Packaging and wrapping film

Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Polymers from only ethylenic monomers or processes of...

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Details

5263482, 526352, 5263522, 5263486, 526943, C08F 1002, C08F 1014

Patent

active

058521526

ABSTRACT:
Biaxially oriented, heat-shrinkable film-making process and film with improved toughness and extrusion processibility are disclosed. The improved film comprises at least one layer of at least one substantially linear ethylene homopolymer or interpolymer, wherein the substantially linear ethylene polymer has an uniform branching distribution, and is also characterized as having essentially no linear polymer fraction, a single DSC melting peak, a density greater than about 0.85 g/cc, and a simple bubble film 1% secant modulus below 195,000 kPa. The biaxially oriented film is characterized as having a simple bubble shrinkage value of from about 18% to about 85% at 135.degree. C. and is useful in preparing heat-shrink bags for packaging food articles like poultry and fresh red meat.

REFERENCES:
patent: 5278272 (1994-01-01), Lai et al.
patent: 5589561 (1996-12-01), Barry et al.

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