Title:
CO-EXTRUDED SHEET
Document Type and Number:
WIPO Patent Application WO/2024/014391
Kind Code:
A1
Abstract:
Provided is a co-extruded sheet for which bulging and cracking of the surface thereof can be suppressed during thermal shaping such as vacuum molding and which can achieve excellent mechanical strength. The co-extruded sheet 1 comprises: a core layer 2 containing a polycarbonate resin and formed from a foamed resin; and a skin layer 3 and a skin layer 4 formed from a non-foamed resin. The skin layer 3 is laminated to one main surface of the core layer 2, and the skin layer 4 is laminated to the other main surface of the core layer 2. The resin material for the skin layer 3 and the skin layer 4 has a deflection temperature under load equaling or exceeding the deflection temperature under load of the resin material for the core layer 2. The co-extruded sheet 1 has a density of 0.4 to 0.9 g/cm3 and satisfies expression (1): {0.10 ≤ (t1 + t2)/T ≤ 0.5}. In expression (1), t1 represents the thickness of the skin layer 3, t2 represents the thickness of the second skin layer 4, and T represents the thickness of the co-extruded sheet 1.
Inventors:
TANIGUCHI SATOKI (JP)
YUSA ATSUSHI (JP)
YAMAMOTO SATOSHI (JP)
GOTO TOSHIHARU (JP)
MIZUTANI KEI (JP)
YUSA ATSUSHI (JP)
YAMAMOTO SATOSHI (JP)
GOTO TOSHIHARU (JP)
MIZUTANI KEI (JP)
Application Number:
PCT/JP2023/025125
Publication Date:
January 18, 2024
Filing Date:
July 06, 2023
Export Citation:
Assignee:
MAXELL LTD (JP)
International Classes:
B32B27/36; B29C48/08; B29C48/21
Domestic Patent References:
| WO2014024882A1 | 2014-02-13 |
Foreign References:
| JP2001105557A | 2001-04-17 | |||
| JP2009505861A | 2009-02-12 | |||
| JP2002283523A | 2002-10-03 | |||
| JPH11300866A | 1999-11-02 | |||
| JPH11320799A | 1999-11-24 |
Attorney, Agent or Firm:
UEBA, Hidetoshi et al. (JP)
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