Cellulose ester fibrillar structure

Details Cellulose ester fibrillar structure Cellulose ester fibrillar structure

1975-12-08

1977-09-13

Spicer, Jr., Robert L.

Plastic article or earthenware shaping or treating: apparatus

Means making particulate material directly from liquid or...

By slinger or rotating liquid comminutor

264 8, 264184, B29C 2300

Patent

active

040478629

ABSTRACT:
Cellulose ester fibrillar material is produced by forming a cellulose ester dope, pumping the dope to an extrusion orifice, extruding the dope through the orifice into a region of shear and high draw in a precipitation bath containing a non-solvent for said cellulose ester maintained at an elevated temperature. The fibrillar material is preferably subjected to further treatment to reduce the particle size and set the structure by expanding voids and expelling residual solvent. Paper having a high degree of opacity is produced by incorporating the cellulose ester material to obtain light weight paper.

REFERENCES:
patent: 1500930 (1924-07-01), Hooper
patent: 1500931 (1924-07-01), Hooper
patent: 1500932 (1924-07-01), Hooper
patent: 2217235 (1940-10-01), Rieser
patent: 2299929 (1942-10-01), Roynolds, Jr.
patent: 2495147 (1950-01-01), Street
patent: 3001242 (1961-09-01), Heffelfinger
patent: 3272893 (1966-09-01), Mogensen
patent: 3285722 (1966-11-01), Leveeque et al.
patent: 3928009 (1975-12-01), Perry

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