Union Plastic Public Company Limited, a part of the Saha-Union Group of companies, one of Thailand's leading commercial concerns, was established under the name of Union Plastic Limited (UP) in 1969 with registered capital of Bt 125 million. In 1977, UP listed on the Stock Exchange of Thailand (SET) and was renamed “Union Plastic Public Company Limited”.

With a current registered capital of Bt 250 million, UP employs over 800 staff, and utilizes modern machinery and equipment in its thermoplastic injection manufacturing. UP's modern production technology with expert and qualified staff enable the company to manufacture products according to exact customer requirement.