US2705184A - Process for the production of rayon products - Google Patents

Process for the production of rayon products Download PDF

Info

Publication number
US2705184A
US2705184A US29718052A US2705184A US 2705184 A US2705184 A US 2705184A US 29718052 A US29718052 A US 29718052A US 2705184 A US2705184 A US 2705184A
Authority
US
Grant status
Grant
Patent type
Prior art keywords
viscose
cellulose
litre
grams
production
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
Inventor
Drisch Nicolas
Herrbach Paul
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.)
Textile & Chemical Res Co
Original Assignee
Textile & Chemical Res Co
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
Grant date

Links

Images

Classifications

    • DTEXTILES; PAPER
    • D01NATURAL OR ARTIFICIAL THREADS OR FIBRES; SPINNING
    • D01FCHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
    • D01F2/00Monocomponent artificial filaments or the like of cellulose or cellulose derivatives; Manufacture thereof
    • D01F2/06Monocomponent artificial filaments or the like of cellulose or cellulose derivatives; Manufacture thereof from viscose
    • DTEXTILES; PAPER
    • D01NATURAL OR ARTIFICIAL THREADS OR FIBRES; SPINNING
    • D01FCHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
    • D01F2/00Monocomponent artificial filaments or the like of cellulose or cellulose derivatives; Manufacture thereof
    • D01F2/06Monocomponent artificial filaments or the like of cellulose or cellulose derivatives; Manufacture thereof from viscose
    • D01F2/08Composition of the spinning solution or the bath
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10STECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S264/00Plastic and nonmetallic article shaping or treating: processes
    • Y10S264/27Process of spinning viscose where viscose has high degree of polymerization

Description

v value above 60 into United States Patent PROCESS FOR THE PRODUCTION OF PRODUCTS Nicolas Drisch and Paul Herrbach, Paris, France, as-

signors to Textile & Chemical Research Company, Ltd., St. Peter Port, Guernsey, Channel Islands, a corporation of Great Britain No Drawing. Application July 3,

Serial No. 297,180

Claims priority, application France January 15, 1952 8 Claims. (Cl. 18-54) This invention relates to the production of viscose rayon, artificial horse-hair, ribbons and the like and particularly to the production of viscose staple fibre.

In co-pending application No. 193,746, now Patent No. 2,607,955, there is described a process for spinning viscose having a viscosity of at least 400 poises and a 'ycoagulating baths of low acid (e. g. sulphuric acid) concentration, the filamentary products being fixed by treatment with hot aqueous liquid.

The process described in the application has since been the subject of long research, the remarkable results of which form the subject of the present invention, which relates to a modified process by means of which it is possible to obtain fibres having a remarkably high resistance to repeated bending. The known processes 'for the production of rayon, including those described in the said co-pending application, do not enable fibres to be obtained which have as high a resistance to repeated bending as is desired. Resistance to bending is of fundamental importance to the behaviour of artificial staple fibres during use and the modified process of the present invention is therefore more particularly difected to the production of staple fibre. f;

It is an object of the present invention to provide artificial filamentary materials of viscose which have a remarkably high resistance to repeated bending. A further object of this invention is to provide artificial viscose staple fibre which has a high resistance to repeated bending. A still further object is to provide processes whereby such filamentary materials and staple fibre? may be obtained. Another object of the invention is'f-to provide a combination of a viscose spinning solution and a coagulating bath of such compositions that the aforesaid products are obtained. Other objects of the invention will appear hereinafter.

It has been discovered that products of very high resistance to bending can be obtained, in processes using viscose of the aforesaid special properties and dilute acid coagulating baths by increasing the sodium sulphate content of the coagulating bath. A content of sodium sulphate up to 25 g./litre in the coagulating bath is known, and results from the reaction between the caustic soda in the viscose and the weakly acid bath, taking into account the constant renewal of the bath.

It has now been discovered that the resistance to repeated bending increases substantially if the sodium sulphate content is increased to at least 50 grams per litre, and preferably to 80 to 150 grams per litre, the upper limit being imposed by the solubility of the sodium sul- YON As described in the co-pending application, it is essential to use cellulose pulp of very high degree of polymerisation, for example of at least 700 to 800, and to conduct the preparation of the viscose under conditions such that the cellulosic material is depolymerised to a minimum extent. It should, for the purposes of the present invention have a viscosity of at least 300 poises and a 'y-value above 60 for satisfactory spinning. Its cellulose content may be 4-8% or more. The caustic soda content may vary, but is preferably 35%, although it may be higher.

The following examples will serve to illustrate the invention but are not to be regarded as limiting it in any way.

EXAMPLE I Linters of a degree of polymerisation of 700800 are mixed in caustic soda (concentration 225-240 g./litre) and pressed until the ratio of the final weight of the alkali-cellulose to the weight of 'y-cellulose contained in the pulp used is 2.8. The alkali-cellulose is not ripened but is shredded and then xanthogenated with of carbon disulphide (calculated on the 'y-cellulose content of the pulp) at between 25 and 30. Degradation due to the action of atmospheric oxygen is limited to a minimum during the treatment, preferably by working under vacuum or in an inert atmosphere.

The cellulose xanthogenate is worked into a paste with concentrated caustic soda at -5 to +S C. and the product is mixed with dilute caustic soda or water to produce a viscose containing 6% cellulose and 3% to 5% caustic soda. The viscose obtained is not aged. It has a -value above 70 and ,a viscosity of about 400 poises.

It may be mentioned here that viscoses of high degree of polymerisation having viscosities substantially lower than 300 poises do not spin satisfactorily.

The viscose is spun from a horizontal spinneret, the stream of fibres leaving the spinneret rising vertically in the spinning bath. A dilute sulphuric acid coagulating bath is employed which may contain up to 25 grams per litre of sulphuric acid at room temperature. The sodium sulphate content of the coagulating bath must be greater than 50 grams per litre, and preferably greater than 80 grams per litre. The gel obtained following the coagulation is subject-ed to a stretch which may vary between 30% and 150% according to the characteristics which it is desired to impart to the thread. The gel is then treated with boiling water to regenerate the cellulose.

Under these conditions, excellent spinning is achieved. The bundle of filaments is subjected to the usual finishing treatments and dried. It may be cut into lengths by means of a cutting machine before the regeneration treatment, or the finished bundle may be stretched continuously until it breaks for the purpose of directly forming a phate in the slightly acid bath. baths contain 30 g./l1tre of sulphuric acid.

Table Fibre A Fibre B Fibre 0 Fibre D Fibre E Fibre F 30 g./l. 30 g./l. 30 g./] 50 g./l. 115 g./l 115 g./] NBzSO4 NaaSOl N 1280 NazSOi NBzSOi NflzSOl Meancount 1 49 1 30 1 49 1 38 2 37 1 35 Percent; irregularity 4. 7 7 6. 6 Rkm, dry 36. 2 23.1 28 32.1 31.3 33. 7 Rkm, wet 27 19 21. 3 25. 6 24.1 27. 3 Dry elongation, percent 9. 2 7. 8 1i. 1 10. 5 13. 3 11. 7 Wet elongation, percent 8.8 7. 3 14. 8 11 15.3 13 Quality factor 51 82 85 93. 5 98. 1 D. P 583 488 406 517 610 Dye aifinlty 10 3 25 18 Resistance to bending..... 270 566 700 870 2, 400 6, 620

It is pointed out that Rkm" is the kilometric length, that is to say, the length of fibre of the same type which must be suspended from the fibre to be tested in order to break it, and represents nine times the tenacity.

The quality factor is the wet tenacity multiplied by the square root of the wet elongation. The D. P. is the. mean degree of polymerisation. The resistance to bending is measured as the number of bends before break with a load of 0.33- g. per denier.

The remarkable increase in by means of baths containing sulphate will be seen.

EXAMPLE ll Viscose is prepared under approximately the same conditions as in Example I, with a cellulose content of 7% and a caustic soda content of 4%. The viscosity is 400 poises, the 'y is 75 and the D. P. of the cellulose in the viscose is 410.

This viscose is spun at room temperature into a bath of sulphuric acid which may contain up to 30 grams of sulphuric acid per litre, and which contains. inaddition 30 grams of sodium sulphate per litre in one case, and 100 grams of sodium sulphate in another case, with the usual stretching of the gel, acid cutting and decomposition in boiling water followed by washing and finishing treatments under the usual known conditions.

The fibres of 1.5 d. obtained have similar serimetric characteristics namely:

repeated beriding obtained large quantities of sodium Dry tenacity g./d 3.4 Wet tenacity g./d 2.8 Dry elongation "percent" 10.5 Wet elongation do 10.9

but in the first case it withstands 600 bending cycles, and in the second case 2000 bending cycles, the load being 0.33 g./d. as before.

These tests also confirm the very substantial improvement of the resistance to repeated bending due to the increase in the sodium sulphate content of the coagulating bath.

We claim:

1. Process for the production of viscose rayon suitable for the production of staple fibre which comprises spinning viscose prepared from cellulose pulp having a degree of polymerisation or 700 minimum, without ripening the alkali-cellulose and without ageing of the viscose, the viscose having a viscosity of at least 300 pols-es, and; a gamma higher than 70, the coagulating bath employed comprising up to 25 grams/ litre of sulphuric acid, and at least 50 grams per litre of sodium sulphate.

2. Process for the production of viscose rayon suitable for the production of staple fibre which comprises spinning viscose prepared from cellulose pulp having a degree of polymerisation of 700 to 800, without ripening the alkali-cellulose and without ageing of the viscose, the viscose having a cellulose content of 4% to 8% and a caustic soda content of between 3% and a viscosity ot at least 300 poises, and a gamma higher than 70, the coagulating bath employed comprising up to grams/- litre of sulphuric acid, and at least 80 grams per litre of sodium sulphate. 1

3. Process for the production of viscose rayon suitable for the production of staple fibre which comprises spinning viscose prepared from cellulose pulp having a degree of polymerisation of 700 to 800, without ripening the alkali-cellulose and without ageing of the viscose, the viscose having a cellulose content of 4% to 8% and a caustic soda content of between 3% to 5%, a viscosity of at least 300 poises, and a gamma higher than 70, the coagulating bath employed comprising up to grams/- litre of sulphuric acid, and at least grams per litre of sodium sulphate, the viscose being spun vertically upwards from a horizontal spinneret.

4. Process for the production of viscose rayon suitable for the production of staple fibre which comprises spinning viscose prepared from cellulose pulp having a degree of polymerisation of 700 to 800, without ripening the alkali-cellulose and, without ageing of the viscose, the viscose having a cellulose content of 4% to 8% and a caustic soda content of between 3% and 5%, a viscosity of atlea s t 300 poises, and a gamma higher than 70, the coagulating bath employed comprising up to 30 grams/- litre of sulphuric acid, and at least 50 grams per litre of sodium .sulphate, and subjecting the spun filamentary products to high stretch continuously with their productron.

5. Process for the production of viscose rayon suitable for the production of staple fibre which comprises spinning viscose prepared from cellulose pulp having a degree of polymerisation of 700 to 800, without ripening the alkali-cellulose and without ageing of the viscose, the viscose having a cellulose content of 4% to 8% and a caustic soda content of between 3% and 5%, a viscosity of at least 300 poises, and a gamma higher than 70, the

coagulating bath employed comprising up to 30 grams/- litre of sulphuric acid, and at least 50 grams per litre of sodium sulphate, and converting the spun filamentary products to staple fibre.

6. Process for the production of viscose rayon suitable for the production of staple fibre which comprises spinning viscose prepared from cellulose pulp having a degree of polymerisation of 700 to 800, without ripening the alkali-cellulose and without ageing of the viscose, the viscose having a cellulose content of 4% to 8% and a caustic soda content of between 3% and 5%, a viscosity of at least 300 poises, and a gamma higher than 70, the coagulating bath employed comprising up to 30 grams/- litre of sulphuric acid, and at least grams per litre of sodium sulphate, the viscose being spun vertically upwards from a horizontal spinneret.

7. Process for the production of viscose rayon suitable for the production of staple fibre which comprises spinning viscose prepared from cellulose pulp having a degree of polymerisation of 700 to 800, without ripening the alhall-cellulose and without ageing of the viscose, the vis- 'cose having a cellulose content of'4% to 8% and a caustic soda content of between 3% and 5%, a viscosity of at least 300 poises, and a gamma higher than 70, the coagulating bath employed comprising up to 30 grams/litre of sulphuric acid, and at least 50 grams per litre of sodium sulphate, the viscose being spun vertically upwards from a horizontal spinneret, and subieeting the spun filamentary products to high stretch continuously with their production.

8. Process for the production of viscose rayon suitable for the production of staple fibre which comprises spinning viscose prepared from cellulose pulp having a degree of polymerisation of 700 to 800, without ripening the alkali-cellulose and without ageing of the viscose, the viscose having a cellulose content of 4% to 8% and n caustic soda content of between 3% and 5%. a viscosity of at least 300 poises, and a gamma higher than 70, the coagulating bath employed comprising up to 30 grams/- litre of sulphuric acid. and at least 50 grams per litre of sodium sulphate, and subjecting the spun filamentary products to high stretch continuously with their production. and converting the spun filamentary products to staple fibres.

References Cited in the file of this patent UNlTED STATES PATENTS Drisch et al June 13, 1950 Drisch et al. Aug. 26, 1952 OTHER REFERENCES

Claims (1)

1. PROCESS FOR THE PRODUCTION OF VISCOSE RAYON SUITABLE FOR THE PRODUCTION OF STAPLE FIBRE WHICH COMPRISES SPINNING VISCOSE PREPARED FROM CELLULOSE PULP HAVING A DEGREE OF POLYMERISATION OF 700 MINIMUM, WITHOUT RIPENING THE ALKALI-CELLULOSE AND WITHOUT AGEING OF THE VISCOSE, THE VISCOSE HAVING A VISCOSITY OF AT LEAST 300 POISES, AND A GAMMA HIGHER THAN 70, THE COAGULATING BATH EMPLOYED COMPRISING UP TO 25 GRAMS/LITRE OF SULPHURIC ACID, AND AT LEAST 50 GRAMS PER LITRE OF SODIUM SULPHATE.
US2705184A 1949-08-25 1952-07-03 Process for the production of rayon products Expired - Lifetime US2705184A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
FR993756T 1949-08-25
FR63131T 1952-01-15
NL757521X 1952-12-04

Publications (1)

Publication Number Publication Date
US2705184A true US2705184A (en) 1955-03-29

Family

ID=32302966

Family Applications (2)

Application Number Title Priority Date Filing Date
US2607955A Expired - Lifetime US2607955A (en) 1949-08-25 1950-11-02 Spinning of viscose
US2705184A Expired - Lifetime US2705184A (en) 1949-08-25 1952-07-03 Process for the production of rayon products

Family Applications Before (1)

Application Number Title Priority Date Filing Date
US2607955A Expired - Lifetime US2607955A (en) 1949-08-25 1950-11-02 Spinning of viscose

Country Status (6)

Country Link
US (2) US2607955A (en)
BE (2) BE516903A (en)
DE (2) DE969389C (en)
FR (3) FR993756A (en)
GB (3) GB685631A (en)
NL (2) NL103223C (en)

Cited By (32)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2847272A (en) * 1953-06-25 1958-08-12 Courtaulds Ltd Production of artificial filaments, threads and the like
US2893821A (en) * 1955-09-03 1959-07-07 American Enka Corp Production of yarns of regenerated cellulose having improved properties
US2895787A (en) * 1954-12-30 1959-07-21 American Viscose Corp Process of producing all skin rayon
US2895788A (en) * 1954-12-30 1959-07-21 American Viscose Corp Method of forming all skin viscose rayon
US2898182A (en) * 1954-12-30 1959-08-04 American Viscose Corp Method of preparing viscose rayon
US2914414A (en) * 1954-03-08 1959-11-24 Ohio Commw Eng Co Shaped articles comprising regenerated cellulose
US2919203A (en) * 1955-12-05 1959-12-29 American Viscose Corp Producing all skin rayon
US2920973A (en) * 1956-04-23 1960-01-12 American Viscose Corp Preparing viscose rayon
US2926099A (en) * 1955-12-05 1960-02-23 American Viscose Corp Preparing all skin viscose rayon
US2929730A (en) * 1955-12-05 1960-03-22 American Viscose Corp Preparing viscose rayon
US2932578A (en) * 1955-12-05 1960-04-12 American Viscose Corp Method of producing all skin rayon
US2940818A (en) * 1954-11-25 1960-06-14 American Enka Corp Production of shaped objects from viscose
US2953426A (en) * 1954-11-25 1960-09-20 American Enka Corp Production of shaped objects from viscose
US2953425A (en) * 1954-11-25 1960-09-20 American Enka Corp Production of shaped objects from viscose
US2958569A (en) * 1954-10-20 1960-11-01 American Enka Corp Production of threads and other shaped objects from viscose
US2960385A (en) * 1957-10-16 1960-11-15 Du Pont Extruding a ferrocyanide containing viscose into a nickel salt containing bath
US2974004A (en) * 1954-11-25 1961-03-07 American Enka Corp Production of shaped objects from viscose
US2986446A (en) * 1956-08-01 1961-05-30 Courtaulds Ltd Crimped regenerated cellulose fibres
US2989798A (en) * 1955-06-30 1961-06-27 Du Pont Filaments of improved dye-receptivity
US3026170A (en) * 1957-11-29 1962-03-20 American Enka Corp Manufacture of viscose rayon
US3031320A (en) * 1955-08-22 1962-04-24 Atlas Chem Ind Spinning of viscose
US3049398A (en) * 1955-12-05 1962-08-14 American Viscose Corp Method of producing all skin rayon
US3057038A (en) * 1957-06-05 1962-10-09 Celanese Corp Wet spun cellulose triacetate
US3077375A (en) * 1955-08-22 1963-02-12 Atlas Chem Ind Spinning of viscose
US3107970A (en) * 1960-10-04 1963-10-22 Toho Rayon Kk Process for the manufacture of high tenacity viscose rayon
US3116354A (en) * 1957-05-02 1963-12-31 Beaunit Corp Viscose spinning process
US3116352A (en) * 1957-05-02 1963-12-31 Beaunit Corp Viscose spinning
US3116353A (en) * 1957-05-02 1963-12-31 Beaunit Corp Spinning viscose
US3126435A (en) * 1956-07-25 1964-03-24 Production of regenerated cellulose
US3139467A (en) * 1962-11-14 1964-06-30 Chimiotex Method for spinning viscose
US3352957A (en) * 1962-11-06 1967-11-14 Chimiotex Process for spinning cellulosic fibers
US3875141A (en) * 1968-02-16 1975-04-01 Chimiotex Regenerated cellulose filaments

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE497545A (en) * 1949-08-25
US2592355A (en) * 1949-11-21 1952-04-08 Tachikawa Shozo Process for manufacturing macromolecular cellulose fiber
BE513218A (en) * 1951-07-31
US2732279A (en) * 1951-12-07 1956-01-24 Shozo tachikawa
US2952508A (en) * 1953-09-16 1960-09-13 Rayonier Inc Viscose process and products produced thereby
US2937922A (en) * 1954-03-24 1960-05-24 Rayonier Inc Viscose process
DE1071277B (en) * 1957-12-26
US3274321A (en) * 1961-03-28 1966-09-20 Fmc Corp Method of making clear cellulose films from green viscose
BE632439A (en) * 1962-05-16
US3154614A (en) * 1962-06-27 1964-10-27 Tachikawa Res Inst Process for spinning a high viscosity, high gamma viscose
WO2010071906A1 (en) 2008-12-23 2010-07-01 Lenzing Ag Cellulose molded bodies having non-circular cross-sections and the use thereof in composite materials
EP2759624A1 (en) 2013-01-29 2014-07-30 Continental Reifen Deutschland GmbH Reinforcing ply for objects made of elastomer material, preferably for pneumatic vehicle tires and pneumatic vehicle tires
CN105102701B (en) * 2013-01-29 2017-10-03 可丹卡有限及两合公司 High tenacity viscose rayon multifilament yarn having a yarn linear low density
CN104968847B (en) 2013-01-29 2017-09-26 大陆轮胎德国有限公司 For articles made from elastomeric material, preferably a pneumatic tire for a vehicle and a vehicle pneumatic tire reinforcing layer
EP2781367B1 (en) 2013-03-18 2016-12-14 Continental Reifen Deutschland GmbH Reinforcing ply for objects made of elastomer material, preferably for pneumatic vehicle tires and pneumatic vehicle tire
EP2781633A1 (en) 2013-03-18 2014-09-24 Continental Reifen Deutschland GmbH Hybrid cord of at least two mutually twisted multifilament yarns

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2511699A (en) * 1947-11-10 1950-06-13 Comptoir Textiles Artificiels Method for spinning viscose
US2607955A (en) * 1949-08-25 1952-08-26 Textile & Chem Res Co Ltd Spinning of viscose

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR518451A (en) * 1918-07-22 1921-05-26 Glanzfaden Actiengesellschaft Process for producing thin artificial son using cellulose solutions
DE405443C (en) * 1918-07-22 1924-10-31 Glanzfaeden A G A process for the production of artificial, very fine filaments of cellulose solutions
DE492279C (en) * 1922-09-19 1930-09-18 Benno Borzykowski A process for the production of fine viscose Kunstfaeden
NL97400B (en) * 1939-03-30 1943-09-15
US2327516A (en) * 1939-07-22 1943-08-24 Fink Heinrich Manufacture of artificial filaments and fibers from viscose
BE446669A (en) * 1941-08-01

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2511699A (en) * 1947-11-10 1950-06-13 Comptoir Textiles Artificiels Method for spinning viscose
US2607955A (en) * 1949-08-25 1952-08-26 Textile & Chem Res Co Ltd Spinning of viscose

Cited By (32)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2847272A (en) * 1953-06-25 1958-08-12 Courtaulds Ltd Production of artificial filaments, threads and the like
US2914414A (en) * 1954-03-08 1959-11-24 Ohio Commw Eng Co Shaped articles comprising regenerated cellulose
US2958569A (en) * 1954-10-20 1960-11-01 American Enka Corp Production of threads and other shaped objects from viscose
US2940818A (en) * 1954-11-25 1960-06-14 American Enka Corp Production of shaped objects from viscose
US2953425A (en) * 1954-11-25 1960-09-20 American Enka Corp Production of shaped objects from viscose
US2953426A (en) * 1954-11-25 1960-09-20 American Enka Corp Production of shaped objects from viscose
US2974004A (en) * 1954-11-25 1961-03-07 American Enka Corp Production of shaped objects from viscose
US2895787A (en) * 1954-12-30 1959-07-21 American Viscose Corp Process of producing all skin rayon
US2898182A (en) * 1954-12-30 1959-08-04 American Viscose Corp Method of preparing viscose rayon
US2895788A (en) * 1954-12-30 1959-07-21 American Viscose Corp Method of forming all skin viscose rayon
US2989798A (en) * 1955-06-30 1961-06-27 Du Pont Filaments of improved dye-receptivity
US3031320A (en) * 1955-08-22 1962-04-24 Atlas Chem Ind Spinning of viscose
US3077375A (en) * 1955-08-22 1963-02-12 Atlas Chem Ind Spinning of viscose
US2893821A (en) * 1955-09-03 1959-07-07 American Enka Corp Production of yarns of regenerated cellulose having improved properties
US3049398A (en) * 1955-12-05 1962-08-14 American Viscose Corp Method of producing all skin rayon
US2919203A (en) * 1955-12-05 1959-12-29 American Viscose Corp Producing all skin rayon
US2932578A (en) * 1955-12-05 1960-04-12 American Viscose Corp Method of producing all skin rayon
US2929730A (en) * 1955-12-05 1960-03-22 American Viscose Corp Preparing viscose rayon
US2926099A (en) * 1955-12-05 1960-02-23 American Viscose Corp Preparing all skin viscose rayon
US2920973A (en) * 1956-04-23 1960-01-12 American Viscose Corp Preparing viscose rayon
US3126435A (en) * 1956-07-25 1964-03-24 Production of regenerated cellulose
US2986446A (en) * 1956-08-01 1961-05-30 Courtaulds Ltd Crimped regenerated cellulose fibres
US3116353A (en) * 1957-05-02 1963-12-31 Beaunit Corp Spinning viscose
US3116354A (en) * 1957-05-02 1963-12-31 Beaunit Corp Viscose spinning process
US3116352A (en) * 1957-05-02 1963-12-31 Beaunit Corp Viscose spinning
US3057038A (en) * 1957-06-05 1962-10-09 Celanese Corp Wet spun cellulose triacetate
US2960385A (en) * 1957-10-16 1960-11-15 Du Pont Extruding a ferrocyanide containing viscose into a nickel salt containing bath
US3026170A (en) * 1957-11-29 1962-03-20 American Enka Corp Manufacture of viscose rayon
US3107970A (en) * 1960-10-04 1963-10-22 Toho Rayon Kk Process for the manufacture of high tenacity viscose rayon
US3352957A (en) * 1962-11-06 1967-11-14 Chimiotex Process for spinning cellulosic fibers
US3139467A (en) * 1962-11-14 1964-06-30 Chimiotex Method for spinning viscose
US3875141A (en) * 1968-02-16 1975-04-01 Chimiotex Regenerated cellulose filaments

Also Published As

Publication number Publication date Type
DE969389C (en) 1958-05-29 grant
US2607955A (en) 1952-08-26 grant
NL92810C (en) grant
DE1047371B (en) 1958-12-24 application
BE497545A (en) grant
FR60194E (en) 1954-09-23 grant
FR993756A (en) 1951-11-07 grant
NL103223C (en) grant
BE516903A (en) grant
GB757521A (en) 1956-09-19 application
GB711642A (en) 1954-07-07 application
GB685631A (en) 1953-01-07 application
FR63131E (en) 1955-08-24 grant

Similar Documents

Publication Publication Date Title
US2637321A (en) Shaped article and method of producing it
US4289824A (en) High fluid-holding alloy rayon fiber mass
US5417752A (en) Product containing silicon dioxide and a method for its preparation
US5403530A (en) Elongate member production method
US2423707A (en) Fabric or gauze of uniformly oxidized cellulose
US3655853A (en) Process for producing polytetrafluoroethylene filaments
US2535044A (en) Spinning of viscose
US3337671A (en) Method of making regenerated cellulose filaments
US2572936A (en) Process for making crimped artificial filaments
US3455713A (en) Flame-retardant regenerated cellulose
US3626045A (en) Process for making tubular filaments
US3351696A (en) Method for producing regenerated cellulose products
US6527987B1 (en) Process for producing regenerated cellulosic fibers
US2312152A (en) Rayon and method of manufacturing same
US4242405A (en) Viscose rayon and method of making same
US3341645A (en) Method of producing viscose rayon staple and a spinning apparatus for use in the method
US3139467A (en) Method for spinning viscose
US2852333A (en) Viscose spinning process
US3266918A (en) Viscose solutions for making flame retardant rayon
US3720743A (en) Process for producing high performance crimped rayon staple fiber
CN1544726A (en) High-performance cellulose viscose and process for making same
US2284028A (en) Dry spinning process
US2852334A (en) Method of producing viscose rayon
US2262872A (en) Method of preparing textile materials
US3875141A (en) Regenerated cellulose filaments