Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B60—VEHICLES IN GENERAL
  • B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
  • B60C9/00—Reinforcements or ply arrangement of pneumatic tyres
  • B60C9/0042—Reinforcements made of synthetic materials
• • 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

• Thelowering of the degree of swelling and also an' improvement in the resistance to fatigue are alsoof great importance. 7
• the amounts of these additives should not be more than 4 millimoles per 100 grams of viscose.
• These monoamines have also been added in substantially the same amounts to the spinning baths.
• the spinning baths used when operating by these methods contain zinc sulphate, namely, in amounts of 3 to 25%.
• serious disadvantages may be encountered in carrying out these processes, since the spinning conditions must be maintained within very narrow limits and in addition only a small latitude is allowed for the draw-01f speed. For example, if the desired technical results are to be assured, it is not possible to operate with draw-ofi speeds greater than 20-25 meters/minute.
• the monoisopropanol amine is added in amounts of 2,893,821 Patented July 7, 1959 ice 2 0.06-0.4% by weight, preferably 0.10-0.15 by weight,
• the addi tive can be employed with all viscoses of conventional working compositions, and as such there may be men;
• the spinning ripeness of the viscose should not be'below a -nnmber of 42.
• the spinning baths to beused should contain zinc in amounts of at least 3.2%.
• the sodium sulphate content can be within the usual, limits between 14.00% and 20.00%, while the sulphuric,
• the yarns spun by the process according to the present invention show strength values of 400-420 g./100 den. These-Values can be increased to 430-460 g./100 den. by afters'tretching. -The yarns are particularly suitable for use as tire cord owing to their high shrinkagez'and abrasion values, and also owing to an extraordinarily low swelling factor.
• Example I Alkali cellulose composed of linters or wood cellulose with a high ot-cellulose content is sulphidised for five hours with 38% carbon bisulphide and the xanthate obtained is dissolved to give a viscose having 7.4% of cellulose and 5% of NaOH. During the dissolving operation 0.1% of monoisopropanol amine is added to the viscose. The viscose is then filtered in the usual way, deaerated and finally ripened, and is spun with a viscosity of 60 seconds by the falling-ball method and with a -number of 44. The spinning bath has a composition of 4.8% of H 80 4% of ZnSO and 17% of Na SO and a temperature of 60 C.
• the yarn has 1000 filaments with an individual titre of 1.65 den. and is guided over a distance of 65 cm. in the spinning bath and is withdrawn by a roller at a speed of 21 meters/minute.
• the yarn then travels through a second weakly acid bath which has a temperature of about C. and is withdraw-n at the end of said second bath by a second roller revolving sufiiciently fast to give a yarn drawofi speed of 42 meters/minute, so that the yarn is stretched by From the second roller the yarn runs into a centrifuge rotating at 4600 r.p.m. and is given a twist therein of turns per meter. After being washed and finished, the yarn is finally stretched by 8% and dried.
• the finished yarn has tensile strengths of 4.4 g./den. (dry) and 3 g./den. (wet), and elongation values of 14% (dry) and 27% (wet).
• Example I A viscose corresponding to that described in Example I isspun at a temperature of 60 C. into a bath having the following composition: 5% of H 80 4% of ZnSO and 16%. of Na SO A spinneret with 120 orifices is used;' the yarns have a titre of 60 den. After being stretched by 100% in a second hot bath, the yarn is collected in a centrifuge. It has a tensile strength of 4.2 g./den. with an elongation of 15%.
• a method for the manufacture of regenerated cellulose yarns from viscose the step which comprises adding to viscose a small amount of mono-isopropanol amine.
• step 2 which comprises adding to viscose approximately 0.060.4% by weight of mono-isopropanol amine.
• step 3 which comprises adding to viscose approximately 0.100.15% by weight of mono-isopropanol amine.
• the method of producing regenerated cellulose yarn from viscose comprising spinning viscose into an aqueous spinning bath containing sulphuric acid and at least 3.2%
• the method of producing regenerated cellulose yarn from viscose comprising spinning viscose into an aqueous spinning bath containing sulphuric acid and at least 3.2% zinc sulphate, the viscose containing approximately 0.06-0.4% by weight of mono-isopropanol amine and the concentration of sulphuric acid being at most the same as the concentration.

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

Applications Claiming Priority (1)

Publications (1)

Family

ID=7572684

Family Applications (1)

Country Status (7)

Cited By (3)

Citations (5)

• 0
  • NL NL210229D patent/NL210229A/xx unknown
  • NL NL90492D patent/NL90492C/xx active
  • BE BE549945D patent/BE549945A/xx unknown
• 1955
  • 1955-09-03 DE DEV9443A patent/DE1009761B/de active Pending
• 1956
  • 1956-08-10 CH CH346967D patent/CH346967A/de unknown
  • 1956-08-28 US US606548A patent/US2893821A/en not_active Expired - Lifetime
  • 1956-08-31 GB GB26720/56A patent/GB795503A/en not_active Expired
  • 1956-09-03 FR FR1156253D patent/FR1156253A/fr not_active Expired

Patent Citations (5)

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