Bonding unsintered non-expanded PTFE film to PTFE coated...

Adhesive bonding and miscellaneous chemical manufacture – Methods – Surface bonding and/or assembly therefor

Reexamination Certificate

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Details

C156S309900

Reexamination Certificate

active

07087136

ABSTRACT:
A method of bonding an unsintered unexpanded PTFE feed film to a flexible PTFE coated substrate comprises providing a three roll calender comprising a metal surfaced roll coacting with two filled rolls to define first and second nips. The PTFE feed film is calendered in the first nip, with the thus calendered PTFE film remaining supported on the metal surfaced roll for transport to and through the second nip. The PTFE coated substrate is directed through the second nip for calendering with and bonding to the calendered PTFE film to thereby produce a laminated composite.

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patent: 2003/0062644 (2003-04-01), Oyama et al.
patent: 0 288 214 (1988-04-01), None
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patent: 1 090 676 (2000-08-01), None
patent: 2 155 853 (1985-10-01), None
patent: WO 92/09429 (1992-06-01), None
patent: WO 99/07551 (1999-02-01), None

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