US2315559A - Process of spinning viscose - Google Patents

Process of spinning viscose Download PDF

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Publication number
US2315559A
US2315559A US279360A US27936039A US2315559A US 2315559 A US2315559 A US 2315559A US 279360 A US279360 A US 279360A US 27936039 A US27936039 A US 27936039A US 2315559 A US2315559 A US 2315559A
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US
United States
Prior art keywords
bath
viscose
orifices
spin
yarn
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
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US279360A
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English (en)
Inventor
Stoeckly Johann Joseph
Linnhoff Wolfgang
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.)
North American Rayon Corp
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North American Rayon Corp
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Filing date
Publication date
Application filed by North American Rayon Corp filed Critical North American Rayon Corp
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Publication of US2315559A publication Critical patent/US2315559A/en
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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

Definitions

  • the present invention relates to a process of producing high-strength filaments, threads, yarns, etc., from viscose solutions.
  • the primary object of this invention relates to a process of projecting viscose solutions into a spin bath containing a soluble iron salt besides conventional bath ingredients.
  • Another object of this invention relates to a process of extruding a viscose solution into an acid spin bath containing iron sulphate to produce yarns having improved tensile strength, toughness and elasticity.
  • a further object of this invention has to do with a viscose spinning process which comprises extruding a viscose solution into a primary, acid spin bath containing a soluble iron salt and stretching the filaments, threads. yarns, etc., thus formed in a secondary bath maintained at an elevated temperature.
  • such zinc-bearing baths are deficient in that they impart to regenerated cellulose a high strength in dry and wet condition.
  • the final thread will have less strength'than threads of regenerated cellulose obtained in ac-
  • the beneficial effect of iron in the. primary bath is bound to the stretching in the hot, secondary bath. This effect becomes noticeable at a temperature of about C. and pronounced at a temperature of about C.
  • the secondary bath may have a temperature of and attain even the boiling point of water.
  • iron salts such as iron sulphate, iron nitrate, iron nitrite, ferrous ammonium sulphate, ferric ammonium sulphate, etc.
  • iron in the primary bath hasthe property of promoting the stretching in a hot, secondary bath, this stretching resulting in especially strong end products.
  • spin baths containing soluble iron salts, especially iron sulphate reduce the clogging of spinneret orifices in comparison with Zinc-bearing spin baths.
  • This reduction in clogging of spinneret orifices results in a reduction of spinneret change during the production of viscose products.
  • acid spin baths containing about '50' grams of zinc sulphate per meshe used a con-' I siderable clogging of the orifices of noble metal to 30% by the formation of so-called zinc rings?
  • Example A conventional viscose solution containing about 7.2% cellulose and 6.5% alkali and ma-- tured to 125 (H), is spun into a primary spin" bath at a temperature of about 50 C. The bath travel is about 20 cm. The primary bath ,con-
  • the secondary bath may consist of pure water or it may contain small amounts of the ingredients of Y the primary bath. These ingredients may be carried over by the thread from the primary to the secondary bath.
  • the thread thus produced has the following physical characteristics:
  • steps which comprise projecting a viscose solution through minute orifices of a metal spin-' neret into an acid coagulating bath devoid'oi zinc and containing a soluble iron salt in anamount'suificient to delay the decomposition to cellulose hydrate and then stretching the yarn about 80% while subjecting the yarn being stretched to the action of an aqueous heatins liquid at a temperature above 60 0.
  • steps which comprise projecting the spinning solution through minute orifices of a metal spinneret into an acid coagulating bath devoid of ZIJC and containing a soluble iron salt in an amount suificient to delay the decomposition to cellulose hydrate and then stretching, the freshly spun yarn while subjecting the yarn being stretchedto the action of an aqueous heating liquid at a temperature above 60 C., whereby incrustatiomof the orifices of said spinneret is substantially inhibited.
  • steps which comprise projecting the spinning. solution through minute orifices of a metal spin neret into an acid coagulating bath devoid of zinc and containing from about v15 to g. of a soluble iron salt per liter of bath and then stretching the freshly spun yarn while subjecting the yarn being stretched to the action of an aqueous heating liquid at a temperature above 0., whereby inprustation of the orifices of st id spinneret is substantially inhibited- 3.
  • steps which comprise projecting the spinning. solution through minute orifices of a metal spin neret into an acid coagulating bath devoid of zinc and containing from about v15 to g. of a soluble iron salt per liter of bath and then stretching the freshly spun yarn while subjecting the yarn being stretched to the action of an aqueous heating liquid at a temperature above 0., whereby inprustation of the orifices of st id spinneret is substantially inhibited- 3.
  • the spinning viscose rayon the
  • neret is substantially inhibited.
  • steps which comprise projecting the spinnin zinc and containing from about 15 to 50g. of a soluble iron salt per liter of bath and then stretching the freshly spun yarn while s,ubJect-' -ing the yarn being'stretched to the action of water at a temperature above 60 C., whereby incrustation of the orifices of said spinneret is substantially inhibited.
  • a process of spinning viscose rayon the steps which comprise projecting the spinning solution through minute orifices of a metal spinneret into an acid coagulating bath devoid of zinc and then stretching the freshly spun yarn while subjecting the yarn being stretched to the action of water at a temperature above 60 C., said coagulating bath containing about 125 g. of sulphuric acid, about 260 g. of sodium sulphate and about 50 g. of iron sulphate per liter of water, whereby incrustation of the orifices of said spinneret is substantially inhibited.
  • steps which comprise projecting a viscose solution through minute orifices of a metal spinneret into an acid coagulating bath devoid of zinc and containing a soluble iron salt in an amount suiilcient to delay the decomposition to cellulose hydrate and then stretching the yarn about 80% while subjecting the yarn being stretched to the action of water at a temperature above 0., whereby incrustation of the orifices of said spinneret is substantially inhibited.
  • steps which comprise projecting a viscose solution through minute orifices of a metal spinneret into an acid coagulating bath devoid of zinc and containing iron sulphate in an amount sufficient to delay the decomposition to cellulose hydrate and then stretching the yarn about while subjecting the yarn being stretched to the action of water at a. temperature above 60 (1., whereby incrustation of the orifices of said spinneret is substantially inhibited.
  • sulphuric acid at least 15 g. of a soluble iron salt and about 260 g. of sodium sulphate per liter of water, said bath being devoid of zinc.
  • a viscose spin bath containing about 125 g. of sulphuric acid, at least 15 g. of iron sulphate and about 260 g. of sodium sulphate per liter of water, said bath being devoid of zinc.
  • a viscose spin bath containing about 125 g. of sulphuric acid, about 50 g. of a soluble iron salt and about 260 g. of sodium sulphate per liter of water, said bath being devoid of zinc.
  • a viscose spin bath containing sulphuric acid, sodium sulphate and at least 15 grams of a soluble iron .salt per liter of water, said bath being devoid of zinc.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Artificial Filaments (AREA)
US279360A 1938-06-16 1939-06-15 Process of spinning viscose Expired - Lifetime US2315559A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE530129X 1938-06-16

Publications (1)

Publication Number Publication Date
US2315559A true US2315559A (en) 1943-04-06

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ID=6554367

Family Applications (1)

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US279360A Expired - Lifetime US2315559A (en) 1938-06-16 1939-06-15 Process of spinning viscose

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US (1) US2315559A (en(2012))
GB (1) GB530129A (en(2012))
NL (1) NL50229C (en(2012))

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Publication number Publication date
GB530129A (en) 1940-12-05
NL50229C (en(2012))

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