초록 ▼

The present invention addresses the problem of providing an absorbent article that is provided with a liquid-permeable layer, said liquid-permeable layer having convex portions that are hollow inside, has an improved ability to transfer menstrual blood from the liquid-permeable layer to an absorbent

The present invention addresses the problem of providing an absorbent article that is provided with a liquid-permeable layer, said liquid-permeable layer having convex portions that are hollow inside, has an improved ability to transfer menstrual blood from the liquid-permeable layer to an absorbent body and can reduce the amount of the menstrual blood remaining in the liquid-permeable layer (in particular, the internal cavities in the convex portions). To solve this problem, provided is a sanitary napkin provided with a liquid-permeable top sheet, a liquid-impermeable back sheet and an absorbent body that is interposed between the top sheet and the back sheet, wherein convex portions, said convex portions being hollow inside and formed in an excretion orifice contact region of the top sheet, are coated with a blood lubricity-imparting agent that has a kinetic viscosity of 0.01-80 mm2/s at 40° C., a water retention rate of 0.01-4.0 mass % and a weight-average molecular weight of less than 1,000.

대표청구항 ▼

1. An absorbent article comprising a liquid-permeable layer with a skin contact surface, a liquid-impermeable layer with a non-skin-contacting surface, and an absorbent body situated between the liquid-permeable layer and the liquid-impermeable layer, wherein the liquid-permeable layer has a first l

1. An absorbent article comprising a liquid-permeable layer with a skin contact surface, a liquid-impermeable layer with a non-skin-contacting surface, and an absorbent body situated between the liquid-permeable layer and the liquid-impermeable layer, wherein the liquid-permeable layer has a first layer formed on the skin contact surface and a second layer formed on the non-skin contact surface side,the first layer has a projection with a hollow interior bulging out on the skin contact surface side, which is formed at least in the excretory opening contact region on the skin contact surface side, and is partially bonded with the second layer at sections other than the projection, andat least the projection of the excretory opening contact region is coated with a coating consisting essentially of a blood slipping agent having a 40° C. kinematic viscosity of 0.01 to 80 mm2/s, a water holding percentage of 0.01 to 4.0 mass % and a weight-average molecular weight greater than 0 and less than 1,000, wherein the coating is present at a basis weight ranging from about 1 g/m2 to about 30 g/m2, and the coating is configured to migrate from the skin contact surface through the liquid-permeable layer into the absorbent body with menstrual blood. 2. An absorbent article according to claim 1, wherein fiber density across all portions of the projection is essentially constant. 3. An absorbent article according to claim 1, wherein basis weight across all portions of the projection is essentially constant. 4. An absorbent article according to claim 1, wherein the Inorganic Organic Balance (JOB) of the blood slipping agent is 0.00 to 0.60. 5. An absorbent article according to claim 1, wherein the blood slipping agent is selected from the group consisting of the following items (i)-(iii), and any combination thereof: (i) a hydrocarbon;(ii) a compound having (ii-1) a hydrocarbon moiety, and (ii-2) one or more, same or different groups selected from the group consisting of carbonyl group (—CO—) and oxy group (—O—) inserted between a C—C single bond of the hydrocarbon moiety; and(iii) a compound having (iii-1) a hydrocarbon moiety, (iii-2) one or more, same or different groups selected from the group consisting of carbonyl group (—CO—) and oxy group (—O—) inserted between a C—C single bond of the hydrocarbon moiety, and (iii-3) one or more, same or different groups selected from the group consisting of carboxyl group (—COOH) and hydroxyl group (—OH) substituting a hydrogen of the hydrocarbon moiety;with the proviso that when 2 or more oxy groups are inserted in the compound of (ii) or (iii), the oxy groups are not adjacent. 6. An absorbent article according to claim 1, wherein the blood slipping agent is selected from the group consisting of the following items (i′)-(iii′), and any combination thereof: (i′) a hydrocarbon;(ii′) a compound having (ii′-1) a hydrocarbon moiety, and (ii′-2) one or more, same or different bonds selected from the group consisting of carbonyl bond (—CO—), ester bond (—COO—), carbonate bond (—OCOO—), and ether bond (—O—) inserted between a C—C single bond of the hydrocarbon moiety; and(iii′) a compound having (iii′-1) a hydrocarbon moiety, (iii′-2) one or more, same or different bonds selected from the group consisting of carbonyl bond (—CO—), ester bond (—COO—), carbonate bond (—OCOO—), and ether bond (—O—) inserted between a C—C single bond of the hydrocarbon moiety, and (iii′-3) one or more, same or different groups selected from the group consisting of carboxyl group (—COOH) and hydroxyl group (—OH) substituting a hydrogen on the hydrocarbon moiety;with the proviso that when 2 or more same or different bonds are inserted in the compound of (ii′) or (iii′), the bonds are not adjacent. 7. An absorbent article according to claim 1, wherein the blood slipping agent is selected from the group consisting of the following items (A)-(F), and any combination thereof: (A) an ester of (A1) a compound having a chain hydrocarbon moiety and 2-4 hydroxyl groups substituting hydrogens on the chain hydrocarbon moiety, and (A2) a compound having a chain hydrocarbon moiety and 1 carboxyl group substituting a hydrogen on the chain hydrocarbon moiety;(B) an ether of (B1) a compound having a chain hydrocarbon moiety and 2-4 hydroxyl groups substituting hydrogens on the chain hydrocarbon moiety and (B2) a compound having a chain hydrocarbon moiety and 1 hydroxyl group substituting a hydrogen on the chain hydrocarbon moiety;(C) an ester of (C1) a carboxylic acid, hydroxy acid, alkoxy acid or oxoacid comprising a chain hydrocarbon moiety and 2-4 carboxyl groups substituting hydrogens on the chain hydrocarbon moiety and (C2) a compound having a chain hydrocarbon moiety and 1 hydroxyl group substituting a hydrogen on the chain hydrocarbon moiety;(D) a compound having a chain hydrocarbon moiety and one bond selected from the group consisting of an ether bond (—O—), carbonyl bond (—CO—), ester bond (—COO—) and carbonate bond (—OCOO—) inserted between a C—C single bond of the chain hydrocarbon moiety;(E) a polyoxy C3-C6 alkylene glycol, or alkyl ester or alkyl ether thereof; and(F) a chain hydrocarbon. 8. An absorbent article according to claim 1, wherein the blood slipping agent is selected from the group consisting of (a1) an ester of a chain hydrocarbon tetraol and at least one fatty acid, (a2) an ester of a chain hydrocarbon triol and at least one fatty acid, (a3) an ester of a chain hydrocarbon diol and at least one fatty acid, (b1) an ether of a chain hydrocarbon tetraol and at least one aliphatic monohydric alcohol, (b2) an ether of a chain hydrocarbon triol and at least one aliphatic monohydric alcohol, (b3) an ether of a chain hydrocarbon diol and at least one aliphatic monohydric alcohol, (c1) an ester of a chain hydrocarbon tetracarboxylic acid, hydroxy acid, alkoxy acid or oxoacid with 4 carboxyl groups, and at least one aliphatic monohydric alcohol, (c2) an ester of a chain hydrocarbon tricarboxylic acid, hydroxy acid, alkoxy acid or oxoacid with 3 carboxyl groups, and at least one aliphatic monohydric alcohol, (c3) an ester of a chain hydrocarbon dicarboxylic acid, hydroxy acid, alkoxy acid or oxoacid with 2 carboxyl groups, and at least one aliphatic monohydric alcohol, (d1) an ether of an aliphatic monohydric alcohol and an aliphatic monohydric alcohol, (d2) a dialkyl ketone, (d3) an ester of a fatty acid and an aliphatic monohydric alcohol, (d4) a dialkyl carbonate, (e1) a polyoxy C3-C6 alkylene glycol, (e2) an ester of a polyoxy C3-C6 alkylene glycol and at least one fatty acid, (e3) an ether of a polyoxy C3-C6 alkylene glycol and at least one aliphatic monohydric alcohol, and (f1) a chain alkane, and any combination thereof. 9. The absorbent article according to claim 1, wherein the blood slipping agent has a vapor pressure of 0.00 to 0.01 Pa at 1 atmosphere, 40° C.