Individual package of absorbent article, wrapping sheet, and method of manufacturing wrapping sheet

Abstract

Disclosed is a wrapping sheet for an absorbent article including an absorbent exhibiting at least a fluid-retaining property, the wrapping sheet includes: a first fiber layer formed by application of a high-pressure water jetting treatment, the first fiber layer including pulp fiber and chemical fiber, the pulp fiber content of the first fiber layer being 30% by mass to 70% by mass, the chemical fiber content of the first fiber layer being 70% by mass to 30% by mass, and the average fiber length of the chemical fiber being 20 mm or less; and a second fiber layer arranged by laminating the second fiber layer to the first fiber layer, the pulp fiber content of the second fiber layer being 70% by mass to 100% by mass.

1 . A wrapping sheet for an absorbent article including at least an absorbent exhibiting a fluid retention property comprising:
 a first fiber layer formed by application of a high-pressure water jetting treatment, the first fiber layer including pulp fiber and chemical fiber, a pulp fiber content of the first layer being 30% by mass to 70% by mass, a chemical fiber content of the first layer being 70% by mass to 30% by mass, an average fiber length of the chemical fiber being not more than 20 mm; and   a second fiber layer arranged by laminating the second fiber layer to the first fiber layer, the second fiber layer including pulp fiber, a pulp fiber content of the second fiber layer being 70% by mass to 100% by mass.   
     
     
         2 . The wrapping sheet according to  claim 1 , wherein
 the second fiber layer includes chemical fiber not more than 30% by mass with an average fiber length of 20 mm or less and with a fiber diameter smaller than that of the pulp fiber.   
     
     
         3 . The wrapping sheet according to  claim 1 , further comprising
 a third fiber layer formed by application of high-pressure water jetting treatment and arranged by laminating the third fiber layer to one side of the second fiber layer with the first fiber layer laminated to the other side of the second fiber layer, the third fiber layer including pulp fiber and chemical fiber, a pulp fiber content of the third fiber layer being 30% by mass to 70% by mass, a chemical fiber content of the third fiber layer being 70% by mass to 30% by mass, an average fiber length of the chemical fiber being not more than 20 mm.   
     
     
         4 . The wrapping sheet according to  claim 1 , wherein
 when a 10 cm×10 cm sample piece of the wrapping sheet placed in 800 cc of distilled water is shaken at a shaking speed of 240 rpm for 30 minutes, the sample piece is so dispersed in the distilled water that a largest remaining piece of wrapping sheet being not more than 50 cm 2  in size.   
     
     
         5 . The wrapping sheet according to  claim 1 , wherein
 a basis weight of the first fiber layer is 10 g/m 2  to 30 g/m 2 ,   a basis weight of the second fiber layer is 15 g/m 2  to 30 g/m 2 , and   a basis weight of the wrapping sheet is 25 g/m 2  to 60 g/m 2 .   
     
     
         6 . The wrapping sheet according to  claim 3 , wherein
 a basis weight of the first fiber layer is 10 g/m 2  to 30 g/m 2 ,   a basis weight of the second fiber layer is 15 g/m 2  to 30 g/m 2 ,   a basic weight of the third fiber layer is 10 g/m 2  to 30 g/m 2 , and   a basis weight of the wrapping sheet is 35 g/m 2  to 60 g/m 2 .   
     
     
         7 . The wrapping sheet according to  claim 1 , wherein
 a pattern is formed in at least one of the first fiber layer and the second fiber layer by changing the basis weight of the first fiber layer and/or the second fiber layer.   
     
     
         8 . The wrapping sheet according to  claim 1 , wherein
 at least one of the first fiber layer and the second fiber layer is colored.   
     
     
         9 . The wrapping sheet according to  claim 8 , wherein
 a color in which the first fiber layer is colored is different from a color in which the second fiber layer is colored.   
     
     
         10 . The wrapping sheet according to any one of  claims 1  to  9 , wherein
 at least one of the first fiber layer, the second fiber layer and the third fiber layer includes a sizing agent, and at least partially exhibits a predetermined water resisting property. 
 
     
     
         11 . An individual package of an absorbent article, comprising:
 an absorbent article at least including an absorbent exhibiting a fluid retention property; and   a wrapping material wrapping the absorbent article, the wrapping material constituted of the wrapping sheet according to  claim 1 .   
     
     
         12 . A method of manufacturing a wrapping sheet, comprising the steps of:
 forming a first fiber layer from pulp fiber and chemical fiber into a web in a wet paper-forming method, and subsequently applying a high-pressure water jetting treatment to at least one side of the fiber web to entangle the pulp fiber and the chemical fiber with each other;   forming a second fiber layer from pulp fiber and chemical fiber; and   conveying the first fiber layer, subsequently integrally laminating the first fiber layer and the second fiber layer to each other while the second fiber layer remains wet, and thereafter drying the laminated first and second fiber layers.   
     
     
         13 . The method of manufacturing a wrapping sheet according to  claim 12 , further comprising the steps of:
 forming a third fiber layer from pulp fiber and chemical fiber into a fiber web in a wet paper-forming method, and subsequently applying a high-pressure water jetting treatment to at least one side of the fiber web to entangle the pulp fiber and chemical fiber with each other; and   conveying the first and second fiber layer after integrally laminating the first fiber layer and the second fiber layer to each other with the first and second fiber layers remain wet, subsequently integrally laminating the third fiber layer onto the first and second fiber layers while the third fiber layer remains wet, there after drying the laminated first, second and third fiber layers.   
     
     
         14 . The method of manufacturing a wrapping sheet according to  claim 12 , wherein
 in at least one of the step of forming the first fiber layer and the step of forming the third fiber layer, the fiber web is transferred from a fiber layer forming wire to a patterning wire after the fiber web is formed, and subsequently the high-pressure water jetting treatment is applied to the fiber web thus transferred.   
     
     
         15 . The method of manufacturing a wrapping sheet according to  claim 12 ,
 wherein, for at least one of the first and third fiber layers, the fiber web is formed by a paper-forming method of any one of a tanmo type and a fourdrinier type.   
     
     
         16 . The method of manufacturing a wrapping sheet according to  claim 12 ,
 wherein the high-pressure water jetting treatment is applied to the fiber web place on a fiber forming wire.   
     
     
         17 . The method of manufacturing a wrapping sheet according to  claim 12 ,
 wherein for the second fiber layer, the fiber web is formed by a paper-forming method of any one of a cylinder type and a former type.