Absorbent article including hydrophobized adsorbent

Abstract

An objective of the present invention is to provide an absorbent article that prevents wetting of the outer sides or surrounding area of the absorbent article due to condensation formed by water vapor escaped from inside the absorbent article. The present invention provides an absorbent article comprising: an absorbent body composed of at least one absorption layer, wherein the absorbent body includes a hydrophobized adsorbent and (a) a water absorbent resin powder having an absorption speed in a range from 6 seconds to 60 seconds determined by a vortex method.

What is claimed is: 
     
         1 . An absorbent article comprising an absorbent body composed of at least one absorption layer,
 wherein the absorbent body includes a hydrophobized adsorbent physically adsorbing water vapor, and a water absorbent resin powder having (a) an absorption speed in a range of from 6 seconds to 60 seconds determined by a vortex method, and   wherein the hydrophobized adsorbent is provided at a location closer to a skin surface side of a wearer than the water absorbent resin powder having (a) the absorption speed in the range of from 6 seconds to 60 seconds determined by the vortex method.   
     
     
         2 . The absorbent article according to  claim 1 , wherein the hydrophobized adsorbent is at least one selected from the group consisting of hydrophobized silica, hydrophobized alumina, hydrophobized zeolite, and hydrophobized activated carbon. 
     
     
         3 . The absorbent article according to  claim 1 , wherein the water absorbent resin powder satisfies the following requirements of (b) to (d):
 (b) Moisture absorption blocking rate: 10% or lower;   (c) Absorption ratio: 30 g/g to 70 g/g; and   (d) Water retention amount: 25 g/g to 65 g/g.   
     
     
         4 . The absorbent article according to  claim 1 , wherein the absorbent body includes the hydrophobized adsorbent in an amount of from 0.01 part by mass to 20 parts by mass with respect to 100 parts by mass of the water absorbent resin powder. 
     
     
         5 . The absorbent article according to  claim 1 , wherein the hydrophobized adsorbent has a specific surface area of 200 m 2 /g or more. 
     
     
         6 . The absorbent article according to  claim 1 , comprising a liquid permeable top sheet, a liquid impermeable back sheet, and the absorbent body interposed between the liquid permeable top sheet and the liquid impermeable back sheet. 
     
     
         7 . The absorbent article according to  claim 1 , wherein the absorbent article is an open-type or pants-type disposable diaper. 
     
     
         8 . The absorbent article according to  claim 1 , wherein the hydrophobized adsorbent is provided at a location closer to the skin surface side of the wearer than a water absorbent material including the water absorbent resin powder having (a) the absorption speed in the range from 6 seconds to 60 seconds determined by the vortex method. 
     
     
         9 . The absorbent article according to  claim 8 , wherein the water absorbent material optionally further includes a fiber base material and/or a water absorbent resin powder having an absorption speed of less than 6 seconds or more than 60 seconds determined by the vortex method. 
     
     
         10 . The absorbent article according to  claim 8 , wherein the absorbent body is composed of one absorption layer, and the hydrophobized adsorbent is provided on an upper surface of a layer formed by the water absorbent material. 
     
     
         11 . The absorbent article according to  claim 10 , wherein the hydrophobized adsorbent is directly attached to the upper surface of the layer formed by the water absorbent material. 
     
     
         12 . The absorbent article according to  claim 10 , wherein an adsorption sheet having the hydrophobized adsorbent supported on a liquid permeable nonwoven fabric sheet is laminated on the upper surface of the layer formed by the water absorbent material. 
     
     
         13 . The absorbent article according to  claim 10 , wherein the hydrophobized adsorbent is uniformly provided on the whole upper surface of the layer formed by the water absorbent material. 
     
     
         14 . The absorbent article according to  claim 10 , wherein the hydrophobized adsorbent is provided on the upper surface of the layer formed by the water absorbent material in multiple streaks extending continuously or intermittently in one direction. 
     
     
         15 . The absorbent article according to  claim 8 , wherein the absorbent body is composed of at least two absorption layers, the uppermost absorption layer includes the water absorbent material and the hydrophobized adsorbent, and the hydrophobized adsorbent is provided on an upper surface of a layer formed by the water absorbent material of the uppermost absorption layer. 
     
     
         16 . The absorbent article according to  claim 15 , wherein the hydrophobized adsorbent is directly attached to the upper surface of the layer formed by the water absorbent material of the uppermost absorption layer. 
     
     
         17 . The absorbent article according to  claim 15 , wherein an adsorption sheet having the hydrophobized adsorbent supported on a liquid permeable nonwoven fabric sheet is laminated on the upper surface of the layer formed by the water absorbent material of the uppermost absorption layer. 
     
     
         18 . The absorbent article according to  claim 15 , wherein the hydrophobized adsorbent is uniformly provided on the whole upper surface of the layer formed by the water absorbent material of the uppermost absorption layer. 
     
     
         19 . The absorbent article according to  claim 15 , wherein the hydrophobized adsorbent is provided on the upper surface of the layer formed by the water absorbent material of the uppermost absorption layer in multiple streaks extending continuously or intermittently in one direction.