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Preparation for all-metaposition aromatic polyamide fibre

A polysulfone amide, a technology for manufacturing method, applied in the direction of single-component polyamide rayon, fiber chemical characteristics, single-component synthetic polymer rayon, etc., can solve the problem of increasing yarn brittleness, reducing yarn strength, breaking problems such as small elongation, to achieve the effect of improving yarn spinnability, crimping performance, and elongation at break

Active Publication Date: 2008-10-01
中芳新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The aromatic polysulfone amide fiber prepared by this method has the advantages of good strength and small heat shrinkage, but the disadvantage is that the elongation at break is small and the curling performance is poor, which often affects the spinnability of the fiber in the yarn forming process. Increase yarn brittleness and reduce yarn strength

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Dissolve 170 parts of dry 3'3-DDS in 1080 parts of freshly distilled dry DMAC, cool to -15°C, add 140 parts of refined granular IPC, and control the polymerization temperature within the range of -15 to 0°C After all the IPC is added, the reaction is continued at 5-15°C for 90 minutes, and then 51.5 parts of calcium hydroxide is added for neutralization. The neutralization reaction temperature is controlled at 60±5°C, and the reaction time is 10 hours. 18% solids spinning slurry. The above-mentioned spinning slurry is metered by a metering pump, filtered by a filter, and sprayed into a coagulation bath from a spinneret. The number of spinning holes of this spinneret is 3000 holes, and the spinning hole diameter is 0.06mm, and the spinning speed is 5.5m / min. The composition of the coagulation bath is: DMAc60%, calcium chloride 3.5%, water 36.5% (both quality percentage), the temperature of coagulation bath is 10 DEG C; enter the pre-stretching tank after being coagulate...

Embodiment 2

[0015] Dissolve 105.9 parts of dry 3'3-DDS in 1080 parts of freshly distilled dry N,N-dimethylformamide (DMF), cool to 0°C, add 87.2 parts of granular refined IPC to control polymerization The temperature is within the range of 0-10°C. After all the IPC is added, the reaction is continued at 5-20°C for 60 minutes, and then 24.3 parts of calcium oxide is added for neutralization. The neutralization reaction temperature is controlled at 50±5°C, and the reaction time is 20 hours. , thus making a spinning slurry with a polymer solid content of 13%. The above-mentioned spinning slurry is metered by a metering pump, filtered by a filter, and sprayed into a coagulation bath from a spinneret. The number of spinning holes of this spinneret is 3000 holes, and the spinning hole diameter is 0.06mm, and the spinning speed is 6.5m / min. The composition of the coagulation bath is: DMF50%, calcium chloride 4.0%, water 45% (both are quality percentage), the temperature of the coagulation bath ...

Embodiment 3

[0017] Dissolve 170 parts of dry 3'3-DDS in 1080 parts of freshly distilled dry DMAC, cool to 15°C, add 140 parts of granular refined IPC, control the polymerization temperature within the range of 15-30°C, IPC After all the addition, continue the reaction at 15-30°C for 45 minutes, then add 33.3 parts of lithium hydroxide for neutralization, the neutralization reaction temperature is controlled at 70±5°C, and the reaction time is 2 hours. 18% spinning size. The above-mentioned spinning slurry is metered by a metering pump, filtered by a filter, and sprayed into a coagulation bath from a spinneret. The number of spinning holes of this spinneret is 3000 holes, and the spinning hole diameter is 0.075mm, and the spinning speed is 6.0m / min. The composition of the coagulation bath is: DMAc60%, lithium chloride 5.0%, water 35% (both quality %), the temperature of coagulation bath is 10 DEG C; enter the pre-stretching groove after coagulating into silk, and stretching bath is compos...

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Abstract

The invention relates to a full interposition aromatic polysulfonamides fibre production method, which includes three steps: the spinning serous producing, wet method spinning and post treatment. The spinning serous producing includes the following steps: dissolving 3' 3-diaminodiphenyl sulphone in an organic polar solvent, cooling to -20-20 EDG C; adding metaphenylene dimethylamine acyl with the same molecular of 3' 3-diaminodiphenyl sulphone for executing polymerization reaction; and then adding inorganic base with the same molecular of 3' 3-diaminodiphenyl sulphone for executing neutralization reaction with the hydrogenchloride produced in the polymerization reaction, thereby manufacturing spinning slurry with 10%-20% of dry content. The fabre obtained by the invention method, has largely improved curl performance compared with the conventional aromatic polysulfonamides fibre, obviously improves the elongation at break and improves the resultant yarn leptogenesis.

Description

technical field [0001] The invention relates to a method for manufacturing chemical fibers, in particular to a method for manufacturing all-meta aromatic polysulfone amide fibers. Background technique [0002] Aromatic polysulfoneamide has excellent heat resistance and flame resistance, as well as excellent high-temperature electrical insulation properties, and is used to prepare fire-resistant and flame-resistant materials and high-use temperature insulating materials, such as fibers. [0003] Chinese patent CN1176256C discloses a manufacturing method of aromatic polysulfone amide fibers, which uses 5% to 50% of 3'3-diaminodiphenylsulfone (3'3-DDS) and 50% to 95% of 4' 4-Diaminodiphenylsulfone (4'4-DDS) is blended with terephthaloyl chloride (TPC) and obtained by low-temperature solution polymerization and wet spinning. The content of meta-para aromatic amide bonds in the fiber molecular structure is 5 % to 50%, and the para-aromatic amide bond content is 50% to 95%. [0...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F6/58D01D5/06C08G69/42D01F6/60
CPCD01F6/76D01D1/02D01F6/605
Inventor 汪晓峰李军袁荣华汪海峰陆顺兴陈晟晖常继成宋庆荣
Owner 中芳新材料有限公司
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