Chengdu Longcheng High Tech Materials Co., Ltd., located in Chengdu, China, is committed to the development and production of food-grade polyvinyl butyral resin (PVB Resin). Currently, Longcheng has its independent R&D and the annual production capability of low viscosity PVB resin 3,000 tons, high viscosity PVB resin 2,000 tons, water-based PVB resin 3,000 tons and water-based PVB emulsion 2,000 tons. Longcheng is now making itself the world-famous and professional manufacturer of PVB resins.