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Laminated film and package

A technology for laminating films and packaging bodies, applied in packaging, wrapping paper, household packaging, etc., can solve the problems of intrusion into plastic containers, poor oxygen barrier properties, residual plastic containers, etc., and achieve the effect of excellent oxygen absorption

Inactive Publication Date: 2013-03-27
SUMITOMO BAKELITE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When using this plastic container for food and drink, oxygen may remain inside the plastic container
In addition, plastic containers have poor oxygen barrier properties compared to metal containers and glass containers
Therefore, oxygen easily invades the inside of the plastic container from the outside

Method used

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  • Laminated film and package
  • Laminated film and package
  • Laminated film and package

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1）

[0112]

[0113] Copolyester resin (manufactured by Eastman Chemical Japan Co., Ltd., model number: GN071) was prepared as the resin constituting the outer layer 110 . An adhesive polyolefin-based resin (manufactured by Mitsui Chemicals, Inc., model number: SF740) was prepared as the resin constituting the first adhesive layer 120 . As a resin constituting the barrier layer 130 , EVOH resin (manufactured by Kuraray Co., Ltd., model: J171B) was prepared. An adhesive polyolefin-based resin (manufactured by Mitsui Chemicals, Inc., model number: LF308) was prepared as the resin constituting the second adhesive layer 140 . A mixture of 80% by weight of the base resin and 20% by weight of the unsaturated polyolefin-based oxygen-absorbing resin was prepared as the resin constituting the oxygen-absorbing layer 150 . LDPE resin (manufactured by Ube Maruzen Polyethylene Co., Ltd., model: F522N) was prepared as the resin constituting the sealing layer 160 .

[0114] Cobalt stearate as...

Embodiment 2）

[0125] A hindered phenolic antioxidant (manufactured by BASF, model number: IRGANOX1010) was added to the LDPE resin of the sealing layer 160 so that the content rate was 400 ppm by weight relative to the two layers (second adhesive layer 140 and sealing layer 160 ). , except that, the packaging body 200 was produced in the same manner as in Example 1, and the oxygen absorption amounts of the packaging body 200 on the first, third, and seventh days were measured in the same manner as in Example 1, respectively.

[0126] As a result, the oxygen absorption amount on the first day was 0.020cc / cm 2 , the oxygen absorption on the third day was 0.034cc / cm 2 , the oxygen absorption on the 7th day was 0.071cc / cm 2 (Refer to Table 1 below).

Embodiment 3）

[0128] A hindered phenolic resist is added to the adhesive polyolefin resin of the second adhesive layer 140 so that the content rate relative to the two layers (the second adhesive layer 140 and the sealing layer 160) is 400 ppm by weight. An oxidizing agent (manufactured by BASF, model number: IRGANOX1010) was used to prepare a package 200 in the same manner as in Example 1, and to measure the oxygen absorption of the package 200 on the first, third, and seventh days in the same manner as in Example 1.

[0129] As a result, the oxygen absorption amount on the first day was 0.019cc / cm 2 , the oxygen absorption on the third day was 0.036cc / cm 2 , the oxygen absorption on the 7th day was 0.067cc / cm 2 (Refer to Table 1 below).

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Abstract

Provided is a laminated film with excellent oxygen absorbing ability. The laminated film (100) is provided with an oxygen-absorbing layer (150), a first adjacent layer (140), and a second adjacent layer (160). The oxygen-absorbing layer (150) contains an oxygen absorber and an oxygen absorption reaction catalyst. The first adjacent layer (140) is laminated in contact with one of the surfaces of the oxygen-absorbing layer (150). The second adjacent layer (160) is laminated in contact with the other surface of the oxygen-absorbing layer (150). The content of the oxygen absorption reaction catalyst is between 100 ppm and 5000 ppm in terms of the weight ratio with respect to the oxygen-absorbing layer (150). The total content of an oxidation inhibitor of the first adjacent layer (140) and an oxidation inhibitor of the second adjacent layer (160) is 800 ppm or less in terms of the weight ratio with respect to the total amount of the two abovementioned layers (the first adjacent layer (140) and the second adjacent layer (160)).

Description

technical field [0001] The present invention relates to a laminated film and a package. Background technique [0002] Conventionally, plastic containers have been used as packaging containers for storing foods, drinks, and the like. When food, drink, etc. are contained in this plastic container, oxygen may remain inside the plastic container. In addition, plastic containers are inferior in oxygen barrier properties compared to metal containers and glass containers. Therefore, oxygen easily penetrates into the inside of the plastic container from the outside. Oxygen inside the plastic container oxidizes and degrades food and drink contained therein. [0003] Regarding the problems caused by oxygen inside the plastic container, for example, Patent Document 1 discloses an oxygen-absorbing multilayer body comprising an oxygen-absorbing layer containing an oxygen-absorbing resin and not containing an oxygen-absorbing reaction catalyst, The layer adjacent to the oxygen absorbi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B27/18B65D65/40B65D81/26
CPCB32B27/18B65D81/2076B65D81/24B65D81/26B32B2439/70B32B2307/724B65D65/40B32B7/12B32B27/08B32B27/32B32B2307/518B32B2307/7244B32B2307/74Y10T428/31725Y10T428/31786Y10T428/31938
Inventor 丸茂刚佐佐木研太
Owner SUMITOMO BAKELITE CO LTD
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