Frosted container
AssigneeToyo Seikan Kaisha, Ltd.
InventorsKozaburo Sakano, Yuji Yamaguchi, Toshiyuki Iwamoto
Life of this patent
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Abstract
At least an outer layer of a plastic container is formed of a blend including an ethylene-propylene block copolymer containing 3 to 10% by weight, particularly 5 to 9% by weight of ethylene and a melt flow rate of 0.8 to 10 g/10 min. and a polyethylene having a given density at a weight ratio of 9:1 to 5:5. A plastic container made of an olefin resin having a frosted or matted appearance can be manufactured with excellent moldability without requiring any special working such as sand blasting the cavity surface of a mold. The container will gives an impression of shade off, depth and high grade.
Claims10
A plastic container having a frosted appearance comprising at least an outer layer which is formed of a blend comprising (A) and ethylene-propylene block copolymer containing 3 to 10% by weight of ethylene and having a melt flow rate of 0.8 to 10 g/10 min. and (B) polyethylene having a density of 0.925 to 0.970 g/cm.sup.3, at a weight ratio (a):(B) of 9:1 to 5:5.
A plastic container having a frosted appearance, comprising a laminate comprising (i) an outer layer which is formed of a blend of (A) an ethylene-propylene block copolymer containing 3 to 10% by weight of ethylene and having a melt flow rate of 0.8 to 10 g/10 min. and (B) a polyethylene having a density of 0.925 to 0.970 b/cm.sup.3 at a blend weight ratio (A):(B) of 9:1 to 5:5 and (ii) an inner layer which is formed of an ethylene-propylene random copolymer containing 1 to 85 by weight of ethylene and a melt flow rate of 1 to 5 g/10 min.
A plastic bottle having a frosted appearance comprising an outer layer of a blend comprising (A) an ethylene-propylene block copolymer containing 3 to 10% by weight of ethylene and having a melt flow rate of 0.8 to 10 g/10 min. and (B) a polyethylene having a density of 0.925 to 0.975 g/cm.sup.3 at a weight ratio (A):(B) of 9:1 to 5:5, and an inner layer of an ethylene-propylene random copolymer containing 1 to 8% by weight by ethylene and a melt flow rate of 1 t 5 g/10 min., said outer layer occupying at least 3% of the thickness of the wall of the bottle.
Dependencies are inferred from the claim text.