Multiple wall packaging material containing sulfite compound

Details Multiple wall packaging material containing sulfite compound Multiple wall packaging material containing sulfite compound

1976-11-26

1977-08-09

Robinson, Ellis

Stock material or miscellaneous articles

Composite

Of addition polymer from unsaturated monomers

206484, 426124, 426127, 426131, 426133, 426323, 426324, 426415, 428 35, 428510, 428518, 428522, 428537, 428539, 428913, B65D 8128, B32B 2732, B32B 2106

Patent

active

040412091

ABSTRACT:
A structural multiple ply wall for a product container has an inner container sheet ply having a composition providing low product permeability through the ply for a product disposed adjacent to a first face of the ply. A fluid coating consisting of an aqueous solution of a reducing sulfite salt is disposed adjacent to the second face of the inner sheet ply, the coating actively reacting with oxygen gas from the adjacent atmosphere. At least one sheet exterior ply has one face of one of the exterior ply disposed adjacent to the fluid coating. The exterior ply can have a composition providing low oxygen permeability through the sheet exterior ply. The inner sheet ply, the liquid coating, and the sheet exterior ply are contiguously integrally disposed together forming the structural multiple ply wall. The wall is formed into a product container providing at least the major proportion of the container wall area. A method of manufacturing the multiple ply wall is taught.

REFERENCES:
patent: 1584903 (1926-05-01), Supplee
patent: 2979410 (1961-04-01), Parlour
patent: 3052553 (1962-09-01), McKillip
patent: 3429717 (1969-02-01), Cook
patent: 3852489 (1974-12-01), Yip
E. R. Sherwin, "Antioxidants for Food Fats and Oils," J. of the Amer. Oil Chemists Soc., vol. 49, (No. 8), pp. 468-472 (1972).

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