PURPOSE: To obtain a high performance thermal adhesive film excellent in bonding strength and heat resistance by laminating a thin layer of a blend consisting of an ethylene/ethyl acrylate/maleic anhydride terpolymer and an ethylene/methyl methacrylate copolymer to both surfaces of a base material.
CONSTITUTION: As a polypropylene film being a base material, a film composed of a propylene homopolymer is most proper if heat resistance is considered to be important. As an ethylene/ethyl acrylate/maleic anhydride terpolymer, one consisting of ethylene 68-95 wt.%, ethyl acrylate 1.0-30wt.% and maleic anhydride 0.5-4wt.% is proper. As an ethylene/methyl methacrylate copolymer to be blended, one with copolymerization ratio (wt. ratio) of ethylene and methyl methacrylate of 90:10-85:25 is proper.
TAKAGI YAZO
OMATA YUJI
