Method and apparatus for forming elongate PTFE material and PTFE

Details Method and apparatus for forming elongate PTFE material and PTFE Method and apparatus for forming elongate PTFE material and PTFE

1995-10-02

1997-08-19

Mancene, Gene

Toilet

Toothpick

132323, 132324, 132480, 132339, A61C 1500

Patent

active

056577796

ABSTRACT:
An elongate PTFE material is formed by passing an unsintered PTFE tape across a heated surface in sliding contact therewith while applying tension to the tape, such that the PTFE tape, when its temperature is raised by contact with the heated surface, is longitudinally stretched with simultaneous width and thickness reduction while in contact with the surface. PTFE tapes having different properties, e.g. coefficients of friction at opposite faces can be produced. Such tapes are suitable for use as dental flosses.

REFERENCES:
patent: 3953566 (1976-04-01), Gore
patent: 3962153 (1976-06-01), Gore
patent: 4208745 (1980-06-01), Okita
patent: 4277429 (1981-07-01), Okita
patent: 4776358 (1988-10-01), Lorch
patent: 5220932 (1993-06-01), Blass
patent: 5392794 (1995-02-01), Striebel

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