Method of and an apparatus for thermally processing crystalline

Details Method of and an apparatus for thermally processing crystalline Method of and an apparatus for thermally processing crystalline

1990-09-14

1992-10-27

Weston, Caleb

Adhesive bonding and miscellaneous chemical manufacture

Methods

Surface bonding and/or assembly therefor

15624413, 15624414, 15624418, 15624419, 15624423, 15624424, 156250, 156256, 156500, 156510, 156512, 2642091, 2642095, 2642105, 2642107, 425113, 4251331, B29C 5528

Patent

active

051586371

ABSTRACT:
A method of and an apparatus for biaxially orienting a crystalline thermoplastic resin film and subsequently thermally processing the film with first and second heating devices, in which the temperatures of respective heaters for biaxially orienting the film are separately controlled, the first heating device being operated by a tubular method or a tenter method, and the second heating device being operated under a tenter method and above the temperature in the first heating device, whereby a melting and sticking of the film is prevented and the bowing ratio is decreased.

REFERENCES:
patent: 3576658 (1971-04-01), Notomi et al.
patent: 3577497 (1971-05-01), Matsuyu et al.
patent: 4432917 (1984-02-01), Hungerford
patent: 4704238 (1987-11-01), Okuyama et al.
patent: 4983337 (1991-01-01), Kojoh et al.

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