Title:
HEAT-RESISTANT ROLL-SHAPED FILM AND PRODUCTION THEREOF
Document Type and Number:
Japanese Patent JP3862292
Kind Code:
B2
Abstract:
PURPOSE: To reduce the lowering of flatness before and during processing, in a heat-resistant roll-shaped film with the coefficient of moisture absorption expansion of a specific value, by setting an average moisture absorption rate to a specific value range of a film equilibrium moisture absorption rate at specific relative humidity and setting the irregularity of the moisture absorption rate measured at the arbitrary place of the film to a specific value of an average moisture absorption rate or less.
CONSTITUTION: A heat-resistant roll-shaped film is characterized by that an average absorption rate is 30-100% of a film equilibrium moisture absorption rate under a 25°C/60% RH condition and the irregularity of the moisture absorption rate measured at the arbitrary place of the film is within ±30% of the average moisture absorption rate. The coefficient of moisture absorption expansion of the film is set to 3-100ppm/% RH. By this constitution, a heat-resistant film having good flatness is obtained.
Inventors:
Takashi Fujiwara
Application Number:
JP18556294A
Publication Date:
December 27, 2006
Filing Date:
August 08, 1994
Export Citation:
Assignee:
Asahi Kasei Chemicals Corporation
International Classes:
B29D7/01; C08J5/18; B29K67/00; B29K77/00; B29K79/00; (IPC1-7): B29D7/01; C08J5/18; //B29K67:00; B29K79:00
Domestic Patent References:
| JP4125126A | ||||
| JP5261806A | ||||
| JP2222430A | ||||
| JP1207331A | ||||
| JP7100916A |
Attorney, Agent or Firm:
Hideo Takei
Takeshi Shimizu
Joi Ito
Yoshio Narui
Takeshi Shimizu
Joi Ito
Yoshio Narui