Antistatic, low temperature heat sealable polypropylene composit

Details Antistatic, low temperature heat sealable polypropylene composit Antistatic, low temperature heat sealable polypropylene composit

1977-04-13

1978-09-26

Ansher, Harold

Stock material or miscellaneous articles

Web or sheet containing structurally defined element or...

Physical dimension specified

156164, 156229, 15624417, 156272, 428474, 428516, 428523, 428539, 428910, B32B 702, B32B 2708, B32B 2716, B32B 2732

Patent

active

041171934

ABSTRACT:
There is disclosed a novel composite film prepared by melt extrusion laminating a polymer blend composition comprising a low-crystalline resin of an ethylene-butene copolymer and a polyolefin resin having incorporated therein a lubricant and an anti-blocking agent onto a surface or surfaces of a uniaxially stretched polypropylene film followed by stretching the laminate film in the direction perpendicular to the direction in which said polypropylene has been stretched and optionally subjecting the resulting film to corona discharge treatment. The composite film thus made provides an excellent packaging material because of its improved antistatic, lubricating and anti-blocking properties in addition to its heat sealability feasible at lower temperatures than prior art materials.

REFERENCES:
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patent: 2833671 (1958-06-01), Funk et al.
patent: 3397101 (1968-08-01), Rausing
patent: 3496061 (1970-02-01), Freshour et al.
patent: 3501363 (1970-03-01), Kirkpatrick
patent: 3697368 (1972-10-01), Bhuta et al.
patent: 3788923 (1974-01-01), Soliman
patent: 3840427 (1974-10-01), Brazier et al.
patent: 3870593 (1975-03-01), Elton et al.
patent: 3912843 (1975-10-01), Brazier
patent: 4048428 (1977-09-01), Baird et al.

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