Process and apparatus for producing fibrets from cellulose deriv

Details Process and apparatus for producing fibrets from cellulose deriv Process and apparatus for producing fibrets from cellulose deriv

1997-04-10

1999-02-09

Theisen, Mary Lynn

Plastic and nonmetallic article shaping or treating: processes

Formation of solid particulate material directly from molten...

Utilizing centrifugal force or rotating forming zone

264 11, 264 14, 425 6, 425 7, 425 10, B29C 910

Patent

active

058689737

ABSTRACT:
The disclosure is a more economical process for producing fibrets of superior quality by directing a dope comprising a cellulose derivative and a suitable solvent therefor into a coagulant and exposing it there to a shearing field to coagulate of the dope and form the fibrets. The fibrets, the solvent and the coagulant are then separated off. The suspension formed from the dope and the coagulant is alternately accelerated and decelerated in the shearing field at least once, preferably at least twice. This makes it possible to maintain a high average degree of turbulence over a long distance, so that a dope of high viscosity can be processed. In the apparatus for producing fibrets, the at least one nozzle (46-49) is disposed within a dispersing facility (40) comprising rotor (44) and stator (43, 45) and further comprising at least two sprockets (50-53), of which at least one sprocket (50) is part of the rotor (44) of the dispersing facility (40).

REFERENCES:
patent: 3342921 (1967-09-01), Brundige et al.
patent: 3441473 (1969-04-01), Brundige et al.
patent: 3785918 (1974-01-01), Kawai et al.
patent: 3842007 (1974-10-01), Caputi et al.
patent: 3961007 (1976-06-01), Caputi, Jr. et al.
patent: 4040856 (1977-08-01), Litzinger
patent: 4047862 (1977-09-01), Keith
patent: 4192838 (1980-03-01), Keith et al.
patent: 4219512 (1980-08-01), Sinn et al.
patent: 4224259 (1980-09-01), Sander et al.
patent: 4237081 (1980-12-01), Murphy et al.
patent: 5071599 (1991-12-01), McNair, Jr. et al.
patent: 5175276 (1992-12-01), McNair, Jr. et al.

Affiliated with

Also associated with

Rating

Process and apparatus for producing fibrets from cellulose deriv does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Process and apparatus for producing fibrets from cellulose deriv, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process and apparatus for producing fibrets from cellulose deriv will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1946330