Paperboard container having polymethylpentene coating

Details Paperboard container having polymethylpentene coating Paperboard container having polymethylpentene coating

1993-09-10

1995-10-03

Nold, Charles R.

Stock material or miscellaneous articles

Hollow or container type article

Paper containing

4284796, 428513, 428 359, 220458, 229903, 426106, 426113, 426126, 426127, A21D 1002

Patent

active

054550866

ABSTRACT:
A blank for a paperboard container is provided on one of its surfaces with a layer of food-contacting polymethylpentene. The container formed from the blank, as by bending the blank along fold lines, requires one or more overlapped joints such as the usual manufacturer's joint. To overcome the non-stick properties of the polymethylpentene layer, the layer is flame treated so that it will adhere to a conventional water based, FDA approved adhesive and thereby make possible the formation of a seam or other overlapped joint or joints. Flame treatment is restricted to portions of the area of the polymethylpentene layer that are involved in the formation of the overlapped joint or joints. Alternatives to flame treatment include corona treatment, solvent treatment or treatment of the polymethylpentene surface with a solvent based primer.

REFERENCES:
patent: 2648097 (1953-08-01), Kritchever
patent: 2767103 (1956-10-01), Loukomsky
patent: 4316070 (1982-02-01), Prosise
patent: 4622237 (1986-11-01), Lori
patent: 4818325 (1989-04-01), Hiraiwa
patent: 4828136 (1989-05-01), Kawahara
patent: 4853253 (1989-08-01), Katoh
patent: 4896788 (1990-01-01), Bolte
patent: 4952293 (1990-08-01), Sypula
patent: 5256427 (1993-10-01), Quick et al.

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