Gasket material

F - Mech Eng,Light,Heat,Weapons – 16 – J

Patent

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Details

F16J 15/10 (2006.01) B29C 39/02 (2006.01) B29C 43/14 (2006.01) F16J 15/06 (2006.01)

Patent

CA 2579311

A gasket material comprising polytetrafluoroethylene (PTFE) and a thermoplastic polymer having a melting point lower than the melting point of PTFE. Preferred thermoplastic polymers comprise fluorinated thermoplastic polymers, and most preferred fluorinated thermoplastic polymers comprise fluorinated ethylene propylene and perfluoroalkoxy copolymer. The PTFE component preferably comprises full density PTFE, and a filler material may optionally be added. The PTFE component is present in the gasket material in an amount from approximately 50% to less than 100%, based on the total weight of the gasket material, and the thermoplastic polymer is present in an amount from greater than 0% to approximately 20%, based on the total weight of the gasket material.

La présente invention concerne matériaux de joint comprenant un polytétrafluoroéthylène (PTFE) et un polymère thermoplastique possédant un point de fusion inférieur au point de fusion du PTFE. Des polymères thermoplastiques préférés comprennent des polymères thermoplastiques fluorés et, des polymères thermoplastiques fluorés plus préférés comprennent du propylène éthylène fluoré et un copolymère perfluoroalcoxy. Le composant PTFE comprend de préférence un PTFE de pleine densité et un matériau de charge peut éventuellement être ajouté. Ce composant PTFE est présent dans le matériau de joint dans une quantité comprise approximativement entre 50 % et moins de 100 % du poids total de ce matériau de joint et, le polymère thermoplastique présent dans une quantité supérieure à 0 % jusqu'à approximativement 20 % du poids total de ce matériau de joint.

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