Plastic and nonmetallic article shaping or treating: processes – Forming continuous or indefinite length work – Layered – stratified traversely of length – or multiphase...
Patent
1976-08-04
1978-07-04
Thurlow, Jeffery R.
Plastic and nonmetallic article shaping or treating: processes
Forming continuous or indefinite length work
Layered, stratified traversely of length, or multiphase...
260857TW, 264210R, 264289, 264290N, B29D 724
Patent
active
040988600
ABSTRACT:
A process for preparing a biaxially stretched film of polyamide blend, which comprises (1) extruding a polyamide blend in melt to make an unstretched film and (2) stretching the unstretched film first in a machine direction with a stretch speed of about 40,000 to 60,000,000 %/minute in a draw ratio of about 2 to 6 and then in a transverse direction with a stretch speed of about 500 to 100,000 %/minute in a draw ratio of about 2 to 6, or (2') stretching the unstretched film first to make a uniaxially stretched film having a plane orientation index of about 0.6 to 1.5 and then stretching the uniaxially stretched film in a direction being substantially at a right angle to the direction at the previous stretching, said polyamide blend comprising an aliphatic polyamide and a polyamide containing in the molecule at least about 70 mol % of the repeating units constituted with metaxylylenediamine or its mixture with paraxylylenediamine (of which the content is not more than about 30 mol % based on the combined amount of metaxylylenediamine and paraxylylenediamine) and at least one .alpha.,.omega.-aliphatic dicarboxylic acid having 6 to 10 carbon atoms in a proportion of about 97 : 3 to 80 : 20 by weight.
REFERENCES:
patent: 3637906 (1972-01-01), Parathoen
patent: 3652759 (1972-03-01), Schlemmer et al.
patent: 3843479 (1974-10-01), Matsunami et al.
patent: 3968071 (1976-07-01), Miyamoto et al.
Macromolecular Chemie-, 33, 1, 1959-Kinoshita, pp. 1-20.
Etou Yoshitaka
Gunji Katsumi
Matsumoto Shizuo
Matsunami Koichi
Matsuoka Mikio
Thurlow Jeffery R.
Toyo Boseki Kabushiki Kaisha
LandOfFree
Production of biaxially drawn film of polyamide blend does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Production of biaxially drawn film of polyamide blend, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Production of biaxially drawn film of polyamide blend will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-277990