초록 ▼

A multi-layer polyester article, and particularly a beverage bottle having good oxygen and carbon dioxide permeability resistance. At least one layer of the article is made from polyisophthalate and copolymers thereof. The multi-layer articles find particular use as packaging materials, films, and m

A multi-layer polyester article, and particularly a beverage bottle having good oxygen and carbon dioxide permeability resistance. At least one layer of the article is made from polyisophthalate and copolymers thereof. The multi-layer articles find particular use as packaging materials, films, and molded containers such as for alcoholic beverages. Various colorants can be added to either one or more of the layers to impart a desired color to the article.

대표청구항 ▼

A multi-layer packaging material, comprising: (a) at least a layer made from a polyterephthalate compound, said polyterephthalate compound being made by the reaction of a compound selected from the group consisting of terephthalic acid, dimethylphthalate, diethylphthalate, and combinations thereof w

A multi-layer packaging material, comprising: (a) at least a layer made from a polyterephthalate compound, said polyterephthalate compound being made by the reaction of a compound selected from the group consisting of terephthalic acid, dimethylphthalate, diethylphthalate, and combinations thereof with ethylene glycol, wherein said polyterephthalate compound has an intrinsic viscosity of 0.6 dl/g or greater and a glass transition temperature of from about 60°C. to about 100°C.; and (b) at least a layer made from a polyisophthalate compound or copolymers thereof, said polyisophthalate compound made by the reaction of an isophthalic compound selected from the group consisting of isophthalic acid, dimethylisophthalate, and diethylisophthalate with a glycol, wherein said glycol is ethylene glycol which contains from 0 to 35 mole percent of one or more diols selected from the group consisting of cyclohexanedimethylol, tetramethylene glycol, and propylene glycol, said copolymers of said polyisophthalate compound being the reaction product of said isophthalic compound, said glycol, and up to 30 mole percent of a dicarboxylic compound selected from the group consisting of terephthalic acid, a dimer acid having 36 carbon atoms, dimethylterephthalate, azelate, and 2,6-naphthalene dicarboxylate, wherein said polyisophthalate compound has an intrinsic viscosity of 0.5 dl/g or greater, a glass transition temperature of from about 35°C. to about 100°C., an oxygen permeability of 7 ccㆍmil/100 in2ㆍdayㆍatm or less, and a CO2 permeability of 30 ccㆍmil/100 inㆍdayㆍatm or less; wherein the layer made from a polyisophthalate compound has a thickness which ranges from about 10 percent to about 90 percent of the total thickness of the packaging material. A multi-layer packaging material according to claim 19, wherein said packaging material is in the form of a container.