US 12,350,911 B2
Stainable decorative sheet and method of staining decorative sheet
Natsuo Sugita, Tokyo (JP); Takaho Saito, Tokyo (JP); Kouki Fujii, Tokyo (JP); and Kosuke Nakai, Yokohama (JP)
Assigned to DAI NIPPON PRINTING CO., LTD., Tokyo (JP)
Appl. No. 17/762,656
Filed by DAI NIPPON PRINTING CO., LTD., Tokyo (JP)
PCT Filed Sep. 25, 2020, PCT No. PCT/JP2020/036434
§ 371(c)(1), (2) Date May 10, 2022,
PCT Pub. No. WO2021/065747, PCT Pub. Date Apr. 8, 2021.
Claims priority of application No. 2019-180057 (JP), filed on Sep. 30, 2019; and application No. 2020-156584 (JP), filed on Sep. 17, 2020.
Prior Publication US 2022/0332101 A1, Oct. 20, 2022
Int. Cl. B32B 29/02 (2006.01); B32B 5/02 (2006.01); B32B 7/12 (2006.01); D06M 15/263 (2006.01); D06M 101/08 (2006.01); D21H 27/18 (2006.01); E04F 13/00 (2006.01)
CPC B32B 29/02 (2013.01) [B32B 5/022 (2013.01); B32B 7/12 (2013.01); D06M 15/263 (2013.01); D21H 27/18 (2013.01); E04F 13/002 (2013.01); B32B 2255/12 (2013.01); B32B 2255/26 (2013.01); B32B 2255/28 (2013.01); B32B 2260/021 (2013.01); B32B 2260/046 (2013.01); B32B 2262/04 (2013.01); B32B 2307/4026 (2013.01); B32B 2307/412 (2013.01); B32B 2307/718 (2013.01); B32B 2307/732 (2013.01); B32B 2419/00 (2013.01); B32B 2605/00 (2013.01); D06M 2101/08 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A stainable decorative sheet comprising:
a paper base material,
an adhesive layer formed of a resin and disposed on at least one surface side of the paper base material,
a nonwoven fabric layer disposed on a surface side of the adhesive layer other than the surface on which the paper base material is disposed, and
a transparency improving layer formed of a resin and disposed on a surface side of the nonwoven fabric layer other than the surface on which the adhesive layer is disposed,
wherein the nonwoven fabric layer partially has a filling area A, in which a part of voids of fibers constituting the nonwoven fabric layer is filled with the resin forming the adhesive layer on the side where the adhesive layer is provided in the thickness direction of the nonwoven fabric layer, and a filling area B, in which a part of the voids of the fibers constituting the nonwoven fabric layer is filled with the resin forming the transparency improving layer on the side where the transparency improving layer is provided in the thickness direction of the nonwoven fabric layer,
wherein the nonwoven fabric layer is a single nonwoven fabric layer,
wherein the resin forming the adhesive layer contains a urethane resin, and
wherein a wetting tension of the urethane resin in the adhesive layer is 70 mN/m or more.