Process for the preparation of polyester film

Details Process for the preparation of polyester film Process for the preparation of polyester film

1995-09-25

1997-10-07

Thurlow, Jeffery R.

Plastic and nonmetallic article shaping or treating: processes

Forming continuous or indefinite length work

Shaping by extrusion

2642107, 2642902, 524425, B29C 5514

Patent

active

056744439

ABSTRACT:
A polyester film having improved surface and mechanical properties is prepared by transesterifying and polycondensing a dialkyl ester of an aromatic dicarboxylic acid and a glycol to give a polyester resin, and melt-extruding and drawing the polyester resin to give the polyester film, wherein calcium carbonate, surface treated with a titanate coupling agent by adding the titanate coupling agent to a glycol slurry containing 20 to 60 wt % of ball or rugby ball shaped vaterite type calcium carbonate having an average diameter ranging from 0.01 to 3 .mu.m is incorporated during the preparation process of the polyester resin as a slip agent.

REFERENCES:
patent: 3585259 (1971-06-01), Lefferts et al.
patent: 4840836 (1989-06-01), Eyraud
patent: 4871784 (1989-10-01), Otonari et al.
patent: 4918156 (1990-04-01), Rogers
patent: 5196472 (1993-03-01), Kimura et al.
patent: 5268135 (1993-12-01), Sasaki et al.
patent: 5316714 (1994-05-01), Yoneda et al.
patent: 5376711 (1994-12-01), Fujimoto et al.
patent: 5496618 (1996-03-01), Kurihara et al.
Newsletter of Kenrich Petrochemicals, Inc., vol. 3, No. 5, Aug. 1980.

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