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Making method of non-circular sectional special-shaped meta-position aromatic polyamide fiber

An aromatic polyamide, non-circular technology, which is applied in the field of processing and manufacturing special-shaped meta-aramid fibers, and can solve the problems of insufficient paper strength, small specific surface area, and fiber application limitations.

Active Publication Date: 2010-10-13
X FIPER NEW MATERIAL CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The existing fiber production method is to separate the polymer after interfacial polymerization, and re-dissolve and re-spin the polymer (such as U.S. Patent 3640970), low-temperature solution polymerization, and the polymerization solution is directly dry-spun (such as U.S. Patent 3063966) Or carry out wet spinning (as Chinese patent 200610043660.3), the fiber cross-section that these methods obtain is all circular, and the specific surface area of ​​circular cross-section fiber is relatively small, so the physical properties of these fibers are subject to greater restrictions, due to the relatively large specific surface area Small, so the dyeing performance is poor, also because the comparison area is relatively small, the strength of the paper is not good enough due to the small contact surface between the fiber and the pulp during papermaking
As a result, the application of fibers is greatly limited, and there are few reports on non-circular cross-sections at present

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Dissolve 108 grams of m-phenylenediamine in 1000 grams of N,N-dimethylacetamide, cool the solution to -15°C, and keep stirring, dissolve 203 grams of isophthaloyl chloride in 200 grams of N,N- In dimethylacetamide, cool to -15°C, mix the two and continue to stir for 30 minutes to obtain a polymer solution containing HCl, which is to make a spinning stock solution, and then add 74 grams of ground Ca(OH) 2 , further stirred for 30 minutes to completely neutralize, and passed through a 1000-mesh sieve to obtain the spinning dope. The spinning stock solution is extruded into the spinneret through the metering pump, and the spinneret has a diameter of 0.04 millimeters of spinneret holes, the density of the holes is 15 holes / square millimeter, and the aspect ratio of the holes is 3.5:1. The slurry passing through the spinneret hole is in contact with the surrounding coagulation bath. The coagulation bath contains 49% water, 37.6% N, N-dimethylacetamide, 2% meta-aramid oligome...

Embodiment 2

[0018] 108 grams of m-phenylenediamine were dissolved in 800 grams of N, N-dimethylacetamide, 203 grams of isophthaloyl chloride were dissolved in 200 grams of N, N-dimethylacetamide, and the solution was cooled to - 5°C, and keep stirring, mix the two solutions and continue to stir for 30 minutes to obtain a polymer solution containing HCl, then add 74 grams of ground Ca(OH) 2 , further stirred for 30 minutes to completely neutralize, and passed through a 1000-mesh sieve to obtain the spinning dope. The spinning stock solution is squeezed into the spinneret by a metering pump, and the spinneret is punched with elongated spinneret holes with a diameter of 0.02*0.6 mm. The density of the holes is 5 holes / square millimeter, and the aspect ratio of the holes is 2: 1, the slurry passing through the spinneret hole is in contact with the surrounding coagulation bath, containing 56% water in the coagulation bath, 33% N,N-dimethylacetamide, 2% surfactant, meta-aramid oligomer ( Molec...

Embodiment 3

[0020] 108 grams of m-phenylenediamine were dissolved in 800 grams of N, N-dimethylacetamide, 203 grams of isophthaloyl chloride were dissolved in 200 grams of N, N-dimethylacetamide, and the solution was cooled to - 1°C, and keep stirring, mix the two solutions and continue to stir for 30 minutes to obtain a polymer solution containing HCl, then add 74 grams of ground Ca(OH) 2 , and further stirred for 30 minutes to completely neutralize, and passed through an 800-mesh sieve to obtain the spinning stock solution. The spinning stock solution is extruded into the spinneret through a metering pump, and the spinneret is punched with a spinneret hole with a diameter of 0.09 mm. The density of the holes is 6 holes / square millimeter, and the aspect ratio of the holes is 2:1. The slurry passing through the spinneret hole is in contact with the surrounding coagulation bath. The coagulation bath contains 35% water, 50% N,N-dimethylacetamide, 5% meta-aramid oligomer (molecular weight le...

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Abstract

The invention relates to a method for preparing heterotypic meta-aromatic polyamide (MPIA) fiber with non-circular section. The meta-aromatic polyamide solution is squeezed directly into the low temperature coagulation bath containing surfactant after being neutralized and filtered, and the spinning shaped spun filament is carried out hot water stretching, washing and dry heat stretching to obtain finished MPIA fiber with non-circular section. The MPIA fiber with non-circular section obtained according to the method has larger specific surface area, more excellent textile processing performance, and is more suitable to fabricate high-temperature resistant synthetic fiber papers.

Description

technical field [0001] The present invention relates to a processing and manufacturing method of profiled meta-aromatic polyamide (MPIA) fiber, more precisely, relates to a processing and manufacturing method of profiled meta-aromatic polyamide fiber with non-circular cross-section, which belongs to chemical Fiber processing field. Background technique [0002] Meta-aramid fiber, also known as aramid 1313 fiber, has excellent heat resistance, flame resistance and good electrical insulation properties. It is widely used in fire protection clothing, insulation and high temperature resistance industries, and can also be used to make Aramid paper. [0003] The existing fiber production method is to separate the polymer after interfacial polymerization, and re-dissolve and re-spin the polymer (such as U.S. Patent 3640970), low-temperature solution polymerization, and the polymerization solution is directly dry-spun (such as U.S. Patent 3063966) Or carry out wet spinning (as Chi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01D1/02D01D1/10D01D4/02D01D5/253D01F6/60C08G69/32C08G69/28
Inventor 钟洲陈蕾胡祖明
Owner X FIPER NEW MATERIAL CO LTD
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