Patent ID: 8397378

Claim:
A method of manufacturing an insulating sheet, the method comprising: forming a thermoplastic reinforcement material, the thermoplastic reinforcement material comprising fibers secured by a thermoplastic polymer binder and having pores formed therein; forming a thermoplastic resin layer such that the thermoplastic reinforcement material is impregnated with a thermoplastic resin; and hot pressing the thermoplastic reinforcement material and the thermoplastic resin layer, wherein the hot pressing is performed at a temperature higher than a fusion point of the thermoplastic resin layer by 10 to 50° C. and lower than a fusion point of the thermoplastic reinforcement material by 10° C., and wherein the thermoplastic reinforcement material is formed using blow molding processing, by adding the fibers and the thermoplastic polymer binder through the respective extruders of a co-extruder to fuse separate resins and having the thermoplastic polymer binder secure the fibers.