US 11,807,988 B2
Sheet manufacturing method and sheet manufacturing apparatus
Masahide Nakamura, Nagano (JP); Hideki Tanaka, Nagano (JP); Yoshiyuki Nagai, Nagano (JP); and Yoko Nakai, Nagano (JP)
Assigned to Seiko Epson Corporation, Tokyo (JP)
Filed by SEIKO EPSON CORPORATION, Tokyo (JP)
Filed on Mar. 29, 2022, as Appl. No. 17/656,902.
Claims priority of application No. 2021-059787 (JP), filed on Mar. 31, 2021.
Prior Publication US 2022/0316138 A1, Oct. 6, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. D21F 7/00 (2006.01); D21F 1/66 (2006.01); D21F 3/02 (2006.01); D21F 9/04 (2006.01); D21F 11/06 (2006.01)
CPC D21F 7/003 (2013.01) [D21F 1/66 (2013.01); D21F 3/0272 (2013.01); D21F 9/04 (2013.01); D21F 11/06 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A sheet manufacturing method comprising:
a web forming step of forming a web by accumulating a defibrated product in a dry manner;
a moisture imparting step of imparting the web with moisture;
a pressurizing step of pressurizing the web to which the moisture is imparted; and
a heating step of heating the web to which the moisture is imparted, wherein
a water content of the web to which the moisture is imparted in the moisture imparting step is 12% by mass or more,
a pressure applied to the web in the pressurizing step is 0.2 MPa or more, and a temperature of the web in the heating step is 100° C. or lower.