Extruding vinylidene chloride copolymer flexible packaging film

Details Extruding vinylidene chloride copolymer flexible packaging film Extruding vinylidene chloride copolymer flexible packaging film

1991-03-25

1992-09-15

Thurlow, Jeffery

Plastic and nonmetallic article shaping or treating: processes

Direct application of fluid pressure differential to...

Producing multilayer work or article

264 22, 264173, 264211, B29C 4706

Patent

active

051475944

ABSTRACT:
This invention relates to extruding films made from vinylidene chloride copolymers. Specifically, this invention relates to a method for lowering the oxygen permeability and enhancing the thermal stability and enhancing the melt shear stability of packaging films having a layer of vinylidene chloride copolymer film by adding a processing aid such as an epoxy resin to vinylidene chloride copolymer of low molecular weight. The conventional stabilizer/plasticizer combination of epoxy resin and 2-ethyl-hexyl diphenyl phosphate may be employed with the vinylidene chloride copolymer. The layer of vinylidene chloride copolymer can be as thin as 0.18 mil.

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