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Battery packaging material, battery, method for manufacturing battery packaging material and battery, and polyester film

A technology for packaging materials and polyester films, applied in the field of polyester films, can solve problems such as decreased adhesion between the substrate layer and the barrier layer, delamination, etc.

Active Publication Date: 2020-07-17
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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  • Battery packaging material, battery, method for manufacturing battery packaging material and battery, and polyester film
  • Battery packaging material, battery, method for manufacturing battery packaging material and battery, and polyester film
  • Battery packaging material, battery, method for manufacturing battery packaging material and battery, and polyester film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0256] On a biaxially stretched polyethylene terephthalate film (thickness 25 μm, having a surface orientation degree of Table 1: Y max / Y min and arithmetic average roughness Ra), a barrier layer composed of aluminum foil (JIS H4160: 1994A8021H-O, thickness 40 μm) with acid-resistant coatings formed on both sides was laminated by dry lamination. Specifically, a two-component curing polyurethane adhesive (polyol compound and aromatic isocyanate compound) is applied to one surface of the aluminum foil, and an adhesive layer (thickness 3 μm) is formed on the aluminum foil with an acid-resistant coating formed on both sides. . Next, the adhesive layer on the aluminum foil and the biaxially stretched polyethylene terephthalate film are laminated, and then subjected to aging treatment to produce a substrate layer / adhesive layer / barrier layer. laminated body. In addition, regarding the chemical surface treatment for forming the acid-resistant coating of aluminum foil used as a ba...

Embodiment 2

[0270] On a biaxially stretched polyethylene terephthalate film (thickness 25 μm, having the surface orientation degree of 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 amount of 1mg / m 2 )) (coating amount is 7mg / m in total 2 ), except that, operate in the same manner as in Example 1 to obtain a battery packaging material.

Embodiment 3

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

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Abstract

The present invention provides a battery packaging material formed of a laminated body including at least a base material layer located on the outermost surface, a barrier layer, and a heat-sealing resin layer in that order. The outermost surface of the base material layer is formed of a polyester film layer and satisfies the following expression when infrared absorption spectra of the surface ofthe polyester film layer are acquired in 18 directions in 10-degree increments from 0 degree to 170 degrees by using the total reflection method of Fourier transform infrared spectroscopy: Ymax / Ymin <1.4.

Description

technical field [0001] The present invention relates to battery packaging materials, batteries, their production methods, and polyester films. Background technique [0002] Currently, various types of batteries have been developed, but in all batteries, packaging materials are indispensable components in order to package battery elements such as electrodes and electrolytes. Currently, metal packaging materials are often used as battery packaging bodies. [0003] On the other hand, in recent years, as the performance of electric vehicles, hybrid electric vehicles, computers, cameras, mobile phones, etc. has increased, batteries have been required to have various shapes, and thinner and lighter weights have also been demanded. However, metal packaging materials for batteries, which are widely used at present, have the disadvantages that it is difficult to cope with the diversification of shapes, and the weight reduction is also limited. [0004] Therefore, in recent years, a...

Claims

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Application Information

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IPC IPC(8): H01M2/02B32B27/00B32B27/36H01M50/126H01M50/131H01M50/133H01M50/145
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
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