Since opening our doors in 1991, Siwin Corporation has become one of the most solidified
plastic companies in the industry. As a family owned business, Polywin's philosophy is embedded in trust.
Over the years, the company has sustained good long-term buyer and supplier relationships.
Siwin Corp. also believes in a "customer-oriented" plan. The past success of the company is reflected
in each customer. With the experience of Polywin's staff, and its stability in the industry, opportunities
will arise so that we can assist anyone who is interested in the realm of plastics.