Classifications

• • D—TEXTILES; PAPER
  • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
  • D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
  • D01D5/00—Formation of filaments, threads, or the like
  • D01D5/24—Formation of filaments, threads, or the like with a hollow structure; Spinnerette packs therefor
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T428/00—Stock material or miscellaneous articles
  • Y10T428/29—Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
  • Y10T428/2913—Rod, strand, filament or fiber
  • Y10T428/2973—Particular cross section
  • Y10T428/2975—Tubular or cellular
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T428/00—Stock material or miscellaneous articles
  • Y10T428/29—Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
  • Y10T428/2913—Rod, strand, filament or fiber
  • Y10T428/298—Physical dimension

Definitions

• This invention relates to the manufacture of artificial threads and more particularly to a process of producing artificial textile threads in which each filament is less than 2 deniers and also is 5 tubular, i. e., has a continuous canal.
• the present invention relates to the manufacture of an artificial viscose silk in which each filament is provided with a continuous canal and is of a denier lower than 2 and, in an accessory way, to varying or modifying the feel of the product 0 thus obtained.
• each of the filaments being of a denier less than 2.
• the British patent specification No. 255,527 shows in a diagram the zones in which the concentration of the spinning bath should remain a function of the degree of ripening of the viscose, for the special case of a thread having tubular fibers of a beautiful brilliancy.
• the concentration is expressed in this specification by the specific gravity of the bath, or for a given content of sulphuric acid, bythe quantity of sodium sulphate which must be dissolved therein. Since the specification contains no reference to the titer of the elementary fiber, however,it is only logical to conclude that its subject matter relates to an elementary titer of more than 2 deniers, which was the most usual custom at that period.
• the acidity of the bath should be increased but in a proportion other than that fixed by the British patent specification No. 163,817, and that the essential factor is the concentration of the bath and not its acidity.
• concentration we mean the weight of dissolved matter per liter, including the acid.
• concentrations indicated in the British patent specification No. 255,527 being considered as applied to a thread having tubular fibers of 2 deniers, the said concentrations of sulphuric acid and sodium sulphate are to be increased by 20% at least, and preferably by between 25% and 30%, the saturation point being the sole limit, when the titer of the elementary fiber is 1 denier.
• a viscose solution of the type which is employed in the manufacture of hollow filaments is spun into a spinning bath, hereafter more fully described.
• the coagulated and regenerated cellulose thread is then given a bath travel of not exceeding and preferably less than 25 centimeters.
• After withdrawal from the spinning bath the thread is given a travel in air of not less than centimeters to ensure substantially complete fixation before engaging the delivery roller.
• the thread is then wound up in any suitable manner as in a centrifugal spinning bucket.
• the thread does not engage with any devices which impede the free travel of the thread. If the thread is to be stretched, this is preferably effected by suitable devices imposing the desired tension on the thread between the spinning bath and the delivery roller or beyond the latter.
• the spinning bath contains sulphuric acid, sodium sulphate, and preferably also zinc sulphate.
• concentration of the bath depends upon the filament-denier desired, 1. e. the higher the concentration of the bath, the smaller will be the filament produced.
• the concentration of the bath is at least approximately 20% and preferably approximately 25% to 30% higher than the concentration of the bath employed in the production of filaments having a denier of 2.
• the bath concentration indicated in British patent specification No. 255,527 is considered as applied to a thread having tubular fibers of 2 deniers.
• the concentration of the bath which is to be used in the production of filaments having a denier other than 1 and less than 2 can be secured by interpolation from the concentrations herein given.
• the thread is given a bath travel of 20 centimeters. Also, in each case the thread, on leaving the spinning bath, travels centimeters in the air before arriving at the delivery roller which delivers it at a speed of 60 meters into a centrifugal pot rotating at 5,000 revolutions per minute.
• Another illustrative example of the instant invention comprises spinning a viscose solution of the type previously mentioned in the following bath to produce a 100 denier-66 filament thread:
• the bath travel, travel in air, winding, etc. are the same as in the previous example.
• the threads obtained according to the present invention are characterized by an extraordinary suppleness, feel and curl. They provide noncreasing fabrics. They have a very particular interest when they are obtained in the form of slivers intended to be cut up into lengths to constitute artificial schappe, the said slivers being preferably obtained on a continuous frame in which the sliver is spun and undergoes all the subsequent treatments as far as final drying. Thus, it is readily possible to produce slivers of 100,000 deniers having fibers or" at most 1 denier, all provided with a continuous central channel. This spun material, having a Wooly appearance which has never before been attained, lends itself to numerous uses in fields into which artificia. silk has only rarely penetrated.
• the quantity of sodium sulphate which corresponds thereto is caused to vary slightly, for example, 20 grams per liter more or less, the feel of the thread is modified. Starting from the concentration giving average feel, if the proportion is increased, the softness diminishes and the curl increases; if it is lower, the converse takes place.

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Textile Engineering (AREA)
• Artificial Filaments (AREA)
• Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)

Applications Claiming Priority (3)

Publications (1)

Family

ID=32045548

Family Applications (2)

Family Applications After (1)

Country Status (5)

Cited By (3)

Families Citing this family (3)

• 0
  • NL NL42720D patent/NL42720C/xx active
  • NL NL41547D patent/NL41547C/xx active
  • NL NL46357D patent/NL46357C/xx active
• 1934
  • 1934-05-24 FR FR787585D patent/FR787585A/fr not_active Expired
  • 1934-05-25 FR FR787586D patent/FR787586A/fr not_active Expired
  • 1934-06-05 GB GB16734/34A patent/GB421157A/en not_active Expired
• 1935
  • 1935-05-21 US US22518A patent/US2136463A/en not_active Expired - Lifetime
  • 1935-05-21 US US22517A patent/US2136462A/en not_active Expired - Lifetime
  • 1935-08-01 FR FR47015D patent/FR47015E/fr not_active Expired
  • 1935-09-02 GB GB24486/35A patent/GB454811A/en not_active Expired
• 1936
  • 1936-07-17 CH CH206682D patent/CH206682A/de unknown

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