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Preparation method of flexible packaging film

A technology of flexible packaging film and resin film, which is applied in the field of preparation of flexible packaging film, can solve the problems of biological and environmental hazards, limited improvement effect, and affect the performance of resin film, achieve excellent compactness, improve interlayer stability, and good physical properties Barrier effect

Active Publication Date: 2021-09-07
FSPG HI TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Although the process of chemical oxidation treatment of chromium is simple and low in cost, the chemical layer formed on the surface has certain corrosion resistance and has good bonding force with the resin film, but chromate contains hexavalent chromium, and hexavalent chromium is carcinogenic. Moreover, the aerosol generated in the oxidation treatment process and the waste water in the production have serious harm to the organism and the environment; and simply modifying the resin film with additives has a great effect on improving the bonding force between the organic resin and the inorganic metal foil. The improvement effect is also extremely limited, and the addition of a large amount of modifying additives will also affect the performance of the resin film and the durability of the compound with the technology

Method used

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  • Preparation method of flexible packaging film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A preparation method for a flexible packaging film, comprising the steps of:

[0031] (1) Surface treatment of aluminum alloy foil

[0032] Select soft-end aluminum-magnesium alloy foil for flexible packaging batteries, grade 8011, bright on one side, thickness 40 μm, elongation at break 22%; use German Henkel aluminum alloy acid degreasing agent Ridoline 560, formulated with a mass solubility of 5 % aqueous solution; the specific technological process of the surface treatment of aluminum alloy foil is as follows: soak the aluminum alloy foil in the degreasing agent solution at a temperature of 40°C for 30s, take out the cold water to spray and clean it, and dry it under hot air at a temperature of 100°C. Then after natural cooling, stand-by;

[0033] (2) Preparation of silane solution

[0034] Select gamma-aminopropyltriethoxysilane coupling agent (KH-550), and mix it with ethanol and deionized water in a mass ratio of 1:12:1 to prepare a mixed solution; select glaci...

Embodiment 2

[0047] The specific steps are as in Example 1, the difference is that glycidyl etheroxypropyltrimethoxysilane (KH-560), bis(3-triethoxysilylpropyl)amine (KH270 ) Two silane coupling agents, the ratio is 1:0.2. Methanol and ethanol are mixed in any proportion to obtain an alcohol mixture, and then silane, alcohol mixture, and deionized water are mixed in a mass ratio of 1:10:1. Then dilute it with deionized water to form a silane solution with a mass solubility of 5%. Graphene oxide powder LGO1111 from Changzhou Angxing Company was selected, with a single-layer sheet diameter of 5-40nm, an average thickness of 1nm, and an exfoliation rate of >95%.

[0048] The same performance characterization test was carried out as in Example 1, and the test results are shown in Table 1.

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Abstract

This technical solution discloses a method for preparing a flexible packaging film. By directly coating a graphene-silane coating on the surface of an aluminum alloy foil, the coating formed by combining graphene with silane has excellent film-forming properties, mechanical properties and corrosion resistance. , and there are both organophilic and inorganic functional groups in the silane molecule, which can firmly combine the two materials with very different properties, organic materials and inorganic materials; thus effectively improving the corrosion resistance of the packaging film property, interlayer composite stability, etc.; and the preparation method described in this technical solution is to directly carry out graphene-silane coating coating on the aluminum alloy foil, without any passivation treatment on the aluminum alloy foil, so as to avoid When the aluminum alloy foil is passivated, the pollution caused to the environment, and the aluminum alloy foil is directly coated with graphene-silane coating, which saves the process and production time, and greatly improves the production efficiency. efficiency.

Description

technical field [0001] The invention belongs to the field of packaging film composite materials, in particular to a preparation method of a flexible packaging film. Background technique [0002] With the upgrading requirements of high performance, miniaturization, light weight, thinner and safer electronic equipment, new soft package packaging materials are widely used in the field of outer packaging such as batteries, capacitors, chemicals, etc., and due to the strong internal charge Corrosive liquids have extremely high requirements on the interlayer composite stability, chemical corrosion resistance and formability of packaging materials. [0003] Generally, this kind of soft package packaging material is mostly a multi-layer aluminum-plastic composite film material with aluminum alloy foil as the core layer and resin films on both sides. In order to obtain the required high formability, interlayer adhesion and chemical corrosion resistance In the existing technology, th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B32B37/12B32B38/00B32B38/16B65D65/40C09D183/08C09D7/61
CPCB32B37/12B32B38/00B32B38/162B32B38/164B32B2307/714B32B2311/24B32B2323/10B32B2377/00B32B2553/00B65D65/40C09D183/08C09D7/61C08K3/042
Inventor 徐冰吴慧斌谭志清
Owner FSPG HI TECH
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