公开(公告)号：WO1992007985A1

公开(公告)日：1992-05-14

申请号：PCT/US1991007229

申请日：1991-10-01

Applicant: WEYERHAEUSER COMPANY

Inventor： WEYERHAEUSER COMPANY ,  HEBBARD, Carl ,  PERDELWITZ, Lee, E., Jr. ,  GADDIS, Paul, G.

IPC: D04H01/70

CPC classification number: A61F13/15617 ,  D04H1/4382 ,  D04H1/732 ,  Y10T156/1712 ,  Y10T442/668 ,  Y10T442/692 ,  Y10T442/698

Abstract: A fiber blending system includes an apparatus and method of forming a mat of cellulosic fibers and synthetic fibers, as well as a mat thereby formed. The method includes the steps of fiberizing cellulosic material into cellulosic fibers in a fiberizer, volumetrically metering a metered amount of synthetic fibers, and injecting the metered amount of synthetic fibers into the cellulosic fibers. The cellulosic fibers are blended with the metered amount of synthetic fibers in a blending chamber to form a fiber blend. The fiber blend is dispersed through a fiber disperser having apertures of a preselected size and shape to provide a dispersed fiber blend. A third type of fiber may also be mixed with the dispersed fiber blend. The dispersed fiber blend is collected as a mat on a fiber collector to provide a mat of blended cellulosic and synthetic fibers. The mat may be thermobonded by a thermobonder and sandwiched between a facing sheet and a backing sheet. By varying the aperture preselection, as well as the size and type of fibers, a bonded mat having desired mat characteristics is formed.