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Humidity resistance high oxygen barrier packaging film preparation method

A packaging film and high-resistance technology, which is applied in packaging, packaging paper, transportation and packaging, etc., can solve the problems of dependence on imports and lack of independent development capabilities, and achieve energy and resource saving, thin coating thickness and mature technology.

Inactive Publication Date: 2009-12-23
ZHEJIANG CHANCING PACKAGE MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage is that there are many factors that affect the oxygen barrier properties of nylon films
At present, whether it is barrier raw material resin or barrier film production equipment and related process technology, domestic scientific research institutes and enterprises lack independent development capabilities and rely heavily on imports. Most enterprises are actually still in the initial stage of processing. The research, development and production of high-barrier packaging materials cannot meet the rapidly growing demand of the domestic market, and the social and economic benefits of vigorously developing high-barrier packaging materials are very obvious

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] A barrier coating consisting of 10% acrylic and maleic acid copolymer, 2% montmorillonite, 1% hydrotalcite, 60% water, 20% propanol and 7% polyethylene glycol was applied using a dry laminating machine. The cloth liquid is coated on a BOPET substrate with a corona value of 54 dynes and a thickness of 12 microns, and is dried in an oven at 60°C, 70°C, and 80°C in sequence, and finally cured in an oven at 40°C for 12 hours to obtain a moisture-resistant Type high oxygen barrier packaging film. The barrier coating thickness is 3 microns. When the relative humidity of the environment is 80%, the oxygen transmission rate is 2.1-3.4cc / m 2 / day.

Embodiment 2

[0025] A barrier coating consisting of 30% acrylic acid and methyl copolymer, 1.5% montmorillonite, 1% calcium carbonate, 50% ethanol, 10% water and 7.5% methyl etherified amino resin was applied using a dry laminating machine. The cloth liquid is coated on the BOPA substrate with a corona value of 54 dynes and a thickness of 15 microns, and is dried in an oven at 60°C, 70°C, and 80°C in sequence, and finally cured in a 60°C oven for 12 hours to obtain a moisture-resistant Type high oxygen barrier packaging film. The barrier coating thickness is 2 microns. When the relative humidity of the environment is 80%, its oxygen transmission rate is 1.5-2.0cc / m 2 / day.

Embodiment 3

[0027] A barrier coating solution consisting of 15% polyacrylic acid, 1% modified attapulgite clay, 20% butanol, 60% water and 4% polyether polyol glycidyl ether was applied using a coater On a PE substrate with a corona value of 44 dynes and a thickness of 30 microns, it is dried in an oven at 50°C, 60°C, and 70°C in sequence, and finally cured in an oven at 35°C for 12 hours to obtain a moisture-resistant high oxygen resistance Sexual packaging film. The barrier coating thickness is 1.5 microns. When the relative humidity of the environment is 80%, the oxygen transmission rate is 3.0-3.5cc / m 2 / day.

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Abstract

The invention discloses a humidity resistance high oxygen barrier packaging film preparation method, comprising the following steps: coating a barrier coating fluid comprising 5-40% of acrylic homopolymer or copolymer, 0.1-5% of assistant, 0.5-15% of crosslinking agent and 40-94.4% of solvent on the substrate of polyester films of which corona value is 30-60 dynes, nylon films or polyolefin films by using a dry-lamination machine, a wet-lamination machine or an extrusion lamination machine, drying the substrate at 50-110 DEG C, solidifying the dried substrate at 20-150 DEG C and obtaining the humidity resistance high oxygen barrier packaging film. The humidity resistance high oxygen barrier packaging film prepared by the invention can always maintain excellent ability to barrier oxygen, carbon dioxide and nitrogen in high humidity; for instance, the typical oxygen permeance is 3cc / m2 / day in 80% humidity. The film has excellent mechanical properties, can be repeated bended and can not affect the barrier properties.

Description

technical field [0001] The invention relates to the field of functional plastic flexible packaging, in particular to a method for preparing a moisture-resistant high-oxygen barrier packaging film. Background technique [0002] The main function of packaging is to protect goods and make them easy to use and store. In order to prevent food contamination and deterioration, not only is food packaging required to be beautiful and pleasant in appearance, convenient and practical, but more importantly, it is necessary to ensure quality and food safety from the inside. Therefore, in addition to good mechanical properties, such as tensile strength, tear resistance, impact strength, etc., materials used for food packaging must have high barrier properties, especially oxygen barrier packaging materials that are harmful to food. It plays a key role in quality preservation, freshness preservation, flavor preservation and shelf life extension. [0003] With the improvement of people's l...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J7/04C08L67/00C09D133/00B65D65/40B32B27/08
Inventor 宗宇后周海平
Owner ZHEJIANG CHANCING PACKAGE MATERIAL
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