Plastic and nonmetallic article shaping or treating: processes – Disparate treatment of article subsequent to working,... – Effecting temperature change
Patent
1979-03-26
1980-10-28
Lowe, James B.
Plastic and nonmetallic article shaping or treating: processes
Disparate treatment of article subsequent to working,...
Effecting temperature change
2642902, B29C 1702
Patent
active
042306582
ABSTRACT:
A biaxially drawn thermoplastic polyester film is prepared by concurrent-biaxially drawing a thermoplastic polyester film by a tenter method at a drawing temperature higher than the glass transition temperature of the thermoplastic polyester while maintaining the preheating temperature of the film just prior to drawing at a level greater than the drawing temperature and maintaining the subsequent heat-treating temperature immediately after drawing lower than the preheating temperature and carrying out a reheat-treating process in a plurality of steps while elevating the temperature in each step over a substantially equal temperature range.
REFERENCES:
patent: 2823421 (1958-02-01), Scarlett
patent: 2968065 (1961-01-01), Gronholz
patent: 2968067 (1961-01-01), Long
patent: 2995779 (1961-08-01), Winter
patent: 3107139 (1963-10-01), Cornforth et al.
patent: 3432591 (1969-03-01), Heffelfinger
patent: 3461199 (1969-08-01), Campbell
patent: 3890421 (1975-06-01), Habozit
patent: 4042569 (1977-08-01), Bell et al.
patent: 4110395 (1978-08-01), Akutin
patent: 4153667 (1979-05-01), Brady et al.
Hayashi Tadashi
Kozuma Akiyoshi
Matsukura Kazuo
Murakami Kunio
Nagasawa Tsugio
Lowe James B.
Unitika Limited
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