Thermoformed polyolefin cup
AssigneeIdemitsu Petrochemical Co., Ltd.
InventorsSenji Miyazaki, Osamu Touya
Life of this patent
Estimating the term…
Abstract
The present invention relates to a cup which is produced by thermoforming a polyolefin resin composition sheet wherein the polyolefin resin composition comprises from 30 to 80% by weight of a polyolefin resin, from 19 to 69% by weight of talc, and from 1 to 10% by weight of titanium oxide, and also by thermoforming of a laminated sheet comprising (A) a layer of the above described polyolefin resin composition and (B) a layer of a polyolefin resin composition containing from 0 to 10% by weight of an inorganic filler. The cup is of high whiteness, and has a high quality paper-like appearance of reduced luster and transparency impression, and is high in strength, stiffness, stability, and so forth.
Claims20
A cup produced by thermoforming of a polyolefin resin composition sheet, wherein said polyolefin resin is a mixture of polypropylene resin and high density polyethylene resin in a weight ratio of from 9:1 to 1:9, wherein said polyolefin resin composition comprises from 30 to 80% by weight of a polyolefin resin, from 19 to 69% by weight of talc, and from 1 to 10% by weight of titanium dioxide, wherein the ratio of height to average diameter as average edge length is 1.1:1 to 2.0:1.
A cup produced by thermoforming a laminated sheet comprising (A) a layer of a polyolefin resin composition comprising from 30 to 80% by weight of a polyolefin resin, from 19 to 69% by weight of talc, and from 1 to 10% by weight of titanium oxide, and (B) a layer of a polyolefin resin composition containing from 0 to 10% by weight of an inorganic filler;
- said polyolefin resin in each of layers (A) and (B) is a mixture of polypropylene resin and high density polyethylene resin in a weight ratio of From 9:1 to 1:9.
A cup produced by thermoforming a laminated sheet comprising an intermediate layer (A) of a polyolefin resin composition comprising from 30 to 80% by weight of a polyolefin resin, from 19 to 69% by weight of talc, and from 1 to 10% by weight of titanium oxide, an inner layer (B) and an outer layer (C) each layer (B) and (C) being of a polyolefin resin composition containing from 0 to 10% by weight of an inorganic filler;
- said polyolefin resin in each of layers (A), (B) and (C) is a mixture of polypropylene resin and high density polyethylene resin in a weight ratio of from 9:1 to 1:9.
Dependencies are inferred from the claim text.