Title:
MULTILAYER FILM AND INTERMEDIATE FILM FOR LAMINATED GLASS FORMED OF SAME
Document Type and Number:
WIPO Patent Application WO/2015/059831
Kind Code:
A1
Abstract:
A multilayer film which has a layer (X) that contains a polyvinyl acetal (I) having an acetalization degree of 55-80% by mole, a content of a vinyl ester monomer unit of 0.1-1.5% by mole and a viscosity-average polymerization degree of 1,400-5,000, an ultraviolet absorbent and a plasticizer, and a layer (Y) that contains a polyvinyl acetal (II) having an acetalization degree of 70-85% by mole, a content of a vinyl ester monomer unit of 5-15% by mole and a viscosity-average polymerization degree of 1,400-5,000, heat blocking fine particles, a surfactant, an alkali metal salt and/or an alkaline earth metal salt, and a plasticizer, and wherein the layer (X) is arranged on both outer surfaces of the layer (Y). This multilayer film satisfies formulae (1) and (2).
(A - B)/A < 0.80 (1)
1.00 × 10-2 < (b/y)/(a/x) < 2.00 × 10-1 (2)
Consequently, there can be provided a film which has sufficient heat blocking performance, sufficient sound absorption performance, reduced inclusion of foreign substances (unsolved contents) and excellent recyclability, while being suppressed in coloration caused by heating.
Inventors:
KUSUDOU TAKESHI (JP)
YUI TAIGA (JP)
YUI TAIGA (JP)
Application Number:
PCT/JP2013/079023
Publication Date:
April 30, 2015
Filing Date:
October 25, 2013
Export Citation:
Assignee:
KURARAY CO (JP)
International Classes:
B32B27/30; B32B17/10; C03C27/12; C08F8/28; C08F16/38; C08L29/14
Foreign References:
| JP2003252655A | 2003-09-10 | |||
| JP2004002108A | 2004-01-08 | |||
| JP2012025645A | 2012-02-09 | |||
| JP2011251906A | 2011-12-15 | |||
| JP2011084468A | 2011-04-28 | |||
| JP2011508802A | 2011-03-17 |
Attorney, Agent or Firm:
NAKATSUKASA, Shigeki et al. (JP)
Shigeki Nakamu (JP)
Shigeki Nakamu (JP)
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