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Conjugate spinneret for dissolvent method cellulose fiber spinning

A cellulose fiber and composite spinning technology, which is used in spinneret assemblies, textiles and papermaking, etc., can solve the problem that the stability of fiber strength and elongation cannot be guaranteed, the winding speed of melt spinning spinneret cannot be improved, Reduced spinning productivity and other problems, to achieve the effect of simple structure, improved fiber quality, and increased spinning speed

Inactive Publication Date: 2006-07-19
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Conversely, the larger the hole diameter, the smaller the ejection speed, and the improvement of the winding speed is limited
It can be seen from this that the winding speed of the melt spinning spinneret cannot be increased, which not only reduces the productivity of spinning, but also makes the stability of quality indicators such as fiber strength and elongation unguaranteed.

Method used

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  • Conjugate spinneret for dissolvent method cellulose fiber spinning

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Experimental program
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Effect test

Embodiment Construction

[0020] The processing technology and manufacturing precision requirements of the composite spinneret are the same as those of the conventional spinneret.

[0021] The pulp with a degree of polymerization (DP) of 600 is dissolved in NMMO aqueous solution, the cellulose content is 10%, the refraction index of the prepared cellulose spinning solution is 1.4860, the viscosity is 1000Pa.·s, and it is light brown and transparent. After being pressurized by the booster pump, it is filtered by the pre-filter and then enters the melt-spinning box. The composite spinneret is inlaid with 10 spinnerets, and each spinneret has 600 spinneret holes with a diameter of φ=0.07mm. The total number of holes in the composite spinneret is 6000. When spinning, the temperature of the spinning solution is 90°C, 10% NMMO aqueous solution is used as the coagulant, the temperature of the coagulation bath is 20°C, the winding speed is 90m / min, and the filaments are washed with water → crimped → cut → spr...

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Abstract

The invention relates to a spinneret used in cellulose-fiber springing by solvent method, its character: there are several spinning caps with orifices on the surface of the universal melt-spinning spinneret without orifices, it is a composite spinneret, its structure is simple, easy to fabricate and it integrates the advantages of melt spinning and wet spinning spinnerets. It provides the special spinet, able to be adaptive to higher spinning viscosity, wider range of size and higher spinning speed.

Description

Technical field: [0001] The invention relates to a spinneret, a special component used for spinning in the chemical fiber manufacturing industry, in particular to a special spinneret used in the spinning process of solvent-based cellulose fibers. Background technique: [0002] The manufacture of any kind of chemical fiber is to process the polymer into a fluid fluid (that is, a molten melt or a dissolved solution), which is extruded through a small hole to form a thin stream, which is then solidified Made into fibers. The part with small holes into which the fluid is squeezed is the spinneret, an indispensable part in chemical fiber spinning. [0003] Due to the different properties of the polymers and their fiber types, different spinning methods must be used. Generally, there are several types of melt spinning, wet spinning and dry-wet spinning. For example, polyester is produced by melt spinning. This method is to extrude the polymer melt through the small holes of the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01D4/02D01D4/00
Inventor 胡学超章潭莉邵惠丽邹荣华
Owner DONGHUA UNIV