Rubber stoppers are used in a variety of applications, including sealing containers and vials. To enhance their performance, rubber stoppers can be coated with different materials. Some common coatings used on rubber stoppers include:
Silicone coating: This type of coating is made from a silicone polymer and is widely used in the pharmaceutical industry. It provides excellent barrier properties, is resistant to chemical attack, and has a low coefficient of friction, making it easy to insert and remove the stopper. Silicone coatings can be applied using various methods, including spraying, dipping, and brushing.
Teflon coating: Teflon is a fluoropolymer that is used to coat rubber stoppers. It provides excellent chemical resistance and can withstand high temperatures. Teflon-coated stoppers are commonly used in applications where harsh chemicals are present.
FluoroTec® coating: This is a proprietary coating developed by West Pharmaceutical Services, Inc. It is a composite coating that combines silicone and Teflon to provide the benefits of both materials. It has excellent lubricity and chemical resistance and is commonly used in pharmaceutical and biotech applications.
Chlorobutyl coating: Chlorobutyl rubber is a synthetic rubber that is coated onto the stopper. It provides excellent barrier properties and is resistant to chemical attack. Chlorobutyl-coated stoppers are commonly used in the pharmaceutical industry for vials and bottles.
Fluorosilicone coating: This type of coating is a combination of silicone and fluorocarbon. It provides excellent chemical resistance and is commonly used in applications where harsh chemicals are present.
Overall, the type of coating used on a rubber stopper depends on the specific application and the desired properties. Each coating has its advantages and disadvantages, and the choice of coating will depend on the requirements of the application.
klstopper.com