Title:
PACKING BAG IN WHICH POLYBUTYLENE TEREPHTHALATE FILM IS USED
Document Type and Number:
WIPO Patent Application WO/2019/021759
Kind Code:
A1
Abstract:
The present invention provides a packing bag comprising a laminate in which are laminated a biaxially stretched polybutylene terephthalate film layer having a thickness of 8-25 μm and a polyolefin film sealant layer having a thickness of 10-100 μm, wherein the packing bag is characterized in that the biaxially stretched polybutylene terephthalate film satisfies (a) through (c) below, the packing bag having exceptional dimensional stability, workability, breaking resistance, and chemical resistance, and having little migration of extracts to the contents. (a) The film includes 60% by mass or more of a polybutylene terephthalate resin. (b) The thermal contraction rate at 150°C × 30 min is -2% to 4%. (c) The total amount of THF and 1,4-butanediol volatilized during heating at a temperature of 135°C for 60 minutes is 2000 ppb or less.
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Inventors:
GOTO TAKAMICHI (JP)
Application Number:
PCT/JP2018/025169
Publication Date:
January 31, 2019
Filing Date:
July 03, 2018
Export Citation:
Assignee:
TOYO BOSEKI (JP)
International Classes:
B65D65/40; B32B27/00; B32B27/32; B32B27/36; B65D30/02
Domestic Patent References:
| WO2016171172A1 | 2016-10-27 | |||
| WO2016171173A1 | 2016-10-27 | |||
| WO2017126563A1 | 2017-07-27 | |||
| WO2015072163A1 | 2015-05-21 |
Foreign References:
| JP2012214248A | 2012-11-08 | |||
| JP2002067213A | 2002-03-05 | |||
| JP2018020844A | 2018-02-08 | |||
| JPH06278240A | 1994-10-04 | |||
| JP4857482B2 | 2012-01-18 | |||
| JP2013154605A | 2013-08-15 | |||
| JP2012214248A | 2012-11-08 | |||
| JPH08311212A | 1996-11-26 |
Other References:
OSAMU SATO ET AL., CHEM. LETT., vol. 44, 2015, pages 1312 - 1314
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