	US 11,685,139 B2
	Thermally expandable sheet production method and shaped object production method
Yoshimune Motoyanagi, Hamura (JP); and Yuji Horiuchi, Higashiyamato (JP)
Assigned to CASIO COMPUTER CO., LTD., Tokyo (JP)
Filed by CASIO COMPUTER CO., LTD., Tokyo (JP)
Filed on Dec. 30, 2019, as Appl. No. 16/730,050.
Application 16/730,050 is a division of application No. 15/883,576, filed on Jan. 30, 2018, granted, now 10,562,263.
Claims priority of application No. 2017-042814 (JP), filed on Mar. 7, 2017.
Prior Publication US 2020/0139666 A1, May 7, 2020
This patent is subject to a terminal disclaimer.
Int. Cl. B32B 5/18 (2006.01); B32B 5/16 (2006.01); B32B 5/32 (2006.01); B32B 9/04 (2006.01); B29C 44/06 (2006.01); C08J 9/00 (2006.01); C08J 9/32 (2006.01); C08J 9/36 (2006.01); B32B 3/30 (2006.01); B32B 7/06 (2019.01); B32B 7/12 (2006.01); B32B 9/00 (2006.01); B32B 27/30 (2006.01); C09J 7/29 (2018.01); B32B 27/06 (2006.01); B32B 33/00 (2006.01); B41M 3/06 (2006.01); B29C 35/02 (2006.01); B32B 38/00 (2006.01); C08J 9/22 (2006.01); C08J 9/228 (2006.01); B29C 71/02 (2006.01); B41M 5/50 (2006.01); B41M 5/52 (2006.01); B29C 35/08 (2006.01)

CPC B32B 5/18 (2013.01) [B29C 35/0266 (2013.01); B29C 44/06 (2013.01); B32B 3/30 (2013.01); B32B 5/16 (2013.01); B32B 5/32 (2013.01); B32B 7/06 (2013.01); B32B 7/12 (2013.01); B32B 9/00 (2013.01); B32B 9/04 (2013.01); B32B 9/045 (2013.01); B32B 9/046 (2013.01); B32B 9/048 (2013.01); B32B 27/06 (2013.01); B32B 27/30 (2013.01); B32B 33/00 (2013.01); B41M 3/06 (2013.01); C08J 9/0066 (2013.01); C08J 9/32 (2013.01); C08J 9/36 (2013.01); C09J 7/29 (2018.01); B29C 2035/0822 (2013.01); B32B 38/0036 (2013.01); B32B 2038/0084 (2013.01); B32B 2038/0088 (2013.01); B32B 2266/057 (2016.11); B32B 2305/022 (2013.01); B32B 2305/54 (2013.01); B32B 2307/4026 (2013.01); B32B 2307/738 (2013.01); B32B 2307/75 (2013.01); B32B 2310/08 (2013.01); B32B 2311/18 (2013.01); B32B 2315/00 (2013.01); B41M 5/508 (2013.01); B41M 5/5218 (2013.01); C08J 7/08 (2013.01); C08J 9/22 (2013.01); C08J 9/228 (2013.01); C08J 2203/22 (2013.01)]

20 Claims

1. A thermally expandable sheet production method comprising:

a first formation step of forming on one side of a base a first thermally expansive layer comprising a first thermally expandable material; and

a second formation step of forming on the first thermally expansive layer a second thermally expansive layer comprising a second thermally expandable material,

wherein in the second formation step, white pigment is added to the second thermally expansive layer, and

wherein in the first formation step, the white pigment is not added to the first thermally expansive layer.