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Vapor-deposited foamed body

a foamed body and vapor-deposited technology, which is applied in the field of vapor-deposited foamed bodies, can solve the problems of reducing the gas-barrier property, the quality of the contents in the container is effectively prevented from being deteriorated, and the gas-barrier property is effectively reduced. , the effect of preventing the quality of the contents in the container

Inactive Publication Date: 2014-12-04
TOYO SEIKAN GRP HLDG LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present invention provides a vapor-deposited foamed body with a film that maintains stability without being peeled off. The vapor-deposited film provides a light-blocking property, prevents deterioration of the quality of the contents in the container, and effectively alleviates a decrease in the gas-barrier property despite foaming. This vapor-deposited foamed body has advantages of small weight and excellent insulation properties.

Problems solved by technology

The foamed plastic formed bodies such as the above foamed bottles are excellent in regard to their small weight and heat-insulating property in addition to light-blocking property accompanied, however, by a problem of a decrease in the gas-barrier property caused by foaming.
In the field of packing such as containers, in particular, a decrease in the gas-barrier property is a serious problem since it permits the contents in the containers to be oxidized and deteriorated due to the permeation of oxygen.
So far, however, nobody has ever attempted to a form vapor-deposited film on the foamed body.
This was because in case a film was vapor-deposited on the foamed body, the film tended to be formed unevenly or tended to be peeled off making it difficult to obtain the gas-barrier property of the vapor-deposited film to a sufficient degree.

Method used

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  • Vapor-deposited foamed body

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0111]A PET resin for bottle containing 0.15% of a nitrogen gas and having an intrinsic viscosity (IV) of 0.84 dL / g was injected into a mold cavity maintaining a pressure therein of 5 MPa by blowing high-pressure air and a temperature of 30° C. and, thereafter, the pressure therein was maintained at 50 MPa for 18 seconds. After another 12 seconds have passed, the mold was opened. There was obtained a preform for container of the shape of a test tube in a substantially unfoamed state in which the gas has been dissolved and having a smooth surface and an overall length of about 110 mm.

[0112]The preform was, further, heated and foamed, and was directly blow-formed to obtain a foamed blow-formed bottle having a thickness in the body portion of about 600 μm and a capacity of about 500 ml. The heating was conducted from both the outer surface side and the inner surface side, and the heating condition was so adjusted that the temperature was 99° C. on the inner surface side of the preform ...

example 2

[0116]A preform was formed, a bottle was formed, and a film was vapor-deposited thereon in the same manner as in Example 1 but so adjusting the heating conditions that the temperature was 102° C. on the inner surface side of the preform of when it was being heated.

[0117]The amount of oxygen that has permeated through the obtained bottle having its inner surface vapor-deposited was as good as 0.004 cc / bottle / day (before the vapor deposition, the amount was 0.06 cc / bottle / day).

[0118]The average porosity was 19% in the inner surface layer portion of the bottle body portion, and was 24% in the outer surface layer portion thereof.

example 3

[0119]A preform was formed, a bottle was formed, and a film was vapor-deposited thereon in the same manner as in Example 1 but so adjusting the heating conditions that the temperature was 104° C. on the inner surface side of the preform of when it was being heated.

[0120]The amount of oxygen that has permeated through the obtained bottle having its inner surface vapor-deposited was as good as 0.007 cc / bottle / day (before the vapor deposition, the amount was 0.07 cc / bottle / day).

[0121]The average porosity was 25% in the inner surface layer portion of the bottle body portion, and was 32% in the outer surface layer portion thereof.

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Abstract

A vapor-deposited foamed body having a film 15 vapor-deposited on the surface of a foamed plastic formed body 10 containing foamed cells 1 therein, wherein in the surface X of the foamed plastic formed body 10 serving as the under-layer on where the film 15 is to be vapor-deposited, the porosity of the foamed cells 1 is suppressed to be not more than 30% in the surface layer portion 10a to a depth of 50μm from said surface. The vapor-deposited foamed body is obtained by vapor-depositing the film on the surface of the foamed plastic formed body such as a foamed container, the vapor-deposited film being uniformly formed and being effectively prevented from peeling off.

Description

TECHNICAL FIELD[0001]This invention relates to a vapor-deposited foamed body obtained by vapor-depositing a film on the surface of a foamed plastic formed body such as a foamed bottle.BACKGROUND ART[0002]Containers made from a polyester as represented by polyethylene terephthalate (PET) excel in such properties as transparency, heat resistance and gas-barrier property, and have been widely used for a variety of applications.[0003]Some contents contained in the packing containers may be subject to be degenerated with light. For example, some kinds of beverages, medicines, cosmetics and the like are, therefore, provided being contained in opaque containers formed by using a resin composition obtained by blending a resin with a coloring agent such as pigment. In recent years, however, there have been proposed a lot of containers imparted with light-blocking property based on foaming. For example, the present applicant has proposed several kinds of foamed bottles having walls foamed by ...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): B65D1/02
CPCB65D1/0215C23C16/045C23C16/26C23C16/402C23C16/511B32B5/18B32B5/22B32B5/32B32B9/00B65D1/40B65D23/02B65D25/34C23C16/22C23C16/50
Inventor KOISO, NOBUHISAICHIKAWA, KENTAROUAIHARA, TAKESHI
Owner TOYO SEIKAN GRP HLDG LTD
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