Process for preparing polyamide film

Details Process for preparing polyamide film Process for preparing polyamide film

1990-03-06

1991-03-19

Lowe, James

Plastic and nonmetallic article shaping or treating: processes

Carbonizing to form article

Agglomeration or accretion

2642101, 2642106, 264211, 4251748E, B29D 701

Patent

active

050008897

ABSTRACT:
A process for preparing a polyamide type film which comprises melt-extruding a polyamide resin having a metal compound and a melt specific resistance of not more than 1.5.times.10.sup.5 .OMEGA.cm at 260.degree. C. in a form of a film, contacting the melt-extruded film closely with a revolving cooling drum through static electricity and taking up the film while cooling rapidly to solidify, which provides remarkable improved adhesion by static electricity. As a result, increasing the take-up rate of the revolving cooling drum does not cause trapping of air between the drum and the film so that a film having excellent uniformity in thickness and transparency can be produced.

REFERENCES:
patent: 3642971 (1972-02-01), Wolfgang et al.
patent: 3898200 (1975-08-01), Lofquist
patent: 4111625 (1978-09-01), Remmington et al.
patent: 4268464 (1981-05-01), Yoshimo et al.
patent: 4472338 (1984-09-01), Hermann et al.

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