| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an outer film for a heat insulator with superior water vapor barrier properties. <P>SOLUTION: The outer film for a heat insulator includes repeating units represented by the following formulae (1), (2) and (3), and the content of a repeating unit containing a 2,6-naphthylene group is 40 mol% or more relative to the total amount of all of the repeating units: -O-Ar<SP POS="POST">1</SP>-CO- (1), -CO-Ar<SP POS="POST">2</SP>-CO- (2), -O-Ar<SP POS="POST">3</SP>-O-(3) (wherein Ar<SP POS="POST">1</SP>represents a 2,6-naphthylene group, a 1,4-phenylene group or a 4,4'-biphenylene group; and Ar<SP POS="POST">2</SP>and Ar<SP POS="POST">3</SP>independently represents a 2,6-naphthylene group, a 1,4-phenylene group, a 1,3-phenylene group or a 4,4'-biphenylene group, wherein each of hydrogen atoms contained in the group represented by Ar<SP POS="POST">1</SP>, Ar<SP POS="POST">2</SP>or Ar<SP POS="POST">3</SP>may be substituted by a halogen atom, an alkyl group or an aryl group). <P>COPYRIGHT: (C)2012,JPO&INPIT |
