초록 ▼

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 polytetrafluoroethylene (PTFE) polymer and resilient expandable microspheres. The composite material p

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 polytetrafluoroethylene (PTFE) polymer and resilient expandable microspheres. The composite material provides a number of significant advantages over existing PTFE and similar clean gaskets, including better seal under less compressive pressure, sufficient resilience to permit reuse, and retained porosity--allowing pressure equalization in the equipment to occur through the gasket itself.

대표청구항 ▼

[ The invention claimed is:] [1.] A resilient gasket which comprises:at least one layer of a composite material comprising an expanded polytetrafluoroethylene (PTFE) polymer comprising polymeric nodes interconnected by fibrils and resilient microspheres bound within the composite material by the nod

[ The invention claimed is:] [1.] A resilient gasket which comprises:at least one layer of a composite material comprising an expanded polytetrafluoroethylene (PTFE) polymer comprising polymeric nodes interconnected by fibrils and resilient microspheres bound within the composite material by the nodes and fibrils, wherein the microspheres comprise about 1% to about 5% by weight of the composite characterized by a microstructure wherein the nodes and fibrils are created by mechanical stretching;wherein the composite material is resistant to deformation, providing sufficient resilience to permit the gasket to be reused.