WO2014050595A1 - 吸収性物品 - Google Patents
吸収性物品 Download PDFInfo
- Publication number
- WO2014050595A1 WO2014050595A1 PCT/JP2013/074720 JP2013074720W WO2014050595A1 WO 2014050595 A1 WO2014050595 A1 WO 2014050595A1 JP 2013074720 W JP2013074720 W JP 2013074720W WO 2014050595 A1 WO2014050595 A1 WO 2014050595A1
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- WIPO (PCT)
- Prior art keywords
- sheet
- acid
- absorbent article
- blood
- hydrocarbon moiety
- Prior art date
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Images
Classifications
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Definitions
- the present invention relates to absorbent articles such as sanitary napkins, panty liners, incontinence pads, incontinence liners and the like.
- an absorbent article provided with a diffusion sheet on the entire skin-side surface of the absorber is known as a prior art (for example, patent documents 1 and 2).
- a prior art for example, patent documents 1 and 2.
- menstrual blood excreted in the top sheet is diffused in the planar direction by the diffusion sheet and then smoothly transferred to the absorber.
- Patent No. 4266685 gazette Patent No. 2810772
- menstrual blood absorbed in the absorbent article may be confirmed.
- the wearer may be uneasy about the performance of the absorbent article if the diffusion in the planar direction of menstrual blood absorbed by the absorbent article is uneven.
- the diffusion sheet is provided on the entire skin-side surface of the absorbent body, the diffusion of menstrual blood in the plane direction becomes large, so menstrual blood absorbed by the absorbent article in the plane direction. Inhomogeneities in diffusion may be significant.
- the present invention provides an absorbent article capable of giving a sense of security to the performance of the absorbent article when the menstrual blood absorbed in the absorbent article is confirmed at the time of replacement of the absorbent article. With the goal.
- the absorbent article according to the invention of claim 1 comprises a liquid-permeable top sheet provided on the skin side, a liquid-impermeable back sheet provided on the clothing side, and a gap between the top sheet and the back sheet. And a first sheet provided between the top sheet and the absorbent and provided in the region where the absorbent is provided, the first sheet and the absorbent And the second sheet is liquid-permeable and liquid-retentive, and the second sheet is liquid-pervious but liquid-retentive. Instead, it hides the red color of menstrual blood absorbed by the absorber.
- the region where the first sheet is provided includes a discharge port contact region.
- the invention of claim 3 is the absorbent article according to claim 1 or 2, wherein the first sheet contains 50% by weight or more of cellulose fibers.
- the invention of claim 4 is the absorbent article according to any one of claims 1 to 3, wherein the second sheet contains 50% by weight or more of thermoplastic chemical fibers.
- the invention of claim 5 is the absorbent article according to any one of claims 1 to 4, wherein the ratio of the area of the first sheet to the area of the absorbent is 10 to 90%.
- the area where the second sheet is provided is the area where the first sheet is provided.
- the ratio of the area of the second sheet to the area of the first sheet is 110% or more, and the ratio of the area of the second sheet to the area of the absorber is 150% or less.
- the absorbent article according to any one of claims 1 to 6 further comprising: a middle and high portion projecting in a thickness direction; Including a cushion portion between the two seats, the cushion portion having a maximum thickness of 3 to 30 mm, The cushion portion includes a plurality of fibers, and intersection points of the plurality of fibers are heat-fused.
- the middle and high portions have a kinematic viscosity of 0.01 to 80 mm 2 / s at 40 ° C. and 0.01 to 4.0 mass%.
- a blood slipping agent having a water retention rate of less than 1,000 and a weight average molecular weight of less than 1,000.
- the invention of claim 9 is the absorbent article according to claim 8, wherein the blood slipping agent further has an IOB of 0.00 to 0.60.
- the blood slipping agent comprises the following (i) to (iii), (I) Hydrocarbons, (Ii) consisting of (ii-1) hydrocarbon moiety and (ii-2) carbonyl group (-CO-) and oxy group (-O-) inserted between C-C single bonds of hydrocarbon moiety A compound having one or more same or different groups selected from the group, and (iii) (iii-1) between a hydrocarbon moiety and a CC single bond of (iii-2) hydrocarbon moiety And one or more identical or different groups selected from the group consisting of a carbonyl group (-CO-) and an oxy group (-O-) inserted, and (iii-3) a hydrogen atom of a hydrocarbon moiety A compound having one or more same or different groups selected from the group consisting of carboxyl group (—COOH) and hydroxyl group (—OH) to be substituted, And selected from the group consisting of
- the invention according to claim 11 relates to the absorbent article according to any one of claims 8 to 10, wherein the blood slipping agent comprises the following (i ′) to (iii ′), (I ') hydrocarbons, (Ii ') Carbonyl bond (-CO-), ester bond (-COO-) inserted between (ii'-1) hydrocarbon moiety and C-C single bond of (ii'-2) hydrocarbon moiety A compound having one or more same or different bonds selected from the group consisting of carbonate bond (-OCOO-) and ether bond (-O-), and (iii ') (iii'-1) ) Carbonyl bond (-CO-), ester bond (-COO-), carbonate bond (-OCOO-) inserted between the hydrocarbon moiety and the C-C single bond of (iii'-2) hydrocarbon moiety , And an ether bond (—O—), one or more, same or different bond, and (iii′-3) a hydrogen atom of a hydrocarbon
- the invention of claim 12 relates to the absorbent article according to any one of claims 8 to 11, wherein the blood slipping agent is any one of the following (A) to (F), (A) A compound having (A1) a chain hydrocarbon moiety and 2 to 4 hydroxyl groups replacing hydrogen atoms of the chain hydrocarbon moiety, (A2) a chain hydrocarbon moiety, and a chain hydrocarbon An ester with a compound having one carboxyl group replacing the hydrogen atom of the hydrogen moiety, (B) A compound having (B1) a chain hydrocarbon moiety and 2 to 4 hydroxyl groups replacing hydrogen atoms of the chain hydrocarbon moiety, (B2) a chain hydrocarbon moiety, and a chain hydrocarbon An ether with a compound having one hydroxyl group replacing the hydrogen atom of the hydrogen moiety, (C) a carboxylic acid, hydroxy acid, alkoxy acid or oxo acid containing (C1) a chain hydrocarbon moiety and 2 to 4 carboxyl groups replacing the hydrogen atom of the chain hydrocarbon moiety
- the invention of claim 13 is the absorbent article according to any one of claims 8 to 12, wherein the blood slipping agent is (a 1 ) a chain hydrocarbon tetraol and at least one fatty acid. And esters of (a 2 ) chain hydrocarbon triol and at least one fatty acid, esters of (a 3 ) chain hydrocarbon diol and at least one fatty acid, (b 1 ) chain hydrocarbon tetraol And ether of at least one aliphatic monohydric alcohol, (b 2 ) ether of (b 2 ) chain hydrocarbon triol and at least one aliphatic monohydric alcohol, (b 3 ) chain hydrocarbon diol and at least one aliphatic ethers of monohydric alcohols, (c 1) chain hydrocarbon tetracarboxylic acids having 4 carboxyl groups, hydroxy acid, alkoxy acid or oxo acid, at least one fatty Esters of monohydric alcohols, (c 2) a chain hydrocarbon tricarboxylic acids having 3
- a wearer can obtain the sense of security with respect to the performance of an absorbent article, when the menstrual blood absorbed by the absorbent article is confirmed at the time of replacement
- FIG. 1 is a plan view of the absorbent article of the first embodiment of the present invention.
- FIG. 2 is a schematic cross-sectional view showing a cross section taken along line AA of FIG.
- FIG. 3 shows the absorption state of menstrual blood in the top sheet, the diffusion sheet, the cover sheet, and the absorbent when the absorbent article according to the first embodiment of the present invention absorbs menstrual blood excreted from the wearer. It is a figure for demonstrating.
- FIG. 4 is a plan view of the absorbent article of the first embodiment of the present invention when menstrual blood excreted from the wearer is absorbed.
- FIG. 5 is a perspective view of the absorbent article of the second embodiment of the present invention.
- FIG. 6 is a plan view of the absorbent article of the second embodiment of the present invention.
- FIG. 7 is a schematic cross-sectional view showing a cross section taken along the line BB of FIG.
- FIG. 8 is an electron micrograph of the skin contact surface of the top sheet in the sanitary napkin in which the top sheet contains avian C2L oil fatty acid glyceride.
- FIG. 9 is a photomicrograph of menstrual blood with or without a blood slipping agent.
- FIG. 10 is a diagram for explaining a method of measuring surface tension.
- the absorbent article in the first embodiment of the present invention is a sanitary napkin.
- FIG. 1 is a plan view of an absorbent article according to a first embodiment of the present invention
- FIG. 2 is a schematic cross-sectional view showing a cross section taken along line AA of FIG.
- the absorbent article 1 is provided between the liquid-permeable top sheet 2 provided on the skin side, the liquid-impermeable back sheet 3 provided on the clothing side, and the top sheet 2 and the back sheet 3. It includes a liquid-retaining absorber 4, a diffusion sheet 5 provided between the top sheet 2 and the absorber 4, and a cover sheet 6 provided between the diffusion sheet 5 and the absorber 4.
- the absorbent article 1 further includes a pair of side sheets 7 provided on both sides in the width direction of the top sheet 2.
- the absorbent article 1 has a main body portion 11 and a pair of wing portions 12 extending in the width direction from the main body portion 11.
- the wing portion 12 is composed of a side seat 7 and a back seat 3.
- An adhesive portion 8 is provided on the clothes-side surface of the main body portion 11 and the wing portion 12.
- the X direction is the width direction of the absorbent article 1
- the Y direction is the longitudinal direction of the absorbent article.
- the shape of the main body portion 11 is not particularly limited as long as it is a shape that conforms to the shape of a female body and a short, such as a substantially rectangular shape, a substantially oval shape, or an hourglass shape.
- the dimension in the longitudinal direction of the outer shape of the main body 11 is preferably 100 to 500 mm, more preferably 150 to 350 mm. Further, the dimension in the width direction of the outer shape of the main body portion 8 is preferably 30 to 200 mm, more preferably 40 to 180 mm.
- the top sheet 2 moves menstrual blood discharged from the wearer to the diffusion sheet 5 or the cover sheet 6 provided therebelow. Further, the top sheet 2 holds the absorber 4 by sandwiching the absorber 4 with the back sheet 3.
- the top sheet 2 is wholly or partially liquid-permeable, and the liquid-permeable area of the top sheet 2 is a liquid-permeable non-woven fabric, a woven fabric, a resin film having a large number of liquid-permeable holes, or a large number of meshes. It can be formed of a net-like sheet or the like.
- thermoplastic hydrophobic chemical fibers include single fibers such as polyethylene (PE), polypropylene (PP) and polyethylene terephthalate (PET), fibers obtained by graft polymerization of PE and PP, and composite fibers such as a core-sheath structure.
- PE polyethylene
- PP polypropylene
- PET polyethylene terephthalate
- web formation is carried out by combining either the dry method (for example, the card method, the spun bond method, the meltblown method and the air laid method) and the wet method, and the dry method and the wet method.
- the dry method for example, the card method, the spun bond method, the meltblown method and the air laid method
- the dry method and the wet method May be Examples of the method of bonding the web when producing the non-woven fabric used for the top sheet 2 include methods such as thermal bonding, needle punch, chemical bonding and the like, but are not limited to these methods.
- a spunlace formed in a sheet shape by a water flow entanglement method may be used for the top sheet 2.
- unevenness was made to the skin side surface such as non-woven fabric in which unevenness is formed on the upper layer side by shrinking the lower layer side using heat-shrinkable fibers, etc. and non-woven fabric on which unevenness is formed by applying air during web formation.
- a non-woven fabric may be used as the top sheet 2.
- fibers of non-woven fabric used for the top sheet 2 composite fibers of core-sheath type, core-sheath eccentric type, or side-by-side type of different melting points of left and right components may be used.
- hollow fibers, irregular fibers such as flat, Y-type and C-type, three-dimensional crimped fibers with latent crimp or apparent crimp, and split by physical load such as water flow, heat or embossing Fibers such as fibers may be mixed in the non-woven fabric used for the top sheet 2.
- the fineness of the non-woven fabric used for the top sheet 2 is preferably 1.1 to 8.8 dtex.
- hydrophobic synthetic fibers are used for the top sheet 2, in consideration of the liquid penetration and rewet of the top sheet 2, the hydrophilic agent, the water repellant, etc. are kneaded into the hydrophobic synthetic fibers, the hydrophilic agent or the water repellent
- the hydrophobic synthetic fiber may be coated with a solution or the like.
- the hydrophobic synthetic fiber may be rendered hydrophilic by corona treatment or plasma treatment.
- the resin film or the net-like sheet may be formed of polypropylene (PP), polyethylene (PE), polyethylene terephthalate (PET) or the like.
- the back sheet 3 prevents the menstrual blood absorbed by the absorber 4 from leaking out.
- the back sheet is a liquid-impervious film mainly composed of polyethylene (PE) and polypropylene (PP), etc., a breathable resin film, a composite in which a breathable resin film is bonded to a nonwoven fabric such as spunbond or spunlace.
- a film, a spunbond / meltblown / spunbond (SMS) nonwoven fabric obtained by sandwiching a highly water-resistant meltblown nonwoven fabric with a strong spunbond nonwoven fabric can be used.
- the back sheet 3 has, for example, a basis weight of 15 to 30 g / m 2 mainly composed of low density polyethylene (LDPE) resin. It is preferred to use a resin film.
- LDPE low density polyethylene
- the absorber 4 has a function to absorb and hold menstrual blood. It is preferable that the absorber 4 is bulky, not easily deformed, and less in chemical stimulation.
- the absorber 4 for example, a mixture of hydrophilic fiber and super absorbent polymer (SAP), a mixture of fluff pulp or air-laid non-woven fabric and super absorbent polymer, and the like can be used.
- hydrophilic fibers used for the absorber 4 include cellulose such as ground pulp and cotton, regenerated cellulose such as rayon and fibril rayon, semi-synthetic cellulose such as acetate and triacetate, particulate polymer, fibrous polymer, thermoplastic hydrophobic chemical Fibers, thermoplastic hydrophobized chemically treated fibers, and mixtures thereof can be mentioned.
- a cellulose foam and a continuous foam of a synthetic resin can also be used for the absorber 4.
- the superabsorbent polymer (SAP) of the absorber As the superabsorbent polymer (SAP) of the absorber 4, particulate polymers such as sodium acrylate copolymer having absorbability and hygroscopicity are generally used. Also, silver, copper, zinc, silica, activated carbon, an aluminosilicate compound or zeolite may be added to the polymer in order to impart other functions to the polymer. Thereby, functions such as deodorizing property, antibacterial property, or endothermic effect can be imparted to the polymer.
- SAP superabsorbent polymer
- particulate polymers such as sodium acrylate copolymer having absorbability and hygroscopicity are generally used.
- silver, copper, zinc, silica, activated carbon, an aluminosilicate compound or zeolite may be added to the polymer in order to impart other functions to the polymer. Thereby, functions such as deodorizing property, antibacterial property, or endothermic effect can
- the diffusion sheet 5 has liquid permeability. Thereby, the diffusion sheet 5 can move the menstrual blood excreted in the top sheet 2 to the below-mentioned cover sheet 6 promptly. Further, the diffusion sheet 5 further has a liquid holding property. Thereby, a part of menstrual blood remains in the diffusion sheet 5, and the diffusion sheet is colored red. The wearer can visually recognize the red-colored diffusion sheet 5 through the top sheet 2 and can recognize that menstrual blood is absorbed in the absorber 4.
- the diffusion sheet 5 is preferably provided in the area where the absorber 4 is provided. Thereby, when replacing the absorbent article, the wearer visually recognizes the diffusion sheet 5 colored in red beyond the area where the absorber 4 is provided, and the menstrual blood from the absorbent article 1 is leaked. Anxiety can be prevented from occurring.
- region where the diffusion sheet 5 is provided includes an excretion opening
- excreted menstrual blood does not pass through the diffusion sheet 5 and moves to the cover sheet 6 described later, so that the diffusion sheet 5 is not colored in red or only a part of the diffusion sheet 5 is colored in red can do.
- the excretory opening contact area is an area of the absorbent article 1 corresponding to the excretory opening of menstrual blood of the wearer.
- the ratio of the area of the diffusion sheet 5 to the area of the absorber 4 is preferably about 10 to about 90%, more preferably about 15 to about 70%, and still more preferably about 20 to about 50%.
- the ratio of the area of the diffusion sheet 5 to the area of the absorber 4 is smaller than about 10%, the diffusion sheet 5 may be too small, making it difficult to visually recognize the red-colored diffusion sheet 5.
- the ratio of the area of the diffusion sheet 5 to the area of the absorber 4 is greater than about 90%, menstrual blood may not diffuse throughout the diffusion sheet 5. In this case, the diffusion of menstrual blood in the diffusion sheet 5 in the planar direction may be uneven.
- the length of the diffusion sheet 5 in the longitudinal direction is preferably about 30 to about 200 mm, more preferably about 40 to about 170 mm, and still more preferably about 50 to about 100 mm. Further, the length in the width direction of the diffusion sheet 5 is preferably about 10 to about 100 mm, more preferably about 20 to about 70 mm, and still more preferably about 25 to about 50 mm. When the length in the longitudinal direction of the diffusion sheet 5 is smaller than about 30 mm and the length in the width direction of the diffusion sheet 5 is smaller than about 10 mm, the diffusion sheet 5 becomes too small and the red colored diffusion sheet 5 is visible May be difficult.
- menstrual blood may not diffuse into the entire diffusion sheet 5.
- the diffusion of menstrual blood in the diffusion sheet 5 in the planar direction may be uneven.
- the diffusion sheet 5 preferably contains cellulosic fibers.
- the proportion of cellulosic fibers in the diffusion sheet 5 is preferably about 50 to 100% by weight, more preferably about 70 to 100% by weight, based on the weight of the diffusion sheet 5.
- the proportion of the cellulose-based fibers in the diffusion sheet 5 is smaller than about 50% by weight, the liquid permeability of the diffusion sheet 5 may be deteriorated, or the liquid retention of the diffusion sheet 5 may be reduced. May become weak.
- the cellulose-based fibers used for the diffusion sheet 5 include ground pulp, cotton, regenerated cellulose (eg, rayon and fibril rayon), semi-synthetic cellulose (eg, acetate and triacetate), and combinations thereof. Because of low cost and good formability, the cellulose-based fibers used for the diffusion sheet 5 are preferably ground pulp.
- Methods of forming a web used when producing the diffusion sheet 5 include dry methods (for example, card method, spun bond method, meltblown method, air laid method and TOW open method), wet methods and combinations thereof.
- the web bonding method used when producing the diffusion sheet 5 includes thermal bonding, needle punch, chemical bonding, stitch bond and water jet punch method. Because of low cost and good diffusion performance, the diffusion sheet 5 is preferably a tissue made by a wet method and mainly composed of crushed pulp.
- the cover sheet 6 hides the red color of menstrual blood absorbed by the absorber 4. As a result, even if the diffusion of menstrual blood absorbed in the absorbent body 4 in the planar direction is uneven, the menstrual blood absorbed in the absorbent body 4 is not noticeable, so the wearer can improve the performance of the absorbent article 1 You can control what you feel uneasy about.
- the cover sheet 6 has liquid permeability. Thereby, the cover sheet 6 can move the menstrual blood excreted in the top sheet 2 to the absorber 4 promptly. In addition, the cover sheet 6 does not have liquid retention. Thereby, it can suppress that menstrual blood remains in the cover sheet 6, and it can suppress that the part colored red by menstrual blood is seen for a wearer except the above-mentioned diffusion sheet 5.
- the cover sheet 6 preferably comprises about 50 to 100% by weight, more preferably about 70 to 100% by weight of thermoplastic chemical fibers, relative to the weight of the cover sheet 6.
- the proportion of the thermoplastic chemical fiber in the cover sheet 6 is less than about 50% by weight, the liquid permeability of the cover sheet 6 may be too small, or the liquid retention may be too high.
- thermoplastic chemical fibers used for the cover sheet 6 include polyethylene (PE), polypropylene (PP), polyethylene terephthalate (PET), and graft polymers of PE and PP.
- Fiber types of thermoplastic chemical fibers used for the cover sheet 6 include monofilaments, composite fibers, heat-shrinkable fibers, heat-stretchable fibers, variant fibers, three-dimensional crimped fibers, and split fibers.
- the composite fibers used for the cover sheet 6 include core-sheath composite fibers in which the melting point of the core component is higher than the melting point of the sheath component (for example, eccentric core-sheath composite fibers) and side-by-side composite fibers having two different melting points. Can be mentioned.
- modified fibers used for the cover sheet 6 include modified fibers of hollow type, flat type, Y type, C type and the like.
- the three-dimensional crimped fiber used for the cover sheet 6 includes latent crimp and actual crimp.
- the split fibers used for the cover sheet 6 include split fibers split by physical load such as water flow, heat, and embossing.
- thermoplastic chemical fiber of the cover sheet 6 is a fiber containing a hydrophilic agent or a water repellent agent or a fiber coated with a hydrophilic agent or a water repellent agent.
- the thermoplastic chemical fiber of the cover sheet 6 may be a fiber hydrophilized by a hydrophilization treatment such as corona treatment and plasma treatment.
- the cover sheet 6 may be whitened in order to enhance the cover property of the cover sheet 6.
- the thermoplastic chemical fibers of the cover sheet 6 may contain inorganic fillers such as titanium oxide, barium sulfate and calcium carbonate.
- the thermoplastic chemical fiber of the cover sheet 6 is a core-sheath type composite fiber, only the core may contain an inorganic filler, or the sheath may contain only an inorganic filler.
- the cover sheet 6 can be made more concealed. May be
- the fibers used for the cover sheet 6 are preferably composite fibers rather than single fibers, and more preferably core-sheath composite fibers containing polyethylene in the sheath portion.
- the fineness of the fibers used for the cover sheet 6 is preferably about 1.1 to about 8.8 dtex in order to enhance the whitening of the cover sheet 6 in order to facilitate the penetration of menstrual blood into the cover sheet 6. .
- Methods of forming a web used when producing the cover sheet 6 include dry methods (for example, card method, spun bond method, meltblown method, air laid method and TOW open method), wet methods and combinations thereof.
- the web bonding method used when producing the cover sheet 6 includes thermal bonding, needle punching, chemical bonding, stitch bonding and water jet punching.
- the non-woven fabric used for the cover sheet 6 is preferably an air through non-woven fabric produced by the card method in order to facilitate the penetration of menstrual blood into the cover sheet 6 and to enhance the whitening of the cover sheet 6.
- the area where the cover sheet 6 is provided preferably includes the area where the diffusion sheet 5 is provided.
- the ratio of the area of the cover sheet 6 to the area of the diffusion sheet 5 is preferably about 110% or more, more preferably about 130% or more, and still more preferably 150% or more.
- the ratio of the area of the cover sheet 6 to the area of the diffusion sheet 5 is smaller than about 110%, the area of the cover sheet 6 around the diffusion sheet 5 is small, so red around the cover sheet 6 colored red by menstrual blood The area of the uncolored part may be reduced, and the visibility of the red-colored cover sheet 6 may be deteriorated due to menstrual blood.
- the ratio of the area of the cover sheet 6 to the area of the absorber 4 is not particularly limited as long as it can hide the red color of menstrual blood absorbed by the absorber 4, but is preferably about 150% or less, more preferably about 100 % Or less, more preferably 100%.
- the side sheets 7 prevent menstrual blood from leaking outward in the width direction of the absorbent article 1 through the surface and / or the inside of the top sheet 2.
- the side sheets 7 preferably have hydrophobicity or water repellency.
- a spunbonded nonwoven fabric or an SMS nonwoven fabric is used for the side sheet 7, for example, a spunbonded nonwoven fabric or an SMS nonwoven fabric is used.
- an air through non-woven fabric capable of reducing rubbing irritation to the skin for the side sheet 7.
- the absorbent article 1 may not have the side sheet 7.
- top sheet 2, the back sheet 3, the absorber 4, the diffusion sheet 5, the cover sheet 6 and the side sheets 7 be joined to each other also in order to prevent their respective layers from being separated.
- embossing, ultrasound, hot melt adhesives and combinations thereof can be used.
- the top sheet 2 and the back sheet 3 are joined at unshown seal portions formed at both longitudinal end portions of the main body portion 11 by embossing, for example.
- the back sheet 3 and the side sheet 7 are joined, for example, by embossing at seal portions (not shown) formed on both sides in the longitudinal direction of the wing portion 12.
- Top sheet 2 and diffusion sheet 5 are joined, for example, by a hot melt adhesive.
- the top sheet 2 and the side sheets 7 are joined by, for example, a hot melt adhesive on both sides in the width direction of the main body portion 11.
- the wing portion 12 is provided to the absorbent article 1 in order to stably fix the absorbent article 1 to the undergarment.
- the absorbent article 1 can be stably fixed to the undergarment by bending the wing portion 12 to the outer surface side of the undergarment and then sticking it to the crotch region of the undergarment through the adhesive portion 8.
- the shape of the wing 12 is substantially rectangular.
- the adhesive part 8 on the clothes side of the back sheet 3 fixes the main body part 11 inside the crotch area of the undergarment, and the adhesion part 8 on the clothes side of the wing part 12 fixes the wing part 12 outside the crotch area of the undergarment Do.
- an adhesive which forms the adhesion part 8 that in which, for example, a styrene-type polymer, a tackifier, or a plasticizer is a main component is used suitably.
- styrene-based polymer examples include styrene-ethylene-butylene-styrene block copolymer, styrene-butylene polymer, styrene-butylene-styrene block copolymer, styrene-isobutylene-styrene copolymer, etc. Only one of them may be used, or a blend of two or more of these polymers may be used. Among these, a styrene-ethylene-butylene-styrene block copolymer is preferable as the pressure-sensitive adhesive of the adhesion portion 8 in that the heat stability is good.
- the organic compound solid at normal temperature can be used preferably.
- the tackifier includes, for example, C5 petroleum resin, C9 petroleum resin, dicyclopentadiene petroleum resin, rosin petroleum resin, polyterpene resin, terpene phenol resin and the like, and as the plasticizer, for example, triflate phosphate
- monomer plasticizers such as dibutyl phthalate and dioctyl phthalate
- polymer plasticizers such as vinyl polymers and polyesters may be mentioned.
- FIG. 3 is a figure for explaining the state of absorption of menstrual blood in top sheet 2, diffusion sheet 5, cover sheet 6, and absorber 4 when absorptive article 1 absorbed menstrual blood excreted from a wearer. It is.
- FIG. 4 is a plan view of the absorbent article 1 when the menstrual blood excreted from the wearer is absorbed.
- menstrual blood does not remain on the top sheet 2 as shown in FIG. 3.
- thin traces 21 remain in the area where the top sheet 2 absorbed menstrual blood.
- menstrual blood remains in the diffusion sheet 5, and the diffusion sheet 5 is colored in red. Since the area of the diffusion sheet 5 is small, menstrual blood diffuses throughout the diffusion sheet 5 and the entire diffusion sheet 5 is colored red.
- menstrual blood does not remain on the cover sheet 6, a thin trace 61 remains on the area where the cover sheet 6 absorbed menstrual blood.
- menstrual blood remains in the absorber 4 and a red-colored diffused area 41 of menstrual blood can be seen. Since the area of the absorber 4 is large, a part of the absorber 4 is colored in red. For this reason, the diffusion in the planar direction of menstrual blood absorbed by the absorber 4 may be uneven.
- the wearer when the wearer looks at the absorbent article 1 from the outside, the wearer absorbs the menstrual blood of the top sheet 2, the diffusion sheet 5 colored in red by menstrual blood, and the absorbent 21.
- the menstrual blood diffusion area 41 of the body 4 can be seen. Since the traces 61 (see FIG. 3) of the cover sheet 6 that absorb menstrual blood are thin, they are hidden by the top sheet 2 and can not be seen. In addition, since the menstrual blood 41 diffusing the absorber 3 is concealed in red by the cover sheet 6, it looks thin.
- the surface on the skin side of the absorbent 3 is separated from the surface on the skin side of the top sheet 2 due to the bulk of the cover sheet 6, so the menstrual blood 41 diffusing the absorbent 4 is the skin of the absorbent article 1. It looks away from the side surface. And, as described above, since the menstrual blood 41 diffusing the absorber 3 looks thinner by the cover sheet 6, the menstrual blood 41 diffusing the absorber 4 is the surface on the skin side of the absorbent article 1 It seems to be further away from For this reason, the menstrual blood 41 which has spread the absorber 4 becomes less noticeable.
- the trace 21 which absorbed menstrual blood of the top sheet 2 is thin, it is inconspicuous. Moreover, the trace 61 which absorbed the menstrual blood of the cover sheet 6 is hidden by the top sheet 2, and can not be seen. Furthermore, the menstrual blood 41 which has diffused the absorber 4 is inconspicuous by the cover sheet 6. For this reason, menstrual blood absorbed by the absorbent article 1 is visually recognized only by the diffusion sheet 5. By the way, since the whole diffusion sheet 5 is colored in red, the diffusion in the planar direction of menstrual blood absorbed by the absorbent article 1 does not look uneven. For this reason, when the wearer confirms the menstrual blood absorbed by the absorbent article 1 when replacing the absorbent article 1, the absorbent article 1 gives the wearer a sense of security with respect to the performance of the absorbent article 1. Can be given.
- the diffusion area of menstrual blood in the absorbent article 1 when the absorbent article 1 is viewed from the skin side (hereinafter referred to as a menstrual blood diffusion area), and the absorbability when the absorbent article 1 is viewed from the dressing side
- the wearer may judge the performance of the absorbent article based on the difference in area between the menstrual blood and the diffuse area of the article 1 (hereinafter referred to as the absorber diffuse area).
- the absorber diffusion area is larger than the menstrual blood diffusion area, menstrual blood excreted in the top sheet 2 is absorbed by a part far away from the skin, and thus the load on the skin is reduced, and wear is caused.
- the wearer may judge, and the wearer may judge that the absorbent article can absorb a large amount of menstrual blood. Since the absorbent article 1 of one embodiment of the present invention has a small menstrual blood diffusion area, the absorber diffusion area is larger than the menstrual blood diffusion area. For this reason, when the absorbent article 1 is used, the burden on the skin decreases and the wearer judges that a large amount of menstrual blood is absorbed. From this point as well, the absorbent article 1 feels secure about its performance Can be given to the wearer.
- an absorbent article according to a second embodiment of the present invention will be described with reference to the drawings.
- the absorbent article in the second embodiment of the present invention is a sanitary napkin.
- FIG. 5 is a perspective view of an absorbent article 1A according to a second embodiment of the present invention.
- Absorbent article 1A is a sanitary napkin.
- the right back corresponds to the front of the wearer and the front of the left corresponds to the back of the wearer, but the absorbent article 1A has a generally symmetrical shape in the longitudinal and lateral directions. Have.
- Absorbent article 1A is an absorbent body between a liquid-permeable top sheet 2A, a liquid-impermeable back sheet (not shown), a liquid-permeable top sheet 2A and a liquid-impermeable back sheet Not shown). Absorbent article 1A has pressing part 13A.
- Absorbent article 1A has inside high part 14A which protrudes in the thickness direction of absorptive article 1A in a discharge mouth contact field.
- the top sheet 2A has a plurality of ridge-groove structures extending in the longitudinal direction on the skin contact surface, and in FIG. 5, the boundaries between ridges and grooves are solid lines in FIG. It is indicated by.
- a wide area surrounded by two solid lines means a buttock, and a narrow area surrounded by two solid lines means a groove
- a plurality of ridges and a plurality of grooves are alternately arranged in the width direction of the absorbent article 1A.
- the absorbent article 1A has a peripheral portion 15A surrounding the middle high portion 14A.
- “middle and high portion” means a portion including the top sheet 2A and a cushion portion described later, and generally, from the point having the maximum thickness of the absorbent article 1A, toward the outer peripheral portion The thickness is reduced.
- the “central portion” means a portion including the thickest point in the middle high portion 14A.
- the said thickness means the thickness from the clothes contact surface of a back sheet.
- the “central portion” with respect to the middle high portion 14A is preferably 0 to about 50%, more preferably 0 to about 40% of the distance from the thickest point to the outer edge of the middle high portion 14A. Preferably, it means an area of 0 to about 30%.
- FIG. 6 is a front view of the absorbent article 1A shown in FIG. 5 as viewed from the skin contact surface side of the top sheet 1A.
- the upper side corresponds to the front of the wearer, and the lower side corresponds to the rear of the wearer.
- Absorbent article 1A is an absorbent body 4A between a liquid-permeable top sheet 2A, a liquid-impermeable back sheet (not shown), a liquid-permeable top sheet 2A and a liquid-impermeable back sheet including.
- the absorbent article 1A has an excavating opening, in particular, a middle high portion 14A which protrudes in the thickness direction of the absorbent article 1A in the minor labial abutment region.
- the middle high portion 14A includes a part of the top sheet 2A and a cushion portion 16A disposed between the top sheet 2A and the absorber 4A.
- a surrounding portion 15A and a pressing portion 13A surrounding the middle high portion 14A are shown.
- the diffusion sheet 5A is provided in the portion where the cushion portion 16A of the middle and high portion 14A is provided, and the cover sheet 6A is provided in the portion where the absorber 4A is provided.
- the diffusion sheet 5A and the cover sheet 6A in the absorbent article 1A of the second embodiment are the same as the diffusion sheet 5 and the cover sheet 6 in the absorbent article 1 of the first embodiment, the second embodiment The description of the diffusion sheet 5A and the cover sheet 6A in the absorbent article 1A of the form is omitted.
- the absorbent article 1A in the second embodiment absorbs menstrual blood
- only the entire diffusion sheet 5A looks red, so only the entire middle and high portion 14A turns red. It looks colored. For this reason, the wearer can uniformly see the diffusion of menstrual blood absorbed by the absorbent article 1A in the planar direction. Therefore, also in the case of the absorbent article 1A in the second embodiment, when the wearer confirms the menstrual blood absorbed by the absorbent article 1A at the time of replacement, the absorbent article 1A feels secure about the performance. It can be given to the wearer.
- FIG. 7 is a schematic cross-sectional view showing a cross section taken along the line BB of FIG.
- the absorbent article 1A shown in FIG. 7 the liquid impermeable back sheet 3A, the absorbent body 4A, the cover sheet 6A and the liquid permeable top sheet 2A are laminated in order from the bottom, and The cushion portion 16A and the diffusion sheet 5A are disposed between the absorber 4A and the liquid-permeable top sheet 2A. Therefore, the cushion portion 16A is disposed between the diffusion sheet 5A and the cover sheet 6A.
- the middle and high portion 14A includes a part of the top sheet 2A and the cushion portion 16A, and the absorbent article 1A is the top sheet near the outer edge of the cushion portion 16A, more specifically, outside the cushion portion 16A. It has pressing part 13A formed by pressing 2A and absorber 4A.
- Absorbent article 1A has a plurality of eyebrow structure on the skin contact surface.
- the density of the cushion portion 16A in the outer peripheral portion 142A is higher than the density of the cushion portion 16A in the central portion 141A.
- FIG. 7 shows an elastic member 17A.
- the adhesive portion 8A is coated on the clothing contact surface of the liquid impermeable back sheet 3A, and the wearer fixes the adhesive portion 8A to the clothing and uses the absorbent article 1A at the time of use. it can.
- the material of the cushion portion 16A is not particularly limited, and examples of the material include fiber-containing matter and non-fiber-containing matter.
- examples of the fiber content include those containing natural fibers, chemical fibers, or both of them, and those containing heat-sealed intersections of a plurality of fibers are preferable. By heat-sealing the intersections of the fibers, even after absorbing menstrual blood, the cushion portion 16A and hence the middle and high portion 14A can be excellent in shape stability.
- the fiber content of the cushioning portion 16A preferably includes about 50 to about 100% by mass, and more preferably about 70 to about 100% by mass of thermoplastic chemical fibers in order to thermally fuse the fibers.
- thermoplastic chemical fibers of the cushion portion 16A include polyethylene (PE), polypropylene (PP), polyethylene terephthalate (PET), graft polymers of PE and PP, and the like, and as thermoplastic chemical fibers, single fibers are used. And composite fibers such as core-sheath fibers, heat shrinkable fibers, heat extensible fibers and the like.
- the thermoplastic chemical fiber can be kneaded with or coated with a hydrophilic agent, a water repellent agent or the like in consideration of ease of entering menstrual blood, difficulty in rewetback, and the like.
- the thermoplastic chemical fiber can be made hydrophilic by subjecting the thermoplastic chemical fiber to a corona treatment, a plasma treatment, or the like.
- the fiber in order to enhance the whitening property of the cushion portion 16A, can contain an inorganic filler such as titanium oxide, barium sulfate, calcium carbonate or the like.
- an inorganic filler can be contained in the core and / or the sheath.
- composite fibers are preferable to single fibers as the fibers constituting the fiber-containing material, in consideration of the compression recovery property, and core-sheath fibers comprising polyethylene in the sheath portion It is more preferable that
- the composite fiber examples include a core-sheath type in which the melting point of the core component is higher than the melting point of the sheath component, an eccentric type in the core-sheath, and a side-by-side type fiber in which the melting points of the two components are different.
- the cushion portion 16A is a fiber-containing material
- the cushion portion 16A is a hollow fiber type, flat type, Y-type, C-type variant fiber, latent crimp, three-dimensional crimp fiber such as apparent crimp, And divided fibers etc. which are divided by physical load such as water flow, heat, embossing and the like.
- the fibers constituting the cushioning portion 16A should have a fineness of about 1.1 to about 8.8 dtex in consideration of ease of entering menstrual blood and the like, feel and the like. Is preferred.
- Examples of the above-mentioned natural fibers include crushed pulp, cellulose such as cotton, regenerated cellulose such as rayon and fibril rayon, and semi-synthetic cellulose such as acetate and triacetate.
- Pulverized pulp is preferred.
- the cushion portion 16A contains cellulose, leakage can be suppressed when it is difficult for body pressure to be applied to the middle and high portions 14A such as a sleeping posture. If the cushion portion 16A is formed of 100% thermoplastic chemical fiber, menstrual blood may flow through the outermost surface of the top sheet 2A, and a leak may occur.
- the cushioning portion 16A When the cushioning portion 16A is a fiber-containing material, the cushioning portion 16A may form a web, for example, dry (card method, spunbond method, meltblown method, air laid method, TOW etc), wet, etc., or a combination thereof. It can be made in a method. In addition, the cushion portion 16A can be manufactured, for example, using a web bonding method such as thermal bonding, needle punching, chemical bonding, or hydroentangling method.
- a web bonding method such as thermal bonding, needle punching, chemical bonding, or hydroentangling method.
- non-fiber-containing material examples include elastomers, and continuous foams such as foamed polyethylene.
- elastomer used for the cushion portion 16A for example, thermoplastic elastomers of polyester type, urethane type, olefin type, styrene type and polyamide type, low density polyethylene using a metallocene catalyst, ethylene- ⁇ -olefin copolymer, The combination of these etc. is mentioned.
- the polyester elastomer include those containing an aromatic polyester in a hard segment and an amorphous polyether, an aliphatic polyester, and the like as a soft segment.
- the said continuous foam means the open-pored foam which the foam cell is opening. In a closed pore foam in which foam cells are not open, menstrual blood is difficult to pass through the inside of the cushion portion, and the liquid permeability is poor.
- the polyurethane type elastomer which consists of polyester as a thermoplastic elastomer, low molecular weight glycol, methylene bis phenyl isocyanate etc. is mentioned, for example.
- the olefin elastomer include random copolymers of ethylene and ⁇ -olefin, and random copolymers of ethylene, ⁇ -olefin and diene.
- block copolymers such as SEBS, SIS, SEPS, SBS, are mentioned, for example.
- the polyamide elastomer include those containing nylon as a hard segment and polyester or polyol as a soft segment.
- the non-fiber inclusions may include high density polyethylene, low density polyethylene, linear low density polyethylene, etc., for molding stability.
- the non-fiber-containing material may also contain antiblocking agents, ultraviolet light absorbers, thickening / branching agents, matting agents, coloring agents, and various other improving agents.
- the non-fiber-containing material can be kneaded or coated with a hydrophilic agent, a water repellent agent or the like.
- the non-fiber-containing material can be made hydrophilic by subjecting the non-fiber-containing material to corona treatment, plasma treatment or the like.
- the absorbent article 1A has a middle high portion 14A protruding in the thickness direction of the absorbent article 1A in the excretion opening contact area, and the middle high portion 14A includes a part of the top sheet 2A, the top sheet 2A, and the absorbent 4A.
- the cushion 14A has a central portion 141A and an outer peripheral portion 142A surrounding the central portion 141A, and the density of the cushion 16A in the outer peripheral portion 142A is the central
- the absorbent article 1A can have the middle and high portions 14A both in dry time before absorbing menstrual blood and in wet time after absorbing menstrual blood. Produces the effect of fitting to the wearer's outlet, in particular the small labia, making it less likely to leak. The reason why the absorbent article 1A produces this effect is considered to be as follows.
- the shape of the labia minora in adult women is not uniform, and there are individual differences, but it is less likely to deform when moving the body, especially less so than the labia majora.
- the degree of deformation when moving the body is largely different depending on the type of woman, and in a thick woman, when moving the body, the large labia tends to be very easily deformed.
- a middle and high portion exists in the discharge port contact area, and the density of the cushion portion 16A constituting the middle and high portion 14A is different between the outer peripheral portion 142A and the central portion 141A of the middle high portion 14A, the outer peripheral portion 142A
- the density of the cushion portion 16A in the upper portion is higher than the density of the cushion portion 16A in the central portion 141A. Therefore, the relatively low density cushion portion 16A at the central portion 141A of the middle and high portion 14A has low rigidity, and when in contact with the minor labia, it deforms along the shape of the minor labia and can bury the minor labia .
- the relatively high density cushion portion 16A in the outer peripheral portion 142A of the middle and high portion 14A has high rigidity, and at the time of dry before absorbing menstrual blood, the boundary between the labia minora and the labia majora, or You can keep in touch.
- the relatively high density cushion portion 16A in the outer peripheral portion 142A of the middle and high portion 14A has high compression recovery, even when wet after absorbing menstrual blood, it has contact with an excretory port having a complicated shape. You can keep doing.
- the “excretion opening contact area” means an area in contact with the wearer's excretion opening, and the “excretion opening” mainly refers to the small labia, but the outer periphery of the middle and high portions However, it does not prevent touching the labia majora.
- the central portion 141A of the middle and high portion 14A is easily compressed, it deforms in a concave shape along the shape of the wearer's small labia during wearing, and the small labia is buried and the top sheet 2A is closely contacted with the vaginal opening , And excessive spread of menstrual blood on the top sheet 2A.
- the top sheet 2A can be in close contact with the vaginal opening, the distance between the vaginal opening and the absorber is close during wearing, and when the cushion portion 16A is mainly made of thermoplastic chemical fiber, At the time of the first absorption of menstrual blood, the top sheet 2A and the cushion portion 16A can be passed to the absorbent 4A quickly without diffusing the menstrual blood in the planar direction. Once the passage of menstrual blood is established, the area is hydrophilized, and menstrual blood passes through the top sheet 2A and the cushion portion 16A and is rapidly absorbed even during the second and subsequent menstrual blood absorptions. It is possible to move to the body 4A.
- the absorbent article 1A is characterized in that the density of the cushion portion 16A in the outer peripheral portion 142A of the middle high portion 14A is higher than the density of the cushion portion 16A in the central portion 141A of the middle high portion 14A. This is achieved by having a squeezed portion 13A formed by squeezing at least the top sheet 2A and the absorber 4A in the vicinity of the outer edge of the cushion portion 16A.
- the middle and high portions 14A By squeezing at least the top sheet 2A and the absorber 4A so that the outer edge of the cushion portion 16A is compressed and the thickness thereof is reduced by the tensile force of the pressed top sheet 2A and the absorber 4A, the middle and high portions 14A
- the density of the cushion portion 16A in the outer peripheral portion 142A can be made higher than the density of the cushion portion 16A in the central portion 141A of the middle high portion 14A.
- the compression degree of the cushion portion 16A is low, and the thickness thereof is not as thin as the outer peripheral portion 142A.
- the top sheet 2A is absorbed when wet after absorbing menstrual blood. It is difficult to separate from the body 4A, and the height of the density of the cushion portion 16A at the outer peripheral portion 142A of the middle high portion 14A can be maintained.
- “near the outer edge” related to the cushion portion 16A is a concept including not only the outer edge of the cushion portion 16A but also the inner side than the outer edge of the cushion portion 16A and the outer side than the outer edge of the cushion portion 16A. Further, “in the vicinity” is a range of preferably ⁇ 15%, more preferably ⁇ 10%, of the distance from the center of the cushion portion 16A to the outer edge of the cushion portion 16A in the planar direction of the absorbent article 1A. And more preferably, it means the ⁇ 5% range. In addition, the "center” regarding the cushion part 16A means the center of the longitudinal direction and the width direction of the absorbent article 1A.
- the pressing part 13A formed by pressing the top sheet 2A and the absorber 4A continuously on the outer side of the cushion part 16A exists in the absorbent article 1A
- the top on the outer side of the cushion part 16A A squeezed portion formed by intermittently squeezing the sheet 2A and the absorber 4A may be present.
- a squeezed portion formed by continuously or intermittently squeezing the top sheet 2A, the cushion portion 16A, and the absorber 4A may be present.
- a squeezed portion 13A formed by squeezing only the cushion portion 16A continuously or intermittently may be present at the edge of the cushion portion 16A.
- the shape of the cushion portion 16A before being incorporated into the absorbent article 1A is that the density of the cushion portion 16A in the outer peripheral portion 141A of the middle high portion 14A is the central portion 141A of the middle high portion 14A after the cushion portion 16A is incorporated.
- the absorbent article 1A having a density higher than the density of the cushion portion 16A is formed for example, the projection in the thickness direction of the absorbent article has a shape similar to that of the small labia, for example, substantially circular
- the shape may be substantially oval, substantially rounded rectangle, a figure surrounded by two arcs, or the like.
- the cushion portion 16A can have a constant thickness in the thickness direction of the absorbent article 1A, can be thicker from the center to the outer edge, or can be thicker from the center to the outer edge It can be thinner towards.
- the density of the cushion portion 16A in the outer peripheral portion 142A of the middle high portion 14A is, for example, when the absorber 4A and the top sheet 2A are squeezed. Since the density may not be higher than the density of the cushion portion 16A at the central portion 141A of the middle and high portion 14A, the thickness of the cushion portion 16A is constant, or the thickness increases from the center toward the outer edge Is preferred.
- the cushioning portions 16A may have different basis weights depending on places.
- the density of the cushion portion 16A at the central portion 141A of the middle and high portion 14A is preferably about 0.001 to 0.1 g / cm 3 , more preferably about 0.005 to about 0.08 g / cm 3 , and still more preferably about It is 0.01 to about 0.05 g / cm 3 . If the density is less than about 0.001 g / cm 3 , compression recovery tends to be insufficient when wet after absorbing menstrual blood, and the density is more than about 0.1 g / cm 3 And, it tends to be deformed along the wearer's labia minora and to be difficult to fit on the labia minora.
- the density of the cushion portion 16A at the central portion 141A and the outer peripheral portion 142A of the middle high portion 14A can be measured as follows. (1) Using a two-dimensional laser displacement gauge, measure the thickness t (cm) of the cushion portion at the position to be measured. Examples of the two-dimensional laser displacement meter include a high accuracy two-dimensional laser displacement meter LJ-G series (model: LJ-G030) manufactured by Keyence Corporation. From the thickness of the absorbent article 1A at the position to be measured, the thickness of the cushion portion 16A at the position to be measured is the absorbency in the region where the cushion portion 16A does not exist, ie, the peripheral portion 142A surrounding the middle high portion 14A. It can be calculated by reducing the thickness of the article 1A.
- the density ratio at different positions of the cushion portion 16A can be compared simply by their thickness. That is, when the basis weight of the cushion portion 16A is constant, this means that the thinner the thickness of the cushion portion 16A, the higher the density of the cushion portion 16A.
- the density of the cushion portion 16A in the outer peripheral portion 142A of the middle high portion 14A is higher than the density of the cushion portion 16A in the central portion 141A of the middle high portion 14A, preferably, the cushion in the central portion 141A of the middle high portion 14A.
- the ratio is less than about 1.1 times, the compression recovery of the cushioning portion 16A at the outer peripheral portion 142A of the middle and high portion 14A tends to be insufficient when wet, and the ratio is greater than about 5 times.
- the rigidity of the cushion portion 16A at the outer peripheral portion 142A of the middle and high portion 14A is high, and the wearer tends to easily feel a foreign object.
- the maximum thickness of the cushion portion 16A is preferably about 3 to about 30 mm, more preferably about 4 to about 20 mm, and still more preferably about 5 to about 10 mm. .
- the “maximum thickness” relating to the cushion portion 16A and the middle high portion 14A means the thickness of the thickest portion of the cushion portion 16A and the middle high portion 14A, respectively.
- the cushion portion 16A preferably has a longitudinal length of the absorbent article 1A, preferably about 10 to about 300 mm, more preferably about 40 to about 250 mm, and still more preferably about 50 to about 100 mm. It has a widthwise length of the absorbent article 1A of about 100 mm, more preferably about 20 to about 70 mm, and still more preferably about 25 to about 50 mm.
- the middle and high portions 14A can be fitted to the wearer's excretory opening, in particular, the small labia, and leakage can be suppressed.
- the middle and high portions 14A do not fit the wearer's excretory opening, particularly, the small labia, and leakage easily occurs, and the size of the cushion portion 16A is larger than the above range In addition, it is easy to feel discomfort when worn, and a gap with the small labia is also likely to occur, and leakage is likely to occur.
- the cushion portion 16A is preferably about 50 to about 1,000 g / m 2 , preferably about 100 to 500 g / m 2 , and more preferably about 150 to about 300 g / m 2 . It has a basis weight. By having a basis weight within the above range, even when wet after absorption of menstrual blood, middle and high part 14A does not collapse, middle and high part 14A fits the wearer's excretory opening, in particular, the small labia and less leaks can do.
- the cushion portion 14A preferably retains a maximum thickness of about 50% or more after absorbing 2 g of horse EDTA blood as compared to before absorbing the horse EDTA blood, and has a maximum thickness of about 60% or more. It is more preferable to maintain the thickness, and still more preferably to maintain the maximum thickness of about 70% or more.
- the middle and high portion 14A including the cushion portion 16A is not easily crushed even when wet after absorption of menstrual blood, and the middle and high portion 14A fits the wearer's excretory opening, in particular, the small labia , Can reduce leakage.
- the reason for dropping 2 g of equine EDTA blood is that the amount of menstrual blood excreted at one time by humans is said to be approximately 2 g.
- 2 g of equine EDTA blood is dropped on the entire cushion part using a pipette, but when the cushion part contains a water repellent material, it is difficult for equine EDTA blood to enter the cushion part
- equine EDTA blood may be absorbed into the cushion while pressurizing the cushion.
- the maximum thickness of the cushion after absorption of 2 g of equine EDTA blood can be measured one minute after all equine EDTA blood has been absorbed.
- the maximum thickness of the cushion portion can be measured using the two-dimensional laser displacement meter described above. The EDTA blood will be described later.
- the absorbent article 1A has a curved structure in which the middle high portion 14A is curved inward.
- the absorbent article 1A having a curved structure is considered to make the absorbent article 1A more fit with the curve of the wearer's body, and the absorbed menstrual blood is less likely to leak.
- the curved structure is, for example, an elastic member 17A (see FIG. 7), for example, thread rubber, an elastic film or the like on both sides in the longitudinal direction of the absorbent article 1A, and tension is applied on both sides in the longitudinal direction of the absorbent article. It can be formed by applying.
- the liquid-permeable top sheet 2A has, on the skin contact surface, a plurality of ridges extending in the longitudinal direction of the absorbent article 1A and a plurality of grooves (in the present specification, the length of the absorbent article
- the top sheet 2A having a plurality of ridges and a plurality of grooves extending in the direction may be simply referred to as a top sheet 2A having a ridge structure.
- the top sheet 2A can be manufactured according to the methods described in JP-A-2008-025078, JP-A-2008-025079, and the like.
- the top sheet 2A having a ridge and groove structure may be manufactured according to the method described in Japanese Patent Application Laid-Open Nos. 2011-226010, 2011-226011, and the like.
- the top sheet 2A having the above-mentioned ridge groove structure is a pair of gear rolls having a rotation axis orthogonal to the conveying direction, and a gap between those rotating while meshing a plurality of teeth arranged on respective outer peripheral surfaces of the gear rolls.
- the top sheet to be treated can be formed by fluid treatment.
- the draw ratio of the gear roll is preferably about 105% or more, more preferably about 105 to about 500%, still more preferably about 120 to 300%, and still more preferably about 130. It is about 200%.
- the draw ratio is less than about 105%, the stretchability of the top sheet 2A is insufficient, and the cushion portion 16A is easily crushed during production of the absorbent article 1A, and the draw ratio is greater than about 500%.
- the top sheet 2A tends to be easily broken.
- the liquid-permeable top sheet 2A may have a plurality of slits.
- the slits are widened at the time of manufacturing the absorbent article 1A, and the cushion portion 16A is prevented from being crushed excessively. be able to.
- the top sheet 2A having the plurality of slits can be formed by passing the top sheet 2A through a slit roll in which longitudinally elongated slits are arranged in a zigzag manner.
- the top sheet 2A having the plurality of slits can be manufactured, for example, as described in JP-A-2002-528174.
- the liquid-permeable top sheet 2A may have a plurality of pin hole portions.
- the top sheet 2A having the weir groove structure, the slit, the pin opening portion, etc. is a cushion portion by the change of the shape of the weir groove structure of the top sheet 2A, the opening and closing of the slit and the pin opening portion, etc. Excessive collapse of the 16A can be prevented. From this point of view, it is preferable that the ridge structure, slit, pin opening portion and the like of the top sheet 2A exist at least in a portion in contact with the cushion portion 16A, that is, a portion constituting the middle high portion 14A. It may exist in the whole sheet 2A.
- the absorbent article 1A can be of any shape, such as rectangular, oval, wedge, etc., and may have so-called flaps to prevent misalignment with clothing, eg shorts.
- the size thereof can be reduced, and the absorbent article of the present disclosure is preferably about 100 A longitudinal length of from about to about 500 mm, more preferably about 120 to about 350 mm, and more preferably about 150 to about 250 mm, preferably about 40 to about 200 mm, more preferably about 45 to about 180 mm, and more preferably And a length in the width direction of about 50 to 100 mm.
- the absorbent body 4A preferably has a longitudinal length of about 80 to about 350 mm, more preferably about 100 to 300 mm, and still more preferably about 120 to 250 mm. It is because it will become difficult for the inside high part 14A to contact the excretion opening, in particular, the small labia when the high rigidity absorber 4A in the absorbent article 1A has an excessive size.
- the buttock is a very large area of change when the wearer walks or sits down, and if a part of the absorber 4A in contact with the buttocks is absorbed, absorption in the part in contact with the excretory opening, particularly the small labia The body 4A also tends to be swayed.
- the absorbent body 4A preferably has a widthwise length of about 30 to about 100 mm, more preferably about 35 to about 80 mm, and still more preferably about 40 to about 70 mm. If the width of the absorber 4A is excessively larger than the width of the crotch of the wearer, the deformation of the absorber 4A causes the menstrual blood to diffuse to other areas and / or be transferred and absorbed. May leak.
- the middle and high portion 14A may contain the following blood slipping agent.
- the liquid-permeable top sheet has a kinematic viscosity of about 0.01 to about 80 mm 2 / s at 40 ° C. and about 0.05 to about 4.0% by mass at least on the convex portion.
- a blood slipping agent having a water retention rate of less than about 1,000 and a weight average molecular weight of less than about 1,000.
- the blood slipping agent has a kinematic viscosity of about 0 to about 80 mm 2 / s at 40 ° C., preferably about 1 to about 70 mm 2 / s, and about 3 to about 60 mm 2. It is more preferable to have a kinematic viscosity of 1 / s, more preferably about 5 to about 50 mm 2 / s, and still more preferably about 7 to about 45 mm 2 / s.
- the above-mentioned kinematic viscosity is a) as the molecular weight of the blood slipping agent is increased, b) polar groups such as carbonyl bond (-CO-), ether bond (-O-), carboxyl group (-COOH), hydroxyl group
- polar groups such as carbonyl bond (-CO-), ether bond (-O-), carboxyl group (-COOH), hydroxyl group
- the melting point of the blood slipping agent is preferably 45 ° C. or less.
- the kinematic viscosity tends to be high.
- the kinematic viscosity at 40 ° C. may be simply referred to as “kinetic viscosity”.
- the kinematic viscosity in the blood slipping agent exceeds about 80 mm 2 / s, the viscosity of the blood slipping agent is high, and the skin contact surface of the top sheet is reached. Along with the blood, it tends to be difficult to slide from the projections to the recesses and then to move into the interior of the absorber.
- the above-mentioned dynamic viscosity can be measured at a test temperature of 40 ° C. using a Canon Fentzberg reverse flow viscometer according to “5. Dynamic viscosity test method” of JIS K 2283: 2000.
- the blood slipping agent preferably has a water content of about 0.01 to about 4.0% by weight, and preferably has a water content of about 0.02 to about 3.5% by weight. It is more preferable to have a water content of about .03 to about 3.0% by weight, and even more preferable to have a water content of about 0.04 to about 2.5% by weight, and about 0.05 to about 2 More preferably, it has a water retention rate of 0% by mass.
- water-holding rate means the proportion (mass) of water that the substance can hold, and can be measured as follows. (1) In a temperature-controlled room at 40 ° C., leave a 20 mL test tube, rubber stopper, substance to be measured and deionized water overnight. (2) In the above-mentioned temperature-controlled room, 5.0 g of a substance to be measured and 5.0 g of deionized water are put into a test tube. (3) In the above-mentioned temperature-controlled room, the mouth of the test tube is plugged with a rubber plug, and the test tube is rotated once and allowed to stand for 5 minutes.
- the above-mentioned water holding rate is a) as the molecular weight of the blood slipping agent decreases, and b) polar groups such as carbonyl bond (-CO-), ether bond (-O-), carboxyl group (-COOH), The higher the ratio of hydroxyl groups (-OH) etc., the larger the value tends to be. It is because a blood slipping agent has more hydrophilicity. Also, the water retention rate tends to increase as the IOB increases, that is, as the inorganic value increases and as the organic value decreases. It is because a blood slipping agent will have more hydrophilicity.
- the blood slipping agent has a weight average molecular weight of less than about 1,000 and preferably has a weight average molecular weight of less than about 900.
- the weight average molecular weight is about 1,000 or more, the blood slipping agent itself has tackiness, which tends to make the wearer uncomfortable.
- the weight average molecular weight is high, the viscosity of the blood slipping agent tends to be high, so it is difficult to lower the viscosity of the blood slipping agent to a viscosity suitable for coating by heating. As a result, the blood slipping agent may occur if it has to be diluted with a solvent.
- the blood slipping agent preferably has a weight average molecular weight of about 100 or more, and more preferably about 200 or more. If the weight-average molecular weight is decreased, the vapor pressure of the blood-slippering agent may be increased to be vaporized during storage, which may cause problems such as a decrease in the amount and an odor when worn.
- the weight average molecular weight means a value in terms of polystyrene, which is determined by gel permeation chromatography (GPC).
- GPC measurement conditions include the following. Model: High-performance liquid chromatogram Lachrom Elite manufactured by Hitachi High-Technologies Corporation Column: Showa Denko KK SHODEX KF-801, KF-803 and KF-804 Eluent: THF Flow rate: 1.0 mL / min Implanted volume: 100 ⁇ L Detection: RI (differential refractometer)
- the weight average molecular weight described in the Example of this specification is measured based on the said conditions.
- the blood slipping agent can have an IOB of about 0.00 to about 0.60.
- IOB Inorganic Organic Balance
- IOB is preferably about 0.00 to about 0.60, more preferably about 0.00 to about 0.50, and about 0.00 to about 0. More preferably, it is 40, and more preferably about 0.00 to about 0.30. This is because when the IOB is in the above-mentioned range, the above-mentioned hydraulic capacity and dynamic viscosity tend to satisfy the above-mentioned requirements.
- the blood slipping agent preferably has a melting point of 45 ° C. or less.
- the blood slipping agent tends to have a kinematic viscosity in the above range.
- the "melting point” means the peak top temperature of an endothermic peak when changing from solid state to liquid state when measured at a temperature rising rate of 10 ° C./min in a differential scanning calorimeter.
- the melting point can be measured, for example, using a DSC-60 type DSC measurement apparatus manufactured by Shimadzu Corporation.
- the blood slipping agent may be liquid or solid at room temperature (about 25 ° C.) as long as it has a melting point of about 45 ° C. or less, ie, even if the melting point is about 25 ° C. or higher, Alternatively, it may be less than about 25 ° C. and may have a melting point such as, for example, about -5 ° C., about -20 ° C., and the like.
- the blood slipping agent does not have a lower limit to its melting point, it is preferable that its vapor pressure be low.
- the vapor pressure of the above-mentioned blood slipping agent is preferably about 0 to about 200 Pa at 25 ° C. (1 atm), more preferably about 0 to about 100 Pa, and about 0 to about 10 Pa. More preferably, about 0 to about 1 Pa is even more preferred, and about 0.0 to about 0.1 Pa is even more preferred.
- the vapor pressure is preferably about 0 to about 700 Pa and about 0 to about 100 Pa at 40 ° C. (1 atm). Is more preferably about 0 to about 10 Pa, even more preferably about 0 to about 1 Pa, and even more preferably about 0.0 to about 0.1 Pa. If the vapor pressure of the blood slipping agent is high, it may be vaporized during storage, which may cause problems such as a decrease in the amount and an odor when worn.
- the melting point of the above-mentioned blood slipping agent can be selected according to the weather, the length of wearing time and the like. For example, in areas where the average temperature is about 10 ° C. or less, menstrual blood may be excreted and then cooled by the ambient temperature by employing a blood slipping agent having a melting point of about 10 ° C. or less. Also, it is considered that the blood slipping agent is easy to function.
- the melting point of the blood slipping agent is preferably higher in the range of about 45 ° C. or less. It is because it is hard to be influenced by sweat, friction at the time of wearing, etc., and even when it is worn for a long time, the blood slipping agent is hardly biased.
- the skin contact surface of the top sheet is coated with a surfactant for the purpose of changing the surface tension of menstrual blood and the like to rapidly absorb menstrual blood.
- the surfactant-coated top sheet has high affinity with hydrophilic components (blood plasma etc.) in the blood, and tends to attract them and rather keep menstrual blood remaining on the top sheet.
- the above-mentioned blood slipping agent has low affinity with menstrual blood, and can be rapidly transferred to the absorber without leaving menstrual blood on the top sheet.
- the above blood slipping agent is preferably selected from the following (i) to (iii), (I) Hydrocarbons, (Ii) from a carbonyl group (-CO-) and an oxy group (-O-) inserted between (ii-1) a hydrocarbon moiety and (ii-2) a C-C single bond of the above-mentioned hydrocarbon moiety
- hydrocarbon means a compound consisting of carbon and hydrogen, and is a chain hydrocarbon, for example, paraffinic hydrocarbon (also referred to as alkane not containing double bond and triple bond) Olefinic hydrocarbons (containing one double bond, also referred to as alkenes), acetylenic hydrocarbons (containing one triple bond, also called alkynes), and a group consisting of double bonds and triple bonds And hydrocarbons containing two or more bonds selected from the following, as well as cyclic hydrocarbons such as aromatic hydrocarbons and alicyclic hydrocarbons.
- paraffinic hydrocarbon also referred to as alkane not containing double bond and triple bond
- Olefinic hydrocarbons containing one double bond, also referred to as alkenes
- acetylenic hydrocarbons containing one triple bond, also called alkynes
- hydrocarbons containing two or more bonds selected from the following, as well as cyclic hydrocarbons such as aromatic hydrocarbons and alicyclic hydrocarbons.
- the above hydrocarbon is preferably a chain hydrocarbon and an alicyclic hydrocarbon, more preferably a chain hydrocarbon, a paraffin hydrocarbon, an olefin hydrocarbon and two double bonds. It is more preferable that it is the hydrocarbon (it does not contain a triple bond) which contains above, and it is still more preferable that it is paraffin type hydrocarbon.
- the chained hydrocarbons include straight chained hydrocarbons and branched hydrocarbons.
- each oxy group (—O—) is not adjacent. Accordingly, the compounds (ii) and (iii) do not include compounds having a continuous oxy group (so-called peroxides).
- At least one hydrogen atom of the hydrocarbon moiety is more hydroxyl group (-OH than a compound in which at least one hydrogen atom of the hydrocarbon moiety is substituted with a carboxyl group (—COOH) Compounds substituted with) are preferred. This is because the carboxyl group is bonded to a metal or the like in blood, and the water retention rate of the blood slipping agent is increased to exceed the predetermined range in some cases. This is also true from the point of view of the IOB.
- the carboxyl group binds to metals and the like in the blood, and the inorganic value greatly increases from 150 to 400 or more, the blood slipping agent having the carboxyl group is used Occasionally, the value of IOB may exceed about 0.60.
- the above-mentioned blood slipping agent is more preferably the following (i ') to (iii'), (I ') hydrocarbons, (Ii ') (ii'-1) a hydrocarbon moiety, and (ii'-2) a carbonyl bond (-CO-), an ester bond (-COO) inserted between a C-C single bond of the above-mentioned hydrocarbon moiety -), A compound having one or more same or different bonds selected from the group consisting of carbonate bond (-OCOO-) and ether bond (-O-), and (iii ') (iii'-) 1) Carbonyl bond (-CO-), ester bond (-COO-), carbonate bond (-OCOO) inserted between the hydrocarbon moiety and the C-C single bond of the above-mentioned hydrocarbon moiety (iii'-2) -), And a carboxyl group (iii'-3) which substitutes a hydrogen atom of the above-mentioned hydro
- the above-mentioned blood slipping agent is more preferably, per hydrocarbon moiety, about 1.8 or less carbonyl bond (-CO-) and 2 or less ester bond (-COO-) per 10 carbon atoms, About 1.5 or less carbonate bond (-OCOO-), about 6 or less ether bond (-O-), about 0.8 or less carboxyl group (-COOH), and / or hydroxyl group (-OH) Or less).
- the above-mentioned blood slipping agent is more preferably the following (A) to (F), (A) A compound having (A1) a chain hydrocarbon moiety and 2 to 4 hydroxyl groups replacing the hydrogen atom of the chain hydrocarbon moiety, (A2) a chain hydrocarbon moiety, and the above chain Ester with a compound having one carboxyl group replacing the hydrogen atom of the cyclic hydrocarbon moiety, (B) A compound having (B1) a chain hydrocarbon moiety and 2 to 4 hydroxyl groups replacing the hydrogen atom of the chain hydrocarbon moiety, (B2) a chain hydrocarbon moiety, and the above chain Ether with a compound having one hydroxyl group replacing the hydrogen atom of the cyclic hydrocarbon moiety, (C) a carboxylic acid, hydroxy acid, alkoxy acid or oxo acid containing (C1) a chain hydrocarbon moiety and 2 to 4 carboxyl groups replacing the hydrogen atom of the chain hydrocarbon moiety; C2) an ester of a compound having a chain hydrocarbon
- (A) (A1) a compound having a chain hydrocarbon moiety and 2 to 4 hydroxyl groups replacing the hydrogen atom of the chain hydrocarbon moiety, (A2) a chain hydrocarbon moiety, and Ester with a compound having one carboxyl group replacing a hydrogen atom of a linear hydrocarbon moiety
- (A) A compound having (A1) a chain hydrocarbon moiety and 2 to 4 hydroxyl groups replacing the hydrogen atom of the chain hydrocarbon moiety, (A2) a chain hydrocarbon moiety, and the above chain Ester (hereinafter sometimes referred to as “compound (A)”) with a compound having one carboxyl group replacing the hydrogen atom of the cyclic hydrocarbon portion (hereinafter referred to as “compound (A)”) has the above-mentioned kinematic viscosity, water content and weight average As long as it has a molecular weight, not all hydroxyl groups may be esterified.
- (A1) a compound having a chain hydrocarbon portion and 2 to 4 hydroxyl groups replacing the hydrogen atom of the above chain hydrocarbon portion (hereinafter sometimes referred to as “compound (A1)”)
- chain hydrocarbon tetraols such as alkane tetraols such as pentaerythritol
- chain hydrocarbon triols such as alkanetriols such as glycerin
- chain hydrocarbon diols such as alkane diols such as Glycol is mentioned.
- (A2) As a compound having a chain hydrocarbon portion and one carboxyl group replacing the hydrogen atom of the above chain hydrocarbon portion, for example, one hydrogen atom on hydrocarbon is one carboxyl group
- Compounds substituted with (-COOH), such as fatty acids may be mentioned.
- Examples of the compound (A) include an ester of (a 1 ) chain hydrocarbon tetraol and at least one fatty acid, an ester of (a 2 ) chain hydrocarbon triol and at least one fatty acid, and (a 3 And esters of linear hydrocarbon diols and at least one fatty acid.
- the ester of the above linear hydrocarbon tetraol and at least one fatty acid may be, for example, the following formula (1): Tetraester of pentaerythritol with fatty acid, the following formula (2): Triester of pentaerythritol with fatty acid, the following formula (3): A diester of pentaerythritol with fatty acid, the following formula (4): And monoesters of fatty acid with pentaerythritol. (Wherein, R 1 to R 4 are each a chain hydrocarbon)
- esters of pentaerythritol and fatty acid have the above-mentioned kinematic viscosity, water retention and
- saturated fatty acids such as C 2 to C 30 saturated fatty acids such as acetic acid (C 2 ) (C 2 represents a carbon number), as long as the weight average molecular weight requirements are satisfied.
- propanoic acid (C 3 ), butanoic acid (C 4 ) and isomers thereof for example, 2-methylpropane Acid (C 4 ), pentanoic acid (C 5 ) and isomers thereof, such as 2-methylbutanoic acid (C 5 ), 2,2-dimethylpropanoic acid (C 5 ), hexanoic acid (C 6 ), heptanoic acid C 7), octanoate C 8) and isomers thereof, e.g., 2-ethylhexanoic acid (C 8), nonanoic acid (C 9), decanoic acid (C 10), dodecanoic acid (C 12), tetradecanoic acid (C 14), hexadecanoic acid (C 16 ), heptadecanoic acid (C 17 ), octadecanoic acid (C 18 ).
- 2-methylpropane Acid (C 4 ) pentanoic acid (C 5 ) and iso
- the fatty acids can also be unsaturated fatty acids.
- unsaturated fatty acids include C 3 -C 20 unsaturated fatty acids such as monounsaturated fatty acids such as crotonic acid (C 4 ), myristoleic acid (C 14 ), palmitoleic acid (C 16 ), Oleic acid (C 18 ), elaidic acid (C 18 ), vacenic acid (C 18 ), gadeuric acid (C 20 ), eicosenic acid (C 20 ), etc., diunsaturated fatty acids such as linoleic acid (C 18 ), Eicosadienoic acid (C 20 ), etc., triunsaturated fatty acids such as linolenic acid, eg ⁇ -linolenic acid (C 18 ) and ⁇ -linolenic acid (C 18 ), pinolenic acid (C 18 ), eleostearic acid, For example, ⁇ -eleostearic acid (C 18
- the ester of pentaerythritol and fatty acid is an ester of pentaerythritol and fatty acid derived from saturated fatty acid, that is, an ester of pentaerythritol and saturated fatty acid, in consideration of the possibility of modification by oxidation etc. preferable.
- the ester of pentaerythritol and a fatty acid is preferably a diester, a triester or a tetraester, more preferably a triester or a tetraester, from the viewpoint of reducing the water retention rate. More preferably, it is a tetraester.
- the total carbon number of fatty acids constituting the tetraester of pentaerythritol and fatty acid ie, the above In the formula (1), the total carbon number of the R 1 C, R 2 C, R 3 C and R 4 C moieties is preferably about 15 (when the total carbon number is 15, the IOB is It becomes 0.60).
- tetraesters of pentaerythritol and fatty acid include pentaerythritol, hexanoic acid (C 6 ), heptanoic acid (C 7 ), octanoic acid (C 8 ), for example, 2-ethylhexanoic acid (C 8 ), Mention may be made of tetraesters with nonanoic acid (C 9 ), decanoic acid (C 10 ) and / or dodecanoic acid (C 12 ).
- the total carbon number of fatty acids constituting the triester of pentaerythritol and fatty acid ie, the above-mentioned in the formula (2), R 1 C, in the case of R 2 C and R 3 the total number of carbons of the C moiety is preferably about 19 or more (the total number of carbon atoms is 19, IOB 0.58 ).
- the total carbon number of fatty acids constituting the diester of pentaerythritol and fatty acid ie, the above formula ( in 3)
- the total number of carbon atoms of R 1 C and R 2 C moieties where it is preferably about 22 or more (the total number of carbon atoms is 22, IOB is 0.59).
- the carbon number of the fatty acid constituting the monoester of pentaerythritol and fatty acid is preferably about 25 or more (when the carbon number is 25, the IOB is 0.60).
- the effects of double bond, triple bond, iso branch, and tert branch are not considered (the same applies hereinafter).
- esters of pentaerythritol and fatty acid examples include Unistar H-408 BRS, H-2408 BRS-22 (mixed product), etc. (all manufactured by NOF Corporation).
- the ester of glycerin and fatty acid As fatty acids (R 5 COOH, R 6 COOH and R 7 COOH) constituting the ester of glycerin and fatty acid, the ester of glycerin and fatty acid satisfies the requirements of the above-mentioned dynamic viscosity, water retention and weight average molecular weight It is not particularly limited as long as it is a fatty acid listed in “an ester of (a 1 ) chain hydrocarbon tetraol and at least one fatty acid”, that is, saturated fatty acid and unsaturated fatty acid, In consideration of the possibility of modification by oxidation or the like, an ester of glycerin and a fatty acid derived from a saturated fatty acid, that is, an ester of glycerin and a saturated fatty acid is preferable.
- the ester of glycerin and a fatty acid is preferably a diester or a triester, and more preferably a triester, from the viewpoint of reducing the water retention rate.
- triester of glycerin and fatty acid is also referred to as triglyceride, for example, triester of glycerin and octanoic acid (C 8 ), triester of glycerin and decanoic acid (C 10 ), glycerin and dodecanoic acid (C 12) And triesters of glycerin and two or three fatty acids, and mixtures thereof.
- Examples of the triester of the above glycerin and two or more fatty acids include triester of glycerin with octanoic acid (C 8 ) and decanoic acid (C 10 ), glycerin, octanoic acid (C 8 ), decane Acid (C 10 ) and triester with dodecanoic acid (C 12 ), glycerin and octanoic acid (C 8 ), decanoic acid (C 10 ), dodecanoic acid (C 12 ), tetradecanoic acid (C 14 ), hexadecanoic acid Examples thereof include triesters with (C 16 ) and octadecanoic acid (C 18 ).
- the above-mentioned triester of glycerin and fatty acid is the total carbon number of fatty acids constituting the triester of glycerin and fatty acid, ie, R 5 in formula (5) It is preferred that the total carbon number of the C, R 6 C and R 7 C moieties is about 40 or less.
- the total carbon number of fatty acids constituting the triester of glycerin and fatty acid ie, Preferably, the total carbon number of the R 5 C, R 6 C and R 7 C moieties is about 12 or more (when the total carbon number is 12, the IOB is 0.60).
- the above-mentioned triester of glycerin and a fatty acid is a so-called fat and is a component that can constitute the human body, and thus is preferable from the viewpoint of safety.
- triester of glycerin and fatty acid include trycotic oil fatty acid glyceride, NA36, panaseto 800, panaseto 800B and panaceto 810S, and tri C2L oil fatty acid glyceride and tri CL oil fatty acid glyceride (manufactured by NOF CORPORATION) Etc.).
- the above-mentioned diester of glycerin and fatty acid is also referred to as a diglyceride, for example, a diester of glycerin and decanoic acid (C 10 ), a diester of glycerin and dodecanoic acid (C 12 ), and a glycerin and hexadecanoic acid (C 16 ) Included are diesters and diesters of glycerin with two fatty acids, and mixtures thereof.
- the total carbon number of fatty acids constituting the diester of glycerin and fatty acid that is, in the formula (6)
- the total carbon number of the R 5 C and R 6 C portions is preferably about 16 or more (when the total carbon number is 16, the IOB is 0.58).
- the monoester of glycerin and fatty acid is also referred to as monoglyceride, and examples thereof include octadecanoic acid (C 18 ) monoester of glycerin, docosanoic acid (C 22 ) monoester of glycerin and the like.
- the carbon number of the fatty acid constituting the monoester of glycerin and fatty acid that is, in the formula (7)
- the carbon number of the R 5 C portion is preferably about 19 or more (when the carbon number is 19, the IOB is 0.59).
- esters of the above linear hydrocarbon diol and at least one fatty acid include C 2 to C 6 linear hydrocarbon diols, such as C 2 to C 6 glycols, such as ethylene glycol, propylene glycol, butylene And monoesters or diesters of glycol, pentylene glycol or hexylene glycol with fatty acids.
- ester of the above-mentioned chain hydrocarbon diol and at least one fatty acid for example, the following formula (8): R 8 COOC k H 2k OCOR 9 (8) (Wherein k is an integer of 2 to 6 and R 8 and R 9 are each a chain hydrocarbon) And a diester of a C 2 -C 6 glycol and a fatty acid, and the following formula (9): R 8 COOC k H 2k OH (9) (Wherein k is an integer of 2 to 6 and R 8 is a chain hydrocarbon) And monoesters of fatty acid with C 2 -C 6 glycol.
- C 2 -C 6 glycol As the fatty acid to be esterified (corresponding to R 8 COOH and R 9 COOH in formula (8) and formula (9)), C 2 -C 6 glycol is mentioned It is not particularly limited as long as it has an ester of fatty acid with the above-mentioned dynamic viscosity, water content and weight average molecular weight, for example, “(a 1 ) chain hydrocarbon tetraol and at least one fatty acid
- the fatty acids listed in the “esters” thereof namely, saturated fatty acids and unsaturated fatty acids are mentioned, and in consideration of the possibility of modification by oxidation etc., saturated fatty acids are preferred.
- the carbon number of the R 8 C and R 9 C moiety is Is preferably about 6 or more (when the total carbon number is 6, the IOB is 0.60).
- the carbon number of the R 8 C moiety is about It is preferable that it is 12 or more (when said carbon number is 12, IOB becomes 0.57).
- the ester of a C 2 ⁇ C 6 glycols and fatty acid in view of the potential for degradation by oxidation and the like, derived from saturated fatty acids, esters of C 2 ⁇ C 6 glycols and fatty acid, Nachi Suwa, C 2 It is preferably an ester of a -C 6 glycol and a saturated fatty acid.
- ester of C 2 -C 6 glycol and fatty acid an ester of glycol and fatty acid derived from glycol having a large number of carbon atoms, for example, butylene glycol, penty from the viewpoint of reducing the water retention rate. It is preferable that it is an ester of glycol derived from polyethylene glycol or hexylene glycol and fatty acid. Furthermore, as the ester of C 2 -C 6 glycol and fatty acid, it is preferable to use a diester from the viewpoint of reducing the water retention rate. Examples of commercial products of the ester of C 2 -C 6 glycol and fatty acid include Commol BL, Commol BS (manufactured by NOF Corporation) and the like.
- (B) a compound having a chain hydrocarbon moiety and 2 to 4 hydroxyl groups replacing the hydrogen atom of the chain hydrocarbon moiety, (B2) a chain hydrocarbon moiety, and Ether with compound having one hydroxyl group replacing hydrogen atom of linear hydrocarbon moiety
- (B) A compound having (B1) a chain hydrocarbon moiety and 2 to 4 hydroxyl groups replacing the hydrogen atom of the chain hydrocarbon moiety, (B2) a chain hydrocarbon moiety, and the above chain
- compound (B) As long as it has a molecular weight, not all hydroxyl groups may be etherified.
- compound (B1) a compound having a chain hydrocarbon portion and 2 to 4 hydroxyl groups replacing the hydrogen atom of the chain hydrocarbon portion (hereinafter sometimes referred to as “compound (B1)”) And those listed as the compound (A1) in the “compound (A)”, for example, pentaerythritol, glycerin and glycol.
- Examples of (B2) a compound having a chain hydrocarbon portion and one hydroxyl group replacing the hydrogen atom of the above chain hydrocarbon portion include, for example A compound in which one hydrogen atom of hydrocarbon is substituted with one hydroxyl group (—OH), such as aliphatic monohydric alcohol such as saturated aliphatic monohydric alcohol and unsaturated aliphatic monohydric alcohol Can be mentioned.
- saturated aliphatic monohydric alcohol examples include C 1 to C 20 saturated aliphatic monohydric alcohols, for example, methyl alcohol (C 1 ) (C 1 represents a carbon number, the same applies hereinafter), ethyl alcohol C 2 ), propyl alcohol (C 3 ) and its isomers, such as isopropyl alcohol (C 3 ), butyl alcohol (C 4 ) and its isomers, such as sec-butyl alcohol (C 4 ) and tert-butyl alcohol (C 4 ), pentyl alcohol (C 5 ), hexyl alcohol (C 6 ), heptyl alcohol (C 7 ), octyl alcohol (C 8 ) and isomers thereof, such as 2-ethylhexyl alcohol (C 8 ), nonyl alcohol (C 9), decyl alcohol (C 10), dodecyl alcohol (C 12), tetradecyl alcohol (C 14), Hexadecyl alcohol (C 16), to
- an ether of (b 1 ) chain hydrocarbon tetraol and at least one aliphatic monohydric alcohol for example, monoether, diether, triether and tetraether, preferably diether, triether Ethers and tetraethers, more preferably triethers and tetraethers, and still more preferably tetraethers, ethers of (b 2 ) chain hydrocarbon triol and at least one aliphatic monohydric alcohol, such as monoethers, diethers and the like Triethers, preferably diethers and triethers, and more preferably triethers, and ethers of (b 3 ) chain hydrocarbon diol and at least one aliphatic monohydric alcohol, such as monoethers and diethers, and preferably Diether It is below.
- Examples of the ether of the above linear hydrocarbon tetraol and at least one aliphatic monohydric alcohol include the following formulas (10) to (13): (Wherein, each of R 10 to R 13 is a chain hydrocarbon). And tetraethers of pentaerythritol and aliphatic monohydric alcohols, triethers, diethers and monoethers.
- Examples of the ether of the above linear hydrocarbon triol and at least one aliphatic monohydric alcohol include the following formulas (14) to (16): (Wherein, R 14 to R 16 are each a chain hydrocarbon). And triethers of glycerin and aliphatic monohydric alcohols, diethers and monoethers.
- R 17 OC n H 2n OR 18 (Wherein n is an integer of 2 to 6 and R 17 and R 18 are each a chain hydrocarbon) Diethers of C 2 -C 6 glycols and aliphatic monohydric alcohols, and the following formula (18): R 17 OC n H 2n OH (18) (Wherein n is an integer of 2 to 6 and R 17 is a chain hydrocarbon) And monoethers of C 2 -C 6 glycols and aliphatic monohydric alcohols.
- an aliphatic constituting a tetraether of pentaerythritol and aliphatic monohydric alcohol is preferably about 4 or more If the total is 4 then the IOB is 0.44).
- an aliphatic which constitutes triether of pentaerythritol and aliphatic monohydric alcohol is preferably about 9 or more (the total carbon number is 9) In this case, the IOB is 0.57).
- an aliphatic monovalent constituting the diether of pentaerythritol and aliphatic monohydric alcohol is considered.
- the sum of carbon number of alcohol that is, the sum of carbon numbers of R 10 and R 11 in the above formula (12) is preferably about 15 or more (when the total carbon number is 15, IOB Becomes 0.60).
- an aliphatic constituting a monoether of pentaerythritol and aliphatic monohydric alcohol is considered.
- the carbon number of the monohydric alcohol that is, the carbon number of the R 10 portion in the above formula (13) is preferably about 22 or more (when the carbon number is 22, the IOB is 0.59) .
- an aliphatic which constitutes triether of glycerin and aliphatic monohydric alcohol is preferably about 3 or more (the total carbon number is 3 In this case, the IOB is 0.50).
- an aliphatic monohydric alcohol constituting a diether of glycerin and aliphatic monohydric alcohol is The sum of carbon numbers, that is, the sum of carbon numbers of R 14 and R 15 in the formula (15) is preferably about 9 or more (when the sum of carbon numbers is 9, IOB is 0. It becomes 58).
- an aliphatic monohydric component constituting monoether of glycerin and aliphatic monohydric alcohol is considered.
- the carbon number of the alcohol that is, the carbon number of the R 14 portion in the formula (16) is preferably about 16 or more (when the carbon number is 16, the IOB is 0.58).
- the R 17 and R 18 moieties
- the total number of carbons is preferably about 2 or more (when the total number of carbons is 2, the IOB is 0.33).
- the R 17 moiety is The number of carbon atoms is preferably about 8 or more (when the number of carbon atoms is 8, the IOB is 0.60).
- the compound (B) can be produced by dehydration condensation of the compound (B1) and the compound (B2) in the presence of an acid catalyst.
- (C1) a linear hydrocarbon moiety and a carboxylic acid, a hydroxy acid, an alkoxy acid or an oxo acid
- C1 may be, for example, a linear hydrocarbon carboxylic acid having 2 to 4 carboxyl groups, such as a linear hydrocarbon dicarboxylic acid, such as an alkanedicarboxylic acid, such as ethanedioic acid Propanedioic acid, butanedioic acid, pentanedioic acid, hexanedioic acid, heptanedioic acid, octanedioic acid, nonanedioic acid and decanedioic acid, linear hydrocarbon tricarboxylic acids such as alkanetricarboxylic acids such as propane tricarboxy
- a linear hydrocarbon hydroxy acid having 2 to 4 carboxyl groups for example, a linear chain having 2 to 4 carboxyl groups, such as malic acid, tartaric acid, citric acid, isocitric acid, etc.
- Hydrocarbon alkoxy acids such as O-acetylcitric acid, and linear hydrocarbon oxoacids with 2 to 4 carboxyl groups are included.
- Examples of the compound having a (C2) linear hydrocarbon moiety and one hydroxyl group replacing the hydrogen atom of the linear hydrocarbon moiety include those listed in the “compound (B)”, for example, Aliphatic monohydric alcohols are mentioned.
- an ester of (c 1 ) chain hydrocarbon tetracarboxylic acid having 4 carboxyl groups, a hydroxy acid, an alkoxy acid or an oxo acid, and at least one aliphatic monohydric alcohol for example, Mono-, di-, tri- and tetra-esters, preferably diesters, tri- and tetra-esters, more preferably tri- and tetra-esters, and still more preferably tetra-esters, chained with 3 (c 2 ) carboxyl groups
- Esters of hydrocarbon tricarboxylic acids, hydroxy acids, alkoxy acids or oxo acids with at least one aliphatic monohydric alcohol such as monoesters, diesters and triesters, preferably diesters and triesters, and more preferably triesters ,
- the above-mentioned ether has the requirements of the above-mentioned dynamic viscosity, water content and weight average molecular weight
- the material is not particularly limited as long as it satisfies the conditions, and examples thereof include aliphatic monohydric alcohols listed in the section “Compound (B)”.
- dialkyl ketone As said dialkyl ketone, following Formula (20): R 21 COR 22 (20) (Wherein, each of R 21 and R 22 is an alkyl group) And compounds having the formula:
- the above-mentioned dialkyl ketone is commercially available, and can be obtained by a known method, for example, by oxidizing a secondary alcohol with chromic acid or the like.
- Examples of the fatty acid (corresponding to R 23 COOH in formula (21)) constituting the above-mentioned ester include fatty acids listed in “ester of (a 1 ) chain hydrocarbon tetraol and fatty acid”, ie, And saturated fatty acids or unsaturated fatty acids, and in view of the possibility of modification by oxidation etc., saturated fatty acids are preferred.
- Examples of the aliphatic monohydric alcohol (corresponding to R 24 OH in the formula (21)) constituting the above-mentioned ester include, for example, aliphatic monohydric alcohols listed in the “compound (B)” section.
- esters of the above fatty acids and aliphatic monohydric alcohols include, for example, esters of dodecanoic acid (C 12 ), dodecyl alcohol (C 12 ), tetradecanoic acid (C 14 ), and dodecyl alcohol (C 12 ) And the like.
- esters of commercially available esters of fatty acid and aliphatic monohydric alcohol include Electol WE20 and Electol WE40 (all manufactured by NOF Corporation).
- the dialkyl carbonate is commercially available, and can be synthesized by the reaction of phosgene with alcohol, the reaction of formic acid chloride ester with alcohol or alcoholate, and the reaction of silver carbonate with alkyl iodide.
- the weight average molecular weight is preferably about 100 or more, and more preferably about 200 or more.
- the total carbon number is about 8, for example, 5-nonanone
- the melting point is about ⁇ 50 ° C.
- the vapor pressure is about 230 Pa at 20 ° C.
- Examples of (E) polyoxy C 3 -C 6 alkylene glycol, or an alkyl ester or alkyl ether thereof include (e 1 ) polyoxy C 3 -C 6 alkylene glycol, (e 2 ) Esters of polyoxy C 3 -C 6 alkylene glycol and at least one fatty acid, and (e 3 ) ethers of polyoxy C 3 -C 6 alkylene glycol and at least one aliphatic monohydric alcohol. This will be described below.
- the above polyoxy C 3 -C 6 alkylene glycol has the following formula (23): HO- (C m H 2m O) n -H (23) (In the formula, m is an integer of 3 to 6) Is represented by
- Examples of commercial products of the above poly C 3 -C 6 alkylene glycols include Uniol (trademark) PB-500 and PB-700 (all manufactured by NOF Corporation).
- ester of (e 2 ) polyoxy C 3 -C 6 alkylene glycol with at least one fatty acid is the OH terminal of the polyoxy C 3 -C 6 alkylene glycol described in the section “(e 1 ) polyoxy C 3 -C 6 alkylene glycol”. And one or both of which are esterified with a fatty acid, that is, monoesters and diesters.
- the fatty acid to be esterified is, for example, listed in “ester of (a 1 ) chain hydrocarbon tetraol and at least one fatty acid”.
- Fatty acids that is, saturated fatty acids or unsaturated fatty acids, and in view of the possibility of modification by oxidation etc., saturated fatty acids are preferred.
- aliphatic monohydric alcohol in the ether of polyoxy C 3 -C 6 alkylene glycol and at least one aliphatic monohydric alcohol, as aliphatic monohydric alcohol to be etherified, for example, aliphatic listed in the “compound (B)” section Monohydric alcohol is mentioned.
- chain hydrocarbon examples include (f 1 ) chain alkanes such as straight chain alkanes and branched chain alkanes.
- Linear alkanes have a carbon number of about 22 or less when the melting point is about 45 ° C. or less, and a carbon number of about 13 when the vapor pressure is about 0.01 Pa or less at 1 atmosphere and 25 ° C. It becomes above.
- Branched alkanes tend to have lower melting points at the same carbon number than linear alkanes.
- branched alkanes can also contain those having 22 or more carbons, even when the melting point is about 45 ° C. or less.
- Pearl Reem 6 (NOF Corporation) is mentioned, for example.
- a blood slipping agent-containing composition containing a blood slipping agent and at least one other component may be used.
- the blood slipping agent-containing composition will be described.
- the blood slipping agent-containing composition contains the above-described blood slipping agent and at least one other component.
- the at least one other component is not particularly limited as long as it does not inhibit the effects of the present disclosure, and includes those conventionally applied in the art to absorbent articles, particularly to a top sheet.
- the at least one other component include silicone oil, silicone, silicone resin, and the like.
- the at least one other component include an antioxidant such as BHT (2,6-di-t-butyl-p-cresol), BHA (butylated hydroxyanisole), propyl gallate and the like.
- the at least one other ingredient may include, for example, vitamins, such as natural or synthetic vitamins.
- vitamins such as natural or synthetic vitamins.
- examples of the above-mentioned vitamins include water-soluble vitamins such as vitamin B group, for example, vitamin B 1 , vitamin B 2 , vitamin B 3 , vitamin B 5 , vitamin B 6 , vitamin B 7 , vitamin B 9 and vitamin B 12 Etc., vitamin C is mentioned.
- examples of the vitamin include fat-soluble vitamins such as vitamin A group, vitamin D group, vitamin E group, and vitamin K group.
- the above vitamins also include their derivatives.
- the at least one other component includes, for example, amino acids such as alanine, arginine, lysine, histidine, proline, hydroxyproline and the like, as well as peptides.
- the at least one other component includes, for example, zeolites, such as natural zeolites, such as, for example, zeolite, chabazite, chabazite, fluorite, natrolite, ocholite and somsonite, and synthetic zeolite.
- zeolites such as natural zeolites, such as, for example, zeolite, chabazite, chabazite, fluorite, natrolite, ocholite and somsonite
- synthetic zeolite examples include cholesterol, hyaluronic acid, lecithin, ceramide and the like.
- a drug such as a skin astringent agent, an anti-acne agent, an anti-wrinkle agent, an anti-cellulite agent, a whitening agent, an antibacterial agent, an antifungal agent and the like
- a drug such as a skin astringent agent, an anti-acne agent, an anti-wrinkle agent, an anti-cellulite agent, a whitening agent, an antibacterial agent, an antifungal agent and the like
- the skin astringent agent include oil-soluble skin astringent agents such as zinc oxide, aluminum sulfate, tannic acid and the like, for example, oil-soluble polyphenols.
- oil-soluble polyphenols such as, for example, ginseng extract, hyperglossia extract, red ginseng extract, kamomira extract, burdock extract, salvia extract, linseed extract, horsetail extract, birch extract, sugina extract, sage extract, salvia extract And tea extract extract, hibiscus extract, loquat leaf extract, body oil extract, hop extract, marronier extract, yokinin extract and the like.
- anti-acne agent examples include salicylic acid, benzoyl peroxide, resorcinol, sulfur, erythromycin, zinc and the like.
- anti-wrinkle agent examples include lactic acid, salicylic acid, salicylic acid derivatives, glycolic acid, phytic acid, lipoic acid and lysophosphatidic acid.
- anti-cellulite agent examples include xanthine compounds such as aminophylline, caffeine, theophylline, theobromine and the like.
- xanthine compounds such as aminophylline, caffeine, theophylline, theobromine and the like.
- examples of the above-mentioned whitening agent include niacinamide, kojic acid, arbutin, glucosamine and derivatives, phytosterol derivatives, ascorbic acid and its derivatives, and mulberry extract and placenta extract.
- an anti-inflammatory component for example, an anti-inflammatory component, a pH adjuster, an antibacterial agent, a moisturizer, a fragrance, a pigment, a dye, a pigment, a plant extract and the like
- the anti-inflammatory component include naturally-occurring anti-inflammatory agents such as, for example, button, gogon, hyperglossia, chamomile, licorice, pokeweed, mugwort, perilla extract and the like, synthetic anti-inflammatory agents such as allantoin and dipotassium glycyrrhizinate
- the pH adjuster include those for keeping the skin weakly acidic, such as malic acid, succinic acid, citric acid, tartaric acid, lactic acid and the like.
- the pigment include titanium oxide.
- the blood slipping agent-containing composition preferably comprises about 50 to about 99% by weight and about 1 to about 50% by weight, more preferably about 50 to about 99% by weight of the blood slipping agent and at least one other component, respectively.
- the blood slipping agent-containing composition preferably contains a surfactant in an amount equal to or less than the amount derived from the hydrophilization treatment of the top sheet or the second sheet. More specifically, the blood slipping agent-containing composition preferably contains a surfactant, preferably about 0.0 to about 1.0 g / m 2 , more preferably about 0.0 to about 0.8 g / m 2 . m 2, and more preferably from in the range of from about 0.1 to about 0.5 g / m 2, and even more preferably a basis weight of from about 0.1 to about 0.3 g / m 2. This is because menstrual blood tends to remain on the top sheet as the amount of surfactant increases. The surfactant does not have a water retention value. This is because there is no layer of the substance to be measured because it is miscible with water.
- the above blood slipping agent-containing composition preferably contains water, preferably about 0.0 to about 1.0 g / m 2 , more preferably about 0.0 to about 0.8 g / m 2 , still more preferably about 0 And a basis weight ranging from about 1 to about 0.5 g / m 2 , and even more preferably about 0.1 to about 0.3 g / m 2 . Water is preferably low to reduce the absorption performance of the absorbent article.
- the above-described blood slipping agent-containing composition preferably has a kinematic viscosity of about 0 to about 80 mm 2 / s at 40 ° C. as a composition, and about 1 to about 70 mm. It is more preferred to have a kinematic viscosity of 2 / s, even more preferred to have a kinematic viscosity of about 3 to about 60 mm 2 / s, and even more preferred to have a kinematic viscosity of about 5 to about 50 mm 2 / s, And it is even more preferable to have a kinematic viscosity of about 7 to about 45 mm 2 / s.
- the kinematic viscosity of the above-described blood slipping agent-containing composition exceeds about 80 mm 2 / s, the viscosity is high, and along with the menstrual blood reaching the skin contact surface of the top sheet, the blood slipping agent composition is absorbable It is because it tends to be difficult to slide down inside the article.
- the other components preferably have a weight of less than about 1,000. It has an average molecular weight, and more preferably has a weight average molecular weight of less than about 900.
- the weight average molecular weight is about 1,000 or more, the blood slipping agent-containing composition itself has tackiness, which tends to make the wearer uncomfortable.
- the weight average molecular weight is high, the viscosity of the blood slipping agent-containing composition tends to increase, so that the viscosity of the blood slipping agent composition is lowered to a viscosity suitable for application by heating. Can be difficult, and as a result, the blood slipping agent may occur if it has to be diluted with a solvent.
- the blood slipping agent-containing composition as a composition has a water retention rate of about 0.01 to about 4.0% by mass, and a water retention rate of about 0.02 to about 3.5% by mass. It is preferable to have a water content of about 0.03 to about 3.0% by mass, more preferably about 0.04 to about 2.5% by mass, and It is further preferred to have a water retention of about 0.05 to about 2.0% by weight. When the water retention rate becomes low, affinity between the blood slipping agent composition and menstrual blood decreases, and menstrual blood that has reached the skin contact surface of the top sheet is less likely to slip into the interior of the absorbent article. Tend. In addition, when the said blood slipping agent containing composition contains a solid substance, it is preferable to remove them by filtration in measurement of dynamic viscosity and a water retention rate.
- the top sheet preferably contains the blood slipping agent, preferably about 1 to about 30 g / m 2 , more preferably about 2 to about 20 g / m 2 , and still more preferably about 3 to about 10 g It includes in the range of the basis weight of / m 2 .
- the basis weight of the blood slipping agent is less than about 1 g / m 2 , absorbed menses tend to remain on the top sheet, and the basis weight of the blood slipping agent exceeds about 30 g / m 2 And, there is a tendency for the feeling of wearing to increase.
- the basis weight of the blood slipping agent contained in the top sheet can be measured as follows. (1) A sample is obtained by cutting out the range to be measured of the top sheet using a sharp blade, for example, a replaceable blade of a cutter so as not to change its thickness as much as possible. (2) Measure the area of the sample: SA (m 2 ) and the mass: SM 0 (g). (3) The sample is stirred in a solvent capable of dissolving the blood slipping agent such as ethanol, acetone or the like for at least 3 minutes to dissolve the blood slipping agent in the solvent.
- a solvent capable of dissolving the blood slipping agent such as ethanol, acetone or the like for at least 3 minutes to dissolve the blood slipping agent in the solvent.
- BBS (g / m 2 ) [SM 0 (g) -SM 1 (g)] / SA (m 2 ) Calculated by
- a plurality of samples are collected from a plurality of absorbent articles so that the total area of the samples exceeds 100 cm 2 , the experiment is repeated a plurality of times, and their average value is adopted.
- the material to which the blood slipping agent is applied for example, when the top sheet is a non-woven fabric or woven fabric made of a synthetic resin, an apertured film, etc., these have a hydrophilic agent coated on their surface, or It is preferable that the resin is hydrophilicized by being mixed with a synthetic resin or a film.
- the hydrophilic property of the original material the lipophilic region derived from the blood slipping agent and the hydrophilic region derived from the hydrophilic agent coexist sparsely on the top sheet, and menstrual blood, It is because it becomes easy to make it slide to a crevice from a convex part of a top sheet, and to make it shift to an absorber next.
- the above-described blood slipping agent or blood slipping agent-containing composition can be coated as a coating solution containing a volatile solvent such as an alcohol solvent, an ester solvent, an aromatic solvent and the like, if desired.
- a volatile solvent such as an alcohol solvent, an ester solvent, an aromatic solvent and the like.
- the application of the above-described blood slipping agent or blood slipping agent-containing composition or a coating solution containing the same is not particularly limited, and the above-described blood slipping agent or blood slipping can be provided as necessary.
- the composition containing the agent or the coating liquid containing the same is heated, for example, using a non-contact coater, for example, a coating apparatus such as a spiral coater, curtain coater, spray coater, dip coater, contact coater, etc.
- the above-described blood slipping agent or blood slipping agent-containing composition, or a coating solution containing the same can be applied.
- a noncontact coater is preferable from the viewpoint that the modifier in the form of droplets or particles is uniformly dispersed in the whole and from the viewpoint of not damaging the material.
- the above-described blood slipping agent or blood slipping agent-containing composition, or a coating solution containing the same is heated at room temperature as it is when it is liquid or heated to lower its viscosity, and when it is solid at room temperature It can be heated to liquify and applied from a control seam HMA (Hot Melt Adhesive) gun.
- a control seam HMA Hot Melt Adhesive
- the application amount of the blood modifying agent or blood slipping agent-containing composition can be adjusted, for example, by increasing or decreasing the amount of application from the control seam HMA gun.
- the above-mentioned blood slipping agent can be applied when producing the material of the top sheet, for example, a non-woven fabric, or can be applied at a production line for producing an absorbent article. From the viewpoint of suppressing equipment investment, it is preferable to apply a blood slipping agent in the production line of the absorbent article, and further to prevent the blood slipping agent from falling off and contaminating the line. Preferably, the blood slipping agent is applied downstream of the production line, specifically, immediately before the product is enclosed in an individual package.
- the above-mentioned blood slipping agent can also act as a lubricant. Therefore, when the top sheet is a non-woven fabric, the blood slipping agent can reduce the friction between fibers and improve the flexibility of the whole non-woven fabric. In addition, when the top sheet is a resin film, the blood slipping agent can reduce the friction between the top sheet and the skin.
- the absorbent article of the present disclosure is intended to absorb blood, such as sanitary napkins, panty liners and the like.
- the absorbent article of the present disclosure does not require components such as an emollient agent, a fixing agent, etc., unlike absorbent articles including known skin care compositions, lotion compositions, etc. Alone, it can be applied to the top sheet.
- a blood slipping agent may be applied to at least a region where the diffusion sheet 5 is provided.
- Triethylene CL oil fatty acid glycerides, manufactured by NOF Corporation C 8 fatty acid: fatty acid of C 12 is approximately included in a weight ratio of 44:56, triesters of glycerin and fatty acid, the weight average molecular weight: about 570
- -Panaceto 800 B manufactured by NOF Corporation Triester of glycerin and fatty acid in which all fatty acids are 2-ethylhexanoic acid (C 8 ), weight average molecular weight: about 470 NA36, manufactured by NOF Corporation C 16 fatty acids: C 18 fatty acids: C 20 fatty acids (including both saturated fatty acids and unsaturated fatty acids) in a weight ratio of approximately 5: 92: 3, Triester of glycerin and fatty acid, weight average molecular weight: about 880
- Tricot oil fatty acid glyceride manufactured by NOF Corporation C 8 fatty acid: C 10 fatty acid: C 12 fatty acid: C 14 fatty acid: C 16 fatty acid (including both saturated fatty acid and unsaturated fatty acid) is approximately 4 Triester of glycerin and fatty acid, contained in a weight ratio of 8: 60: 25: 3, weight average molecular weight: 670 ⁇ Caprylic diglyceride, manufactured by NOF Corporation Diester of glycerin and fatty acid wherein fatty acid is octanoic acid, weight average molecular weight: 340
- Uniol PB500 polybutylene glycol manufactured by NOF Corporation, weight average molecular weight: about 500
- Uniol PB700 manufactured by NOF Corporation, polyoxybutylene polyoxypropylene glycol, weight average molecular weight: about 700
- weight average molecular weight about 880 (Caprylic acid / capric acid) monoglyceride, monoester of glycerin and fatty acid, which contains octanoic acid (C 8 ) and decanoic acid (C 10 ) manufactured by NOF Corporation at
- Uniol D-400 a polypropylene glycol manufactured by NOF Corporation, weight average molecular weight: about 400 Uniol D-700, a polypropylene glycol manufactured by NOF Corporation, weight average molecular weight: about 700 Uniol D-1000, a polypropylene glycol manufactured by NOF Corporation, weight average molecular weight: about 1,000 Uniol D-1200, polypropylene glycol manufactured by NOF Corporation, weight average molecular weight: about 1,160
- Uniol D-2000 a polypropylene glycol manufactured by NOF Corporation, weight average molecular weight: about 2,030 Uniol D-3000, a polypropylene glycol manufactured by NOF Corporation, weight average molecular weight: about 3,000 Uniol D-4000, polypropylene glycol manufactured by NOF Corporation, weight average molecular weight: about 4,000
- -PEG 1500 polyethylene glycol manufactured by NOF Corporation, weight average molecular weight: about 1,500 to about 1,600 ⁇ Wilbright cp 9, a compound in which OH groups at both ends of polybutylene glycol manufactured by NOF Corporation were esterified with hexadecanoic acid (C 16 ), weight average molecular weight: about 1,150 ⁇ Unileub MS-70K, stearyl ether of polypropylene glycol manufactured by NOF Corporation, about 15 repeating units, weight average molecular weight: about 1,140
- Nonion S-6 manufactured by NOF Corporation, polyoxyethylene monostearate, repeating unit of about 7 weight average molecular weight: about 880 ⁇ Unileve 5TP-300KB Polyoxyethylene polyoxypropylene pentaerythritol ether, weight average molecular weight: 4,130, produced by adding 5 moles of ethylene oxide and 65 moles of propylene oxide to 1 mole of pentaerythritol.
- UNIOL TG-1000 glyceryl ether of polypropylene glycol manufactured by NOF Corporation, about 16 repeating units, weight average molecular weight: about 1,000 ⁇ UNIOL TG-3000, glyceryl ether of polypropylene glycol manufactured by NOF Corporation, about 16 repeating units, weight average molecular weight: about 3,000 ⁇ UNIOL TG-4000, glyceryl ether of polypropylene glycol manufactured by NOF Corporation, about 16 repeating units, weight average molecular weight: about 4,000
- Unirube DGP-700 a diglyceryl ether of polypropylene glycol manufactured by NOF Corporation, about 9 repeating units, weight average molecular weight: about 700 -Uniox HC60, manufactured by NOF Co., Ltd. polyoxyethylene hydrogenated castor oil, weight average molecular weight: about 3,570 ⁇ Vaseline, Cognis Japan Ltd. Petroleum derived hydrocarbon, semi-solid
- Example 1 [Persistence rate of menstrual blood when absorbing a large amount of blood A] An experiment was conducted to evaluate the absorbability when the sanitary napkin absorbs a large amount of blood at one time.
- the top sheet is a top sheet having a ridged groove structure manufactured according to the method described in JP 2008-2034 A.
- the thickness of the ridged part is about 1.5 mm, and the thickness of the grooved part is about 0.
- the pitch of the ridge and groove structure was about 4 mm, and in the groove portion, a hole having a hole area ratio of about 15% was formed.
- H-408 BRS manufactured by NOF Corporation, tetraester of pentaerythritol and fatty acid
- the skin contact surface of the top sheet ⁇ ⁇ ⁇
- the groove surface was coated at a basis weight of 5.0 g / m 2 .
- H-408 BRS was in the form of fine particles and adhered to the surface of the fiber.
- the back sheet, the absorbent body, the second sheet, and the top sheet are sequentially stacked with the ridged surface up, sanitary napkin No. 1 It formed 1-1.
- the blood slipping agent was changed from Unistar H-408 BRS to that shown in Table 2, and sanitary napkin No. 1-2 to No. 1-49 were manufactured. If the blood slipping agent is liquid at room temperature, heat as it is, and if the blood slipping agent is solid at room temperature, heat to a melting point + 20 ° C, and then use a control seam HMA gun. The blood slipping agent was atomized and applied to the skin contact surface of the top sheet so that the basis weight was approximately 5 g / m 2 . In addition, the blood slipping agent was applied to almost the entire surface of the skin contact surface of the top sheet, and to both the ridges and grooves.
- Top sheet weight After measuring W 2 (g) (weight of top sheet before test), an acrylic plate with holes opened on the center of the absorbent article in the longitudinal direction and width direction and on the top sheet ( Place a 200 mm ⁇ 100 mm, 125 g, 40 mm ⁇ 10 mm hole in the center, and from the above hole, equine EDTA blood at 37 ⁇ 1 ° C. (to the blood of the horse, for prevention of coagulation ethylenediaminetetraacetic acid (In which "EDTA" was added) (4.0 g) was dropped using a pipette.
- W 2 weight of top sheet before test
- an acrylic plate with holes opened on the center of the absorbent article in the longitudinal direction and width direction and on the top sheet Place a 200 mm ⁇ 100 mm, 125 g, 40 mm ⁇ 10 mm hole in the center, and from the above hole, equine EDTA blood at 37 ⁇ 1 ° C. (to the blood of the horse, for prevention of coagulation
- tackiness of the skin contact surface of the top sheet was measured at 35 ° C. according to the following criteria. ⁇ : no tackiness ⁇ : some tackiness ⁇ : tackiness
- FIG. 8 shows an electron micrograph of the skin contact surface of the top sheet in the sanitary napkin in which the top sheet contains avian C2L oil fatty acid glyceride.
- Sanitary napkin No. 1 having no blood slipping agent.
- the surface residual rate A was 7.5% by mass
- the sanitary napkin No. 1-1 to No. It is suggested that menstrual blood can be rapidly transferred from the top sheet to the absorber when a large amount of menstrual blood reaches the top sheet at one time.
- a top sheet (hereinafter sometimes referred to as "the top sheet having ridges") formed of an air through non-woven fabric (composite fiber made of polyester and polyethylene terephthalate, basis weight: 35 g / m 2 ) treated with a hydrophilic agent
- a second sheet formed of an air through non-woven fabric (composite fiber made of polyester and polyethylene terephthalate, basis weight: 30 g / m 2 ), pulp (basis weight: 150 to 450 g / m 2 , more in the central part), acrylic type
- An absorbent containing an absorbent polymer (basis weight: 15 g / m 2 ) and a tissue as a core wrap, a water repellent-treated side sheet, and a back sheet comprising a polyethylene film were prepared.
- the top sheet is a top sheet having a ridged groove structure manufactured according to the method described in JP 2008-2034 A.
- the thickness of the ridged part is about 1.5 mm, and the thickness of the grooved part is about 0.
- the pitch of the ridge and groove structure was about 4 mm, and in the groove portion, a hole having a hole area ratio of about 15% was formed.
- H-408 BRS manufactured by NOF Corporation, tetraester of pentaerythritol and fatty acid
- the skin contact surface of the top sheet ⁇ ⁇ ⁇
- the groove surface was coated at a basis weight of 5.0 g / m 2 .
- H-408 BRS was in the form of fine particles and adhered to the surface of the fiber.
- the back sheet, the absorbent body, the second sheet, and the top sheet are sequentially stacked with the ridged surface up, sanitary napkin No. 1 Form 2-1 (i).
- Top sheet (hereinafter referred to as "flat") formed of a flat, hydrophilic agent-treated non-woven air-through non-woven fabric (composite fiber made of polyester and polyethylene terephthalate, basis weight: 35 g / m 2 ) having no ridge and groove structure (Sometimes referred to as “top sheet”) except for the sanitary napkin No. In the same manner as 2-1 (i), sanitary napkin No. Form 2-1 (ii).
- the blood slipping agent was changed from Unistar H-408 BRS to that shown in Table 3, and sanitary napkin No. 2-2 (i) to no. 2-11 (i) and no. 2-2 (ii) to no. 2-11 (ii) were manufactured. If the blood slipping agent is liquid at room temperature, heat as it is, and if the blood slipping agent is solid at room temperature, heat to a melting point + 20 ° C, and then use a control seam HMA gun. The blood slipping agent was atomized and applied to the skin contact surface of the top sheet so that the basis weight was approximately 5 g / m 2 . In addition, the blood slipping agent was applied to almost the entire surface of the skin contact surface of the top sheet, and in the case of the top sheet having the furrow structure, on both the groin and the groove.
- Top sheet weight After measuring W 4 (g) (the weight of the top sheet before testing), 37 ⁇ 1 ° C. horse EDTA blood on the central top sheet in the longitudinal direction and width direction of the absorbent article About 0.25 g (2 drops) was dropped from the pipette. In the top sheet having a furrow, equine EDTA blood was dropped on the top of the buttocks.
- Example 3 [Viscosity of blood containing blood slipping agent] The viscosity of the blood containing the blood slipping agent was measured using Rheometric Expansion System ARES (Rheometric Scientific, Inc). 2% by weight of Panaceto 810s was added to equine defibrinated blood, the mixture was lightly stirred to form a sample, the sample was loaded on a parallel plate of 50 mm in diameter, the gap was made 100 ⁇ m, and the viscosity was measured at 37 ⁇ 0.5 ° C. . Because of the parallel plate, the sample was not subjected to a uniform shear rate, but the average shear rate displayed on the instrument was 10 s ⁇ 1 .
- the viscosity of equine defibrinated blood containing 2% by mass of Panaceto 810s was 5.9 mPa ⁇ s, while the viscosity of equine defibrillated blood containing no blood slipping agent was 50.4 mPa ⁇ s. Accordingly, it can be seen that equine defibrinated blood containing 2% by mass of Panaceto 810s reduces the viscosity by about 90% as compared to the case without the blood slipping agent.
- Blood contains components such as blood cells and is known to have thixotropy properties, but the blood slipping agent of the present disclosure also has the effect of lowering the viscosity of blood such as menstrual blood in a low viscosity region. It is considered to have. By reducing the viscosity of blood, it is considered that absorbed menstrual blood is likely to be rapidly transferred from the top sheet to the absorber.
- Example 4 [Micrograph of blood containing blood slipping agent] A healthy volunteer's menstrual blood is collected on a food protection wrap film, and a portion of it is Panaceto 810s dispersed in 10 times the mass of phosphate buffered saline, and the concentration of Panaceto 810s is 1% by mass. It added so that it might become. The menstrual blood was applied to a slide glass, covered with a cover glass, and the condition of red blood cells was observed with a light microscope. A photomicrograph of menstrual blood containing no blood slipping agent is shown in FIG. 9 (a), and a photomicrograph of menstrual blood containing PANACET 810s is shown in FIG. 9 (b).
- red blood cells form a lump of ritsusen etc., but in menstrual blood containing PANACET 810s, the red blood cells are dispersed stably. I understand that. Therefore, it is suggested that the blood slipping agent also has the function of stabilizing red blood cells in blood.
- Example 5 [Surface tension of blood containing blood slipping agent] The surface tension of blood containing a blood slipping agent was measured by a pendant drop method using a contact angle meter Drop Master 500 manufactured by Kyowa Interface Science. The surface tension was measured after adding a predetermined amount of a blood slipping agent to sheep defibrinated blood and shaking sufficiently. The measurement is automatically performed by the device, but the surface tension ⁇ is obtained by the following equation (see FIG. 10).
- the density ⁇ is 5 of “density test method and density / mass / volume conversion table” of JIS K 2249-1995. It was measured at the temperature shown in Table 4 below according to the vibrational density test method. For measurement, DA-505 of Kyoto Electronics Industries Ltd. was used. The results are shown in Table 4 below.
- the blood slipping agent also has the effect of lowering the surface tension of blood.
- the surface tension of the blood it is considered that the absorbed blood can be rapidly transferred to the absorber without being held between the fibers of the top sheet.
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Abstract
Description
(1)請求項1の発明の吸収性物品は、肌側に設けられた液透過性のトップシートと、着衣側に設けられた液不透過性のバックシートと、トップシートおよびバックシートの間に設けられた液保持性の吸収体と、トップシートおよび吸収体の間に設けられ、かつ吸収体が設けられている領域内に設けられた第1のシートと、第1のシートおよび吸収体の間に設けられた第2のシートとを含み、第1のシートは、液透過性を有するとともに液保持性を有し、第2のシートは、液透過性を有するが液保持性を有さず、吸収体に吸収された経血の赤色を隠ぺいする。
(2)請求項2の発明は、請求項1に記載の吸収性物品において、第1のシートが設けられている領域は、排泄口当接域を含む。
(3)請求項3の発明は、請求項1または2に記載の吸収性物品において、第1のシートは、50重量%以上のセルロース系繊維を含む。
(4)請求項4の発明は、請求項1~3のいずれか1項に記載の吸収性物品において、第2のシートは、50重量%以上の熱可塑性化学繊維を含む。
(5)請求項5の発明は、請求項1~4のいずれか1項に記載の吸収性物品において、吸収体の面積に対する第1のシートの面積の割合は、10~90%である。
(6)請求項6の発明は、請求項1~5のいずれか1項に記載の吸収性物品において、第2のシートが設けられている領域は、第1のシートが設けられている領域を含み、第1のシートの面積に対する第2のシートの面積の割合は、110%以上であり、吸収体の面積に対する第2のシートの面積の割合は、150%以下である。
(7)請求項7の発明は、請求項1~6のいずれか1項に記載の吸収性物品において、厚さ方向に突出する中高部を有し、中高部において、第1のシートおよび第2のシートとの間にクッション部を含み、クッション部は、3~30mmの最大厚みを有し、
クッション部は、複数の繊維を含み、複数の繊維の交点が熱融着されている。
(8)請求項8の発明は、請求項7に記載の吸収性物品において、中高部は、40℃における0.01~80mm2/sの動粘度と、0.01~4.0質量%の抱水率と、1,000未満の重量平均分子量とを有する血液滑性付与剤を含む。
(9)請求項9の発明は、請求項8に記載の吸収性物品において、血液滑性付与剤が、0.00~0.60のIOBをさらに有する。
(10)請求項10の発明は、請求項8または9に記載の吸収性物品において、血液滑性付与剤が、次の(i)~(iii)、
(i)炭化水素、
(ii) (ii-1)炭化水素部分と、(ii-2)炭化水素部分のC-C単結合間に挿入された、カルボニル基(-CO-)及びオキシ基(-O-)から成る群から選択される、一又は複数の、同一又は異なる基とを有する化合物、及び
(iii) (iii-1)炭化水素部分と、(iii-2)炭化水素部分のC-C単結合間に挿入された、カルボニル基(-CO-)及びオキシ基(-O-)から成る群から選択される、一又は複数の、同一又は異なる基と、(iii-3)炭化水素部分の水素原子を置換する、カルボキシル基(-COOH)及びヒドロキシル基(-OH)から成る群から選択される、一又は複数の、同一又は異なる基とを有する化合物、
並びにそれらの任意の組み合わせから成る群から選択され、
ここで、(ii)又は(iii)の化合物において、オキシ基が2つ以上挿入されている場合には、各オキシ基は隣接していない。
(11)請求項11の発明は、請求項8~10のいずれか1項に記載の吸収性物品において、血液滑性付与剤が、次の(i’)~(iii’)、
(i’)炭化水素、
(ii’) (ii’-1)炭化水素部分と、(ii’-2)炭化水素部分のC-C単結合間に挿入された、カルボニル結合(-CO-)、エステル結合(-COO-)、カーボネート結合(-OCOO-)、及びエーテル結合(-O-)から成る群から選択される、一又は複数の、同一又は異なる結合とを有する化合物、及び
(iii’) (iii’-1)炭化水素部分と、(iii’-2)炭化水素部分のC-C単結合間に挿入された、カルボニル結合(-CO-)、エステル結合(-COO-)、カーボネート結合(-OCOO-)、及びエーテル結合(-O-)から成る群から選択される、一又は複数の、同一又は異なる結合と、(iii’-3)炭化水素部分の水素原子を置換する、カルボキシル基(-COOH)及びヒドロキシル基(-OH)から成る群から選択される、一又は複数の、同一又は異なる基とを有する化合物、
並びにそれらの任意の組み合わせから成る群から選択され、
ここで、(ii’)又は(iii’)の化合物において、2以上の同一又は異なる結合が挿入されている場合には、各結合は隣接していない。
(12)請求項12の発明は、請求項8~11のいずれか1項に記載の吸収性物品において、血液滑性付与剤が、次の(A)~(F)、
(A) (A1)鎖状炭化水素部分と、鎖状炭化水素部分の水素原子を置換する2~4個のヒドロキシル基とを有する化合物と、(A2)鎖状炭化水素部分と、鎖状炭化水素部分の水素原子を置換する1個のカルボキシル基とを有する化合物とのエステル、
(B) (B1)鎖状炭化水素部分と、鎖状炭化水素部分の水素原子を置換する2~4個のヒドロキシル基とを有する化合物と、(B2)鎖状炭化水素部分と、鎖状炭化水素部分の水素原子を置換する1個のヒドロキシル基とを有する化合物とのエーテル、
(C) (C1)鎖状炭化水素部分と、鎖状炭化水素部分の水素原子を置換する、2~4個のカルボキシル基とを含むカルボン酸、ヒドロキシ酸、アルコキシ酸又はオキソ酸と、(C2)鎖状炭化水素部分と、鎖状炭化水素部分の水素原子を置換する1個のヒドロキシル基とを有する化合物とのエステル、
(D)鎖状炭化水素部分と、鎖状炭化水素部分のC-C単結合間に挿入された、エーテル結合(-O-)、カルボニル結合(-CO-)、エステル結合(-COO-)、及びカーボネート結合(-OCOO-)から成る群から選択されるいずれか1つの結合とを有する化合物、
(E)ポリオキシC3~C6アルキレングリコール、又はそのアルキルエステル若しくはアルキルエーテル、及び
(F)鎖状炭化水素、
並びにそれらの任意の組み合わせから成る群から選択される。
(13)請求項13の発明は、請求項8~12のいずれか1項に記載の吸収性物品において、血液滑性付与剤が、(a1)鎖状炭化水素テトラオールと少なくとも1の脂肪酸とのエステル、(a2)鎖状炭化水素トリオールと少なくとも1の脂肪酸とのエステル、(a3)鎖状炭化水素ジオールと少なくとも1の脂肪酸とのエステル、(b1)鎖状炭化水素テトラオールと少なくとも1の脂肪族1価アルコールとのエーテル、(b2)鎖状炭化水素トリオールと少なくとも1の脂肪族1価アルコールとのエーテル、(b3)鎖状炭化水素ジオールと少なくとも1の脂肪族1価アルコールとのエーテル、(c1)4個のカルボキシル基を有する鎖状炭化水素テトラカルボン酸、ヒドロキシ酸、アルコキシ酸又はオキソ酸と、少なくとも1の脂肪族1価アルコールとのエステル、(c2)3個のカルボキシル基を有する鎖状炭化水素トリカルボン酸、ヒドロキシ酸、アルコキシ酸又はオキソ酸と、少なくとも1の脂肪族1価アルコールとのエステル、(c3)2個のカルボキシル基を有する鎖状炭化水素ジカルボン酸、ヒドロキシ酸、アルコキシ酸又はオキソ酸と、少なくとも1の脂肪族1価アルコールとのエステル、(d1)脂肪族1価アルコールと脂肪族1価アルコールとのエーテル、(d2)ジアルキルケトン、(d3)脂肪酸と脂肪族1価アルコールとのエステル、(d4)ジアルキルカーボネート、(e1)ポリオキシC3~C6アルキレングリコール、(e2)ポリオキシC3~C6アルキレングリコールと少なくとも1の脂肪酸とのエステル、(e3)ポリオキシC3~C6アルキレングリコールと少なくとも1の脂肪族1価アルコールとのエーテル、及び(f1)鎖状アルカン、並びにそれらの任意の組み合わせから成る群から選択される。
(14)請求項14の発明は、請求項8~13のいずれか1項に記載の吸収性物品において、血液滑性付与剤が、1気圧及び40℃において、0.00~0.01Paの蒸気圧を有する。
以下、図面を参照して、本発明の第1の実施形態における吸収性物品を説明する。しかし、本発明は図面に記載されたものに限定されるものではない。本発明の第1の実施形態における吸収性物品は生理ナプキンである。
以下、図面を参照して、本発明の第2の実施形態における吸収性物品を説明する。しかし、本発明は図面に記載されたものに限定されるものではない。本発明の第2の実施形態における吸収性物品は生理ナプキンである。
(1)2次元レーザー変位計を用いて、測定すべき位置のクッション部の厚さt(cm)を測定する。上記2次元レーザー変位計としては、たとえば、キーエンス株式会社製 高精度2次元レーザー変位計 LJ-Gシリーズ(型式:LJ-G030)が挙げられる。なお、測定すべき位置のクッション部16Aの厚さは、測定すべき位置の吸収性物品1Aの厚さから、クッション部16Aの存在しない領域、すなわち、中高部14Aを囲む周囲部142Aにおける吸収性物品1Aの厚さを減ずることにより算出することができる。
(3)密度d(g/cm3)を、下記式:
d=b/(10,000×t)
に従って算出する。
本開示の吸収性物品において、液透過性のトップシートが、少なくとも凸部に、40℃における約0.01~約80mm2/sの動粘度と、約0.05~約4.0質量%の抱水率と、約1,000未満の重量平均分子量とを有する血液滑性付与剤を含む。
上記動粘度は、a)血液滑性付与剤の分子量が大きくなるほど、b)極性基、例えば、カルボニル結合(-CO-)、エーテル結合(-O-)、カルボキシル基(-COOH)、ヒドロキシル基(-OH)等の比率が高いほど、そしてc)IOBが大きくなるほど、高くなる傾向がある。
なお、本明細書では、40℃における動粘度を、単に「動粘度」と称する場合がある。
(1)40℃の恒温室に、20mLの試験管、ゴム栓、測定すべき物質及び脱イオン水を一昼夜静置する。
(2)上記恒温室で、試験管に、測定すべき物質5.0gと、脱イオン水5.0gを投入する。
(3)上記恒温室で、試験管の口をゴム栓にて栓し、試験管を1回転させ、5分間静置する。
(5)上記シャーレを、オーブン内で、105℃で3時間加熱し、水分を蒸発させ、シャーレごと、質量:W1(g)を測定する。
(6)抱水率を、以下の式に従って算出する。
抱水率(質量%)=100×[W0(g)-W1(g)]/3.0(g)
測定は3回実施し、平均値を採用する。
Mw=ΣNiMi 2/ΣNiMi
により求められるMwを意味する。
GPCの測定条件としては、例えば、以下が挙げられる。
機種:(株)日立ハイテクノロジーズ製 高速液体クロマトグラム Lachrom Elite
カラム:昭和電工(株)製 SHODEX KF-801、KF-803及びKF-804
溶離液:THF
流量 :1.0mL/分
打込み量:100μL
検出:RI(示差屈折計)
なお、本明細書の実施例に記載される重量平均分子量は、上記条件により測定したものである。
IOB(Inorganic Organic Balance)は、親水性及び親油性のバランスを示す指標であり、本明細書では、小田らによる次式:
IOB=無機性値/有機性値
により算出される値を意味する。
藤田氏による、主要な基の有機性値及び無機性値を、下記表1にまとめる。
(i)炭化水素、
(ii) (ii-1)炭化水素部分と、(ii-2)上記炭化水素部分のC-C単結合間に挿入された、カルボニル基(-CO-)及びオキシ基(-O-)から成る群から選択される、一又は複数の、同一又は異なる基とを有する化合物、及び
(iii) (iii-1)炭化水素部分と、(iii-2)上記炭化水素部分のC-C単結合間に挿入された、カルボニル基(-CO-)及びオキシ基(-O-)から成る群から選択される、一又は複数の、同一又は異なる基と、(iii-3)上記炭化水素部分の水素原子を置換する、カルボキシル基(-COOH)及びヒドロキシル基(-OH)から成る群から選択される、一又は複数の、同一又は異なる基とを有する化合物、
並びにそれらの任意の組み合わせから成る群から選択される。
上記鎖状炭化水素には、直鎖状炭化水素及び分岐鎖状炭化水素が含まれる。
(i’)炭化水素、
(ii’) (ii’-1)炭化水素部分と、(ii’-2)上記炭化水素部分のC-C単結合間に挿入された、カルボニル結合(-CO-)、エステル結合(-COO-)、カーボネート結合(-OCOO-)、及びエーテル結合(-O-)から成る群から選択される、一又は複数の、同一又は異なる結合とを有する化合物、及び
(iii’) (iii’-1)炭化水素部分と、(iii’-2)上記炭化水素部分のC-C単結合間に挿入された、カルボニル結合(-CO-)、エステル結合(-COO-)、カーボネート結合(-OCOO-)、及びエーテル結合(-O-)から成る群から選択される、一又は複数の、同一又は異なる結合と、(iii’-3)上記炭化水素部分の水素原子を置換する、カルボキシル基(-COOH)及びヒドロキシル基(-OH)から成る群から選択される、一又は複数の、同一又は異なる基とを有する化合物、
並びにそれらの任意の組み合わせから成る群から選択される。
(A) (A1)鎖状炭化水素部分と、上記鎖状炭化水素部分の水素原子を置換する2~4個のヒドロキシル基とを有する化合物と、(A2)鎖状炭化水素部分と、上記鎖状炭化水素部分の水素原子を置換する1個のカルボキシル基とを有する化合物とのエステル、
(B) (B1)鎖状炭化水素部分と、上記鎖状炭化水素部分の水素原子を置換する2~4個のヒドロキシル基とを有する化合物と、(B2)鎖状炭化水素部分と、上記鎖状炭化水素部分の水素原子を置換する1個のヒドロキシル基とを有する化合物とのエーテル、
(C) (C1)鎖状炭化水素部分と、上記鎖状炭化水素部分の水素原子を置換する、2~4個のカルボキシル基とを含むカルボン酸、ヒドロキシ酸、アルコキシ酸又はオキソ酸と、(C2)鎖状炭化水素部分と、上記鎖状炭化水素部分の水素原子を置換する1個のヒドロキシル基とを有する化合物とのエステル、
(D)鎖状炭化水素部分と、上記鎖状炭化水素部分のC-C単結合間に挿入された、エーテル結合(-O-)、カルボニル結合(-CO-)、エステル結合(-COO-)、及びカーボネート結合(-OCOO-)から成る群から選択されるいずれか1つの結合とを有する化合物、
(E)ポリオキシC3~C6アルキレングリコール、又はそのアルキルエステル若しくはアルキルエーテル、及び
(F)鎖状炭化水素、
並びにそれらの任意の組み合わせから成る群から選択される。
以下、(A)~(F)に従う血液滑性付与剤について詳細に説明する。
(A)(A1)鎖状炭化水素部分と、上記鎖状炭化水素部分の水素原子を置換する2~4個のヒドロキシル基とを有する化合物と、(A2)鎖状炭化水素部分と、上記鎖状炭化水素部分の水素原子を置換する1個のカルボキシル基とを有する化合物とのエステル(以下、「化合物(A)」と称する場合がある)は、上述の動粘度、抱水率及び重量平均分子量を有する限り、全てのヒドロキシル基がエステル化されていなくともよい。
化合物(A)としては、例えば、(a1)鎖状炭化水素テトラオールと少なくとも1の脂肪酸とのエステル、(a2)鎖状炭化水素トリオールと少なくとも1の脂肪酸とのエステル、及び(a3)鎖状炭化水素ジオールと少なくとも1の脂肪酸とのエステルが挙げられる。
上記鎖状炭化水素テトラオールと少なくとも1の脂肪酸とのエステルとしては、例えば、次の式(1):
(式中、R1~R4は、それぞれ、鎖状炭化水素である)
また、上記ペンタエリトリトールと脂肪酸とのエステルとしては、抱水率の値を小さくする観点から、ジエステル、トリエステル又はテトラエステルであることが好ましく、トリエステル又はテトラエステルであることがより好ましく、そしてテトラエステルであることがさらに好ましい。
なお、上記IOBの計算に当たっては、二重結合、三重結合、iso分岐、及びtert分岐の影響は、考慮していない(以下、同様である)。
上記鎖状炭化水素トリオールと少なくとも1の脂肪酸とのエステルとしては、例えば、次の式(5):
のグリセリンと脂肪酸とのモノエステルが挙げられる。
上記グリセリンと脂肪酸とのトリエステルは、いわゆる、脂肪であり、人体を構成しうる成分であるため、安全性の観点から好ましい。
上記鎖状炭化水素ジオールと少なくとも1の脂肪酸とのエステルとしては、例えば、C2~C6の鎖状炭化水素ジオール、例えば、C2~C6のグリコール、例えば、エチレングリコール、プロピレングリコール、ブチレングリコール、ペンチレングリコール又はヘキシレングリコールと、脂肪酸とのモノエステル又はジエステルが挙げられる。
R8COOCkH2kOCOR9 (8)
(式中、kは、2~6の整数であり、そしてR8及びR9は、それぞれ、鎖状炭化水素である)
のC2~C6グリコールと脂肪酸とのジエステル、及び次の式(9):
R8COOCkH2kOH (9)
(式中、kは、2~6の整数であり、そしてR8は、鎖状炭化水素である)
のC2~C6グリコールと脂肪酸とのモノエステルが挙げられる。
さらに、上記C2~C6グリコールと脂肪酸とのエステルとしては、抱水率の値を小さくする観点から、ジエステルであることが好ましい。
上記C2~C6グリコールと脂肪酸とのエステルの市販品としては、例えば、コムポールBL、コムポールBS(以上、日油株式会社製)等が挙げられる。
(B) (B1)鎖状炭化水素部分と、上記鎖状炭化水素部分の水素原子を置換する2~4個のヒドロキシル基とを有する化合物と、(B2)鎖状炭化水素部分と、上記鎖状炭化水素部分の水素原子を置換する1個のヒドロキシル基とを有する化合物とのエーテル(以下、「化合物(B)」と称する場合がある)は、上述の動粘度、抱水率及び重量平均分子量を有する限り、全てのヒドロキシル基がエーテル化されていなくともよい。
の、ペンタエリトリトールと脂肪族1価アルコールとのテトラエーテル、トリエーテル、ジエーテル及びモノエーテルが挙げられる。
の、グリセリンと脂肪族1価アルコールとのトリエーテル、ジエーテル及びモノエーテルが挙げられる。
R17OCnH2nOR18 (17)
(式中、nは、2~6の整数であり、そしてR17及びR18は、それぞれ、鎖状炭化水素である)
のC2~C6グリコールと脂肪族1価アルコールとのジエーテル、及び次の式(18):
R17OCnH2nOH (18)
(式中、nは、2~6の整数であり、そしてR17は、鎖状炭化水素である)
のC2~C6グリコールと脂肪族1価アルコールとのモノエーテルが挙げられる。
また、IOBを約0.00~約0.60とする観点から考察すると、式(18)に示されるエチレングリコール(n=2)と脂肪族1価アルコールとのモノエーテルでは、R17部分の炭素数が、約8以上であることが好ましい(上記炭素数が8の場合に、IOBが0.60となる)。
(C) (C1)鎖状炭化水素部分と、上記鎖状炭化水素部分の水素原子を置換する、2~4個のカルボキシル基とを含むカルボン酸、ヒドロキシ酸、アルコキシ酸又はオキソ酸と、(C2)鎖状炭化水素部分と、上記鎖状炭化水素部分の水素原子を置換する1個のヒドロキシル基とを有する化合物とのエステル(以下、「化合物(C)」と称する場合がある)は、上述の動粘度、抱水率及び重量平均分子量を有する限り、全てのカルボキシル基がエステル化されていなくともよい。
(C2)鎖状炭化水素部分と、上記鎖状炭化水素部分の水素原子を置換する1個のヒドロキシル基とを有する化合物としては、「化合物(B)」の項で列挙されるもの、例えば、脂肪族1価アルコールが挙げられる。
化合物(C)の例としては、アジピン酸ジオクチル、O-アセチルクエン酸トリブチル等が挙げられ、そして市販されている。
(D)鎖状炭化水素部分と、上記鎖状炭化水素部分のC-C単結合間に挿入された、エーテル結合(-O-)、カルボニル結合(-CO-)、エステル結合(-COO-)、及びカーボネート結合(-OCOO-)から成る群から選択されるいずれか1つの結合とを有する化合物(以下、「化合物(D)」と称する場合がある)としては、(d1)脂肪族1価アルコールと脂肪族1価アルコールとのエーテル、(d2)ジアルキルケトン、(d3)脂肪酸と脂肪族1価アルコールとのエステル、及び(d4)ジアルキルカーボネートが挙げられる。
上記脂肪族1価アルコールと脂肪族1価アルコールとのエーテルとしては、次の式(19):
R19OR20 (19)
(式中、R19及びR20は、それぞれ、鎖状炭化水素である)
を有する化合物が挙げられる。
上記ジアルキルケトンとしては、次の式(20):
R21COR22 (20)
(式中、R21及びR22は、それぞれ、アルキル基である)
を有する化合物が挙げられる。
上記ジアルキルケトンは、市販されている他、公知の方法、例えば、第二級アルコールを、クロム酸等で酸化することにより得ることができる。
上記脂肪酸と脂肪族1価アルコールとのエステルとしては、例えば、次の式(21):
R23COOR24 (21)
(式中、R23及びR24は、それぞれ、鎖状炭化水素である)
を有する化合物が挙げられる。
上記ジアルキルカーボネートとしては、次の式(22):
R25OC(=O)OR26 (22)
(式中、R25及びR26は、それぞれ、アルキル基である)
を有する化合物が挙げられる。
上記ジアルキルカーボネートは、市販されている他、ホスゲンとアルコールとの反応、塩化ギ酸エステルとアルコール又はアルコラートとの反応、及び炭酸銀とヨウ化アルキルとの反応により合成することができる。
なお、(d2)ジアルキルケトンにおいて、上記炭素数の合計が約8の場合、例えば、5-ノナノンでは、融点は約-50℃であり、蒸気圧は20℃で約230Paである。
(E)ポリオキシC3~C6アルキレングリコール、又はそのアルキルエステル若しくはアルキルエーテル(以下、化合物(E)と称する場合がある)としては、(e1)ポリオキシC3~C6アルキレングリコール、(e2)ポリオキシC3~C6アルキレングリコールと少なくとも1の脂肪酸とのエステル、(e3)ポリオキシC3~C6アルキレングリコールと少なくとも1の脂肪族1価アルコールとのエーテルが挙げられる。以下、説明する。
上記ポリオキシC3~C6アルキレングリコールは、i)オキシC3~C6アルキレン骨格、すなわち、オキシプロピレン骨格、オキシブチレン骨格、オキシペンチレン骨格、及びオキシヘキシレン骨格から成る群から選択されるいずれか1種の骨格を有し且つ両末端にヒドロキシ基を有するホモポリマー、ii)上記群から選択される2種以上の骨格を有し且つ両末端にヒドロキシ基を有するブロックコポリマー、又はiii)上記群から選択される2種以上の骨格を有し且つ両末端にヒドロキシ基を有するランダムコポリマーを意味する。
HO-(CmH2mO)n-H (23)
(式中、mは3~6の整数である)
により表わされる。
上記ポリオキシC3~C6アルキレングリコールと少なくとも1の脂肪酸とのエステルとしては、「(e1)ポリオキシC3~C6アルキレングリコール」の項で説明したポリオキシC3~C6アルキレングリコールのOH末端の一方又は両方が、脂肪酸によりエステル化されているもの、すなわち、モノエステル及びジエステルが挙げられる。
上記ポリオキシC3~C6アルキレングリコールと少なくとも1の脂肪族1価アルコールとのエーテルとしては、「(e1)ポリオキシC3~C6アルキレングリコール」の項で説明したポリオキシC3~C6アルキレングリコールのOH末端の一方又は両方が、脂肪族1価アルコールによりエーテル化されているもの、すなわち、モノエーテル及びジエーテルが挙げられる。
ポリオキシC3~C6アルキレングリコールと少なくとも1の脂肪族1価アルコールとのエーテルにおいて、エーテル化すべき脂肪族1価アルコールとしては、例えば、「化合物(B)」の項で列挙されている脂肪族1価アルコールが挙げられる。
上記鎖状炭化水素としては、例えば、(f1)鎖状アルカン、例えば、直鎖アルカン及び分岐鎖アルカンが挙げられる。直鎖アルカンは、融点が約45℃以下の場合には、炭素数が約22以下となり、そして蒸気圧が1気圧及び25℃で約0.01Pa以下である場合には、炭素数が約13以上となる。分岐鎖アルカンは、直鎖アルカンよりも、同一炭素数において融点が低い傾向がある。従って、分岐鎖アルカンは、融点が約45℃以下の場合でも、炭素数が22以上のものも含むことができる。
上記炭化水素の市販品としては、例えば、パールリーム6(日油株式会社)が挙げられる。
以下、血液滑性付与剤含有組成物について説明する。
血液滑性付与剤含有組成物は、上述の血液滑性付与剤と、少なくとも1種の他の成分とを含む。上記少なくとも1種の他の成分としては、本開示の効果を阻害しないものであれば特に制限されず、当業界で吸収性物品、特にトップシートに慣用的に適用されるものが挙げられる。
上記少なくとも1種の他の成分としては、例えば、シリコーンオイル、シリコーン、シリコーン系レジン等が挙げられる。
上記少なくとも1種の他の成分としては、例えば、酸化防止剤、例えば、BHT(2,6-ジ-t-ブチル-p-クレゾール)、BHA(ブチル化ヒドロキシアニソール)、没食子酸プロピル等が挙げられる。
上記ビタミンとしては、例えば、脂溶性ビタミン、例えば、ビタミンA群、ビタミンD群、ビタミンE群、およびビタミンK群等が挙げられる。
上記ビタミンにはまた、それらの誘導体も含まれる。
上記少なくとも1種の他の成分としては、例えば、コレステロール、ヒアルロン酸、レシチン、セラミド等が挙げられる。
上記皮膚収斂剤としては、例えば、酸化亜鉛、硫酸アルミニウム、タンニン酸等、油溶性皮膚収斂剤、例えば、油溶性ポリフェノールが挙げられる。上記油溶性ポリフェノールとしては、天然の油溶性ポリフェノール、例えば、オオバクエキス、オトギリソウエキス、オドリコソウエキス、カモミラエキス、ゴボウエキス、サルビアエキス、シナノキエキス、セイヨウボダイジュエキス、シラカバエキス、スギナエキス、セージエキス、サルビアエキス、テウチグルミエキス、ハイビスカスエキス、ビワ葉エキス、ボダイジュエキス、ホップエキス、マロニエエキス、ヨクイニンエキス等が挙げられる。
上記抗シワ剤としては、例えば、乳酸、サリチル酸、サリチル酸誘導体、グリコール酸、フィチン酸、リポ酸、リソフォスファチド酸が挙げられる。
上記美白剤としては、例えば、ナイアシンアミド、コウジ酸、アルブチン、グルコサミン及び誘導体、フィトステロール誘導体、アスコルビン酸及びその誘導体、並びにクワ抽出物及び胎盤抽出物が挙げられる。
上記pH調整剤としては、皮膚を弱酸性に保つためのもの、例えば、リンゴ酸、コハク酸、クエン酸、酒石酸、乳酸等が挙げられる。
上記顔料としては、例えば、酸化チタンが挙げられる。
界面活性剤の量が増えると、経血がトップシートに残存しやすい傾向があるからである。なお、界面活性剤は、抱水率の値を有しない。水と混和するため、測定すべき物質の層が存在しないからである。
水は、吸収性物品の吸収性能を低下させるため、少ないことが好ましい。
上記血液滑性付与剤含有組成物の動粘度が約80mm2/sを超えると、粘性が高く、トップシートの肌当接面に到達した経血と共に、血液滑性付与剤組成物が吸収性物品の内部に滑落することが難しくなる傾向があるからである。
上記抱水率が低くなると、血液滑性付与剤組成物と、経血との親和性が低下し、トップシートの肌当接面に到達した経血が吸収性物品の内部に滑落しにくくなる傾向がある。
なお、上記血液滑性付与剤含有組成物が固形物を含む場合には、動粘度及び抱水率の測定において、それらを濾過により取り除くことが好ましい。
(1)トップシートの測定すべき範囲を、鋭利な刃物、例えば、カッターの替え刃を用いて、できるだけその厚さを変化させないように切り出して、サンプルを得る。
(2)サンプルの面積:SA(m2)及び質量:SM0(g)を測定する。
(3)サンプルを、血液滑性付与剤を溶解させることができる溶媒、例えば、エタノール、アセトン等の中で、少なくとも3分間攪拌し、血液滑性付与剤を溶媒中に溶解させる。
(5)ろ紙及びサンプルの質量を測定し、そこからろ紙の質量を減ずることにより、乾燥後のサンプルの質量:SM1(g)を算出する。
(6)血液滑性付与剤の坪量BBS(g/m2)を、次の式:
BBS(g/m2)=[SM0(g)-SM1(g)]/SA(m2)
により算出する。
なお、誤差を少なくするために、サンプルの総面積が100cm2を超えるように、複数の吸収性物品から複数のサンプルを採取し、複数回実験を繰り返し、それらの平均値を採用する。
なお、血液改質付与剤又は血液滑性付与剤含有組成物の塗布量は、例えば、コントロールシームHMAガンからの塗出量を増減することにより調節することができある。
なお、本開示の吸収性物品は、公知のスキンケア組成物、ローション組成物等を含む吸収性物品とは異なり、エモリエント剤、固定化剤等の成分が不要であり、血液滑性付与剤は、単体で、トップシートに適用されうる。
以下に、実験に用いられた血液滑性付与剤を列挙する。
[(a1)鎖状炭化水素テトラオールと少なくとも1の脂肪酸とのエステル]
・ユニスター H-408BRS,日油株式会社製
テトラ2-エチルヘキサン酸ペンタエリトリトール,重量平均分子量:約640
・ユニスター H-2408BRS-22,日油株式会社製
テトラ2-エチルヘキサン酸ペンタエリトリトールと、ジ2-エチルヘキサン酸ネオペンチルグリコールとの混合物(58:42、重量比),重量平均分子量:約520
・トリC2L油脂肪酸グリセリド,日油株式会社製
C8の脂肪酸:C10の脂肪酸:C12の脂肪酸がおおよそ37:7:56の重量比で含まれている、グリセリンと脂肪酸とのトリエステル,重量平均分子量:約570
・トリCL油脂肪酸グリセリド,日油株式会社製
C8の脂肪酸:C12の脂肪酸がおおよそ44:56の重量比で含まれている、グリセリンと脂肪酸とのトリエステル,重量平均分子量:約570
C8の脂肪酸:C10の脂肪酸がおおよそ85:15の重量比で含まれている、グリセリンと脂肪酸とのトリエステル,重量平均分子量:約480
・パナセート800,日油株式会社製
脂肪酸が全てオクタン酸(C8)である、グリセリンと脂肪酸とのトリエステル,重量平均分子量:約470
脂肪酸が全て2-エチルヘキサン酸(C8)である、グリセリンと脂肪酸とのトリエステル,重量平均分子量:約470
・NA36,日油株式会社製
C16の脂肪酸:C18の脂肪酸:C20の脂肪酸(飽和脂肪酸及び不飽和脂肪酸の両方を含む)がおおよそ5:92:3の重量比で含まれている、グリセリンと脂肪酸とのトリエステル,重量平均分子量:約880
C8の脂肪酸:C10の脂肪酸:C12の脂肪酸:C14の脂肪酸:C16の脂肪酸(飽和脂肪酸及び不飽和脂肪酸の両方を含む)がおおよそ4:8:60:25:3の重量比で含まれている、グリセリンと脂肪酸とのトリエステル,重量平均分子量:670
・カプリル酸ジグリセリド,日油株式会社製
脂肪酸がオクタン酸である、グリセリンと脂肪酸とのジエステル,重量平均分子量:340
・ユニスター H-208BRS,日油株式会社製
ジ2-エチルヘキサン酸ネオペンチルグリコール,重量平均分子量:約360
・コムポールBL,日油株式会社製
ブチレングリコールのドデカン酸(C12)モノエステル,重量平均分子量:約270
・コムポールBS,日油株式会社製
ブチレングリコールのオクタデカン酸(C18)モノエステル,重量平均分子量:約350
・O-アセチルクエン酸トリブチル,東京化成工業株式会社製
重量平均分子量:約400
・クエン酸トリブチル,東京化成工業株式会社製
重量平均分子量:約360
・アジピン酸ジオクチル,和光純薬工業製
重量平均分子量:約380
・エレクトールWE20,日油株式会社製
ドデカン酸(C12)と、ドデシルアルコール(C12)とのエステル,重量平均分子量:約360
・エレクトールWE40,日油株式会社製
テトラデカン酸(C14)と、ドデシルアルコール(C12)とのエステル,重量平均分子量:約390
・ユニオールPB500,日油株式会社製
ポリブチレングリコール,重量平均分子量:約500
・ユニオールPB700,日油株式会社製
ポリオキシブチレンポリオキシプロピレングリコール,重量平均分子量:約700
・パールリーム6,日油株式会社製
流動イソパラフィン、イソブテン及びn-ブテンを共重合し、次いで水素を付加することにより生成された分岐鎖炭化水素、重合度:約5~約10,重量平均分子量:約330
・NA50,日油株式会社製
NA36に水素を付加し、原料である不飽和脂肪酸に由来する二重結合の比率を下げたグリセリンと脂肪酸とのトリエステル,重量平均分子量:約880
・(カプリル酸/カプリン酸)モノグリセリド,日油株式会社製
オクタン酸(C8)及びデカン酸(C10)がおおよそ85:15の重量比で含まれている、グリセリンと脂肪酸とのモノエステル,重量平均分子量:約220
・Monomuls 90-L2ラウリン酸モノグリセリド,コグニスジャパン株式会社製
重量平均分子量:約230
・リンゴ酸ジイソステアリル
重量平均分子量:約640
・ユニオールPB1000R,日油株式会社製
ポリブチレングリコール,重量平均分子量:約1,000
・ユニオールD-250,日油株式会社製
ポリプロピレングリコール,重量平均分子量:約250
ポリプロピレングリコール,重量平均分子量:約400
・ユニオールD-700,日油株式会社製
ポリプロピレングリコール,重量平均分子量:約700
・ユニオールD-1000,日油株式会社製
ポリプロピレングリコール,重量平均分子量:約1,000
・ユニオールD-1200,日油株式会社製
ポリプロピレングリコール,重量平均分子量:約1,160
ポリプロピレングリコール,重量平均分子量:約2,030
・ユニオールD-3000,日油株式会社製
ポリプロピレングリコール,重量平均分子量:約3,000
・ユニオールD-4000,日油株式会社製
ポリプロピレングリコール,重量平均分子量:約4,000
ポリエチレングリコール,重量平均分子量:約1,500~約1,600
・ウィルブライトcp9,日油株式会社製
ポリブチレングリコールの両末端のOH基が、ヘキサデカン酸(C16)によりエステル化された化合物,重量平均分子量:約1,150
・ユニルーブMS-70K,日油株式会社製
ポリプロピレングリコールのステアリルエーテル,約15の繰返し単位,重量平均分子量:約1,140
ポリオキシエチレンモノステアレート、約7の繰返し単位、重量平均分子量:約880
・ユニルーブ5TP-300KB
ペンタエリトリトール1モルに、エチレンオキシド5モルと、プロピレンオキシド65モルとを付加させることにより生成した、ポリオキシエチレンポリオキシプロピレンペンタエリスリトールエーテル,重量平均分子量:4,130
ポリオキシエチレンポリオキシプロピレンポリオキシブチレングリセリン,重量平均分子量:約960
・ユニオール TG-330,日油株式会社製
ポリプロピレングリコールのグリセリルエーテル,約6の繰返し単位,重量平均分子量:約330
ポリプロピレングリコールのグリセリルエーテル,約16の繰返し単位,重量平均分子量:約1,000
・ユニオール TG-3000,日油株式会社製
ポリプロピレングリコールのグリセリルエーテル,約16の繰返し単位,重量平均分子量:約3,000
・ユニオール TG-4000,日油株式会社製
ポリプロピレングリコールのグリセリルエーテル,約16の繰返し単位,重量平均分子量:約4,000
ポリプロピレングリコールのジグリセリルエーテル,約9の繰返し単位,重量平均分子量:約700
・ユニオックスHC60,日油株式会社製
ポリオキシエチレン硬化ヒマシ油,重量平均分子量:約3,570
・ワセリン,コグニスジャパン株式会社製
石油に由来する炭化水素、半固形
[大量の血液を吸収した際の経血の表面残存率A]
生理用ナプキンが一度に大量の血液を吸収した場合の吸収性を評価する実験を行った。
親水剤で処理されたエアスルー不織布(ポリエステル及びポリエチレンテレフタレートから成る複合繊維、坪量:35g/m2)から形成されたトップシートと、エアスルー不織布(ポリエステル及びポリエチレンテレフタレートから成る複合繊維、坪量:30g/m2)から形成されたセカンドシートと、パルプ(坪量:150~450g/m2、中央部ほど多い)、アクリル系高吸収ポリマー(坪量:15g/m2)及びコアラップとしてのティッシュを含む吸収体と、撥水剤処理されたサイドシートと、ポリエチレンフィルムから成るバックシートとを準備した。
次いで、バックシート、吸収体、セカンドシート、そして畝溝面を上にしてトップシートを順に重ね合わせることにより、生理用ナプキンNo.1-1を形成した。
また、血液滑性付与剤は、トップシートの肌当接面のほぼ全面に、そして畝部及び溝部の両方に塗工された。
トップシートの質量:W2(g)(試験前のトップシートの質量)を測定した後、吸収性物品の長手方向及び幅方向の中央部且つトップシートの上に、穴の開いたアクリル板(200mm×100mm,125g,中央に、40mm×10mmの穴が開いている)を置き、上記穴から、37±1℃のウマEDTA血(ウマの血液に、凝結防止のため、エチレンジアミン四酢酸(以下、「EDTA」と称する)が添加されたもの)4.0gを、ピペットを用いて滴下した。
表面残存率A(質量%)
=100×[W3(g)-W2(g)]/4.0(g)
○:タック性なし
△:若干のタック性有り
×:タック性有り
[少量の血液を吸収した際の経血の表面残存率B]
生理用ナプキンが少量の血液を吸収した場合の吸収性を評価する実験を行った。
親水剤で処理されたエアスルー不織布(ポリエステル及びポリエチレンテレフタレートから成る複合繊維、坪量:35g/m2)から形成されたトップシート(以下、「畝溝を有するトップシート」と称する場合がある)と、エアスルー不織布(ポリエステル及びポリエチレンテレフタレートから成る複合繊維、坪量:30g/m2)から形成されたセカンドシートと、パルプ(坪量:150~450g/m2、中央部ほど多い)、アクリル系高吸収ポリマー(坪量:15g/m2)及びコアラップとしてのティッシュを含む吸収体と、撥水剤処理されたサイドシートと、ポリエチレンフィルムから成るバックシートとを準備した。
次いで、バックシート、吸収体、セカンドシート、そして畝溝面を上にしてトップシートを順に重ね合わせることにより、生理用ナプキンNo.2-1(i)を形成した。
また、血液滑性付与剤は、トップシートの肌当接面のほぼ全面に、そして畝溝構造を有するトップシートでは、畝部及び溝部の両方に塗工された。
トップシートの質量:W4(g)(試験前のトップシートの質量)を測定した後、吸収性物品の長手方向及び幅方向の中央のトップシートの上に、37±1℃のウマEDTA血約0.25g(2滴)をピペットから滴下した。なお、畝溝を有するトップシートでは、畝部の頂部にウマEDTA血を滴下した。
表面残存率B(質量%)
=100×(W5(g)-W4(g))/W6(g)
なお、W6(g)は、滴下前後のピペットの質量から算出した、滴下されたウマEDTA血の質量である。
結果を、下記表3に示す。
[血液滑性付与剤を含む血液の粘性]
血液滑性付与剤を含む血液の粘性を、Rheometric Expansion System ARES(Rheometric Scientific,Inc)を用いて測定した。ウマ脱繊維血に、パナセート810sを2質量%添加し、軽く撹拌して試料を形成し、直径50mmのパラレルプレートに試料を載せ、ギャップを100μmとし、37±0.5℃で粘度を測定した。パラレルプレートゆえ、試料に均一なせん断速度はかかっていないが、機器に表示された平均せん断速度は、10s-1であった。
[血液滑性付与剤を含む血液の顕微鏡写真]
健常ボランティアの経血を、食品保護用ラップフィルム上に採取し、その一部に、10倍の質量のリン酸緩衝生理食塩水中に分散されたパナセート810sを、パナセート810sの濃度が1質量%となるように添加した。経血を、スライドグラスに適下し、カバーグラスをかけ、光学顕微鏡にて、赤血球の状態を観察した。血液滑性付与剤を含まない経血の顕微鏡写真を図9(a)に、そしてパナセート810sを含む経血の顕微鏡写真を図9(b)に示す。
[血液滑性付与剤を含む血液の表面張力]
血液滑性付与剤を含む血液の表面張力を、協和界面科学社製接触角計 Drop Master500を用い、ペンダントドロップ法にて測定した。表面張力は、ヒツジ脱繊維血に、所定の量の血液滑性付与剤を添加し、十分振とうした後に測定した。
測定は、機器が自動で行うが、表面張力γは、以下の式により求められる(図10を参照)。
g:重力定数
1/H:ds/deから求められる補正項
ρ:密度
de:最大直径
ds:滴下端よりdeだけ上がった位置での径
測定には、京都電子工業株式会社のDA-505を用いた。
結果を、下記表4に示す。
血液の表面張力を下げることにより、吸収した血液をトップシートの繊維間に保持せず、速やかに吸収体に移行させることができると考えられる。
2,2A トップシート
3,3A バックシート
4,4A 吸収体
5,5A 拡散シート
6,6A カバーシート
7 サイドシート
8 粘着部
11 本体部
12 ウイング部
13A 圧搾部
14A 中高部
15A 周囲部
16A クッション部
17A 弾性部材
141A 中高部の中央部
142A 中高部の外周部
Claims (14)
- 肌側に設けられた液透過性のトップシートと、
着衣側に設けられた液不透過性のバックシートと、
該トップシートおよび該バックシートの間に設けられた液保持性の吸収体と、
前記トップシートおよび前記吸収体の間に設けられ、かつ前記吸収体が設けられている領域内に設けられた第1のシートと、
前記第1のシートおよび前記吸収体の間に設けられた第2のシートとを含み、
前記第1のシートは、液透過性を有するとともに液保持性を有し、
前記第2のシートは、液透過性を有するが液保持性を有さず、前記吸収体に吸収された経血の赤色を隠ぺいする、吸収性物品。 - 前記第1のシートが設けられている領域は、排泄口当接域を含む、請求項1に記載の吸収性物品。
- 前記第1のシートは、50重量%以上のセルロース系繊維を含む、請求項1または2に記載の吸収性物品。
- 前記第2のシートは、50重量%以上の熱可塑性化学繊維を含む、請求項1~3のいずれか1項に記載の吸収性物品。
- 前記吸収体の面積に対する前記第1のシートの面積の割合は、10~90%である、請求項1~4のいずれか1項に記載の吸収性物品。
- 前記第2のシートが設けられている領域は、前記第1のシートが設けられている領域を含み、
前記第1のシートの面積に対する前記第2のシートの面積の割合は、110%以上であり、前記吸収体の面積に対する前記第2のシートの面積の割合は、150%以下である、請求項1~5のいずれか1項に記載の吸収性物品。 - 厚さ方向に突出する中高部を有し、
前記中高部において、前記第1のシートおよび前記第2のシートとの間にクッション部を含み、
前記クッション部は、3~30mmの最大厚みを有し、
前記クッション部は、複数の繊維を含み、
前記複数の繊維の交点が熱融着されている、請求項1~6のいずれか1項に記載の吸収性物品。 - 前記中高部は、40℃における0.01~80mm2/sの動粘度と、0.01~4.0質量%の抱水率と、1,000未満の重量平均分子量とを有する血液滑性付与剤を含む、請求項7に記載の吸収性物品。
- 前記血液滑性付与剤が、0.00~0.60のIOBをさらに有する、請求項8に記載の吸収性物品。
- 前記血液滑性付与剤が、次の(i)~(iii)、
(i)炭化水素、
(ii) (ii-1)炭化水素部分と、(ii-2)前記炭化水素部分のC-C単結合間に挿入された、カルボニル基(-CO-)及びオキシ基(-O-)から成る群から選択される、一又は複数の、同一又は異なる基とを有する化合物、及び
(iii) (iii-1)炭化水素部分と、(iii-2)前記炭化水素部分のC-C単結合間に挿入された、カルボニル基(-CO-)及びオキシ基(-O-)から成る群から選択される、一又は複数の、同一又は異なる基と、(iii-3)前記炭化水素部分の水素原子を置換する、カルボキシル基(-COOH)及びヒドロキシル基(-OH)から成る群から選択される、一又は複数の、同一又は異なる基とを有する化合物、
並びにそれらの任意の組み合わせから成る群から選択され、
ここで、(ii)又は(iii)の化合物において、オキシ基が2つ以上挿入されている場合には、各オキシ基は隣接していない請求項8または9に記載の吸収性物品。 - 前記血液滑性付与剤が、次の(i’)~(iii’)、
(i’)炭化水素、
(ii’) (ii’-1)炭化水素部分と、(ii’-2)前記炭化水素部分のC-C単結合間に挿入された、カルボニル結合(-CO-)、エステル結合(-COO-)、カーボネート結合(-OCOO-)、及びエーテル結合(-O-)から成る群から選択される、一又は複数の、同一又は異なる結合とを有する化合物、及び
(iii’) (iii’-1)炭化水素部分と、(iii’-2)前記炭化水素部分のC-C単結合間に挿入された、カルボニル結合(-CO-)、エステル結合(-COO-)、カーボネート結合(-OCOO-)、及びエーテル結合(-O-)から成る群から選択される、一又は複数の、同一又は異なる結合と、(iii’-3)前記炭化水素部分の水素原子を置換する、カルボキシル基(-COOH)及びヒドロキシル基(-OH)から成る群から選択される、一又は複数の、同一又は異なる基とを有する化合物、
並びにそれらの任意の組み合わせから成る群から選択され、
ここで、(ii’)又は(iii’)の化合物において、2以上の同一又は異なる結合が挿入されている場合には、各結合は隣接していない、請求項8~10のいずれか1項に記載の吸収性物品。 - 前記血液滑性付与剤が、次の(A)~(F)、
(A) (A1)鎖状炭化水素部分と、前記鎖状炭化水素部分の水素原子を置換する2~4個のヒドロキシル基とを有する化合物と、(A2)鎖状炭化水素部分と、前記鎖状炭化水素部分の水素原子を置換する1個のカルボキシル基とを有する化合物とのエステル、
(B) (B1)鎖状炭化水素部分と、前記鎖状炭化水素部分の水素原子を置換する2~4個のヒドロキシル基とを有する化合物と、(B2)鎖状炭化水素部分と、前記鎖状炭化水素部分の水素原子を置換する1個のヒドロキシル基とを有する化合物とのエーテル、
(C) (C1)鎖状炭化水素部分と、前記鎖状炭化水素部分の水素原子を置換する、2~4個のカルボキシル基とを含むカルボン酸、ヒドロキシ酸、アルコキシ酸又はオキソ酸と、(C2)鎖状炭化水素部分と、前記鎖状炭化水素部分の水素原子を置換する1個のヒドロキシル基とを有する化合物とのエステル、
(D)鎖状炭化水素部分と、前記鎖状炭化水素部分のC-C単結合間に挿入された、エーテル結合(-O-)、カルボニル結合(-CO-)、エステル結合(-COO-)、及びカーボネート結合(-OCOO-)から成る群から選択されるいずれか1つの結合とを有する化合物、
(E)ポリオキシC3~C6アルキレングリコール、又はそのアルキルエステル若しくはアルキルエーテル、及び
(F)鎖状炭化水素、
並びにそれらの任意の組み合わせから成る群から選択される、請求項8~11のいずれか1項に記載の吸収性物品。 - 前記血液滑性付与剤が、(a1)鎖状炭化水素テトラオールと少なくとも1の脂肪酸とのエステル、(a2)鎖状炭化水素トリオールと少なくとも1の脂肪酸とのエステル、(a3)鎖状炭化水素ジオールと少なくとも1の脂肪酸とのエステル、(b1)鎖状炭化水素テトラオールと少なくとも1の脂肪族1価アルコールとのエーテル、(b2)鎖状炭化水素トリオールと少なくとも1の脂肪族1価アルコールとのエーテル、(b3)鎖状炭化水素ジオールと少なくとも1の脂肪族1価アルコールとのエーテル、(c1)4個のカルボキシル基を有する鎖状炭化水素テトラカルボン酸、ヒドロキシ酸、アルコキシ酸又はオキソ酸と、少なくとも1の脂肪族1価アルコールとのエステル、(c2)3個のカルボキシル基を有する鎖状炭化水素トリカルボン酸、ヒドロキシ酸、アルコキシ酸又はオキソ酸と、少なくとも1の脂肪族1価アルコールとのエステル、(c3)2個のカルボキシル基を有する鎖状炭化水素ジカルボン酸、ヒドロキシ酸、アルコキシ酸又はオキソ酸と、少なくとも1の脂肪族1価アルコールとのエステル、(d1)脂肪族1価アルコールと脂肪族1価アルコールとのエーテル、(d2)ジアルキルケトン、(d3)脂肪酸と脂肪族1価アルコールとのエステル、(d4)ジアルキルカーボネート、(e1)ポリオキシC3~C6アルキレングリコール、(e2)ポリオキシC3~C6アルキレングリコールと少なくとも1の脂肪酸とのエステル、(e3)ポリオキシC3~C6アルキレングリコールと少なくとも1の脂肪族1価アルコールとのエーテル、及び(f1)鎖状アルカン、並びにそれらの任意の組み合わせから成る群から選択される、請求項8~12のいずれか1項に記載の吸収性物品。
- 前記血液滑性付与剤が、1気圧及び40℃において、0.00~0.01Paの蒸気圧を有する、請求項8~13のいずれか1項に記載の吸収性物品。
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JP6021567B2 (ja) * | 2012-09-30 | 2016-11-09 | ユニ・チャーム株式会社 | 吸収性物品 |
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-
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- 2012-09-28 JP JP2012218871A patent/JP5745487B2/ja not_active Expired - Fee Related
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2013
- 2013-09-12 AU AU2013321397A patent/AU2013321397A1/en not_active Abandoned
- 2013-09-12 EP EP13840239.1A patent/EP2901973B1/en not_active Not-in-force
- 2013-09-12 CN CN201380050912.3A patent/CN104684519B/zh not_active Expired - Fee Related
- 2013-09-12 WO PCT/JP2013/074720 patent/WO2014050595A1/ja active Application Filing
- 2013-09-12 IN IN1810DEN2015 patent/IN2015DN01810A/en unknown
- 2013-09-12 US US14/430,721 patent/US20150328359A1/en not_active Abandoned
- 2013-09-12 SG SG11201501718PA patent/SG11201501718PA/en unknown
- 2013-09-12 KR KR1020147032256A patent/KR101953428B1/ko active IP Right Grant
- 2013-09-27 TW TW102135078A patent/TWI605800B/zh not_active IP Right Cessation
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CN106488757A (zh) * | 2014-06-27 | 2017-03-08 | 尤妮佳股份有限公司 | 吸收性物品 |
US11154431B1 (en) | 2020-11-06 | 2021-10-26 | Mast Industries (Far East) Limited | Absorbent garment and method of manufacture thereof |
US11957552B2 (en) | 2020-11-06 | 2024-04-16 | Mast Industries (Far East) Limited | Absorbent garment and method of manufacture thereof |
Also Published As
Publication number | Publication date |
---|---|
EP2901973B1 (en) | 2018-04-18 |
JP2014068945A (ja) | 2014-04-21 |
US20150328359A1 (en) | 2015-11-19 |
CN104684519A (zh) | 2015-06-03 |
EP2901973A1 (en) | 2015-08-05 |
CN104684519B (zh) | 2017-04-12 |
EP2901973A4 (en) | 2016-06-08 |
AU2013321397A1 (en) | 2015-03-26 |
KR101953428B1 (ko) | 2019-02-28 |
SG11201501718PA (en) | 2015-04-29 |
TWI605800B (zh) | 2017-11-21 |
JP5745487B2 (ja) | 2015-07-08 |
IN2015DN01810A (ja) | 2015-05-29 |
TW201424703A (zh) | 2014-07-01 |
KR20150063960A (ko) | 2015-06-10 |
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