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Title:
METHOD FOR PRODUCING MULTILAYER CONTAINER
Document Type and Number:
WIPO Patent Application WO/2021/070629
Kind Code:
A1
Abstract:
Provided is a method for producing a multilayer container in which interlayer separation is unlikely to occur, the multilayer container having a layer comprising a polyester resin as a primary component and a layer comprising a polyamide resin as a primary component. This method for producing a multilayer container comprises biaxially stretching and blow molding a preform having a polyester resin layer and a polyamide resin layer. The storage elastic modulus G' of the polyamide resin is not less than 5 MPa and less than 100 MPa. The moisture content in the polyamide resin layer is 0.5% or less. The polyamide resin is a xylylenediamine-based polyamide resin in which 70 mol% or more of constituent units derived from a diamine are derived from meta-xylylenediamine, 80-97 mol% of constituent units derived from a dicarboxylic acid are derived from an α,ω-straight chain aliphatic dicarboxylic acid having 4-8 carbon atoms, and 20-3 mol% of constituent units derived from a dicarboxylic acid are derived from an aromatic dicarboxylic acid.

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Inventors:
YAMANAKA MASAKI (JP)
KOUNO KENJI (JP)
MIYABE TAKANORI (JP)
Application Number:
PCT/JP2020/036188
Publication Date:
April 15, 2021
Filing Date:
September 25, 2020
Export Citation:
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Assignee:
MITSUBISHI GAS CHEMICAL CO (JP)
International Classes:
B29C49/22; B29C49/06; B32B1/02; B32B27/34; B32B27/36; B32B38/00; B65D1/00
Domestic Patent References:
WO2018198855A12018-11-01
WO2007086331A12007-08-02
WO2013168804A12013-11-14
WO2012014772A12012-02-02
WO2016208272A12016-12-29
WO2017134946A12017-08-10
WO2017090556A12017-06-01
WO2018074234A12018-04-26
WO2018155171A12018-08-30
WO2019026499A12019-02-07
Foreign References:
JP2016198911A2016-12-01
US20070154668A12007-07-05
JP2016198911A2016-12-01
JP2007210209A2007-08-23
JP2016198912A2016-12-01
JP2016169027A2016-09-23
JPS60232952A1985-11-19
JP2006111718A2006-04-27
JP2017105873A2017-06-15
JP2011132550A2011-07-07
JPH02229023A1990-09-11
JP2011037199A2011-02-24
Other References:
See also references of EP 4043180A4
Attorney, Agent or Firm:
SIKs & Co. (JP)
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