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
  • D01F2/10—Addition to the spinning solution or spinning bath of substances which exert their effect equally well in either

Definitions

• the present invention relates to a viscose solution suitable for the manufacture of .viscose thread, and more particularly to the production of a high tenacity, highly fatigue resistant, viscose thread that is particularly adapted for use as a reinforcing material for cord tires, and for other industrial uses.
• viscose can be used which contains 78% by weight of cellulose and 6% or slightly higher by weight of alkali.
• the quinoline content is preferably maintained between 0.075 and 0.15% based on the weight of the viscose.
• Such small quantities have been found to completely dissolve in the viscose; whereas when amounts are used exceeding 0.2% by weight based on the viscose, the solubility limit is reached and an emulsion starts to form, and incidentally, the spinning conditions become unsatisfactory.
• the quinoline can be added during any of the viscose manufacturing steps, e.g., it can be added to the pulp or to the alkali solution or to the cellulose xanthate.
• the temperature of the coagulating bath is maintained between 60 C. and C., and preferably about 70 C.; also, a relatively long thread immersion'is used in the coagulating bath, e.g. an immersion of at least 40 cm., and in fact favorable results have been obtained by using immersion distances up to 70 cm. and more depending upon the spinning velocity and the calculated filament denier duringthe immersion traject, e.g. with a filament denier of 3m the bath; optimum results were obtained when the thread remained in the bath for about 1 /2 seconds.
• the threads After the threads have been formed in the coagulating bath, they can be stretched by means of godets and the like inany of the well known systems, and aftertreated either according to the continuous system or the discontinuous system.
• the stretching should be at least 70% and may take placein an air zone or in one or more .hot aqueous stretching baths. containing, if desirable, small amounts of sulphuric acid.
• the threads may be slashed invany well known manner for further lowering the elongation.
• the threads may be stretched in the gel state as. much as 20%-25% without any subsequent substantial loss in strength during cording and the wet strength, in general, is greater than 300 g./100 denier.
• staple fibers manufactured according to the process of the invention give an extremely resistant fiber yarn excelling in many respects the properties of cotton.
• Example A viscose solution was made from cotton linter cellulose containing 7.7% by weight of cellulose, 5.5% by weight of alkali, and a quinoline content of 0.15% by weight. This solution having a ripeness of 17 according to Hottenroth was spun into a coagulating bath maintained at about 70 C. The immersion distance of the thread was 70 cm. The coagulating bath contained 6% by weight of sulphuric acid, 19% by weight of sodium sulphate and 3.5% by weight of zinc sulphate. The spinneret was made of gold and platinum and contained 1000 ⁇ orifices, each orifice having a diameter of 60 microns, which produced a thread having a high total denier suitable for use as a reinforcing material for tires.
• the primary draw-off speed was 23.5 meters per minute, and between the primary draw-off rollers and the succeeding stretch roller having a peripheral speed of 44 meters per minute, the threads were stretched 87% in an aqueous bath containing 3% by weight of sulphuric acid maintained at a temperature of 90 C.
• the viscose pump was adjusted so that after the thread passed over the stretch roller it had a total denier of 1650.
• the thread was continuously aftertreated, dried and slashed.
• the improve ment which comprises adding 0.075 %-0.15% quinoline based on the weight of the viscose, to the viscose solution, extruding the viscose solution into an acid bath containing 3%-4.5% ZnSO, and withdrawing the thus formed thread from the bath and stretching the same at least 70%.

Landscapes

• Chemical & Material Sciences (AREA)
• Chemical Kinetics & Catalysis (AREA)
• General Chemical & Material Sciences (AREA)
• Engineering & Computer Science (AREA)
• Textile Engineering (AREA)
• Artificial Filaments (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=26641587

Family Applications (1)

Country Status (7)

Citations (7)

Family Cites Families (3)

• 0
  • BE BE537220D patent/BE537220A/xx unknown
  • NL NL83134D patent/NL83134C/xx active
  • NL NL195939D patent/NL195939A/xx unknown
  • NL NL80403D patent/NL80403C/xx active
  • BE BE544163D patent/BE544163A/xx unknown
• 1955
  • 1955-03-28 CH CH334580D patent/CH334580A/de unknown
  • 1955-03-29 DE DEN10411A patent/DE967687C/de not_active Expired
  • 1955-03-30 GB GB9307/55A patent/GB765905A/en not_active Expired
  • 1955-04-14 FR FR1122697D patent/FR1122697A/fr not_active Expired
  • 1955-04-25 US US503786A patent/US2914375A/en not_active Expired - Lifetime
• 1956
  • 1956-01-05 DE DEN11695A patent/DE1082003B/de active Pending
  • 1956-01-05 CH CH338548D patent/CH338548A/de unknown
  • 1956-01-12 GB GB1151/56A patent/GB791712A/en not_active Expired
  • 1956-01-26 FR FR69239D patent/FR69239E/fr not_active Expired

Patent Citations (7)

Also Published As

Similar Documents