Multilayered-stretched resin film

Abstract

Disclosed is a multilayered-stretched resin film characterized in that on the back surface of a printable front layer (A) comprising a thermoplastic resin, an inorganic finepowder, and/or an organic filler is laminated a back layer (B) comprising a surface-treated inorganic finepowder and a thermoplastic resin comprising a hydrophilic thermoplastic resin, and in that the peel strength of back layer (B) is from 10 to 200 g/cm. The multilayered-stretched resin film affords good suitability for printing and embossing, that can be directly adhered to a wall or the like using a water-soluble adhesive without necessitating a backing of natural paper required by conventional wallpapers, and that can be readily peeled off the wall in a manner permitting recycling.

What is claimed is:  
     
         1 . A multilayered-stretched resin film characterized in that on the back surface of a printable front layer (A) comprising a thermoplastic resin, an inorganic finepowder, and/or an organic filler is laminated a back layer (B) comprising a surface-treated inorganic finepowder and a thermoplastic resin comprising a hydrophilic thermoplastic resin, and in that the peel strength of back layer (B) is from 10 to 200 g/cm.  
     
     
         2 . The multilayered-stretched resin film according to  claim 1  wherein the liquid water-absorption volume as measured by Japan TAPPI NO. 51-87 of said back layer (B) is from 6 to 50 mL/m 2 .  
     
     
         3 . The multilayered-stretched resin film according to  claim 1  or  2  wherein said thermoplastic resin is an olefin-based resin, an olefin-based thermoplastic elastomer, or a mixture of an olefin-based resin and an olefin-based thermoplastic elastomer.  
     
     
         4 . The multilayered-stretched resin film according to  claim 3  wherein said mixture of olefin-based resin and olefin-based thermoplastic elastomer comprises from 10 to 300 weight parts of olefin thermoplastic elastomer per 100 weight parts of olefin-based resin.  
     
     
         5 . The multilayered-stretched resin film according to  claim 3  or  4  wherein the melting point of said olefin-based thermoplastic elastomer is greater than or equal to 160° C.  
     
     
         6 . The multilayered-stretched resin film according to  claim 1  wherein said back layer (B) comprises from 3 to 200 weight parts of said hydrophilic thermoplastic resin per 100 weight parts of nonhydrophilic thermoplastic resin.  
     
     
         7 . The multilayered-stretched resin film according to any one of  claims 1  to  6  wherein said hydrophilic thermoplastic resin is an alkylene oxide polymer.  
     
     
         8 . The multilayered-stretched resin film according to any one of  claims 1  to  7  wherein the surface of the inorganic finepowder employed in back layer (B) is treated with at least one selected from the group consisting of anionic surfactants, cationic surfactants, nonionic surfactants, and antistatic agents.  
     
     
         9 . The multilayered-stretched resin film according to any one of  claims 1  to  8  wherein the porosity of said multilayered-stretched resin film is from 10 to 60 percent.  
     
     
         10 . The multilayered-stretched resin film according to any one of  claims 1  to  9  wherein the porosity of back layer (B) is greater than the porosity of front layer (A).  
     
     
         11 . The multilayered-stretched resin film according to any one of  claims 1  to  10  wherein the average contact angle of water of back layer (B) is from 10 to 80°.  
     
     
         12 . The multilayered-stretched resin film according to any one of  claims 1  to  11  wherein the density of the multilayered-stretched resin film is from 0.4 to 1 g/cm 3 .  
     
     
         13 . The multilayered-stretched resin film according to any one of  claims 1  to  12  which is prepared by laminating front layer (A) and back layer (B) and then stretched the laminate.  
     
     
         14 . The multilayered-stretched resin film according to  claim 13  wherein both front layer (A) and back layer (B) are stretched in at least one axial direction.  
     
     
         15 . The multilayered-stretched resin film according to any one of  claims 1  to  14  wherein front layer (A) and back layer (B) are subjected to oxidation treatment.  
     
     
         16 . The multilayered-stretched resin film according to any one of  claims 1  to  15  wherein front layer (A) is printed and then embossed.  
     
     
         17 . The multilayered-stretched resin film according to any one of  claims 1  to  16  wherein the multilayered-stretched resin film is used for adhesive application and a water-soluble adhesive is coated on back layer (B).  
     
     
         18 . The multilayered-stretched resin film according to  claim 17  wherein said water-soluble adhesive is one selected from the group consisting of starch, polyacrylic acid, polyacrylamide, polyethylene oxide, polyvinyl alcohol, carboxymethyl cellulose, vinyl acetate, and polyvinyl amide.