Method to increase the heat deflection temperature of amorphous

Details Method to increase the heat deflection temperature of amorphous Method to increase the heat deflection temperature of amorphous

1979-07-18

1980-09-30

Phynes, Lucille M.

Plastic and nonmetallic article shaping or treating: processes

Disparate treatment of article subsequent to working,...

Effecting temperature change

264 87, 264345, 264346, 528272, 528309, 528480, B29C 2500

Patent

active

042255490

ABSTRACT:
The heat deflection temperature of amorphous thermoformed polyethylene terephthalate is increased by removing absorbed and/or adsorbed water therefrom, as by heating in an oven, or by desiccation. Following drying, the material is kept in a desiccated storage vessel until time of use.

REFERENCES:
patent: 3808301 (1974-04-01), Pruden
patent: 3873664 (1975-03-01), Curtis et al.
patent: 3957941 (1976-05-01), Kawaguchi

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