Composite polytetrafluoroethylene article and a process for maki

Details Composite polytetrafluoroethylene article and a process for maki Composite polytetrafluoroethylene article and a process for maki

1980-02-14

1981-08-11

Hoag, W. E.

Stock material or miscellaneous articles

Hollow or container type article

Polymer or resin containing

138103, 138DIG3, 156 86, 156187, 1563046, 239145, 239547, 264230, 264248, 428421, B29C 2702, B29D 2300

Patent

active

042834481

ABSTRACT:
A porous polytetrafluoroethylene (PTFE) article which is made up of a number of smaller articles with a microstructure of nodes interconnected by fibrils, these articles having been joined to one another such that their microstructure is virtually unaltered across the join. A process for producing such a PTFE article by closely abutting small-shaped PTFE segments and applying a force perpendicular to the seam while heating to a temperature above the crystalline melt point of the segments.

REFERENCES:
patent: 612897 (1898-10-01), Ellis
patent: 3207644 (1965-09-01), Hobson et al.
patent: 3767500 (1973-10-01), Tally et al.
patent: 3953566 (1976-04-01), Gore
patent: 4061517 (1977-12-01), Dutton et al.

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