Process for coating nylon film with vinylidene chloride copolyme

Details Process for coating nylon film with vinylidene chloride copolyme Process for coating nylon film with vinylidene chloride copolyme

1982-08-16

1984-03-20

Herbert, Jr., Thomas J.

Stock material or miscellaneous articles

Composite

Of polyamide

427379, 4273855, 4273935, 4274071, 4274121, 4284761, 428518, B23B 2708

Patent

active

044381808

ABSTRACT:
A process for coating nylon film with polyvinylidene chloride is disclosed, comprising primer-coating the nylon film with an aqueous dispersion of a vinylidene chloride copolymer having a crystallinity index of less than 1.15 after 30 days' storage at 20.degree. C. and between about 1.05 and 1.20 when stored for 48 hours at 40.degree. C.; drying the primer-coated film; coating the primer-coated film with an aqueous dispersion of a vinylidene chloride copolymer capable of developing crystallinity to a level sufficient that the crystalline vinylidene chloride copolymer so-formed resists attack by an organic solvent, as measured by the Solvent Haze Test; and drying the coated film. During primer-coating and the first drying step, the film is kept under sufficient tension to prevent curling of the film. The coated film may be laminated to polyethylene to provide a laminate useful for packaging of processed food.

REFERENCES:
patent: 3514367 (1970-05-01), James
patent: 3805848 (1974-04-01), Chrow

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