Process for producing phase retarder

Details Process for producing phase retarder Process for producing phase retarder

1992-12-09

1994-11-22

Thurlow, Jeffrey R.

Plastic and nonmetallic article shaping or treating: processes

Utilizing heat releasable stress to reshape solid workpiece

264 134, 2642896, 264342R, 264DIG71, B29C 6102

Patent

active

053666828

ABSTRACT:
A process for producing a phase retarder film or sheet, which comprises subjecting a stretched thermoplastic resin film or sheet to thermal relaxation at a temperature not lower than the glass transition temperature of the thermoplastic resin to shrink the film or sheet in the stretching axis direction while suppressing the expansion of the film or sheet in a direction parallel to the film or sheet surface and perpendicular to the stretching axis.

REFERENCES:
patent: 3445561 (1969-05-01), Huff et al.
patent: 3577510 (1971-05-01), Schmitz et al.
patent: 4160799 (1979-07-01), Locey et al.
patent: 5061042 (1991-10-01), Nakamura et al.
patent: 5235450 (1993-08-01), Yoshimura et al.
patent: 5244713 (1993-09-01), Nakamura et al.
Database WPIL, Week 9019, Derwent Publications Ltd., London, GB; AN 90-143316.

Affiliated with

Also associated with

Rating

Process for producing phase retarder does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Process for producing phase retarder, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for producing phase retarder will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1989542