Title:
POLYESTER FILM CONTAINING FINE CELLS
Document Type and Number:
WIPO Patent Application WO/1988/005797
Kind Code:
A1
Abstract:
A polyester film containing fine cells is obtained by extrusion-molding into sheet a composition comprising aromatic polyester, 3 to 20 wt %, based on the polyester, of crystalline polypropylene having a melt-flow index of 0.2 to 120, and 0.001 to 3 wt %, based on the sum of the amount of the polyester and that of the polypropylene, of a surfactant, and stretching the sheet in at least one direction. Since this polyester film contains innumerable fine closed cells, it has a small apparent specific gravity and shows a large hiding power when titanium oxide is added thereto in only a small amount or even not added, thus being preferably utilized as base materials for various products in plate-making or information industry.
Inventors:
OTONARI SATOSHI (JP)
SATO YOSHINORI (JP)
MASUDA NARIHIRO (JP)
KOTANI TOMOYUKI (JP)
SATO YOSHINORI (JP)
MASUDA NARIHIRO (JP)
KOTANI TOMOYUKI (JP)
Application Number:
PCT/JP1988/000110
Publication Date:
August 11, 1988
Filing Date:
February 05, 1988
Export Citation:
Assignee:
DIAFOIL CO LTD (JP)
International Classes:
B29C55/02; C08J5/18; C08J9/00; C08L67/00; C08L67/02; C08L67/03; B29K67/00; B29K105/04; B29L7/00; (IPC1-7): C08J9/00
Foreign References:
| JPS51123282A | 1976-10-27 | |||
| JPS50146675A | 1975-11-25 | |||
| JPS50116537A | 1975-09-11 | |||
| JPS5129191B2 | 1976-08-24 | |||
| JPS5118462B1 | 1976-06-10 |
Other References:
See also references of EP 0300060A4
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