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Laminated body for outer packaging material of power storage device

A technology for electrical storage equipment and outer packaging, applied in lithium batteries, electronic equipment, transportation and packaging, etc., can solve the problems of strict formability and inability to meet, and achieve the effect of improving chemical resistance

Pending Publication Date: 2021-12-03
株式会社乐索纳克包装
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0015] However, in Patent Documents 1 and 2, there is no description about the specific physical properties of the PET film and ONY film of the base layer, and since the base layer is multilayered (two-layer structure), there is a problem that the following situation cannot be achieved. Satisfies stricter moldability (deeper molding height) required to increase battery capacity

Method used

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  • Laminated body for outer packaging material of power storage device
  • Laminated body for outer packaging material of power storage device
  • Laminated body for outer packaging material of power storage device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0128] On both sides of an aluminum foil (barrier layer 3) with a thickness of 40 μm, a chemical conversion treatment liquid composed of polyacrylic acid, a trivalent chromium compound, water, and alcohol was applied and dried at 180° C. 10mg / m 2 . In addition, as the aluminum foil, A8021-O material (JIS H4160 (2006)) was used.

[0129] Furthermore, a two-component curing polyurethane adhesive (second adhesive layer 6) with a thickness of 4 μm was applied by dry lamination on one surface of the aluminum foil, and stretched nylon with a thickness of 15 μm was attached. Membrane (polyamide membrane layer 22).

[0130] Furthermore, a polyester polyurethane-based adhesive (adhesive layer 5 between substrates) with a thickness of 4 μm was applied on the surface of the stretched nylon film by dry lamination, and a stretched nylon film with a thickness of 12 μm was attached. Polyethylene terephthalate (PET) film (polyester film layer 21).

[0131] Furthermore, heat aging treatmen...

Embodiment 2

[0138] As a stretched polyethylene terephthalate (PET) film, the following film is used: the tensile breaking strength of MD is 280 MPa, the tensile breaking strength of TD is 276 MPa, that is, the sum of the two is 556 MPa, and the tensile breaking strength of TD is 556 MPa. The ratio of the tensile strength at break to the tensile strength at break in MD was 0.99, the tensile elongation at break in MD was 171%, and the tensile elongation at break in TD was 158%.

[0139] As the stretched nylon film, the following film is used: the tensile breaking strength of MD is 280MPa, the tensile breaking strength of TD is 322MPa, that is, the sum of the two is 602MPa, the tensile elongation at break of MD is 140%, and the tensile breaking strength of TD is 140%. The tensile elongation at break was 120%, the hot water shrinkage of MD was 3.6%, and the hot water shrinkage of TD was 4.2%.

[0140] Except having used the above-mentioned material, it carried out similarly to Example 1, and ...

Embodiment 3

[0142]As a stretched polyethylene terephthalate (PET) film, the following film is used: the tensile breaking strength of MD is 271 MPa, the tensile breaking strength of TD is 254 MPa, that is, the sum of the two is 525 MPa, and the tensile breaking strength of TD is 525 MPa. The ratio of the tensile strength at break to the tensile strength at break in MD was 0.94, the tensile elongation at break in MD was 155%, and the tensile elongation at break in TD was 151%.

[0143] As the stretched nylon film, the following film is used: the tensile breaking strength of MD is 276MPa, the tensile breaking strength of TD is 320MPa, that is, the sum of the two is 596MPa, the tensile elongation at break of MD is 120%, and the tensile breaking strength of TD is 120%. The tensile elongation at break was 110%, the hot water shrinkage of MD was 3.4%, and the hot water shrinkage of TD was 4.2%.

[0144] Except having used the said material, it carried out similarly to Example 1, and produced the...

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Abstract

The present invention relates to a laminated body for an outer packaging material of a power storage device, and provides the laminated body for the outer packaging material of the power storage device capable of obtaining sufficient moldability. The laminated body includes a barrier layer 3 made of metal, a base material layer 2 made of a heat-resistant resin laminated on an outer side surface of the barrier layer 3, and a sealant layer 4 made of a heat sealable resin laminated to an inner side surface of the barrier layer 3. The base material layer 2 includes a polyester film layer 21 as an outer layer and a polyamide film layer 22 as an inner layer. The polyester film layer is 500 MPa to 600 MPa in a sum of breaking strength in an MD and breaking strength in a TD, 0.8 to 1.1 in a ratio of the breaking strength in the TD to the breaking strength in the MD, and 110% to 200% in breaking elongation in the MD and breaking elongation in the TD. The MD denotes a machine flow direction, and the TD denotes a direction perpendicular to the MD.

Description

technical field [0001] The present invention relates to a laminate for an electrical storage device exterior material comprising a laminate in which a resin layer is laminated on a metal layer. Background technique [0002] Conventionally, metal packaging materials processed into cylindrical or square shapes have been often used as battery packaging materials for storing batteries. In addition, in recent years, batteries have been used in various places as a diversified energy supply source and as a kind of energy storage, and weight reduction and space saving are also required. [0003] As one of the countermeasures, a metal-resin laminate sheet (hereinafter referred to as a laminate) in which resin films are laminated on both sides of a metal foil is used as a battery packaging material. Matching deep-drawing to provide maximum battery capacity in a limited space. [0004] Since batteries using this laminate have excellent corrosion resistance and sealing properties, the...

Claims

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Application Information

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IPC IPC(8): H01M50/129H01M50/131H01M50/14H01M50/145B32B15/20B32B15/085B32B15/088B32B27/36B32B27/34B32B27/32B32B27/08B32B7/12
CPCH01M50/129H01M50/131H01M50/14H01M50/145B32B15/20B32B15/085B32B15/088B32B27/36B32B27/34B32B27/32B32B27/08B32B7/12H01M2220/20B32B2307/54B32B2307/558B32B2307/714B32B2457/10B32B2457/16H01M50/119H01M50/1243H01M50/1245H01M50/126H01M50/121H01M10/052H01M2300/0065H01M10/0525H01G11/78H01G11/80B32B2307/581B32B2255/26B32B2553/00B32B2307/306B32B2255/10B32B2307/5825B32B2255/06B32B2307/736B32B2307/31Y02E60/10Y02T10/70H01M50/224H01M50/193B32B15/09H01M50/227
Inventor 吉野贤二
Owner 株式会社乐索纳克包装
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