Stock material or miscellaneous articles – Composite – Of addition polymer from unsaturated monomers
Patent
1989-12-08
1992-05-05
Buffalow, Edith L.
Stock material or miscellaneous articles
Composite
Of addition polymer from unsaturated monomers
428500, B32B 2708
Patent
active
051106868
ABSTRACT:
The present invention provides a low temperature heat shrinkable film comprising a linear low density polyethylene resin having a short branched chain and a density of 0.935 g/cm.sup.3, and whose film properties are such that the haze value is 5% or less, the heat shrinkages at 90.degree. C. in the M and T directions are 30% or more and 5% or less, respectively, and the shrinkage stress at 90.degree. C. in the M direction is 300 g/mm.sup.2 or more. This transparent film having an excellent low temperature heat shrinkability can be produced by drawing a film of the above-mentioned polyethylene resin between two rolls having a diameter of 200 mm or less at an air gap of 10 mm or less at a draw ratio of 3.0 to 6.0. Further, an inflation film having a multilayer structure can be obtained by press bonding or press bonding and drawing a plurality of films comprising the above-mentioned polyethylene resin. This laminate film has an excellent transparency and strength, and has a uniform film thickness.
REFERENCES:
patent: 4661401 (1987-04-01), Akao
Ohkubo Takuo
Shishido Kihachi
Taka Toshio
Buffalow Edith L.
Showa Denko K.K.
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