In this project, we used the environmental friendly Liquid Silicone Rubber(LSR) by modified, to replace Poly vinyl chloride (PVC) gasket of lug cap. Modified Liquid Silicone Rubber(LSR) could not only solve the problems of food safety and environment, but also correspond the manufacture process now. In cannery, Silicone itself without adding any plasticizers and heavy metals, so they can completely pass the plasticizer leaching testing(EN14372), heavy metal leaching testing(EN13130-1), and food safety specific(EN1186-1) of lug cap. In viscosity testing, After modifying the viscosity could be controlled in the following 7500cps(centipoises). so it could correspond to the spin-coating process. And we still could control the crosslinking reaction time is within 150 seconds in.Otherwise, heat-resistant properties of silicone rubber can be up to 200℃, and it could stable in the high temperature sterilization for 90 minutes at 125℃. Finally, we modified the prescription to improve physical property and lubricating, so it could meet the specification of goods, torque testing in 30~40kgf．cm. We hoped the new materials can be popularized to lug caps by Plastics Industry Development Center (PIDC), and gradually replaced the Poly vinyl chloride (PVC) gasket products in the future.

PVC;LSR;Lug Cap;Spin-coating