Title:
SEALANT FILM AND PRODUCTION METHOD THEREFOR
Document Type and Number:
WIPO Patent Application WO/2017/164190
Kind Code:
A1
Abstract:
Provided is a sealant film having a layer comprising a polyester (A) that contains a terephthalic acid unit, an ethylene glycol unit, a diethylene glycol unit, and another comonomer unit, wherein: the polyester (A) contains 25-50 mol% of the terephthalic acid unit, 25-49.5 mol% of the ethylene glycol unit, 0.5-2.5 mol% of the diethylene glycol unit, and 2-25 mol% of the other comonomer unit having 5 or more carbon atoms; the sealant film has a degree of crystallinity of less than 16%; and the sealant film is a drawn film that has a shrinkage factor of at least 6% in a maximum shrinkage direction when left to stand at 125°C for 20 seconds. Said sealant film has superior mechanical properties, in particular, superior tensile elongation, and exhibits excellent heat sealability and non-sticking ability as well.
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Inventors:
SAKANO TAKESHI (JP)
TANABE SOICHIRO (JP)
TANABE SOICHIRO (JP)
Application Number:
PCT/JP2017/011274
Publication Date:
September 28, 2017
Filing Date:
March 21, 2017
Export Citation:
Assignee:
KURARAY CO (JP)
International Classes:
B29C61/06; B29C55/02; C08J5/18; B65D65/40; C08G63/183
Domestic Patent References:
| WO2014175313A1 | 2014-10-30 |
Foreign References:
| JP2006305975A | 2006-11-09 | |||
| JP2007002008A | 2007-01-11 | |||
| JPH0532800A | 1993-02-09 | |||
| JP2007176495A | 2007-07-12 | |||
| JP2001031845A | 2001-02-06 | |||
| JP2015066802A | 2015-04-13 |
Other References:
See also references of EP 3434442A4
Attorney, Agent or Firm:
SETOUCHI INTERNATIONAL PATENT FIRM (JP)
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