POLY(BUTYLENE TEREPHTHALATE) FILM, PACKAGING MATERIAL FOR BATTERIES, METHOD FOR PRODUCING PACKAGING MATERIAL FOR BATTERIES, AND BATTERY

WIPO Patent Application WO/2019/074016

A1

A poly(butylene terephthalate) film which can be used as a base layer in a packaging material for batteries which is provided with at least the base material layer, a barrier layer and a thermally fusable resin layer in this order, wherein the absolute value of a difference in heat of fusion ΔH1-2 that is determined by the following method is 3.0 J/g or more. (Method for determining the absolute value of a difference in heat of fusion ΔH1-2) A heat of fusion H1 on the first round is measured in accordance with the specification of JIS K7122-2012 using a differential scanning calorimeter by heating from a temperature of -50°C to a temperature of 250°C under the condition where the temperature rising rate is 10°C/min. Next, after the measurement of the heat of fusion H1, the cooling is carried out from a temperature of 250°C to a temperature of -50°C at a temperature lowering rate of 10°C/min, and then a heat of fusion H2 on the second round is measured by heating from a temperature of -50°C to a temperature of 250°C under the condition where a temperature rising rate is 10°C/min. An absolute value of a difference in heat of fusion ΔH1-2, which is a difference between the heat of fusion H1 and the heat of fusion H2, is calculated.

HIRAKI KENTA (JP)
TAKAHAGI ATSUKO (JP)
YAMASHITA RIKIYA (JP)

PCT/JP2018/037799

April 18, 2019

October 10, 2018

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DAINIPPON PRINTING CO LTD (JP)

B32B27/06; B32B27/36; H01M50/105

JP2015147309A	2015-08-20
JP2014233950A	2014-12-15
JP2017126510A	2017-07-20

TANAKA, Junya et al. (JP)

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