US2057141A - Production of filaments, threads, bands, ribbons and the like, from cellulose derivatives - Google Patents

Production of filaments, threads, bands, ribbons and the like, from cellulose derivatives Download PDF

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Publication number
US2057141A
US2057141A US337737A US33773729A US2057141A US 2057141 A US2057141 A US 2057141A US 337737 A US337737 A US 337737A US 33773729 A US33773729 A US 33773729A US 2057141 A US2057141 A US 2057141A
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US
United States
Prior art keywords
alcohol
filaments
solvent
denier
ribbons
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US337737A
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English (en)
Inventor
Eichengrun Arthur
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Celanese Corp
Original Assignee
Celanese Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Celanese Corp filed Critical Celanese Corp
Application granted granted Critical
Publication of US2057141A publication Critical patent/US2057141A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
    • D01F2/00—Monocomponent artificial filaments or the like of cellulose or cellulose derivatives; Manufacture thereof
    • D01F2/24—Monocomponent artificial filaments or the like of cellulose or cellulose derivatives; Manufacture thereof from cellulose derivatives
    • D01F2/28—Monocomponent artificial filaments or the like of cellulose or cellulose derivatives; Manufacture thereof from cellulose derivatives from organic cellulose esters or ethers, e.g. cellulose acetate
    • D01F2/30—Monocomponent artificial filaments or the like of cellulose or cellulose derivatives; Manufacture thereof from cellulose derivatives from organic cellulose esters or ethers, e.g. cellulose acetate by the dry spinning process

Definitions

  • This invention relates to improvements in the production of filaments, threads, bands, ribbons and the like particularly from cellulose derivatives such as esters or ethers, by extruding suit- 5 able solutions of such cellulose derivatives.
  • the quality of artificial silk filaments produced is at the present time tested by their fineness (denier) and their strength.
  • the desired fineness i. e., the desired denier
  • various measures are resorted to, such as for example variation of the size of the spinning aperture, for example, from 0.09 mm. to 0.05 mm., variation of the pressure with which the solution is extruded through the spinning aperture or variation of the tem- 20 perature of the solution or of the spinning cabinet or finally alteration of the amount of the cellulose derivative in the solution.
  • the method of the present invention consists in employing as vehicle for the cellulose derivative, a mixture comprising a lower boiling point solvent or latent solvent (suchas acetone or a liquid such as methylene chloride which per se is a non-solvent for said cellulose derivative but nevertheless acts as a solvent therefor in the presence of another liquid) in conjunction with one or more higher boiling point coagulants for said cellulose derivative, (such as alcohol, benzol or water) and regulating the dimensions of the extruded filaments or the like without altering the size of the extrusion apertures by adjusting the relative amounts of the constituents of the vehicle keeping said cellulose derivative in solution whilst using winding speeds above the normal (namely about 75 metres per minute) and co-relating said Winding speeds with the dimensions of the extruded filaments or the like.
  • a lower boiling point solvent or latent solvent such as acetone or a liquid such as methylene chloride which per se is a non-solvent for said cellulose derivative but nevertheless acts as a solvent therefor in
  • the invention may be carried out by controlling the ratio which the amounts of alcohol constituting the higher boiling coagulant bear tothe amount of methylene chloride in said vehicle.
  • Example 1 of artificial silk filaments by the extrusion of a solution of an acetone-soluble cellulose acetate in methylene chloride containing alcohol in amounts compatible with maintaining the mixture non-inflammable. Said application was directed towards the production of a non-inflammable homogeneous solution of cellulose acetate and no particular attention was paid to the amount or proportion of other liquids added to the methylene chloride provided that the solu-.
  • solvent mixtures consisting of ethylene chloride and alcohol; ethylene chloride, alcohol and acetone; ethyl acetic acetate and alcohol, ethyl formate and alcohol, and may vary the denier by altering the proportion of alcohol.
  • I may even employ a mixture of acetone and alcohol and vary the ratio of alcohol in the mixture in order to modify the denier.
  • the present invention enables perfect filaments of unvarying cross-section to be obtained, presumably by virtue of the fact that when employing a vehicle comprising a rapidly evaporating solvent and a less rapidly evaporating non-solvent or coagulant, the solidifying effect of the ning artificial filaments bya stretch-spinning process, very low deniers can'be obtained which are comparable to those obtained in the cuprammonium process.
  • Process of producing fine filaments which comprises dissolving cellulose acetate in a mixture 15 of liquids which is a solvent for the cellulose acetate and which consists substantially of methylene chloride and alcohol, extruding the solution through normal apertures into an evaporative atmosphere, the denier of the filaments being regulated by correlating the winding speeds with the concentration of the solvent and non-solvent constituents in the spinning solution.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Artificial Filaments (AREA)
US337737A 1928-02-08 1929-02-05 Production of filaments, threads, bands, ribbons and the like, from cellulose derivatives Expired - Lifetime US2057141A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3991/28A GB317408A (en) 1928-02-08 1928-02-08 Improvements in the production of filaments, threads, bands, ribbons and the like, from cellulose derivatives

Publications (1)

Publication Number Publication Date
US2057141A true US2057141A (en) 1936-10-13

Family

ID=9768697

Family Applications (1)

Application Number Title Priority Date Filing Date
US337737A Expired - Lifetime US2057141A (en) 1928-02-08 1929-02-05 Production of filaments, threads, bands, ribbons and the like, from cellulose derivatives

Country Status (4)

Country Link
US (1) US2057141A (enrdf_load_stackoverflow)
BE (1) BE357988A (enrdf_load_stackoverflow)
FR (1) FR669309A (enrdf_load_stackoverflow)
GB (1) GB317408A (enrdf_load_stackoverflow)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2609304A (en) * 1947-02-24 1952-09-02 Geigy Co Ltd Plasticized cellulose triacetate
US2982598A (en) * 1955-12-12 1961-05-02 British Celanese Manufacture of cellulose triacetate textile materials
US2999004A (en) * 1957-10-21 1961-09-05 Celanese Corp Treating filamentary material

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4631157A (en) * 1985-09-16 1986-12-23 Bend Research, Inc. Production of permeable cellulose triacetate membranes

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2609304A (en) * 1947-02-24 1952-09-02 Geigy Co Ltd Plasticized cellulose triacetate
US2982598A (en) * 1955-12-12 1961-05-02 British Celanese Manufacture of cellulose triacetate textile materials
US2999004A (en) * 1957-10-21 1961-09-05 Celanese Corp Treating filamentary material

Also Published As

Publication number Publication date
GB317408A (en) 1929-08-08
BE357988A (enrdf_load_stackoverflow)
FR669309A (fr) 1929-11-14

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