a. Bangkok Factory
Bangkok Factory was established in December 1963 and production began in January 1967. In produce compound chip for automobile and electric use. The factory is located near Don Muang
b. Ayutthaya Factory
Ayutthaya factory was established in April 1991 and production began in October 1992. In September 2004, the factory started a new business to produce N66 yarn for airbag. The factory is located in Hi-Tech Industrial Estate in Ayutthaya province, on the bank of Chao Phraya river, about 70 km north of Bangkok.
c. Nakhon Factory
Nakhon Pathom factory was established in January 1988 and production began in July 1988.The factory is located in Nakhon Pathom province, about 45 km west of Bangkok.