Packaging material

Details Packaging material Packaging material

1984-10-05

1986-05-20

Buffalow, Edith

Stock material or miscellaneous articles

Composite

Of addition polymer from unsaturated monomers

428 35, 525 59, 525 60, B32B 2708

Patent

active

045901317

ABSTRACT:
Disclosed in a packaging material having at least one layer comprising an ethylene-vinyl alcohol copolymer having a vinyl alcohol content of 40 to 80 mole % and a residual vinyl ester content lower than 4 mole %, wherein the ethylene-vinyl alcohol copolymer consists of a composition comprising a plurality of copolymers differing in the vinyl alcohol content, said composition shows a plurality of endothermic peaks in a fusion curve by a differential scanning calorimeter, the composition has fusion characteristics satisfying requirements represented by the following formulae: ##EQU1## wherein Sc represents an area of a triangle defined by a base line connecting the skirt of a high temperature side peak to the skirt of a low temperature side peak in two adjacent peaks in said fusion curve and lines connecting the skirts of both the peaks to the trough between both the peaks, Sa represents an area of the high temperature side peak above said triangle, Sb represents an area of the low temperature side peak above said triangle, Ta represents a peak temperature of the high temperature side peak and Tb represents a peak temperature of the low temperature side peak,
and the composition has a molecular weight distribution (Mw/Mn) of at least 2.5.
This packaging material is excellent in the gas barrier property, especially the oxygen permeation resistance under a high humidity condition, and the mechanical properties and processability.

REFERENCES:
patent: 3560325 (1971-02-01), Sogi et al.
patent: 4064296 (1977-12-01), Bornstein et al.
patent: 4082854 (1978-04-01), Yamada et al.
patent: 4239826 (1980-12-01), Knott et al.
patent: 4254169 (1981-03-01), Schroeder
patent: 4464943 (1984-08-01), Farrell et al.

Affiliated with

Also associated with

Rating

Packaging material does not yet have a rating. At this time, there are no reviews or comments for this patent.

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

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2108484