Patent ID: 8048533
Filing Date: 2011-11-01
Classification: B32B,Y10T

Abstract:
1. A paper seal comprising a stretched thermoplastic resin film that comprises (a) a surface layer, (b) a substrate layer, and (c) a water-based adhesive-receiving layer having a water absorption level of from 2 to 25 ml/m 2 , wherein the stretched thermoplastic resin film has a porosity of from 20 to 50% and a 120°-opening time by bending repulsion of from 20 to 70 seconds, wherein the surface layer (a) comprises from 20 to 100% by weight of a thermoplastic resin (A), the substrate layer (b) comprises from 20 to 80% by weight of a thermoplastic resin (A) and from 80 to 20% by weight of at least one of an inorganic fine powder (B) and an organic filler (B′), and the water-based adhesive-receiving layer (c) comprises from 25 to 50% by weight of a thermoplastic resin (A) and from 75 to 50% by weight of an inorganic fine powder (B), wherein the inorganic fine powder (B) in the water-based adhesive-receiving layer (c) is hydrophilicated with a surface-treating agent (C), and wherein the thermoplastic resin (A) has a degree of crystallinity of from 35% to 75%.