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Method for producing a barrier container

A barrier and container technology, applied in the field of preparing containers with excellent barrier properties, can solve the problems of unfavorable swelling of fuel, poor processability, etc., and achieve the effect of excellent barrier properties and high joint strength

Inactive Publication Date: 2012-08-29
SUMITOMO CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the fuel container disclosed in U.S. Patent No. 6,033,749 has the following problems: Since the innermost layer of the fuel container is a layer of high-density polyethylene, this layer is unfavorably swollen by the fuel in the container
As mentioned above, the conventional technique may be poor in workability because in order to completely cover the inner surface with the barrier material without applying the barrier material to the part to be heat-sealed, it should be applied carefully Barrier material

Method used

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  • Method for producing a barrier container
  • Method for producing a barrier container
  • Method for producing a barrier container

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0088] A 50 μm thick non-oriented polypropylene (CPP) film (trade name: PYLEN FILM P1111, manufactured by Toyobo Co., Ltd.), one surface of which was subjected to corona treatment, was used as a primary web for the container member. Using a test coater (manufactured by Yasui Seiki Co., Ltd.), corona was applied to the primary web of the container part by the micro gravure coating method (gravure line number: #150 (#: GM)) at a coating speed of 3 m / min. The surface is treated, and the coating liquid (1) is gravure coated. Drying of the coated web at 100°C resulted in a container part primary web (1') having a film on one side thereof. The thickness of this film was 2.0 μm, and the Na concentration in the film was 7,000 ppm. Two pieces taken from the primary web (1') of the container part are joined by heat sealing while overlapping them with their films kept in contact. Said article corresponds to the container part in the present invention. At a temperature of 150°C, 1kg / cm...

Embodiment 2

[0090] A laminate ( 2 ) was obtained in the same manner as above except that the coating liquid ( 2 ) was used instead of the coating liquid ( 1 ). Then, the bonding strength of the laminated body (2) was measured. The results are shown in Table 1.

Embodiment 3

[0092] A laminate (3) was obtained in the same manner as in Example 2 except that moist heat was not performed. Then, the bonding strength of the laminate (3) was measured. The results are shown in Table 1.

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Abstract

There is provided a method for producing a barrier container having a barrier layer which constitutes the inner surface of the container by joining container parts, the method having step (1) of producing container parts from a thermoplastic resin, the container parts each having an inner surface, step (2) of applying a coating liquid containing a liquid medium and a polymer component (A) having hydroxyl groups and carboxyl groups with a ratio of the number of the hydroxyl groups to the number of the carboxyl groups of from 30:70 to 95:5 to the inner surfaces of the container parts produced in step (1), thereby forming a film on the inner surfaces, step (3) of joining the container parts having the film to form a primary container, and step (4) of dry heating the primary container to obtain a dry heated container having a barrier layer.

Description

technical field [0001] The present invention relates to a process for the preparation of containers having excellent barrier properties. Background technique [0002] Heretofore, containers having excellent barrier properties have been used for containers for food packaging, beverage packaging, medical product packaging, and the like. Barrier containers made of thermoplastic resins are widely used as fuel containers in the automotive field due to their excellence in rust prevention, light-weight properties, formability, design flexibility, and the like. Examples of commonly used barrier fuel containers made of resin include multilayer containers comprising layers of high density polyethylene and a barrier layer made of ethylene-vinyl alcohol copolymer. U.S. Patent 6,033,749 discloses a fuel container having improved gasoline barrier properties, especially oxygen-containing gasoline, which is a multilayer container comprising layers of high density polyethylene, adhesive A ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29C69/00B29C73/02B29C65/00
Inventor 大崎伸浩南部仁成
Owner SUMITOMO CHEM CO LTD