EP 0251673 A1 19880107 - Process for making wet-laid structures containing individualized, stiffened fibers.
Title (en)
Process for making wet-laid structures containing individualized, stiffened fibers.
Title (de)
Nassverfahren zur Herstellung einer Struktur aus einzeln versteiften Fasern.
Title (fr)
Procédé de fabrication d'une structure par voie humide comprenant des fibres individuelles rigidifiées.
Publication
Application
Priority
US 87967386 A 19860627
Abstract (en)
A process for making wet-laid structures containing individualized, stiffened fibers. The wet-laid structures are obtained by: providing a slurry containing individualized, crosslinked fibers; depositing the slurry of fibers on a foraminous forming wire; directing at least one stream of fluid upon the fibers such that the fluid disperses flocculations of fibers and also inhibits the formation of additional flocculations of the fibers; and setting the fibers into a sheeted form while the fibers are in a substantially unflocculated condition. The step of setting the fibers into sheeted form may be performed by pressing the fibers against the forming wire with a screened roll, such as a cylindrical Dandy Roll. Preferably, a plurality of streams of fluid having sequentially decreasing volumetric flow rates are directed upon the fibers. The individualized, stiffened fibers may also be mixed with conventional, stiffened fibers or highly refined, stiffened fibers while in slurry form.
IPC 1-7
IPC 8 full level
D21F 1/00 (2006.01); D21F 1/34 (2006.01); D21F 11/00 (2006.01); D21H 11/20 (2006.01)
CPC (source: EP)
D21F 1/009 (2013.01); D21F 1/34 (2013.01); D21F 11/00 (2013.01); D21H 11/20 (2013.01)
Citation (search report)
- [A] DE 3217805 A1 19831117 - METALLGIESSEREI UND ARMATURENF [DE]
- [A] US 3470064 A 19690930 - SCHWERDT HANS
- [A] GB 149416 A 19200810 - LEON THIRY
- [A] US 3455778 A 19690715 - BERNARDIN LEO J
Designated contracting state (EPC)
BE DE FR GB IT NL SE
DOCDB simple family (publication)
EP 0251673 A1 19880107; EP 0251673 B1 19920226; AU 612322 B2 19910711; AU 7476087 A 19880204; CA 1306894 C 19920901; DE 3776820 D1 19920402; FI 872843 A0 19870626; FI 872843 A 19871228; FI 90678 B 19931130; FI 90678 C 19940310
DOCDB simple family (application)
EP 87305611 A 19870624; AU 7476087 A 19870626; CA 539775 A 19870616; DE 3776820 T 19870624; FI 872843 A 19870626