Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B60—VEHICLES IN GENERAL
  • B60G—VEHICLE SUSPENSION ARRANGEMENTS
  • B60G11/00—Resilient suspensions characterised by arrangement, location or kind of springs
  • B60G11/32—Resilient suspensions characterised by arrangement, location or kind of springs having springs of different kinds
  • B60G11/34—Resilient suspensions characterised by arrangement, location or kind of springs having springs of different kinds including leaf springs
  • B60G11/36—Resilient suspensions characterised by arrangement, location or kind of springs having springs of different kinds including leaf springs and also helical, spiral or coil springs
• • 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 present invention relates to a new process of manufacturing artificial silk, threads, bands, 'horse hairs, films, etc. from viscose and to the new precipitatingbath employed It is based on the observation that halogenated fatty acids have a favorable influence on the operation of coagulating viscose.
• halogenated fatty acids as for instance mono di-, trl-chloracetic acid are added to the coagulating bath whereby products of good properties are pbtained.
• the presence of such acids in the bath lends to the products a tensile strength, extenslbihty, lustre and capacity for being dyed which suit all requirements.
• halogenated fatty acids are not associated with any particular bath. They may be used in any known bath provided, of course. that the bath does not react with halogenated fatty acids in an undesirable manner.
• the spinning baths consisting of sulfuric acid and sulfuric acid salts in which artificial silk is commonly made may be mixed with one or more halogenated fatty acids.
• halogenated fatty acids may also be added without change of the bath. but it may be advantageous to substitute the halogenated fatty acid for a more or less considerable portion of the mineral acid constituents of the spinning bath.
• halogenated fatty acid and the proportion which is added to the bath depend merely on the question of solubility.
• the easily soluble monochloracetic acid may be added in very considerable proportions in a quantity of for instance per cent, whereas trichloracetic acid is only slightly soluble in many of the usual baths.
• halogenated fatty acid in the'bath modifies the conditions of coagulation, for instance the speed of the action of the mineral acid is varied and thereby a product of good softnessobtained.
• a spinning bath one is in the position to obtain under various conditions of maturity of viscose a fiber of constant good physical properties, such as.
• the action of the halogenated fatty acid can be considerably increased by using the acid in the form of an intermediate bath, through which the threads pass after'they have left the spinning bath and before they are wound on the spools.
• the length of immersion in sucl an intermediate bath depends on the degree of concentration of the bath liuor.
• Example 1 A viscose solution containing 7 5 per cent of cellulose and having a ripeness of 4 titrated with sodium chloride solution, is pressed through a nozzle with 60 openings of about 0.09 mm. diameter in. a precipitating bath containing 13.5 per cent ofsulfuric acid, 31 per cent of sodium sulfate and 55.5 per cent of water. The drawing speed is held at about meters per minute, and the viscose pump deliverssuch a quantity of viscose that the bundle of threads obtained, has a titer of 120 deniers;
• the threads are stretched by guiding them over glass roods.
• the temperature of this precipitating bath is kept at about 50 C.
• the threads are guided in a second bath containing per cent of monochloracetic acid and 25 per cent of water, this second bath being kept at a temperature of 22 C.
• the threads obtainable in this manner have a tensile strength of about 250 grams per 100 deniers and an extensibility of about 8.5 per cent.
• Example Q A viscose solution containing 7.5 per cent of cellulose and 7.5 per cent of alkali and having a normal ripeness, is spun into a precipitating bath containing 13.5 per cent of sulfuric acid, 31 percent of sodium sulfate, 10 per cent of monochloracetic acid and 45.5 per cent of water.
• the threads may be stretched by guiding them on their way from the nozzle to the collection device over glass roods or through a suitable thread guide known in the art.
• the precipitating bath is kept at a temperature of about 50 (1., the drawing speed may be maintained at about 50-60 meters per minute.
• the threads obtainable have a tensile strength of about 230 grams per 100 deniers and an extensibility of about 710 per cent.
• Example 3 A viscose solution is spun under the same conditions as mentioned in Example 2, the precipitating bath, however, contains instead of monochloracetic acid trichloracetic acid. ities are obtained.
• Process for manufacturing artificial threads, bands, films or the like from a viscose solution which comprises pressing a viscose solution in a precipitating bath containing sulfuric acid and a halogenated fatty acid.
• Process for manufacturing artificial threads, bands, films or the like from .a viscose solution which comprises pressing a viscose solution in a precipitating bath containing sulfuric acid, sodium sulfate and a halogenated fatty acid.
• Process for manufacturing artificial threads, bands, films or the like from a viscose solution which comprises pressing a viscose solution in a precipitating bathcon- Threads of similar qualtaining sulfuric acid, sodium sulfate and a chlorinated acetic acid.
• a precipitating bath containing sulfuric acid, sodium sulfate and monochloracetic acid containing sulfuric acid, sodium sulfate and monochloracetic acid.
• Process for manufacturin artificial threads, bands, films or the like rom a viscose solution which comprises pressing a viscose solution in a precipitating bath containing sulfuric acid, sodium sulfate and trichloracetic acid.

Landscapes

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

Applications Claiming Priority (1)

Publications (1)

Family

ID=6137591

Family Applications (1)

Country Status (5)

• 0
  • BE BE358315D patent/BE358315A/xx unknown
  • NL NL25282D patent/NL25282C/xx active
• 1911
  • 1911-05-29 FR FR430442A patent/FR430442A/fr not_active Expired
• 1929
  • 1929-02-16 FR FR669746D patent/FR669746A/fr not_active Expired
  • 1929-05-28 GB GB16420/29A patent/GB312915A/en not_active Expired
  • 1929-05-31 US US367612A patent/US1836656A/en not_active Expired - Lifetime

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