Bag having excellent blocking resistance

Details Bag having excellent blocking resistance Bag having excellent blocking resistance

1989-10-26

1992-06-09

Seidleck, James J.

Stock material or miscellaneous articles

Hollow or container type article

Nonself-supporting tubular film or bag

428 355, 428483, 525177, 383109, 383113, B29D 2200, C08L 7700

Patent

active

051205866

ABSTRACT:
Bags having increased blocking resistance properties are formed of a film composed of a resin blend of a polyethylene (PE) resin and a polybutylene terephthalate (PBT) resin having an intrinsic viscosity or 0.7 of more. Preferably, the film is a multi-layer structure formed via coextrusion inflation molding techniques having inner and outer layers laminated to one another. The inner layer is a polyolefin, while the outer layer is composed of a PE/PBT blend, in which the PBT is present in an amount of between 5 to 30 wt. % based on the total weight of the resin composition and has a melt index of 0.7 or more. The thickness ratio of the internal layer to the external layer is preferably between 95/5 to 30/70.

REFERENCES:
patent: 4118438 (1978-10-01), Matsui et al.
patent: 4265949 (1981-05-01), Kugimiya

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