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EVOH (ethylene-vinyl alcohol copolymer) high-barrier container and preparation method thereof

A high-barrier, container technology, applied in chemical instruments and methods, containers, rigid containers, etc., can solve the problems of unsatisfactory barrier effect, inability to meet barrier requirements, and high cost, delaying oxidative deterioration, prolonging product shelf life, low cost effect

Pending Publication Date: 2019-04-26
上海珂明注塑系统科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide an EVOH high-barrier container to solve the technical problems in the prior art that the barrier effect is not ideal or the cost caused by the production of barrier materials is too high and cannot meet the barrier requirements of people in daily life

Method used

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  • EVOH (ethylene-vinyl alcohol copolymer) high-barrier container and preparation method thereof
  • EVOH (ethylene-vinyl alcohol copolymer) high-barrier container and preparation method thereof
  • EVOH (ethylene-vinyl alcohol copolymer) high-barrier container and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] S1: The method of sticking EVOH barrier layer on the bottom of the inner wall of the mold: such as figure 1 and figure 2 As shown, the container with EVOH (2) barrier layer attached to the bottom of the inner wall of the mold provided by the present invention: the EVOH (2) material is prepared first, and placed on the bottom of the inner wall of the mold in advance, usually by vacuum or other special positioning devices. Keep the barrier paper layer (3) in place in the mold; put the mold upside down, feed glue from the bottom of the outside of the mold, close the movable mold and the fixed mold of the mold, open the first hot runner, and melt through the first hot runner The pp(1) material is injected into the mold cavity from the injection direction of the mold, and the heat of the melted pp(1) is used to make the EVOH(2) material melt into the melted pp(1); at this time, the molded container is completed shape.

[0032] The method of sticking EVOH barrier layer on ...

Embodiment 2

[0035] The fill barrier method at the bottom of the container: eg Figure 5 and Figure 6 As shown, the movable mold and the fixed mold of the mold are closed, the first hot runner is opened, and the molten pp1 material is injected into the cavity of the mold from the injection direction of the arrow on the figure through the first hot runner, and then the first hot runner is turned off , when the injected pp1 layer is not yet formed, open the second hot runner and inject barrier material EVOH2 into the unformed pp1 layer until the preset value is reached or the pp1 layer at the bottom of the container is covered with EVOH2 Material, the EVOH2 material forms an EVOH2 barrier layer in the pp1 layer at the bottom, closes the second hot runner; then fills a small amount of pp1 seal at the entrance of the injection direction of the arrow on the figure, and then sticks barrier paper on the outside of the container wall To achieve the outer perimeter barrier effect.

[0036]Furthe...

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Abstract

The invention discloses an EVOH (ethylene-vinyl alcohol copolymer) high-barrier container. The EVOH high-barrier container comprises a pp (polypropylene) layer and a barrier label paper layer, whereinthe pp layer is used as a raw material of the container; the barrier label paper layer is seamlessly stuck to an outer side wall of the pp layer; the barrier label paper layer comprises an EVOH material and a printing layer; one side of the EVOH material is seamlessly stuck to the printing layer; and the other side of the EVOH material is seamlessly stuck to the outer side wall of the pp layer. According to the EVOH high-barrier container, EVOH is used as a filling layer and the barrier label paper layer and the sealing performance is good; and especially, when the EVOH high-barrier containeris used for packaging liquid and powdery products, a sealing part is not polluted so that the sealing performance of packaging is ensured. The EVOH high-barrier container is integrally molded throughinjection molding, low in cost and high in barrier performance, so that the EVOH high-barrier container can be used for delaying an oxidative deterioration phenomenon of foods; meanwhile, a conditionthat the aroma of contents in the container can be prevented from being lost and external bad odor is prevented from being invaded; the gas barrier property is not changed along the changes of the humidity, and products do not go bad at a high-humidity environment; and phenomena that the products are dehydrated to become dry and the mouthfeel becomes bad can be prevented.

Description

technical field [0001] The invention relates to a barrier container, in particular to a container used for containing food, medicine and chemical products. Background technique [0002] With the improvement of people's quality of life, the requirements for product storage or packaging, especially food storage or packaging, are constantly increasing. In order to preserve the quality, freshness, flavor and shelf life of food, people have developed high-barrier packaging materials. Contents of the invention [0003] The purpose of the present invention is to provide an EVOH high-barrier container to solve the technical problems in the prior art that the barrier effect is not ideal or the cost caused by making the barrier material is too high and cannot meet the barrier requirements of people in daily life. [0004] In order to achieve the above-mentioned technical purpose, the present invention provides a kind of EVOH high barrier container, comprises container body, and desc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B65D25/00B32B27/32B32B27/10B32B29/00B29C45/16B29C45/14
CPCB65D25/00B29C45/14065B29C45/16B32B27/10B32B27/32B32B29/002B29C2045/14155
Inventor 王兴东
Owner 上海珂明注塑系统科技有限公司