Heat resistant ovenable paperboard

Details Heat resistant ovenable paperboard Heat resistant ovenable paperboard

1984-03-05

1985-09-24

Ives, Patricia C.

Stock material or miscellaneous articles

Hollow or container type article

Cellular material derived from plant or animal source

428328, 428483, 428342, 428514, 428522, 428414, 4284752, 4284747, 220458, 427361, 427365, 264176R, B65D 1102, B32B 516, B32B 2710

Patent

active

045432805

ABSTRACT:
A pigmented coating composition comprising a pigment consisting of kaolin clay or TiO.sub.2 or the mixture thereof, or a pigment wherein Al(OH).sub.3 is further blended therein, and also comprising an adhesive consisting of crosslinkable ethylenevinylacetate copolymer aqueous emulsion combined with a crosslinker or of crosslinkable polyacrylate copolymer aqueous emulsion combined with a crosslinker of water-soluble polymaidepolyurea resin and the pigment above and the mixed adhesive are formulated in a ratio of 85:15 to 70:30 as coating composition. This pigmented adhesive composition is primed on the substrate paperboard. Thereby finished ovenable paperboards, being capable of retaining the brightness at least 45% against the heat-treatment of 250.degree. C. for 20 minutes, is free from scorch even in an electrically heating oven and is excellent in adhesion to extrusion-laminating plastic layer.

REFERENCES:
patent: 4241143 (1980-12-01), Ashie et al.
patent: 4336345 (1982-06-01), Lewis et al.
patent: 4343858 (1982-08-01), Thompson
patent: 4418119 (1983-11-01), Morrow et al.

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