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Novel lithium ion battery aluminum plastic soft packaging film

A flexible packaging film, aluminum-plastic technology, applied in the direction of secondary batteries, battery pack parts, circuits, etc., can solve the problems that the heat-resistant resin layer cannot be directly applied, the molecular weight is low, and the coating cannot meet the stamping and forming requirements, etc., and achieve good Chemical resistance, simple preparation process, and the effect of preventing embrittlement of aluminum foil

Active Publication Date: 2017-09-05
乐凯胶片股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the aluminum-plastic packaging film needs to be stamped and formed during use. The current commercially available polyurethane acrylic UV-curable coating has a low molecular weight, generally around 1000, and the formed coating cannot meet the stamping and forming requirements, and cannot be directly applied to the aluminum-plastic film. thermal resin layer

Method used

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  • Novel lithium ion battery aluminum plastic soft packaging film
  • Novel lithium ion battery aluminum plastic soft packaging film
  • Novel lithium ion battery aluminum plastic soft packaging film

Examples

Experimental program
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preparation example Construction

[0039] The preparation method of polyurethane acrylic acid UV curing coating;

[0040] According to the formula, the polyurethane acrylic acid prepolymer, active monomer, photoinitiator and auxiliary agent are added into the reactor and stirred evenly to prepare the polyurethane acrylic acid UV-curable coating.

[0041] Preparation method of aluminum-plastic flexible packaging film

[0042] The prepared polyurethane acrylic UV-curable coating is coated on the matt surface of the aluminum foil layer by conventional methods such as scraping or spraying, and the coating is cured by UV light; then the passive film layer of the aluminum foil and the thermoplastic resin layer are passed through the glue The adhesive is dry compounded to obtain an aluminum-plastic flexible packaging film for lithium-ion batteries.

Embodiment 1

[0045] The components of polyurethane acrylic UV-curable coatings are:

[0046]

[0047] Preparation of aluminum-plastic flexible packaging film:

[0048] Coat 100 μm of the above-mentioned polyurethane acrylic UV-curable coating on a 35 μm aluminum foil (matt surface), irradiate and cure under a mercury arc of 1000 W, etc., and then dry compound the 100 μm single-layer cast polypropylene through an adhesive On the surface of the organic passivation film layer (with a thickness of 1 μm) of the aluminum foil, an aluminum-plastic soft packaging film for the lithium ion battery is obtained.

Embodiment 2

[0050] The components of polyurethane acrylic UV-curable coatings are:

[0051]

[0052] Preparation of aluminum-plastic flexible packaging film:

[0053] Coat 80 μm of the above-mentioned polyurethane acrylic UV-curable coating on a 55 μm aluminum foil (matte surface). compound on the surface of the inorganic passivation film layer (thickness is 1 μm) of the aluminum foil to obtain the aluminum-plastic flexible packaging film for the lithium-ion battery.

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Abstract

The invention relates to a novel lithium ion battery aluminum plastic soft packaging film which is sequentially provided with a heat-tolerant protection layer, an aluminum foil layer, an adhesive glue layer and a thermoplastic resin film layer from outside to inside. Polyurethane-acrylate ultraviolet curing paint is cured through ultraviolet light to form a coating which is provided with the heat-tolerant protection layer, the polyurethane-acrylate ultraviolet curing paint comprises, in weight percentage, 60wt%-75wt% of polyurethane-acrylate pre-polymers, 20wt%-35wt% of active monomers, 3wt%-5wt% of photo-initiators and 0.1wt%-1.0wt% of additives. A heat-tolerant resin layer of the aluminum plastic soft packaging film is a polyurethane-acrylate resin layer cured by the ultraviolet light, the aluminum foil layer is directly coated with the heat-tolerant resin layer, use of the adhesive glue layer is decreased, and an interlayer structure of the aluminum plastic soft packaging film is simpler.

Description

technical field [0001] The invention belongs to the technical field of lithium-ion battery packaging, and in particular relates to an aluminum-plastic flexible packaging film for lithium-ion batteries. Background technique [0002] At present, the aluminum-plastic flexible packaging film used in lithium-ion batteries usually consists of a heat-resistant resin layer, an adhesive layer, an aluminum foil layer, an aluminum foil passivation film layer, an adhesive layer or an adhesive resin layer, and a thermoplastic resin film layer (heat-sealing layer). )constitute. The heat-resistant resin layer of the outer layer is usually bonded and compounded to the aluminum foil layer by an adhesive, which mainly plays a decorative role and also protects the aluminum foil layer, ensuring that the aluminum foil layer is not easy to break after cold stamping, and at the same time ensures that it is waterproof, Moisture-proof and puncture-resistant performance. The heat-resistant resin la...

Claims

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Application Information

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IPC IPC(8): H01M2/02H01M10/0525
CPCH01M10/0525H01M50/124Y02E60/10
Inventor 马亚男徐孟进张学建宋建龙王小记
Owner 乐凯胶片股份有限公司
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