| 摘要 |
PURPOSE: An oriented coextrusion film is provided to have excellent adhesion with a substrate without additional processes like lamination coating, not to have the contamination of roll at coextrusion, and to manufacture a film with constant thickness. CONSTITUTION: An oriented coextrusion film comprises a substrate layer, and a surface layer and a thermal adhesive layer respectively contacted to the both sides of the substrate layer. The thermal adhesive layer comprises 50-99 weight% of a first polyolefin resin of which ethylene content is 50-95 weight%, and 1-50 weight% of a second polyolefin resin of which ethylene content is 50-99 weight%, and the crystallization temperatures is lower than the first polyolefin resin. The first substrate layer has a melting index(ASTM D1238, 230°C, 2.16kg) of 1-5 g/10minutes, and comprises propylene homopolymer resin or ethylene-propylene copolymer resin of which ethylene content is 2 weigh% or less. |
