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Packaging material for battery, battery, method for producing the same, and polyester film

A packaging material and polyester film technology, applied in the field of polyester film, can solve the problems of decreased adhesion and delamination between the substrate layer and the barrier layer, and achieve the effect of excellent printing adaptability

Active Publication Date: 2022-07-08
DAI NIPPON PRINTING CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when there is such a printed surface between the base layer and the barrier layer, the adhesion between the base layer and the barrier layer will decrease, and delamination will easily occur between the layers.

Method used

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  • Packaging material for battery, battery, method for producing the same, and polyester film
  • Packaging material for battery, battery, method for producing the same, and polyester film
  • Packaging material for battery, battery, method for producing the same, and polyester film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0256] On a biaxially stretched polyethylene terephthalate film (thickness 25 μm, having the degree of surface orientation in Table 1: Y max / Y min And arithmetic mean roughness Ra), the barrier layer which consists of aluminum foil (JIS H4160:1994A8021H-O, thickness 40 micrometers) which formed the acid-resistant coating film on both sides by dry lamination method was laminated|stacked. Specifically, a two-liquid curable urethane adhesive (polyol compound and aromatic isocyanate compound) was applied to one surface of an aluminum foil, and an adhesive layer (thickness 3 μm) was formed on the aluminum foil on which the acid-resistant coating was formed on both sides. . Next, after laminating the adhesive layer on the aluminum foil and the biaxially stretched polyethylene terephthalate film, and subjecting it to an aging treatment, a substrate layer / adhesive layer / barrier layer was prepared. laminate. In addition, regarding the chemical surface treatment for forming the acid...

Embodiment 2

[0270] On a biaxially stretched polyethylene terephthalate film (thickness 25 μm, having the degree of surface orientation in Table 1: Y max / Y min and arithmetic mean roughness Ra) surface, coated with lubricant (erucamide (coating amount is 6mg / m 2 ) and polyether modified silicone oil (coating weight is 1mg / m 2 )) (coating amount is 7 mg / m in total 2 ), except that, it carried out similarly to Example 1, and obtained the packaging material for batteries.

Embodiment 3

[0272] As a base material layer, a biaxially stretched polyethylene terephthalate film (thickness: 12 μm, having the degree of surface orientation in Table 1: Y) was prepared by laminating it by a dry lamination method. max / Y min and arithmetic mean roughness Ra) and a biaxially stretched nylon film (thickness 15 μm) laminated film. In this laminated film, a polyurethane adhesive using a polyol and an isocyanate curing agent is passed between the biaxially stretched polyethylene terephthalate film and the biaxially stretched nylon film (thickness after curing is 3 μm) bonding. Next, on the side of the biaxially stretched nylon film, an aluminum foil (JIS H4160: 1994A8021H-O, thickness 40 μm) having an acid-resistant coating by applying chemical surface treatment to both sides was laminated by a dry lamination method. barrier layer. Specifically, a two-component polyurethane-based adhesive (polyol compound and aromatic isocyanate compound) was applied to one surface of an a...

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Abstract

The present invention provides a packaging material for batteries, comprising a laminate having at least an outermost surface of a base material layer, a barrier layer and a heat-fusible resin layer in this order, wherein the outermost surface of the base material layer is made of a polyester film Layer structure, using the total reflection method of Fourier transform infrared spectroscopy, when acquiring infrared absorption spectra in 18 directions from 0° to 170° on the surface of the polyester film layer at intervals of 10°, the following formula is satisfied. Child: Y max / Y min < 1.4.

Description

technical field [0001] The present invention relates to a battery packaging material, a battery, a method for producing the same, and a polyester film. Background technique [0002] At present, various types of batteries have been developed, but in all batteries, packaging materials are indispensable components in order to encapsulate battery elements such as electrodes and electrolytes. At present, metal packaging materials are often used as battery packaging bodies. [0003] On the other hand, in recent years, with the performance enhancement of electric vehicles, hybrid electric vehicles, computers, cameras, mobile phones, etc., various shapes are required for batteries, and thinning and weight reduction are required. However, metal battery packaging materials, which are widely used at present, have the disadvantage that it is difficult to cope with the diversification of shapes, and the weight reduction is also limited. [0004] Therefore, in recent years, as a packagi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B32B27/00B32B27/36H01M50/129H01M50/197H01M50/126H01M50/131H01M50/133H01M50/145
CPCH01M50/129H01M50/197B32B27/36B32B27/32B32B15/20B32B15/18B32B15/085B32B15/09B32B7/12B29D7/01B32B2307/75B32B2307/714B32B2307/7246B32B2307/7244B32B2553/00B32B2457/10B32B27/00H01M50/126H01M50/145H01M50/133H01M50/131Y02E60/10B32B27/08C08J5/18C08J2367/02B32B2439/00H01M50/124H01M50/121
Inventor 津森薰安田大佑山下孝典山下力也
Owner DAI NIPPON PRINTING CO LTD