Readily removable film, label for in-mold molding, molded resin article having label attached thereto, wallpaper, glue label, and container having label attached thereto

Abstract

A readily removable film containing a substrate layer (A) and a readily removable layer (B), wherein the substrate layer (A) contains a thermoplastic resin, the readily removable layer (B) contains from 30 to 60% by weight of a mixture of a crystalline polypropylene resin having a degree of crystallinity of at least 65% and a thermoplastic resin immiscible with the crystalline polypropylene resin, and from 40 to 70% by weight of a fine powder, in which the thermoplastic resin immiscible with the crystalline polypropylene resin is blended in a ratio of from 105 to 300 parts by weight relative to 100 parts by weight of the crystalline polypropylene resin, and the readily removable layer (B) is stretched at least monoaxially.

1 . A readily removable film containing a substrate layer (A) and a readily removable layer (B), wherein:
 the substrate layer (A) contains a thermoplastic resin;   the readily removable layer (B) contains from 30 to 60% by weight of a mixture that contains 105 to 300 parts by weight of a polyethylene resin relative to 100 parts by weight of a crystalline polypropylene resin having a degree of crystallinity of at least 65%   and from 40 to 70% by weight of a fine powder; and   the readily removable layer (B) is stretched at least monoaxially.   
     
     
         2 . The readily removable film according to  claim 1 , wherein the fine powder contains an inorganic fine powder of particles hydrophilized with a surface-treating agent on the surface thereof. 
     
     
         3 . The readily removable film according to  claim 2 , wherein the surface-treating agent is at least one surfactant selected from a group consisting of a water-soluble anionic surfactant, a water-soluble cationic surfactant, and a water-soluble nonionic surfactant. 
     
     
         4 . The readily removable film according to  claim 2 , wherein the fine powder contains from 50 to 99.9% by weight of an inorganic fine powder of particles hydrophilized on the surface thereof and from 0.1 to 50% by weight of at least one of an inorganic fine powder of particles not hydrophilized on the surface thereof and an organic fine powder. 
     
     
         5 . The readily removable film according to  claim 2 , wherein the liquid absorption capacity of the readily removable layer (B), as measured according to “Japan TAPPI No. 51-2000”, is from 1 to 20 ml/m 2 . 
     
     
         6 . The readily removable film according to  claim 1 , wherein the readily removable layer (B) further contains a dispersant for the fine powder in an amount of from 0.5 to 30 parts by weight relative to 100 parts by weight of the fine powder. 
     
     
         7 . The readily removable film according to  claim 6 , wherein the dispersant is at least one of a maleic acid-modified polyolefin and a silanol-modified polypropylene. 
     
     
         8 . The readily removable film according to  claim 1 , wherein the thickness of the readily removable layer (B) is from 0.1 to 20 μm. 
     
     
         9 . The readily removable film according to  claim 1 , wherein the aperture ratio of the surface of the readily removable layer (B) is from 7 to 60%. 
     
     
         10 . The readily removable film according to  claim 1 , wherein the arithmetic mean roughness of the surface of the readily removable layer (B) is from 0.3 to 1.8 μm. 
     
     
         11 . The readily removable film according to  claim 1 , wherein the substrate layer (A) has a multilayer structure. 
     
     
         12 . The readily removable film according to  claim 1 , which is printed on the surface of the readily removable layer (B). 
     
     
         13 . The readily removable film according  claim 1 , further having a masking layer (C). 
     
     
         14 . The readily removable film according to  claim 13 , wherein the masking layer (C) is formed according to at least one method selected from the group consisting of black printing or gray printing on the surface thereof on the side of the readily removable layer (B), or adding a masking pigment to the substrate layer (A), or insertion of black printing between the substrate layer (A). 
     
     
         15 . The readily removable film according to  claim 1 , further having a coat layer (D) on the surface thereof on the side of the substrate layer (A). 
     
     
         16 . A glue label comprising a water-based adhesive layer arranged on the surface on the side of the readily removable layer (B) of the readily removable film of  claim 1 . 
     
     
         17 . A labeled container, having the glue label of  claim 16  attached thereto.