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High strength cellulosic filament its use, and method for the production thereof

Inactive Publication Date: 2014-07-24
GLANZSTOFF BOHEMIA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The patent describes a method for making high-strength, non-pigmented cellulose filaments using a tube spinning process. By using pulp with a high α-content (93-99%), the method reduces the amount of low-molecular constituents that affect the strength of the finished filament and prevents them from interfering with the spinning process. The resulting filaments have an improved strength of up to 22 cN / tex and can be spun faster using the tube spinning method (up to 180 m / min with a pigment dispersion and up to 85 m / min without it). The tube spinning method also allows for the production of regenerated cellulose filaments with a pigment content of more than 20 wt% and strength of up to 19 cN / tex.

Problems solved by technology

So far, it had not been possible to produce such fine regenerated cellulose filaments with the above described strengths, especially if they contained sufficient quantities of pigment.

Method used

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  • High strength cellulosic filament its use, and method for the production thereof
  • High strength cellulosic filament its use, and method for the production thereof
  • High strength cellulosic filament its use, and method for the production thereof

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Experimental program
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Embodiment Construction

[0082]6 parts by weight of 2,2′-oxybis[5,5-dimethyl-1,3,2-dioxaphosphoriane]2,2′disulfide, 6 parts by weight of water, and 0.55 parts by weight of alkyl polyglycol ether phosphoric acid ester are homogenized using a dissolver and ground in an agitator bead mill (Drain, type Perl Mill PML-V / H) with zirconium oxide grinding beads at a temperature of 40-55° C. until the finished dispersion has an x992, related to cellulose. The viscose was filtered 4 times and vented. 1 hour prior to spinning, 3% (related to cellulose) of ethoxylated amine, a modifier causing a sheath structure, was added to the viscose. The viscose was post-ripened to a spinning gamma value of 57. The viscosity during spinning was 80 falling ball seconds. The finished flame retardant dispersion is added to this ready-to-spin viscose.

[0083]The spinnerets used have a spinneret hole diameter of 60 μm. The precipitation bath contains 75 g / 1 of sulfuric acid, 113 g / 1 of sodium sulfate, and 53 g / 1 of zinc sulfate. The preci...

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Abstract

The present invention relates to high-strength, possibly pigment-containing—for example flame-retardant—regenerated cellulosic filaments having improved textile properties, in particular as regards strength and uniformity, to their use for the production of fabrics, and to a method for the production of these filaments.

Description

BACKGROUND OF THE INVENTIONField of the Invention[0001]The present invention relates to high-strength regenerated cellulosic filaments having improved textile properties, in particular as regards strength and uniformity, to their use for the production of fabrics, as well as to a method for the production of these filaments. These high-strength filaments may also contain pigments such as flame-retardant pigments.[0002]Regenerated cellulosic filaments have been known for a long time. They are used particularly for textiles, but in a high-strength form also for technical applications such as tire cords. For the purposes of this invention, the term “regenerated cellulosic fibers” denotes such fibers that are made of a cellulose-containing spinning solution by spinning into a spinning bath (often also referred to as a precipitation bath), the cellulose in the spinning solution being present in the form of a cellulose derivative, in particular as cellulose xanthogenate, while in the prec...

Claims

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Application Information

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IPC IPC(8): D01F2/14
CPCD01F2/14D01F1/04D01F2/00D01F2/06D01F1/07Y10T428/2913Y10T428/249921
Inventor MALINOWSKY, ROBERTNEUNTEUFEL, MARTINGUGERELL, FRANZ
Owner GLANZSTOFF BOHEMIA
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