US 12,291,805 B2
Pulp fibrous accumulated sheet and method for producing pulp fibrous accumulated sheet
Kikuo Yamada, Tokyo (JP)
Assigned to LEC, INC., Tokyo (JP)
Filed by LEC, INC., Tokyo (JP)
Filed on Jun. 18, 2024, as Appl. No. 18/746,952.
Application 16/398,367 is a division of application No. 15/545,166, abandoned, previously published as PCT/JP2016/052282, filed on Jan. 27, 2016.
Application 18/746,952 is a continuation of application No. 16/398,367, filed on Apr. 30, 2019, granted, now 12,060,665.
Claims priority of application No. 2015-015594 (JP), filed on Jan. 29, 2015; application No. 2015-020532 (JP), filed on Feb. 4, 2015; and application No. 2015-253941 (JP), filed on Dec. 25, 2015.
Prior Publication US 2024/0337050 A1, Oct. 10, 2024
Int. Cl. B27N 3/00 (2006.01); B27N 3/04 (2006.01); D04H 1/425 (2012.01); D04H 1/50 (2012.01); D04H 1/54 (2012.01); D04H 1/587 (2012.01); D04H 1/732 (2012.01); D21F 11/00 (2006.01); B27N 1/00 (2006.01); B27N 3/24 (2006.01)
CPC D04H 1/425 (2013.01) [B27N 3/00 (2013.01); B27N 3/04 (2013.01); D04H 1/50 (2013.01); D04H 1/54 (2013.01); D04H 1/587 (2013.01); D04H 1/732 (2013.01); D21F 11/00 (2013.01); B27N 1/00 (2013.01); B27N 3/24 (2013.01)] 7 Claims
OG exemplary drawing
 
1. A method for producing a pulp fibrous accumulated sheet, comprising:
a fiber accumulating step of forming a fibrous accumulated body on a mesh body by subjecting a crushed pulp or base-fibers mainly including a crushed pulp to fiber accumulation by aspiration;
a compression and pressurization step of compressing and pressurizing the obtained fibrous accumulated body to thereby form the plurality of fiber crimped parts on the fibrous accumulated body so that crushed pulp fibers each straddling the adjacent fiber crimped parts are present;
a binder application step of applying a binder onto at least one surface of the fibrous accumulated body on which the fiber crimped parts have been formed; and
a drying step of drying the fibrous accumulated body after the binder application step to form a liquid permeable pulp fibrous accumulated layer.