Fibrillated ptfe surface

B - Operations – Transporting – 29 – C

Patent

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Details

B29C 67/20 (2006.01) B29C 33/42 (2006.01) B29C 59/02 (2006.01) B29C 67/04 (2006.01) C08J 9/24 (2006.01) G03G 15/20 (2006.01) G03G 21/00 (2006.01) G03G 21/10 (2006.01) B29C 41/08 (2006.01)

Patent

CA 2178945

A porous polytetrafluorethylene (PTFE) structure suitable for use as an oil transfer component for coating or wiping a roll in a fuser system of a copying machine, has a fibrillated surface produced by casting PTFE suspension onto a mesh and drying such that the PTFE engulfs at least some of the wires of the mesh. Removal of the PTFE sheet from the mesh results in a fibrillated irregular surface (72. 74). The PTFE structure is formed from particles of granular-type polytetrafluoroethylene fused together to form a porous integral network of interconnected particles.

Une structure poreuse de polytétrafluoroéthylène (PTFE) conçue pour être utilisée en tant qu'élément de transfert d'huile destiné à enduire ou essuyer un rouleau dans un système de fixage d'une machine à copier, présente une surface fibrillée produite par coulage d'une suspension de PTFE sur un tamis puis par séchage de celle-ci de manière que le PTFE enveloppe au moins quelques-uns des fils du tamis. L'enlèvement de la feuille de PTFE du tamis, provoque la formation sur celle-ci d'une surface irrégulière fibrillée (72, 74). La structure de PTFE est formée de particules de polytétrafluoroéthylène de type granuleux fondues ensemble de façon à former un réseau intégral poreux de particules interconnectées.

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