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F13/00—Bandages or dressings; Absorbent pads
- A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
- A61F13/53—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium
- A61F13/534—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
- A61F13/537—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 characterised by a layer facilitating or inhibiting flow in one direction or plane, e.g. a wicking layer
- A61F13/53743—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 characterised by a layer facilitating or inhibiting flow in one direction or plane, e.g. a wicking layer characterised by the position of the layer relative to the other layers
- A61F13/53747—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 characterised by a layer facilitating or inhibiting flow in one direction or plane, e.g. a wicking layer characterised by the position of the layer relative to the other layers the layer is facing the topsheet
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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
- A61F13/53—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium
- A61F2013/530868—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium characterized by the liquid distribution or transport means other than wicking layer
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F13/00—Bandages or dressings; Absorbent pads
- A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
- A61F13/53—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium
- A61F13/534—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium having an inhomogeneous composition through the thickness of the pad
- A61F2013/53445—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 from several sheets
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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
- A61F13/53—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium
- A61F13/534—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium having an inhomogeneous composition through the thickness of the pad
- A61F2013/5349—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium having an inhomogeneous composition through the thickness of the pad being a tissue-wrapped core
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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
- A61F13/53—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
- A61F13/537—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 characterised by a layer facilitating or inhibiting flow in one direction or plane, e.g. a wicking layer
- A61F2013/53795—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 characterised by a layer facilitating or inhibiting flow in one direction or plane, e.g. a wicking layer being a surge management layer
Definitions
- the present invention relates to an absorbent article that absorbs body fluids, particularly a disposable diaper.
- Rough skin, especially rashes, is often a problem for absorbent articles, especially disposable diapers. Examples of this factor include friction with the skin when wearing a diaper, body fluids associated with wearing the diaper for a long time, and irritation received by the skin from excrement (urine / loose stool).
- the cause of irritation caused by contact with loose stool for a long time is large.
- the diaper quickly absorbs loose stool into the absorber.
- the ability of a diaper to quickly absorb loose stools into an absorber not only reduces skin irritation, but also helps prevent leaks from the legs and back.
- the first factor that inhibits the absorption of loose stool through the top sheet is that when the stool component permeates the top sheet, the component that could not permeate remains on the surface of the fibers that make up the top sheet, and the top sheet is clogged. It is to be.
- the defecation rate exceeds the absorption rate of the diaper, and it cannot be absorbed and remains on the top sheet. Residual loose stool components on the topsheet can result in loose stool components slipping on the topsheet and causing stool leakage. Therefore, it is extremely important for the diaper to quickly absorb loose stool into the absorber.
- Patent Document 1 discloses that a skin care agent is provided between so-called gather cuffs on both sides in the width direction of a diaper.
- the skin care agent is arranged on the top sheet, and an example thereof is one containing a diamide derivative as an active ingredient.
- the present inventor has found that there is a limit to suppressing rough skin with a skin care agent, and it is more important to configure the diaper so that loose stool is quickly absorbed by the absorber.
- the main subject of the present invention is to provide an absorbent article capable of preventing or suppressing rough skin of the wearer by configuring the absorbent article to quickly absorb body fluid (for example, a diaper is loose stool) into the absorber.
- body fluid for example, a diaper is loose stool
- An absorbent article having a liquid-retaining absorber and a liquid-permeable top sheet on the skin-facing surface side of the absorber.
- An absorbent article characterized in that at least an intermediate sheet for transferring body fluid that has permeated the top sheet to the absorber is provided with an absorbent mainly composed of glycerin.
- an absorbent mainly composed of glycerin is provided in the intermediate sheet between the top sheet and the absorber that transfers the body fluid that has passed through the top sheet to the absorber, the body fluid It was found that (for example, loose stool) is quickly absorbed by the absorber.
- the intermediate sheet has a second sheet on the top sheet side and a packaging sheet for wrapping the absorber, and the second sheet and the packaging sheet are provided with the absorbent.
- the absorbent can be provided not only on the second sheet but also on the packaging sheet that wraps the absorber.
- ⁇ Third aspect> This is an embodiment in which the absorbent is also provided on the non-skin side surface of the top sheet. It is considered that the effect of improving the absorption rate is enhanced by passing the absorbent provided on the non-skin side surface of the top sheet to the intermediate sheet side at the stage when the body fluid tries to permeate the top sheet.
- the top sheet is made of a non-woven fabric having a large number of holes. Since the top sheet is made of a non-woven fabric having a large number of holes, body fluids are easily absorbed, and as a result, the effect of improving the absorption rate by the absorbent according to the present invention is enhanced.
- the absorbent contains 70% by mass or more of glycerin as a component composition, and contains one or more kinds of additives selected from the group of emulsifiers, phosphoric acid esters, paraffins and surfactants as additives.
- the absorbent article so that the body fluid (for example, a diaper is loose stool) is quickly absorbed by the absorber.
- FIGS. 1 to 5 Examples of the configuration of the tape-type disposable diaper as the absorbent article of the present invention are shown in FIGS. 1 to 5.
- An example of a disposable diaper is shown, in which the reference numeral X in the figure indicates the entire width of the diaper excluding the connecting tape, the reference numeral L indicates the total length of the diaper, and the dotted pattern portion in the cross-sectional view is the front side and the back side thereof.
- a hot melt adhesive as a joining means for joining each of the constituent members located in is shown.
- 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.
- the hot melt adhesive 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 includes 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 sheet 11 that covers the back side of the absorber 56. And the exterior non-woven fabric 12 that covers the back side of the liquid-impermeable sheet and constitutes the outer surface of the product.
- side flap portions SF having no absorber 56 are formed on both sides in the width direction from the ventral portion F to the dorsal portion B, and the connecting tape is detachably connected to the outer surface of the ventral portion F.
- the connecting tape 13 is connected to the outer surface of the ventral portion F.
- the tape-type disposable diaper of the illustrated example has a pair of end flap portions EF having no absorber 56, which extend to the front side and the rear side of the absorber 56, respectively.
- 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".
- As the highly absorbent polymer particles 54 those used for this kind of absorbent article can be used as they are.
- 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 be set to 50 to 350 g / m 2 . If the polymer coating amount is less than 50 g / m 2 , it becomes difficult to secure the absorption amount. If it exceeds 350 g / m 2 , not only the effect is saturated, but also an excess of highly absorbent polymer particles gives a jerky discomfort.
- 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 non-woven fabric is not particularly limited as to what the raw material fiber is.
- olefin-based fibers such as polyethylene and polypropylene
- synthetic fibers such as polyester-based and polyamide-based fibers
- recycled fibers such as rayon and cupra
- natural fibers such as cotton
- mixed fibers and composite fibers in which two or more of these are used Etc. can be exemplified.
- the non-woven fabric may be produced by any processing.
- processing method examples include known methods such as a spunlace method, a spunbond method, a thermal bond method, a melt blown method, a needle punch method, an air through method, and a point bond method.
- spunlace method is preferable when flexibility and drapeability are required
- thermal bond method is preferable when bulkiness and softness are required.
- 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 having a faster liquid permeation speed than the top sheet 30 can be provided.
- the intermediate sheet 40 is for quickly transferring the liquid to the absorber to enhance the absorption performance by the absorber and prevent the phenomenon of "reversion" of the absorbed liquid from the absorber.
- the intermediate sheet 40 may be omitted.
- the intermediate sheet 40 examples include the same materials as the top sheet 30, spunlace non-woven fabric, spunbonded non-woven fabric, SMS non-woven fabric, pulp non-woven fabric, mixed sheet of pulp and rayon, point-bonded non-woven fabric or crepe paper.
- the air-through non-woven fabric is preferable because it is bulky. 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.
- 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 exterior non-woven fabric 12 is not particularly limited, and the material fibers include, for example, olefin-based fibers such as polyethylene and polypropylene, synthetic fibers such as polyester-based and polyamide-based, recycled fibers such as rayon and cupra, and natural fibers such as cotton. It can be used, and as a processing method, a spunlace method, a spunbond method, a thermal bond method, an air-through method, a needle punch method, or the like can be used.
- long-fiber non-woven fabrics such as spunbonded non-woven fabrics, SMS non-woven fabrics, and SMMS non-woven fabrics are suitable in terms of both feel and strength.
- 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 fiber texture is preferably 10 to 50 g / m 2 , especially 15 to 30 g / m 2 .
- 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.
- 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 dorsal portion B is provided with a connecting tape 13 as a connecting means that is detachably connected to the outer surface of the ventral portion F.
- the connecting tape 13 is turned from both sides of the waist to the outer surface of the ventral portion F to connect the connecting portion 13A of the connecting tape 13 to an appropriate position on the outer surface of the ventral portion F.
- the structure of the connecting tape 13 is not particularly limited, but it has a tape main body portion protruding from the tape mounting portion 13C and a connecting portion 13A provided in the intermediate portion in the width direction, and the tip side from the connecting portion 13A is a knob portion. ing.
- the shape of the connecting tape 13 is not particularly limited, but the tape mounting portion 13C has the longest and constant portion in the front-rear direction, and the tape main body portion may have a tapered shape that becomes thinner toward the tip. it can.
- a hook material male material for a mechanical fastener (face fastener) may be provided, or an adhesive layer may be provided.
- 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 polylami 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 20 to 100 g / m 2 and a thickness of 1 mm or less is preferable.
- the target portion can be provided by attaching the target sheet 20 for facilitating the connection to the outer surface of the ventral portion F.
- the connecting portion 13A is a hook material
- the target sheet 20 can be a target sheet 20 in which a large number of loop threads are provided on the surface of a sheet base material made of a plastic film or a non-woven fabric so that the engaging protrusions of the hook material are entangled.
- the pressure-sensitive adhesive layer one in which the surface of a sheet base material made of a plastic film having a smooth surface, which is highly adhesive, is peeled off can be used.
- the connecting portion of the connecting tape 13 on the ventral side portion F is made of a non-woven fabric
- the target sheet 20 is omitted and the hook material is used as the fiber of the exterior non-woven fabric 12. It can also be entwined and connected.
- the target sheet 20 as a mark may be provided between the exterior non-woven fabric 12 and the liquid-impermeable sheet 11, and the mark may be printed on the outer surface of the exterior non-woven fabric 12 or the liquid-impermeable sheet 11.
- an absorbent mainly composed of glycerin is provided on an intermediate sheet for transferring the body fluid that has passed through the top sheet to the absorber.
- an absorbent Q mainly composed of glycerin is provided on the intermediate sheet 40 that transfers the body fluid that has passed through the top sheet 30 to the absorber 56. Is what you are doing.
- a packaging sheet 58 for wrapping the absorber 56 may be included.
- the absorbent Q can be provided on the top sheet 30.
- the skin side surface (upper surface of FIG. 6) of the top sheet 30 is hydrophobic in order to increase the diffusivity of the liquid component of the body fluid.
- the top sheet This form is less preferred as it will inhibit the hydrophobicity of 30.
- the absorbent Q is provided on the non-skin side surface of the top sheet 30 (lower surface in FIG. 6), the absorbent provided on the non-skin side surface of the top sheet 50 at the stage where the body fluid tries to permeate the top sheet 50. It is considered that the effect of improving the absorption rate is enhanced by passing Q to the intermediate sheet 40 side.
- the holes of the non-woven fabric can be formed into an appropriate shape such as a circle or an ellipse.
- the opening diameter (equivalent diameter in the case of an ellipse) is preferably 0.1 to 2.0 mm. Further, the arrangement of the holes is, for example, a staggered pattern or a lattice pattern.
- the aperture ratio is preferably 2 to 40%. If the opening diameter and aperture ratio are small, the permeability of body fluid tends to be insufficient. If the opening diameter and aperture ratio are excessively large, there is a possibility of reversion in which the body fluid once absorbed by the absorbing element returns to the surface of the top sheet.
- the packaging sheet 58 that wraps the absorber 56 can be included. That is, the absorbent Q can be provided on the skin side surface of the packaging sheet 58.
- the top sheet 30 can be further provided with the absorbent Q, preferably on the non-skin side surface.
- the sheet on which the absorbent Q is arranged has a plurality of layers, it is desirable to provide a gradient in the coating amount of the absorbent Q, for example, as follows.
- the reason why this aspect is preferable is that the gradient of the coating amount is related to the transfer rate of the body fluid by the absorbent Q.
- the absorbent according to the present invention contains 70% by mass or more of glycerin as a component composition, more preferably 85% by mass or more, and as additives, from the group of emulsifiers, phosphoric acid esters, glycerin fatty acid esters, paraffins and surfactants. It can be an embodiment containing one or more selected additives.
- glycerin as a component composition, more preferably 85% by mass or more, and as additives, from the group of emulsifiers, phosphoric acid esters, glycerin fatty acid esters, paraffins and surfactants. It can be an embodiment containing one or more selected additives.
- As the surfactant an ether type nonionic surfactant and a nonionic surfactant including EO / PO type are preferable.
- the top sheet and the intermediate sheet are bonded by a hot melt adhesive in a striped shape or a spiral shape, they extend in the front-rear direction at intervals in the width direction of the absorbent article. Striped coating is preferred.
- the top sheet and the intermediate sheet are joined by heat embossing, they may be applied in a striped or spiral shape, or may be spray-applied to the entire target area.
- an absorbent is provided on the non-skin surface of the top sheet 30, for example, it is applied only to the absorbent on the intermediate sheet 40, and the compressive force received during packaging or storage of the absorbent article, or when used by the wearer.
- the compressive force may be used to apply a portion of the absorbent by transferring it to the non-skin surface of the topsheet 30.
- Example 1 Pseudo-loose stools are opened under three types of disposable diaper configurations having the structures shown in FIGS. 1 to 4 and in which the arrangement form of the absorbent Q is changed as shown in FIGS. 5, 6 and 7.
- the absorption characteristics were investigated by flowing down from above the top sheet.
- a disposable diaper without an absorbent was also prepared and used as a comparative example.
- 5 samples were prepared and absorption tests were conducted.
- the specific absorption test was carried out at the start of measurement of the absorption rate at the same time as the disposable diaper was unfolded and a cylinder having a diameter of 7 cm was placed on the back side of the disposable diaper to allow 20 ml of pseudo loose stool to flow in. Pseudo-loose stool begins to penetrate the topsheet from the tube through the opening of the flat plate.
- the absorption rate measurement ends when the cylinder is removed 30 seconds after the start of the absorption rate measurement and it is confirmed that the water content on the top sheet surface has disappeared.
- a known yogurt-based pseudo loose stool was used as the pseudo loose stool.
- a commercially available yogurt 2 and ion-exchanged water 3 whose viscosity was adjusted to a viscosity of 300 mPa ⁇ s were used.
- Table 1 shows the results of absorption tests for four types of disposable diapers. From this result, it was found that by applying the absorbent according to the present invention to the intermediate sheet, the disposable diaper is effective in quickly absorbing loose stool into the absorber and making it difficult for loose stool to remain on the surface.
- Table 2 shows the results of absorption tests in which the types of absorbents were changed. The results of Example 1 are reprinted in the table.
- Comparative Example 2 is obtained by applying an ether type nonionic surfactant in the form of FIG.
- Comparative Example 3 is a nonionic surfactant containing an EO / PO type applied in the form shown in FIG. From this result, it was found that the absorbent according to the present invention has a higher absorption rate and is less likely to leave loose stool on the surface as compared with those used as hydrophilic surfactants in this technical field. did.
- Unfolded state means a flat unfolded state without shrinkage or slack.
- ⁇ "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.
- 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 used for all kinds of disposable diapers such as tape type disposable diapers as in the above example, various disposable diapers such as pants type and pad type, sanitary napkins, disposable wear articles for swimming and playing in the water, and the like. It is a thing.
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Abstract
Description
この要因として、おむつの装着時の肌との摩擦、長時間装着に伴う体液、***物(尿・軟便)からの肌が受ける刺激を挙げることができる。
トップシート上への軟便成分の残留は、軟便成分がトップシート上を滑り、便漏れの結果を招くことがある。
したがって、おむつが軟便を素早く吸収体に吸収するようにすることはきわめて重要である。
また、スキンケア剤はトップシート上に配されており、その例示はジアミド誘導体を有効成分とするものである。
<第1の態様>
液保持性の吸収体とこの吸収体の肌対向面側に液透過性のトップシートとを有する吸収性物品であって、
少なくとも前記トップシートを透過した体液を前記吸収体へ移行させる中間シートに、グリセリンを主体とする吸収剤が設けられている、ことを特徴とする吸収性物品。
前記中間シートが、前記トップシート側のセカンドシートと、前記吸収体を包む包装シートとを有し、前記セカンドシート及び前記包装シートに前記吸収剤が設けられている態様である。
セカンドシートのみならず、吸収体を包む包装シートにも吸収剤を設けることができる。
前記トップシートの非肌側面にも前記吸収剤が設けられている態様である。
体液がトップシートを透過しようとする段階で、トップシートの非肌側面に設けられた吸収剤が中間シート側に受け渡すようになることで、吸収速度の向上効果が高まるものと考えられる。
前記トップシートは多数の開孔を有する不織布からなる態様である。
トップシートが多数の開孔を有する不織布からなることで、体液が吸収されやすくなり、その結果、本発明に係る吸収剤による吸収速度の向上効果が高まる。
前記吸収剤は、成分組成としてグリセリンを70質量%以上含み、添加剤として、乳化剤、リン酸エステル、パラフィン及び界面活性剤の群から選ばれた一種又は複数種の添加剤を含む態様である。
本発明の吸収性物品としてのテープタイプ使い捨ておむつの構成例を図1~図5に示した。
使い捨ておむつの一例を示しており、図中の符号Xは連結テープを除いたおむつの全幅を示しており、符号Lはおむつの全長を示しており、断面図における点模様部分はその表側及び裏側に位置する各構成部材を接合する接合手段としてのホットメルト接着剤を示している。
ホットメルト接着剤は、スロット塗布、連続線状又は点線状のビード塗布、スパイラル状、Z状等のスプレー塗布、又はパターンコート(凸版方式でのホットメルト接着剤の転写)等、公知の手法により塗布することができる。これに代えて又はこれとともに、弾性部材の固定部分では、ホットメルト接着剤を弾性部材の外周面に塗布し、弾性部材を隣接部材に固定することができる。ホットメルト接着剤としては、例えばEVA系、粘着ゴム系(エラストマー系)、オレフィン系、ポリエステル・ポリアミド系などの種類のものが存在するが、特に限定無く使用できる。各構成部材を接合する接合手段としてはヒートシールや超音波シール等の素材溶着による手段を用いることもできる。
このテープタイプ使い捨ておむつは、股間部を含む範囲に内蔵された吸収体56と、吸収体56の表側を覆う液透過性のトップシート30と、吸収体56の裏側を覆う液不透過性シート11と、液不透過性シートの裏側を覆い、製品外面を構成する外装不織布12とを有するものである。
(吸収体)
吸収体56は、***液を吸収し、保持する部分であり、繊維の集合体により形成することができる。この繊維集合体としては、綿状パルプや合成繊維等の短繊維を積繊したものの他、セルロースアセテート等の合成繊維のトウ(繊維束)を必要に応じて開繊して得られるフィラメント集合体も使用できる。繊維目付けとしては、綿状パルプや短繊維を積繊する場合は、例えば100~300g/m2程度とすることができ、フィラメント集合体の場合は、例えば30~120g/m2程度とすることができる。合成繊維の場合の繊度は、例えば、1~16dtex、好ましくは1~10dtex、さらに好ましくは1~5dtexである。フィラメント集合体の場合、フィラメントは、非捲縮繊維であってもよいが、捲縮繊維であるのが好ましい。捲縮繊維の捲縮度は、例えば、2.54cm当たり5~75個、好ましくは10~50個、さらに好ましくは15~50個程度とすることができる。また、均一に捲縮した捲縮繊維を用いることができる。
吸収体56には、その一部又は全部に高吸収性ポリマー粒子を含有させることができる。高吸収性ポリマー粒子とは、「粒子」以外に「粉体」も含む。高吸収性ポリマー粒子54としては、この種の吸収性物品に使用されるものをそのまま使用できる。高吸収性ポリマー粒子の粒径は特に限定されないが、例えば500μmの標準ふるい(JIS Z8801-1:2006)を用いたふるい分け(5分間の振とう)、及びこのふるい分けでふるい下に落下する粒子について180μmの標準ふるい(JIS Z8801-1:2006)を用いたふるい分け(5分間の振とう)を行ったときに、500μmの標準ふるい上に残る粒子の割合が30重量%以下で、180μmの標準ふるい上に残る粒子の割合が60重量%以上のものが望ましい。
高吸収性ポリマー粒子の抜け出しを防止するため、あるいは吸収体56の形状維持性を高めるために、吸収体56は包装シート58で包んでなる吸収要素50として内蔵させることができる。包装シート58としては、ティッシュペーパ、特にクレープ紙、不織布、ポリラミ不織布、小孔が開いたシート等を用いることができる。ただし、高吸収性ポリマー粒子が抜け出ないシートであるのが望ましい。クレープ紙に換えて不織布を使用する場合、親水性のSMMS(スパンボンド/メルトブローン/メルトブローン/スパンボンド)不織布が特に好適であり、その材質はポリプロピレン、ポリエチレン/ポリプロピレンなどを使用できる。繊維目付けは、5~40g/m2、特に10~30g/m2のものが望ましい。
トップシート30は液透過性を有するものであり、例えば、有孔又は無孔の不織布や、多孔性プラスチックシートなどを用いることができる。また、このうち不織布は、その原料繊維が何であるかは、特に限定されない。例えば、ポリエチレンやポリプロピレン等のオレフィン系、ポリエステル系、ポリアミド系等の合成繊維、レーヨンやキュプラ等の再生繊維、綿等の天然繊維などや、これらから二種以上が使用された混合繊維、複合繊維などを例示することができる。さらに、不織布は、どのような加工によって製造されたものであってもよい。加工方法としては、公知の方法、例えば、スパンレース法、スパンボンド法、サーマルボンド法、メルトブローン法、ニードルパンチ法、エアスルー法、ポイントボンド法等を例示することができる。例えば、柔軟性、ドレープ性を求めるのであれば、スパンレース法が、嵩高性、ソフト性を求めるのであれば、サーマルボンド法が、好ましい加工方法となる。
トップシート30を透過した液を速やかに吸収体へ移行させるために、トップシート30より液の透過速度が速い、中間シート(「セカンドシート」とも呼ばれている)40を設けることができる。この中間シート40は、液を速やかに吸収体へ移行させて吸収体による吸収性能を高め、吸収した液の吸収体からの「逆戻り」現象を防止するためのものである。中間シート40は省略することもできる。
液不透過性シート11は、特に限定されるものではないが、透湿性を有するもが好ましい。液不透過性シート11としては、例えば、ポリエチレンやポリプロピレン等のオレフィン系樹脂中に無機充填剤を混練して、シートを成形した後、一軸又は二軸方向に延伸して得られた微多孔性シートを好適に用いることができる。また、液不透過性シート11としては、不織布を基材として防水性を高めたものも用いることができる。
外装不織布12は液不透過性シート11の裏側全体を覆い、製品外面を布のような外観とするものである。外装不織布12としては特に限定されず、素材繊維としては、例えばポリエチレン又はポリプロピレン等のオレフィン系、ポリエステル系、ポリアミド系等の合成繊維の他、レーヨンやキュプラ等の再生繊維、綿等の天然繊維を用いることができ、加工法としてはスパンレース法、スパンボンド法、サーマルボンド法、エアスルー法、ニードルパンチ法等を用いることができる。ただし、肌触り及び強度を両立できる点でスパンボンド不織布やSMS不織布、SMMS不織布等の長繊維不織布が好適である。不織布は一枚で使用する他、複数枚重ねて使用することもできる。後者の場合、不織布相互をホットメルト接着剤等により接着するのが好ましい。不織布を用いる場合、その繊維目付けは10~50g/m2、特に15~30g/m2のものが望ましい。
トップシート30上を伝わって横方向に移動する***物を阻止し、いわゆる横漏れを防止するために、表面の幅方向WDの両側には、装着者の肌側に立ち上がる起き上がりギャザー60が設けられていると好ましい。もちろん、起き上がりギャザー60は省略することもできる。
各サイドフラップ部SFには、糸ゴム等の細長状弾性部材からなるサイド弾性部材64が前後方向LDに沿って伸長された状態で固定されており、これにより各サイドフラップ部SFの脚周り部分が平面ギャザーとして構成されている。脚周り弾性部材64は、図示例のように、ギャザーシート62の接合部分のうち接合始端近傍の幅方向外側において、ギャザーシート62と液不透過性シート11との間に設けるほか、サイドフラップ部SFにおける液不透過性シート11と外装不織布12との間に設けることもできる。脚周り弾性部材64は、図示例のように各側で複数本設ける他、各側に1本のみ設けることもできる。
背側部分Bには、腹側部分Fの外面に対して着脱可能に連結される連結手段としての連結テープ13がそれぞれ設けられている。おむつの装着に際しては、連結テープ13を腰の両側から腹側部分Fの外面に回して、連結テープ13の連結部13Aを腹側部分F外面の適所に連結する。
腹側部分Fにおける連結テープ13の連結箇所には、ターゲット部を設けることが好ましい。ターゲット部は、図示例のように、連結を容易にするためのターゲットシート20を腹側部分Fの外面に貼り付けることにより設けることができる。ターゲットシート20は、連結部13Aがフック材の場合、フック材の係合突起が絡まるようなループ糸がプラスチックフィルムや不織布からなるシート基材の表面に多数設けられたものを用いることができ、また粘着材層の場合には粘着性に富むような表面が平滑なプラスチックフィルムからなるシート基材の表面に剥離処理を施したものを用いることができる。また、腹側部分Fにおける連結テープ13の連結箇所が不織布からなる場合、例えば図示例のように外装不織布12を有する場合には、ターゲットシート20を省略し、フック材を外装不織布12の繊維に絡ませて連結することもできる。この場合、目印としてのターゲットシート20を外装不織布12と液不透過性シート11との間に設ける他、外装不織布12や液不透過性シート11の外面に目印を印刷してもよい。
次に本発明の実施の形態を説明する。
実施の形態は、トップシートを透過した体液を吸収体へ移行させる中間シートに、グリセリンを主体とする吸収剤が設けられているものである。
この場合、トップシート30に肌側面に吸収剤Qを設けるのではなく、図6に示すように、トップシート30の非肌側面(図6の下面)に吸収剤Qを設けるのが望ましい。
トップシート30の肌側面(図6の上面)は疎水性であることが体液の液成分の拡散性を高めるのに好ましいところ、グリセリンを主体とする親水性の吸収剤を設けるとすればトップシート30の疎水性を阻害することになるから、この形態はあまり好ましいことではない。
他方で、トップシート30の非肌側面(図6の下面)に吸収剤Qを設けると、体液がトップシート50を透過しようとする段階で、トップシート50の非肌側面に設けられた吸収剤Qが中間シート40側に受け渡すようになることで、吸収速度の向上効果が高まるものと考えられる。
不織布の開孔としては、円や楕円などの適宜の形状とすることができる。開孔径(楕円の場合は相当直径)は0.1~2.0mmが望ましい。また、開孔の配置としては、例えば千鳥状又は格子状である。開口率としては、2~40%が望ましい。開孔径及び開口率が小さいと体液の透過性が十分でない傾向にある。開孔径及び開口率が過度に大きいと、一旦吸収要素が吸収した体液がトップシート表面に戻ってしまう逆戻りを生じる可能性がある。
吸収剤Qを配置するシートが複数層である場合において、吸収剤Qの塗布量に、例えば次のように勾配を設けることが望ましい。この態様が好ましい理由は、塗布量の勾配が吸収剤Qによる体液の移行速度に関係するからである。
トップシート≪中間シート<包装シート
塗布量としては、中間シート40を例にとれば、0.02g/m2以上とすることが好ましく、0.05g/m2以上とすることが更に好ましく、そして、3.00g/m2以下とすることが好ましく、1.50g/m2以下とすることが更に好ましく、具体的には、0.05g/m2以上1.20g/m2以下とすることが好ましい。
界面活性剤としては、エーテル型非イオン系界面活性剤、EO/PO型を含む非イオン系界面活性剤が好ましい。
他方、トップシート30の非肌面に吸収剤を設ける場合、例えば中間シート40への吸収剤への適用のみとし、吸収性物品の包装時又は保管時に受ける圧縮力、あるいは着用者の使用時の圧縮力を利用して、吸収剤の一部をトップシート30の非肌面に転写することによって適用するようにしてもよい。
(実験例1)
図1~図4に示す構造であって、図5、図6及び図7に示すように吸収剤Qの配置形態を替えた3種類の使い捨ておむつ構成の下で、擬似軟便を、開孔を有するトップシートの上方から流下させて吸収特性を調査した。なお、吸収剤を配置していない使い捨ておむつも用意し、比較例とした。
合計4種類の使い捨ておむつについては、それぞれ5サンプルを用意し、吸収試験を行った。
擬似軟便を流入して3分後に使い捨ておむつの背側にろ紙10cm×10cmを10枚重ね、その上から1kgのおもり10cm×10cmを置き、60秒後にろ紙側に移行する液の吸収に伴う重量増分を逆戻り量とする。
その後に、使い捨ておむつを解体し、背側の吸収体が存在する幅8cm×前後方向15cmの測定領域を切り取り、吸収体、包装シート、中間シート(セカンドシート)、トップシートのそれぞれについて、液の吸収に伴う重量増分を算出した。この場合、測定領域の重量は既知であるから、重量増分として算出できる。
擬似軟便としては、公知のヨーグルト系擬似軟便を使用した。ここでは、市販のヨーグルト2、イオン交換水3の質量割合で、粘度:300mPa・sに粘度調整したものを使用した。
明細書中の以下の用語は、明細書中に特に記載が無い限り、以下の意味を有するものである。
・符号「LD」は吸収性物品の前後方向を、WDは幅方向を示す。前後方向と幅方向とは直交するものである。
Claims (5)
- 液保持性の吸収体とこの吸収体の肌対向面側に液透過性のトップシートとを有する吸収性物品であって、
少なくとも前記トップシートを透過した体液を前記吸収体へ移行させる中間シートに、グリセリンを主体とする吸収剤が設けられている、
ことを特徴とする吸収性物品。 - 前記中間シートが、前記トップシート側のセカンドシートと、前記吸収体を包む包装シートとを有し、前記セカンドシート及び前記包装シートに前記吸収剤が設けられている請求項1記載の吸収性物品。
- 前記トップシートの非肌側面にも前記吸収剤が設けられている請求項1記載の吸収性物品。
- 前記トップシートは多数の開孔を有する不織布からなる請求項1記載の吸収性物品。
- 前記吸収剤は、成分組成としてグリセリンを70質量%以上含み、添加剤として、乳化剤、リン酸エステル、パラフィン及び界面活性剤の群から選ばれた一種又は複数種の添加剤を含む請求項1記載の吸収性物品。
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JP6020980B2 (ja) * | 2011-09-14 | 2016-11-02 | 大王製紙株式会社 | 吸収性物品の製造方法 |
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WO2017034796A1 (en) * | 2015-08-26 | 2017-03-02 | The Procter & Gamble Company | Absorbent articles having three-dimensional substrates and indicia |
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