Biaxially oriented polyoxymethylene film

Details Biaxially oriented polyoxymethylene film Biaxially oriented polyoxymethylene film

1989-03-20

1990-10-09

Foelak, Morton

Stock material or miscellaneous articles

Composite

Of aldehyde or ketone condensation product

428694, 428900, 428910, B29C 5512, B32B 2742

Patent

active

049620010

ABSTRACT:
This present invention provides a biaxially oriented film of a polyoxymethylene polymer having the main part of each of the main chains thereof substantially composed of repeating units of the oxymethylene group, --CH.sub.2 --O--, which biaxially oriented polyoxymethylene polymer film is characterized by the fact that the crystallinity thereof measured by the density method is in the range of 75 to 95% and the degree of crystal orientation measured by the X-ray diffraction method in the two directions of end and edge are each in the range of 80 to 98%. This film possesses a high modulus of elasticity, outstanding dimensional stability, and low equilibrium water absorption ratio and, therefore, it is particularly suitable as a base film of a magnetic recording medium. This film is produced by accurately controlling the orientation conditions and other processing conditions.

REFERENCES:
patent: 4835245 (1989-05-01), Takasa et al.

Affiliated with

Also associated with

Rating

Biaxially oriented polyoxymethylene film does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Biaxially oriented polyoxymethylene film, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Biaxially oriented polyoxymethylene film will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-972832