Process for the manufacture of laminated sheets of cellulosic an

Details Process for the manufacture of laminated sheets of cellulosic an Process for the manufacture of laminated sheets of cellulosic an

1976-12-27

1980-07-15

Smith, William F.

Paper making and fiber liberation

Processes and products

Multi-layer waterlaid webs or sheets

162132, 162133, 162146, 162206, D21F 1104

Patent

active

042127033

ABSTRACT:
A laminated structure of sheets of fibrous cellulosic and polymeric materials is prepared upon a multiple plane table cardboard manufacturing machine by forming a sheet of cellulosic fibers from a pulp thereof on at least one of the plane tables of the machine, forming a sheet of polyolefinic fibrids from a pulp thereof on a second plane table of the machine, and forming a cellulosic fiber-polyolefinic fibrid sheet from a pulp thereof on a third plane table of the machine, joining those sheets in superposed position so that the sheet of cellulosic fibers is in the middle, drying the superposed sheets, and then calendering the dry superposed sheets at a temperature not lower than that necessary to melt at least partially the polyolefinic fibrids.

REFERENCES:
patent: 2881072 (1959-04-01), Clark
patent: 3123518 (1964-03-01), Bundy
patent: 3511750 (1970-05-01), Hider
patent: 3669829 (1972-06-01), Caldo et al.
patent: 3778341 (1973-12-01), Plummer et al.

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