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Antipilling nitrilon and its production method

An anti-pilling acrylic fiber, production process technology, applied in textiles and papermaking, one-component synthetic polymer rayon, fiber chemical characteristics, etc. Poor durability, etc.

Active Publication Date: 2007-04-18
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The anti-pilling fiber produced by this method has poor durability and complex production process, which is not suitable for the existing production process
Once the finishing agent fails, the anti-pilling performance of the fiber will also decrease

Method used

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  • Antipilling nitrilon and its production method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Anti-pilling fiber pilot test:

[0024] The production of polymer A, the specific parameters of A polymer are shown in Table 4, and the reaction is carried out in a continuous reactor with a jacket of pure aluminum, and the feed amount of the reactant is accurately measured by a mass flow meter. The solid concentration is 28%, the reaction temperature is 65°C, the pH value in the kettle is 3.0, and the conversion rate is 85%. The jacket is cooled with chilled water to remove the heat generated by the reaction. Remove the monomer, wash it into the polymer and mix it;

[0025] For the production of polymer B, change the parameters of B set after 7 hours of production of polymer A to produce polymer B. The specific parameters are shown in Table 5. The preparation method and process conditions are the same as those of polymer A;

[0026] A and B two kinds of polymers are mixed in a mixing tank at a ratio of 1:1 to produce stock solution;

[0027] Dehydration and pulping s...

Embodiment 2

[0045] Acrylonitrile copolymer A with acrylonitrile content of 95%, vinyl acetate content of 5%, viscosity average molecular weight of 35000-50000 and acrylonitrile content of 85%, vinyl acetate content of 14%, viscosity average molecular weight of 50000-50000 For 60000 acrylonitrile copolymer B, the two polymers A and B are mixed in a ratio of 1:1.5.

[0046]The reactions were all carried out in a jacketed continuous reaction kettle of pure aluminum, the total monomer concentration of the feed was 35%, the reaction temperature was 55°C, the pH value in the kettle was 2.0, and the conversion rate was 75%. Chilled water is used for cooling to remove the heat generated by the reaction; the reacted polymer is terminated by reaction, the monomer is released, washed with water and mixed with the polymer; the mixed polymer is dehydrated and dissolved with sodium thiocyanate to prepare a polymer The raw material content is 13.5%, and the crude stock solution is extracted by air bubbl...

Embodiment 3

[0048] 91% acrylonitrile and 91% vinyl acetate? 9%, acrylonitrile copolymer A with a viscosity-average molecular weight of 35,000-50,000 and an acrylonitrile content of 91%, and a vinyl acetate content of ? 9%, an acrylonitrile copolymer B with a viscosity-average molecular weight of 50,000-60,000, and two polymers A and B in a ratio of 1:2.

[0049] The reactions were all carried out in a jacketed continuous reaction kettle of pure aluminum, the total monomer concentration of the feed was 30%, the reaction temperature was 60°C, the pH value in the kettle was 2.5, and the conversion rate was 80%. Chilled water is used for cooling to remove the heat generated by the reaction; the reacted polymer is terminated by reaction, the monomer is released, washed with water and mixed with the polymer; the mixed polymer is dehydrated and dissolved with sodium thiocyanate to prepare a polymer The raw material content is 13.5%, and the crude stock solution is released through air bubbles, ...

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Abstract

The invention relates to a kind of Anti-pilling acrylic and its production technology. Based on weight proportion, it contains acrylonitrile copolymer A with 90-95% Acrylon, 10-5% Nikasol and viscosity average molecular weight of 35000-50000 and acrylonitrile copolymer B with 86-95% Acrylon, 14-5% Nikasol and viscosity average molecular weight of 50000-60000. The two copolymers mix at a ratio of 1:1-2. Total monolithic density of feed materials is 28-35%. Reaction temperature is 55-65deg.C, PH value is 2.0-3.0 and percent convention is 75-85%. Mixed copolymers are dewatered and solved by sodium sulfocyanate to prepare coarse stock solution with 13.5-14% copolymer. Coarse stock solution is degassed and filtered to get spinning stock solution. Reduce content of diad in copolymer to enhance intermolecular density, debase activity of molecular chain and enhance fiber rigidity and fragility of shearing action. Fiber ends in fabric are not easy to wind or knot, which achieves good anti-pilling effect.

Description

technical field [0001] The invention relates to an anti-pilling acrylic fiber produced by applying a two-step polymerization process of acrylic fiber and a production method thereof. Background technique [0002] Most synthetic fibers suffer from the phenomenon of "pilling" during use. Acrylic macromolecules have an irregular helical conformation and do not have a real crystalline structure. Therefore, there are no strict crystalline regions and amorphous regions, only high-order regions and low-order regions. It is much higher than natural fibers and regenerated cellulose fibers, and the formation rate of fiber pellets on the surface of the product is greater than the rate of shedding, so when the friction force cannot eliminate the fiber pellets, the formed fiber pellets will last for a long time It remains on the surface of the fabric, which seriously affects the appearance and wearing comfort of the fabric. The existing acrylic fiber anti-pilling modification method is...

Claims

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Application Information

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IPC IPC(8): D01F6/38
Inventor 马廷连张伟邓爱琴孙继良尚印锋王宝业董旭东吴景哲梁富赵春波
Owner PETROCHINA CO LTD
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