Black food containers
AssigneeDixie Consumer Products LLC
InventorDonald C. McCarthy
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Abstract
A black pigmented disposable food container is preferably made from a polypropylene matrix polymer, optionally including polyethylene and further includes a mineral filler and a black colorant composition consisting essentially of a black iron oxide pigment and a green pigment.
Claims28
A thermoformed disposable food container formed from a thermoplastic sheet material comprising polypropylene, wherein the sheet is pigmented black with a colorant composition consisting essentially of a black iron oxide pigment and phthalocyanine green, the weight ratio of black iron oxide pigment to phthalocyanine green being at least about 10:1 and said black iron oxide pigment is present in an amount of up to about 5 weight percent of the container, and wherein further the sheet material exhibits a lower extractables content in heptane compared to a like sheet material pigmented black with carbon black.
A thermoformed disposable food container made from a black-pigmented, mineral-filled polypropylene sheet comprising from about 30 to about 80 percent by weight of a matrix polymer composition comprising a polypropylene polymer and optionally including a polyethylene polymer, from about 10 to about 60 weight percent of a mineral filler, wherein said container is pigmented with a black colorant composition consisting essentially of a black iron oxide pigment and phthalocyanine green, the weight ratio of black iron oxide pigment to phthalocyanine green is at least about 10:1, and said black iron oxide pigment is present in an amount up to about of 5 weight percent of said container, and wherein further the sheet material exhibits a lower extractables content in heptane compared to a like sheet material pigmented black with carbon black.
A thermoformed disposable food container made from a black-pigmented, mineral-filled polypropylene sheet comprising from about 30 to about 80 percent by weight of a matrix polymer composition comprising a polypropylene polymer and optionally including a polyethylene polymer, from about 20 to about 40 weight percent of a mineral filler, wherein said container is pigmented with a black colorant composition consisting essentially iron black iron oxide pigment and a phthalocyanine green pigment, wherein said black iron oxide pigment is present in an amount of up to about 5 weight percent of said container, and wherein the thermoformed disposable food container further comprises from about 2.5 to about 25 weight percent calcium carbonate and from about 20 to about 40 weight percent mica.
Dependencies are inferred from the claim text.