Patent ID: 8747986
Filing Date: 2014-06-10
Classification: B32B,Y10T

Abstract:
1. A gas-barrier heat-seal composite film, comprising: a heat-seal layer comprising very low density polyethylene (VLDPE), low density polyethylene (LDPE), linear low density polyethylene (LLDPE), high density polyethylene (HDPE), metallocene polyethylene (mPE), metallocene linear low density polyethylene (mLLDPE), ethylene-propylene (EP) copolymer or ethylene-propylene-butene (EPB) terpolymer; and a gas-barrier layer comprising a plurality of composite layers formed on one side of the heat-seal layer, each of the composite layers comprising multiple layers of metal or oxide thereof formed on one side or both sides of a polymer substrate, and at least one primer layer formed between the polymer substrate and one of the layers of metal or oxide thereof or between the layers of metal or oxide thereof, wherein the polymer substrate comprises uniaxial-stretched or biaxial-stretched polyethylene terephthalate (PET), polybutylene terephthalate (PBT), polyimide (PI), ethylene/vinyl alcohol (EVOH) copolymer or a combination thereof; and wherein the primer layer comprises urethane acrylate, epoxy acrylate, silicone acrylate or a mixture thereof.