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

• My invention relates to a process for producing artificial silk from viscose in which strands are obtained having a more or less curled or crimped appearance. This property is of importance for certain purposes.
• the process according to my invention has the advantage that no special after-treatment is necessary, strands of artificial silk having a curled or crimped appearance being obtained by spinning in the normal manner.
• a process is used therefor which is characterized by the feature that at least two bundles of filaments, which shrink to unequal extents, are united with one another.
• Varieties of viscose of difierent quality may, according to my invention be spun in order to attain this purpose.
• a number of spinning baths of different quality may also be used according to my invention.
• centrifuge process as well as bobbin spinning may be used in my new process. In the latter case, however, the strands must be dried hanging freely.
• two or more varieties of viscose may be spun in the same spinning bath and the coagulated filaments introduced together into a spinning not.
• varieties of viscose of different composition e. g., different cellulose content
• visccse' may also be used oi? different degrees of ripening, or two identical kinds of viscose may used, in which case certain substances are to one of the two viscoses.
• Another form of the process consists t two or more difierent spinning baths wi same varieties of viscose. in this case s rung may have different com;
• difierent varieties of viscose and unequal immersion lengths may be used.
• Two varieties of viscose one having a salt point of 5.5 and the other a salt point of 13. are spun from difierent spinning nozzles into a normal spinning "oethcontailiing 12% of sodium sulphate, 12% of magnesium sulphateand lofhqfgulphuric (The salt point of a viscose is thoriumacid. her which gives the percentage concentration of a sodium chloride solution in which a drop of viscose Just flocculates).
• the spinning is efiected in the usual manner, the two filament bundles being led into a centrifuge pot together.
• the individual filament bundles show a very different shrinking capacity and consequently a displacement of the individual filaments with respect to one another appears in the twisted thread, which gives rise to the curled appearance of the latter.
• Example II --Two varieties of viscose are used having difierent cellulose contents, e. g., spinning solutions having a cellulose content amounting to 8% and 5% respectively. Otherwise the procedure is as given in Example I.
• Example 2 [IL-Two spinning baths arranged side by side are used in which the same varieties of viscose are spun in the usual manner.
• composition of the two spinning baths may be chosen e. g. as follows:
• A. process of producing crepe effect composite artificial silk yarns which comprises spinning concurrently at least two bundles of artificial silk filaments, uniting the said bundles of filaments by twisting the same and effecting a difference in the shrinking characteristics of the different bundles prior to collecting the twisted composite yarn.

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 (1)

Publications (1)

Family

ID=19785036

Family Applications (1)

Country Status (4)

Cited By (6)

• 0
  • NL NL48905D patent/NL48905C/xx active
  • NL NL25351D patent/NL25351C/xx active
• 1929
  • 1929-11-22 DE DEA59714D patent/DE549459C/de not_active Expired
• 1930
  • 1930-10-14 GB GB30767/30A patent/GB350863A/en not_active Expired
  • 1930-11-12 US US495289A patent/US1993847A/en not_active Expired - Lifetime

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