US1814542A - Manufacture of viscose - Google Patents

Manufacture of viscose Download PDF

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Publication number
US1814542A
US1814542A US115478A US11547826A US1814542A US 1814542 A US1814542 A US 1814542A US 115478 A US115478 A US 115478A US 11547826 A US11547826 A US 11547826A US 1814542 A US1814542 A US 1814542A
Authority
US
United States
Prior art keywords
liquor
steeping
sheets
hemi
raw material
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
US115478A
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English (en)
Inventor
Galo W Blanco
Henningsen Carleton
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.)
DuPont Rayon Co
Original Assignee
DuPont Rayon 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
Priority to BE342819D priority Critical patent/BE342819A/xx
Application filed by DuPont Rayon Co filed Critical DuPont Rayon Co
Priority to US115478A priority patent/US1814542A/en
Priority to GB13806/27A priority patent/GB272475A/en
Priority to FR635408D priority patent/FR635408A/fr
Priority to US231089A priority patent/US1814543A/en
Application granted granted Critical
Publication of US1814542A publication Critical patent/US1814542A/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
    • D01F2/06—Monocomponent artificial filaments or the like of cellulose or cellulose derivatives; Manufacture thereof from viscose
    • D01F2/08—Composition of the spinning solution or the bath

Definitions

  • one of the objects of our invention is to provide a method and a means which shallavoid the necessity of adopting such expensive methods as referred to above and which shall at the same time permit the reuse of 100% of the caustic'liquor which has formerly been wasted.
  • Another object of our invention is to provide novel and improved means which shall permit the use of a steeping caustic containing relatively high percentages of hemi-celluloses and which shall thus avoid the necessity of wasting such a'large amount of steeping liquor.
  • Another object achieved by our invention the steeping.
  • Fi re 1 is a diagrammatic plan view showing a steeping press, the tank being shown in section.
  • Figures 2 to 5 inclusive show various means by which our invention maybe practiced.
  • Figure 6 is a section on the line 6--6 of Figure 5.
  • the numeral 1 designates the steeping tank of the press in which the raw material, in this case sheets of wood pulp, is deposited for treat ment by a bath of caustic solution.
  • the sheets of pulp are designatedv 2 and are arranged on edge between perforated iron plates 3, which a hold the sheets upright.
  • perforated iron plates 3 which a hold the sheets upright.
  • rom five to twenty sheets of pulp are usually placed in a compartment formed between two plates and the number of compartments isdetermined by the size of the particular" apparatus hundred.
  • T e object of the iron plates is to. hold the pulp sheets upright and allow drainage of the. liquor.
  • the caustic solution is supplied. from the" make-up tank 4 and the flow to the press 1 is controlled by the valve 5.
  • An outlet 6 is provided from the other end'of the tank and this outlet is provided with a'connection 7 leading back to the make-up tank 4 and concontrolled by a valve 8, and also with a connection 9 through which the solution ma be wasted, this connection being controlled by the valve 10.
  • Slidably mounted in one end of the tank 1 is a piston rod 11 having a head 12 contacting with the contents of the press. The rod may be operated by any suitable 'means to compress the pulp.
  • the cut-ofl has been determined by the amount of hemi-cellulose contentwhich it has been possibleto meri the -stee ing liquor without producingthepnde-
  • the areas referred to above form on those'portions of the pulp sheets which do not have free 00-, cess to the caustic solution.
  • The'pulp absorbs. the caustic soda solution with great rapidity.
  • This swelling tends to press the sheets more closely together and tends to make the access of the solution between and into the sheets more difii'cult.
  • the steeping process may be carried on in the old manner and hemi-celluloses may be introduced indedependently of the steeping operation.
  • the corrugations may be arranged as desired but we have found that, when they are arranged diagonally to each edge of the sheet as indicated at 13 in Figure 2, the best results are obtained. If the'corrugations are arranged horizontally as shown at 14 in Figure 3, excellent results are also was; thetime necessar to ripen the v scose is to obtained. If the corrugationsare arranged vertically as shown a't'1'5 in Figure 4, good results are also obtained, although not so good as when they are arrangedas shown in Figures 2 and 3.
  • FIG. 5 and 6 Another means is indicated in Figures 5 and 6 wherein isshown a plurality of dimples 16 formed b running the sheets through a suitable mac ine.
  • the corrugations or, other means used in place thereof will temporarily hold the! sheets in position so that the router portions thereof will be exposed to t e action of the steeping liquor.
  • the steeping li iluor is then-permitted to enter the press. I liquor comes in contact therewith, but the he sheets swell rapidly as the means which we employ permit the liquor to come into contact. with all portions of the sheets .and thoroughly saturate. them before they swell and come in contact with one another throughout their surfaces.
  • the piston then is actuated to ress the material and to extract therefrom t e excess liquor, all the liquor thus extracted being returned to the make-up tank for reuse.
  • WVhile we have referred to the raw material. as'being made of wood pulp, it is obvious that our invention may be practiced with any other kind of raw material to which it is expressable. We are aware that various modications and changes may be made in the practice of ourinvention as disclosed in this application and without departing from the scope of our invention. we there ore do not intend to limit our except by the'appendedclaims.
  • steps which comprise placing sheets of raw material in a steeping press and with the greater portions of said sheets out of contact with one another to permit freepassage' of the steeping liquor'to all portions thereof, steeping saidoraw material in l iquor,press'ing said raw material to extract'the excess liquor therefrom, and reusing said liquor to: steep other raw material.
  • the step which comprises wetting sheets of raw material with a steeping liquor while holding the greater-portions of the sheets out of contact with one another to permit free. passage of the steeping liquor to substantially all portions thereof.
  • the method ofma-nufacturing viscose the step which comprises wetting sheets of raw material with a steeping liquor containing approximately 3 of hemi-cellulose while maintaining the greater portions 'of the sheet-sout of contact with one another to permit free'passage of the steeping liquor to substantially all portions thereof.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Polysaccharides And Polysaccharide Derivatives (AREA)
  • Laminated Bodies (AREA)
US115478A 1926-06-12 1926-06-12 Manufacture of viscose Expired - Lifetime US1814542A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
BE342819D BE342819A (enrdf_load_html_response) 1926-06-12
US115478A US1814542A (en) 1926-06-12 1926-06-12 Manufacture of viscose
GB13806/27A GB272475A (en) 1926-06-12 1927-05-23 Improvement in manufacture of viscose
FR635408D FR635408A (fr) 1926-06-12 1927-06-01 Perfectionnement à la fabrication de la viscose
US231089A US1814543A (en) 1926-06-12 1927-11-04 Manufacture of viscose

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US115478A US1814542A (en) 1926-06-12 1926-06-12 Manufacture of viscose

Publications (1)

Publication Number Publication Date
US1814542A true US1814542A (en) 1931-07-14

Family

ID=22361659

Family Applications (1)

Application Number Title Priority Date Filing Date
US115478A Expired - Lifetime US1814542A (en) 1926-06-12 1926-06-12 Manufacture of viscose

Country Status (4)

Country Link
US (1) US1814542A (enrdf_load_html_response)
BE (1) BE342819A (enrdf_load_html_response)
FR (1) FR635408A (enrdf_load_html_response)
GB (1) GB272475A (enrdf_load_html_response)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2608151A (en) * 1944-03-08 1952-08-26 Textile & Chem Res Co Ltd Steeping press
CN115161791A (zh) * 2021-04-07 2022-10-11 河北吉藁化纤有限责任公司 一种竹本色浆纤维的制备方法及纤维

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2608151A (en) * 1944-03-08 1952-08-26 Textile & Chem Res Co Ltd Steeping press
CN115161791A (zh) * 2021-04-07 2022-10-11 河北吉藁化纤有限责任公司 一种竹本色浆纤维的制备方法及纤维

Also Published As

Publication number Publication date
BE342819A (enrdf_load_html_response)
GB272475A (en) 1928-09-24
FR635408A (fr) 1928-03-15

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