Shopping bag made of nonwoven fabric

Abstract

A shopping bag made of nonwoven fabric according to an aspect of the present invention includes: a lower part which has a bottom that is capable of closing and stretching linearly, right and left sides that are folded inward with a gusset, and an upper part forming a pair of folded broad handles. At least a surface of the shopping bag is made of polyolefin nonwoven fabric A surface of the nonwoven fabric has a print ink layer. A polymer region with high solubility to hot water is interposed between the print ink layer and the nonwoven fabric. A recycle method of a shopping bag made of nonwoven fabric according to another aspect of the present invention includes: retrieving the above-described shopping bag made of nonwoven fabric that has been used; removing the print ink layer from the nonwoven fabric of the shopping bag made of nonwoven fabric by retting the retrieved shopping bag made of nonwoven fabric in warm water or alkali water to dissolve the polymer region into the warm water or alkali water; and reproducing a shopping bag made of nonwoven fabric by using the used shopping bag made of nonwoven fabric from which the print ink layer has been removed as raw material.

1 . A shopping bag made of nonwoven fabric comprising:
 a lower part which has a bottom that is capable of closing and stretching linearly;   right and left sides that are folded inward with a gusset; and   an upper part forming a pair of folded broad handles; wherein   at least a surface of the shopping bag is made of polyolefin nonwoven fabric,   a surface of the nonwoven fabric has a print ink layer, and   a polymer region with high solubility to hot water is interposed between the print ink layer and the nonwoven fabric.   
     
     
         2 . The shopping bag made of nonwoven fabric according to  claim 1 , wherein the polymer region is composed of polymers whose solubility is less than 20 g per 100-g water at 20° C. and 60 g or more per 100-g water at 60° C. 
     
     
         3 . The shopping bag made of nonwoven fabric according to  claim 1 , wherein the polymer region contains modified polyvinyl alcohol with a cross-linked structure. 
     
     
         4 . The shopping bag made of nonwoven fabric according to  claim 3 , wherein the modified polyvinyl alcohol is composed of polymers whose solubility is less than 20 g per 100-g water at 20° C. and 60 g or more per 100-g water at 60° C. 
     
     
         5 . The shopping bag made of nonwoven fabric according to  claim 1 , wherein the polymer region is formed by a layer of the polymers formed on the surface of the polyolefin nonwoven fabric. 
     
     
         6 . The shopping bag made of nonwoven fabric according to  claim 1 , wherein the polymer region is formed by the polymers being impregnated into the polyolefin nonwoven fabric. 
     
     
         7 . A recycle method of a shopping bag made of nonwoven fabric, the recycle method comprising:
 retrieving the shopping bag made of nonwoven fabric according to  claim 1 , the shopping bag having been used;   removing the print ink layer from the surface made of nonwoven fabric of the shopping bag made of nonwoven fabric by retting the retrieved shopping bag made of nonwoven fabric in warm water or alkali water to dissolve the polymer region into the warm water or alkali water; and   reproducing a shopping bag made of nonwoven fabric using the used shopping bag made of nonwoven fabric from which the print ink layer has been removed as raw material.   
     
     
         8 . The recycle method of a shopping bag of nonwoven fabric according to  claim 7 , wherein the shopping bag made of nonwoven fabric is vibrated while being retted in warm water or alkali water. 
     
     
         9 . A shopping bag made of nonwoven fabric comprising:
 a lower part which has a bottom that is capable of closing and stretching linearly;   right and left sides that are folded inward with a gusset; and   an upper part forming a pair of folded broad handles; wherein   at least a surface of the shopping bag is made of polyolefin nonwoven fabric, and   the whole or some part at least including the handles of the upper part is made of single-layer thick nonwoven fabric with 1.1 times or more thickness compared with the other parts of the shopping bag.   
     
     
         10 . The shopping bag made of nonwoven fabric according to  claim 9 , wherein the whole or some part at least including the handles of the upper part has 1.8 and 3.0 times thickness compared with the other parts of the shopping bag. 
     
     
         11 . The shopping bag made of nonwoven fabric according to  claim 9 , wherein the length of a part made of the thick nonwoven fabric along the longitudinal direction of the shopping bag made of nonwoven fabric is one-fifth to one-third of the whole length of the shopping bag. 
     
     
         12 . A shopping bag made of nonwoven fabric comprising:
 a lower part which has a bottom that is capable of closing and stretching linearly;   right and left sides that are folded inward with a gusset; and   an upper part forming a pair of folded broad handles; wherein   at least a surface of the shopping bag is made of polyolefin nonwoven fabric, and   at each of the right and left sides of the bag, two corners are heat-sealed at a tie together point extending in a longitudinal direction, and at the top of the each heat-sealed part, an ear part extending upward from the upper edge of the sides of the bag is formed.   
     
     
         13 . The shopping bag made of nonwoven fabric according to  claim 12 , wherein the upper edge of the ear part is shaped like a bent convex curve, and a part from the side edge of the ear part to the upper edge of each side of the bag is shaped like a bent concave curve. 
     
     
         14 . The shopping bag made of nonwoven fabric according to  claim 1 , wherein the shopping bag is made of polypropylene nonwoven fabric. 
     
     
         15 . The shopping bag made of nonwoven fabric according to  claim 9 , wherein the shopping bag is made of polypropylene nonwoven fabric. 
     
     
         16 . The shopping bag made of nonwoven fabric according to  claim 12 , wherein the shopping bag is made of polypropylene nonwoven fabric. 
     
     
         17 . The shopping bag made of nonwoven fabric according to  claim 14 , wherein the shopping bag is sewn with polypropylene continuous filament. 
     
     
         18 . The shopping bag made of nonwoven fabric according to  claim 15 , wherein the shopping bag is sewn with polypropylene continuous filament. 
     
     
         19 . The shopping bag made of nonwoven fabric according to  claim 16 , wherein the shopping bag is sewn with polypropylene continuous filament.