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Title:
HEAT-SHRINKABLE FILM, BOX-SHAPED PACKAGING MATERIAL, AND BATTERY CELL
Document Type and Number:
WIPO Patent Application WO/2018/003994
Kind Code:
A1
Abstract:
Provided is a heat-shrinkable film which can give a heat-sealed part prevented from having a hole or suffering adhesion failures and which after used in covering, is excellent in terms of durability and covering retentivity. The heat-shrinkable film is a single- or multilayered heat-shrinkable film which comprises, as a layer that constitutes at least one surface thereof, a surface layer comprising a copolyester as a main component, wherein a) the quantity of heat of crystal fusion (ΔHm) as determined by differential scanning calorimetry during heating at a rate of 10 ºC/min is 20 J/g or less, b) the absolute value of the fusion-bonding temperature difference (FT1-FT2) between the fusion-bonding temperature (FT1) for bonding one surface to itself and the fusion-bonding temperature (FT2) for bonding the other surface to itself is 20ºC or less, c) the degree of heat shrinkage in the main shrink direction through 10-second immersion in 80ºC water is 10-50%, and d) the percentage of neck-in after 10-second immersion in 70ºC water is 2.5% or less.

Inventors:
KOBAYASHI SHUJI (JP)
IKEDA KEITA (JP)
MIWA MASAKI (JP)
SAITO YUKI (JP)
HORI SHUJIRO (JP)
Application Number:
PCT/JP2017/024243
Publication Date:
January 04, 2018
Filing Date:
June 30, 2017
Export Citation:
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Assignee:
MITSUBISHI CHEM CORP (JP)
International Classes:
C08J5/18; B29C61/02; B32B7/02; B32B27/36; B65D65/40; H01M50/103; B29K67/00
Foreign References:
JP2005131824A2005-05-26
JP2007160544A2007-06-28
JP2009184340A2009-08-20
JP2011079229A2011-04-21
JP2014534911A2014-12-25
JP2012054029A2012-03-15
JP2013033668A2013-02-14
JP2004083717A2004-03-18
JPS63309424A1988-12-16
Other References:
"Eastar Copolyester 6763", TECHNICAL DATA SHEET, 11 April 2016 (2016-04-11), Retrieved from the Internet
THE NIKKAN KOGYO SHINBUN LTD.: "Plastic Seikei Kako Data Book, 2nd edition", 28 January 2002 (2002-01-28), pages 24 - 27
Attorney, Agent or Firm:
SAKAI INTERNATIONAL PATENT OFFICE (JP)
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