Company Introduction China Tianjin Heng Tong Era Electrical Material Technology Co., Ltd., founded in 1991, is an enterprise specialized in producing insulation materials for electrical use. The company is located in Tianjin municipality. It is only half an hour to Tianjin Xingang harbor by driving, and only half an hour to Beijing by train. Our main products embrace polyimide film series, adhesive tape series and composite material series. Polyimide film series include Corona-resistant ...