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AssigneeMitsubishi Polyester Film GmbH
InventorsHerbert Peiffer, Klaus Oberlaender, Gottfried Hilkert, Ursula Murschall
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The present application relates to a white, biaxially oriented, flame-retardant polyester film with at least one base layer which comprises, based on the weight of the base layer, from 2 to 60% by weight of a cycloolefin copolymer (COC), where the glass transition temperature of the COC is within the range from 70 to 270° C. The film also comprises from 0.5 to 30% by weight of flame retardant, based on the weight of the layer comprising the flame retardant. The film of the invention is suitable for packing foods or other consumable items which are sensitive to light and/or to air, or for use in industry, e.g. in the production of hot-stamping foils or as a label film, or for image-recording papers, printed sheets or magnetic recording cards.
A white, biaxially oriented, flame-retardant polyester film comprising at least one polyester layer, wherein at least this layer comprises, based on the weight of this layer, from 4 to 60% by weight of a cycloolefin copolymer (COC), selected from the group consisting of norbornene/ethylene copolymers and tetracyclododecene/ethylene copolymers with an ethylene content of 5 to 80% by weight where the glass transition temperature of the COC is within the range from 110 to 270° C., and wherein the layer comprises at least one organic phosphorus compound as a flame retardant;
A white, biaxially oriented, flame-retardant polyester film comprising at least one polyester layer, which comprises, based on the weight of this layer, from 2 to 60% by weight of COC, selected from the group consisting of norbornene/ethylene copolymers and tetracyclododecene/ethylene copolymers with an ethylene content of 5 to 80% by weight where the opacity of the film is above 60%, wherein the film also comprises an amount within the range from 1 to 20% by weight of a an organic phosphorus flame retardant, based on the weight of the layer comprising the flame retardant, and wherein the glass transition temperature of the COC is within the range from 110 to 270° C.;
A white, biaxially oriented, flame-retardant polyester film comprising at least one polyester layer, which comprises, based on the weight of this layer, from 2 to 60% by weight of COC, selected from the group consisting of norbornene/ethylene copolymers and tetracyclododecene/ethylene copolymers with an ethylene content of 5 to 80% by weight and the whiteness of which is above 70%, wherein the film also comprises an amount within the range from 1 to 20% by weight of a an organic Phosphorus flame retardant, based on the weight of the layer comprising the flame retardant and wherein the glass transition temperature of the COC is within the range from 110 to 270° C.;
A white, biaxially oriented, flame-retardant polyester film comprising at least one polyester layer, which comprises, based on the weight of this layer, from 2 to 60% by weight of COC, selected from the group consisting of norbornene/ethylene copolymers and tetracyclododecene/ethylene copolymers with an ethylene content of 5 to 80% by weight, and the gloss of which is above 80, wherein the film also comprises an amount within the range from 1 to 20% by weight of a an organic phosphorus flame retardant, based on the weight of the layer comprising the flame retardant and wherein the glass transition temperature of the COC is within the range from 110 to 270° C.;
Dependencies are inferred from the claim text.