Title:
METHOD AND APPARATUS FOR PRODUCING POLYBUTYLENE TEREPHTHALATE FILM, AND SHAPE-MEMORY POLYBUTYLENE TEREPHTHALATE LAMINATED FILM
Document Type and Number:
WIPO Patent Application WO/2004/026558
Kind Code:
A1
Abstract:
A method for producing a polybutylene terephthalate film by the air-cooling inflation method involving inflating a tube of a molten polybutylene terephthalate resin extruded from a ring die by means of the injection of air, characterized in that the resin is extruded under a resin pressure of 8.3 to 13.7 MPa and at a resin temperature of from the melting point of the above polybutylene terephthalate resin - 15°C to the above melting point - 5°C.
Inventors:
KAGAWA SEIJI (JP)
Application Number:
PCT/JP2003/012103
Publication Date:
April 01, 2004
Filing Date:
September 22, 2003
Export Citation:
Assignee:
KAGAWA SEIJI (JP)
International Classes:
B29C48/08; B29C48/10; B29C48/18; B29C48/90; B29C48/91; B29C48/92; B29C55/28; B29C61/06; B32B27/06; B32B27/36; B32B37/20; B65D77/20; B29C35/16; B32B37/12; B32B37/15; (IPC1-7): B29C47/00; B29C55/28; B32B27/36
Foreign References:
| EP0641638A1 | 1995-03-08 | |||
| JPH02261624A | 1990-10-24 | |||
| JPS5140904B2 | 1976-11-06 | |||
| JP2000052397A | 2000-02-22 | |||
| JPH0752238A | 1995-02-28 | |||
| EP1059326A2 | 2000-12-13 | |||
| JPH02123129A | 1990-05-10 | |||
| JP2002059487A | 2002-02-26 |
Other References:
See also references of EP 1547750A4
Attorney, Agent or Firm:
Takaishi, Kitsuma (67 Kagurazaka 6-chom, Shinjuku-ku Tokyo, JP)
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