Peel-open package

Details Peel-open package Peel-open package

1996-07-12

1998-11-03

Raimund, Christopher

Stock material or miscellaneous articles

Hollow or container type article

Polymer or resin containing

428 365, 206363, 206439, B29D 2200

Patent

active

058305475

ABSTRACT:
A peel-open package includes a polymeric film, a lid adhered to the polymeric film along a continuous portion thereof and a product encapsulated between the polymeric film and lid material. The polymeric film is typically a coextruded multiple layer film having a sealable layer and at least one base layer. The sealable layer comprises an ethylene copolymer derived from at least one monomer selected from the group consisting of vinyl acetate and alkylacrylates, a talc additive, and an additive which provides peelability to the heat seal layer. The lid material is preferably a microporous layer to allow sterilization and prevent subsequent contamination by bacteria and other microbial organisms. The peel-open package provides a good seal range for uncoated Tyvek.RTM., evidence of seal integrity, reduced Tinting, and a seal strength which is sufficiently low to prevent the delaminating or branching of the lid material when it is removed. The present invention also includes methods of making peel-open packages.

REFERENCES:
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patent: 5516583 (1996-05-01), Zhang et al.
patent: 5626929 (1997-05-01), Stevenson
European Patent Office, International Search Report for PCT/IB 97/00862, completed Oct. 27, 1997 by P. Olle.
"Coated Vs. Uncoated Webs In Thermoform/Fill/Seal"; Randall D. Brinkman; Paper Film Foil Conv. 1984, 58, No. 10, Oct. 19, 1984; pp. 78-82.

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