Reusable resilient gasket and method for using same

Details Reusable resilient gasket and method for using same Reusable resilient gasket and method for using same

C - Chemistry, Metallurgy

08

J

C08J 9/32 (2006.01) B32B 5/18 (2006.01) B32B 7/12 (2006.01) C08J 9/22 (2006.01) C09K 3/10 (2006.01)

Patent

CA 2178494

An improved gasket particularly suitable for use in sensitive environments is disclosed. The preferred gasket of the present invention comprises at least one layer of a composite material of porous polytetrafluo- roethylene (PTFE) polymer and resilient expandable mi- crospheres. The composite material provides a number of significant advantages over existing PTFE and similar clean gaskets, including better seal under less compres- sive pressure, sufficient resilience to permit reuse, and retained porosity-allowing pressure equalization in the equipment to occur through the gasket itself.

On décrit un joint d'étanchéité amélioré convenant particulièrement bien à des environnements sensibles. Le joint d'étanchéité préféré de la présente invention comprend au moins une couche d'un matériau composite, constitué de polytétrafluoroéthylène (PTFE) poreux et de microsphères élastiques expansibles. Le matériau composite a plusieurs avantages importants par rapport aux joints existants en PTFE et similaire, en particulier une meilleur étanchéité sous une pression de compression moindre, une élasticité suffisante pour permettre sa réutilisation et la conservation de la porosité permettant une égalisation de pression dans l'équipement à travers le joint.

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