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Packaging material for battery, method for producing packaging material for battery, and battery

A packaging material and battery technology, which is applied in secondary battery manufacturing, primary battery parts, final product manufacturing, etc. It can solve problems such as poor formability and hard polyester film, and achieve the effect of inhibiting delamination

Active Publication Date: 2019-10-11
DAI NIPPON PRINTING CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, polyester film is harder than polyamide film, and there is a problem of poor formability

Method used

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  • Packaging material for battery, method for producing packaging material for battery, and battery
  • Packaging material for battery, method for producing packaging material for battery, and battery
  • Packaging material for battery, method for producing packaging material for battery, and battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0157]As the base layer, a laminated film obtained by laminating a polyethylene terephthalate film and a nylon film (including MXD6) by coextrusion and biaxially stretching was prepared. The laminated film is blended with UV absorber (60ppm of Tinuvin), light stabilizer (140ppm of Tinuvin770) and antioxidant (130ppm of Irganox1330, 370ppm of Irganox1098, 30ppm of Irganox1010) (at least in polyethylene terephthalate The above-mentioned ultraviolet absorber is contained in the alcohol ester film). In this laminated film, a (biaxially stretched) polyethylene terephthalate film (thickness 5 μm) and a (biaxially stretched) nylon film (thickness 20 μm) pass through a first adhesive layer (thickness 1 μm), the first adhesive layer uses a resin composition containing a modified thermoplastic resin graft-modified with an unsaturated carboxylic acid derivative component. Next, a barrier layer consisting of aluminum foil (JIS H4160: 1994A8021H-O, thickness 40 μm) with acid-resistant coa...

Embodiment 2

[0170] In Example 1, except having used the unstretched polypropylene film (thickness 40 micrometers) instead of the unstretched polypropylene film (thickness 80 micrometers), it carried out similarly to Example 1, and obtained the packaging material for batteries. The substrate layer (laminated film) used in Example 2 is also mixed with an ultraviolet absorber (Tinuvin326 of 60ppm), a light stabilizer (Tinuvin770 of 140ppm) and an antioxidant (Irganox1330 of 130ppm, Irganox1098 of 370ppm, Irganox1010 of 30ppm ) (at least the above-mentioned ultraviolet absorber is contained in the polyethylene terephthalate film). Among them, the aluminum foil used as the barrier layer has an acid-resistant coating containing chromium oxide and phosphate. The analysis of the acid-resistant coating on the barrier layer was carried out in the same manner as in Example 1, using time-of-flight secondary ion mass spectrometry. As a result, Cr was detected from the acid-resistant coating + and PO...

Embodiment 3

[0172] In Example 1, as a barrier layer, stainless steel foil (SUS304, thickness 20 μm) having an acid-resistant film (SUS304, thickness 20 μm) was used on both sides by chemical surface treatment (the same chemical surface treatment as in Example 1), and an unstretched foil was used. A random polypropylene film (thickness 23 μm) was substituted for the unstretched random polypropylene film (thickness 80 μm), and a battery packaging material was obtained in the same manner as in Example 1. Table 1 shows the layer structure of the battery packaging material.

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Abstract

The present invention provides a technology capable of effectively suppressing the delamination of the base material layer of a battery packaging material having at least a polyester film layer and a polyamide film layer in a hot and humid environment. The battery packaging material is composed of a laminate comprising at least a substrate layer, an adhesive layer, a barrier layer, and a heat-sealable resin layer in this order, and the substrate layer has a second layer between the polyester film layer and the polyamide film layer. An adhesive layer, wherein the base material layer contains an ultraviolet absorber.

Description

technical field [0001] The present invention relates to a battery packaging material, a method for producing the battery packaging material, and a battery. Background technique [0002] Various types of batteries have been developed, and in all batteries, packaging materials are indispensable components for packaging battery components such as electrodes and electrolytes. Conventionally, metal packaging materials are often used as packaging for batteries. [0003] On the other hand, in recent years, with the improvement in performance of electric vehicles, hybrid electric vehicles, computers, cameras, mobile phones, etc., batteries have been required to have various shapes, and thinner and lighter weights have also been demanded. However, the metal packaging materials for batteries commonly used in the prior art have the disadvantages that it is difficult to adapt to the diversification of shapes, and there are also limitations in weight reduction. [0004] Therefore, in r...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M2/02B32B27/34B32B27/36H01G11/78H01M6/02H01M10/04H01M50/105
CPCH01M6/02H01M10/04B32B27/34B32B27/36H01G11/78Y02P70/50H01M50/105
Inventor 津森薰山下力也山下孝典
Owner DAI NIPPON PRINTING CO LTD
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