Cold drawn high-orientation multilayered film and process for ma

Details Cold drawn high-orientation multilayered film and process for ma Cold drawn high-orientation multilayered film and process for ma

1983-12-08

1984-09-04

McCamish, Marion

Stock material or miscellaneous articles

Composite

Of polyamide

4284761, 428483, 428500, 428515, 428518, 428910, B32B 2708

Patent

active

044697520

ABSTRACT:
A high-orientation multilayered film incorporates at least one cold drawn, highly oriented resin layer excellent in mechanical strength and suitable mainly for use as packaging material. Because of its specific stratal construction which is highly adaptable to afford a wide variety of specific functions, the composite film is suitable for manufacture of thermally shrinkable films which excel in transparency and in ability to shrink rapidly particularly at low temperatures. Also disclosed is a process for drawing at specific low temperatures at high expansion ratios the aforementioned multiplicity of resin layers either all by themselves or in conjunction with layers of other resins by utilizing the cold drawability of the aforementioned resin layers excelling in mechanical strength.

REFERENCES:
patent: 3375126 (1968-03-01), Nagel
patent: 3524795 (1970-08-01), Peterson
patent: 3579416 (1971-05-01), Schrenk
patent: 3682767 (1972-08-01), Britton
patent: 3847728 (1974-11-01), Hirata
patent: 3908070 (1975-09-01), Marzoif
patent: 4082877 (1978-04-01), Shadle
patent: 4112181 (1978-09-01), Baird
patent: 4161562 (1979-07-01), Yoshikawa

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