Process for the preparation of polyester film
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Oct 7, 1997
Grant Date -
N/A
app pub date -
Sep 25, 1995
filing date -
Sep 26, 1994
priority date (Note) -
Expired
status (Latency Note)
Importance
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.
First Claim
Family
International Classification(s)
Cited Art Landscape
Patent Citation Ranking
Recipient Email Address
Recipient Email Address
Comment
Recipient Email Address
Add to Portfolio(s)
To add this patent to one, or more, of your portfolios, simply click the add button.
This Patent is in these Portfolios:
Add to additional portfolios:
Last Refreshed On:
Changes done successfully