US798027A - Process of manufacturing filaments from viscose. - Google Patents

Process of manufacturing filaments from viscose. Download PDF

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Publication number
US798027A
US798027A US25666905A US1905256669A US798027A US 798027 A US798027 A US 798027A US 25666905 A US25666905 A US 25666905A US 1905256669 A US1905256669 A US 1905256669A US 798027 A US798027 A US 798027A
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Prior art keywords
viscose
filaments
bath
bicarbonate
setting
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US25666905A
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Charles A Ernst
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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

  • the free or surplus caustic alkali of the viscose is rapidly removed to the desired extent by the unsatisfied carbonic acid of the bicarbonate, the action of the ammonium sulfate being to coagulate the viscose.
  • the filaments which have been set by a solution of the above-described character and spun in the usual manner are then reverted, preferably, by means of a solution of ammonium sulfate. Thereafter the usual washing and drying processes are employed.

Description

UNITED STATES I A TENT OFFICE.
CHARLES A. ERNST, OF LANSDOWNE, PENNSYLVANIA.
Specification of Letters Patent.
Patented Aug. 22, 1905.
Application filed April 20, 1905. Serial No. 256,669-
lo a whom it may concern.-
Be it known that I, CHARLEs A. ERNST, of Lansdowne, in the county of Delaware and State of Pennsylvania, have invented certain new and useful Improvements in the Process of Manufacturing Filaments from Viscose, of which the following is a specification.
In processes of this character it is a common practice to employ an acid solution for the bath in which the primary setting of the viscose filament as it issues from the spinneret is effected. It has been found, however, that the use of an acid-bath tends to weaken the product whenever the filaments while still moist with the acid solution are exposed to the air for any considerable length of time, the weakening effect being more and more marked in accordance with the strength of the acid.
It is, however, desirable to eliminate the free or surplus alkali from the viscose at the primary step of the operation (usually referred to under the term sett-ing) in order to prevent the filaments from cementing together. I have found that the removal of the alkali may be accomplished with sufficient rapidity for the purpose of the setting-bath by the use of a proper alkaline reagent and that by this method the weakening which results from protracted exposure to the atmosphere after treatment by an acid setting reagent is avoided. To this end I employ as a setting-bath a solution of an alkaline salt or salts of such character as to take up to the desired extent the free or surplus alkali contained in the viscose filaments without, however, developing any deleterious reactions. I preferably employ a bath formed of an aqueous solution of bicarbonate of soda and bicarbonate of ammonia, together with ammonium sulfate. Preferably this solution is saturated with all these ingredients at ordinary temperature.
The free or surplus caustic alkali of the viscose is rapidly removed to the desired extent by the unsatisfied carbonic acid of the bicarbonate, the action of the ammonium sulfate being to coagulate the viscose.
The filaments which have been set by a solution of the above-described character and spun in the usual manner are then reverted, preferably, by means of a solution of ammonium sulfate. Thereafter the usual washing and drying processes are employed.
Having thus described my invention, I claim- 1. The hereinbefore-described process of setting viscose filaments which consists in immersing them in a bath of an alkaline bicarbonate.
2. The hereinbefore-described process of setting viscose filaments which consists in immersing them in a bath containing an alkaline bicarbonate and a coagulating reagent.
3. The hereinbefore-described process of setting viscose filaments which consists in immersing them in a bath containing bicarbonate of soda and bicarbonate of ammonia in conjunction with ammonium sulfate.
In witness whereof I have hereunto signed my name, at Philadelphia, in the State of Pennsylvania, this 19th day of April, 1905.
CHARLES A. ERNST.
Witnesses:
JAMES H. BELL, ANNA F. GETZFREAD.
US25666905A 1905-04-20 1905-04-20 Process of manufacturing filaments from viscose. Expired - Lifetime US798027A (en)

Priority Applications (1)

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US25666905A US798027A (en) 1905-04-20 1905-04-20 Process of manufacturing filaments from viscose.

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US25666905A US798027A (en) 1905-04-20 1905-04-20 Process of manufacturing filaments from viscose.

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2447757A (en) * 1938-07-06 1948-08-24 Antonie Lilienfeld Process for treating cellulose ethers to improve their dissolving properties
US20080286447A1 (en) * 2005-08-12 2008-11-20 Cambrios Technologies Corporation Nanowires-based transparent conductors

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2447757A (en) * 1938-07-06 1948-08-24 Antonie Lilienfeld Process for treating cellulose ethers to improve their dissolving properties
US20080286447A1 (en) * 2005-08-12 2008-11-20 Cambrios Technologies Corporation Nanowires-based transparent conductors
US20080283799A1 (en) * 2005-08-12 2008-11-20 Cambrios Technologies Corporation Nanowires-based transparent conductors
US8865027B2 (en) 2005-08-12 2014-10-21 Cambrios Technologies Corporation Nanowires-based transparent conductors
US9899123B2 (en) 2005-08-12 2018-02-20 Jonathan S. Alden Nanowires-based transparent conductors

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