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High-strength low-stretch chinlon 6 short fiber and preparation method thereof

A high-strength, low-stretch, short-fiber technology, applied in the chemical characteristics of fibers, rayon manufacturing, monocomponent polyamide rayon, etc., can solve the problem of poor fiber dispersion, uneven distribution of tensile strength, and poor durability. Advanced problems, to achieve the effects of good mechanical properties, not easy to settle, and short reaction time

Active Publication Date: 2019-03-01
江苏恒创园区管理服务有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the above patents have carried out high-strength modification of nylon 6, the modification method is basically prepared by adding additives and blending. The dispersion of additives in the fiber is not good, resulting in poor tensile strength distribution. Uniform, low durability
[0005] There are also the following problems in the preparation of existing high-strength and low-elongation nylon 6 fibers: 1) using high-viscosity slices to prepare nylon is a common method to improve its strength, but due to the improvement of its relative viscosity, its flowability at a certain temperature It will also become worse. In order to make it spin normally, the spinning temperature has to be increased, but increasing the spinning temperature will easily cause the degradation of the polymer molecular chain, so the degree of improvement in its strength is limited; 2) In order to increase the strength, it will be in the polymer. Add some functional masterbatches, but the functional masterbatches often have uneven dispersion, which makes the distribution of fiber crystallization regions different, resulting in uneven breaking strength of fibers

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] A preparation method of high-strength and low-elongation nylon 6 staple fiber, the specific steps are as follows:

[0045] (1) prepare mixture;

[0046] (1.1) Disperse the mixture of carbonyl-containing organomontmorillonite and carbonyl-containing acicular wollastonite (mass ratio: 3:1) in absolute ethanol to obtain a solid content of 10 wt%. suspension;

[0047] (1.2) Add the suspension into a grinder and grind for 3 hours;

[0048] (1.3) Add caprolactam sodium salt and grind at 60°C for 1 hour, then dry and airflow pulverize after 10 hours of slurry aging to obtain powder;

[0049] (1.4) Mix powder, water and caprolactam to obtain a mixture, wherein in the mixture, the mass ratio of water to caprolactam is 2:100, and the content of the mixture of carbonyl-containing organic montmorillonite and carbonyl-containing acicular wollastonite is 4wt%, the mass ratio of the mixture of carbonyl-containing organic montmorillonite and carbonyl-containing acicular wollastonite...

Embodiment 2

[0054] A preparation method of high-strength and low-elongation nylon 6 staple fiber, the specific steps are as follows:

[0055] (1) prepare mixture;

[0056] (1.1) Disperse a mixture of organic montmorillonite containing carbonyl groups and acicular wollastonite containing carbonyl groups on the surface (mass ratio of 3:2) in absolute ethanol to obtain a solid content of 13 wt%. suspension;

[0057] (1.2) Add the suspension into the grinder and grind for 2.5 hours;

[0058] (1.3) Add caprolactam magnesium bromide and grind at 85°C for 3 hours, then after 8 hours of slurry aging, drying and jet milling to obtain powder;

[0059] (1.4) Mix powder, water and caprolactam to obtain a mixture, wherein in the mixture, the mass ratio of water to caprolactam is 5:100, and the content of the mixture of carbonyl-containing organic montmorillonite and carbonyl-containing acicular wollastonite is 1wt%, the mass ratio of the mixture of carbonyl-containing organic montmorillonite and carb...

Embodiment 3

[0064] A preparation method of high-strength and low-elongation nylon 6 staple fiber, the specific steps are as follows:

[0065] (1) prepare mixture;

[0066] (1.1) Disperse a mixture of organic montmorillonite containing carbonyl groups and acicular wollastonite containing carbonyl groups on the surface (mass ratio of 2:3) in absolute ethanol to obtain a solid content of 17wt%. suspension;

[0067] (1.2) Add the suspension into a grinder and grind for 2 hours;

[0068] (1.3) Grignard reagent was added and ground at 50°C for 3 hours, followed by 6 hours of slurry aging, drying and jet milling to obtain powder, wherein the Grignard reagent was a commercially available alkylmagnesium halide organic compound;

[0069] (1.4) Mix powder, water and caprolactam to obtain a mixture, wherein in the mixture, the mass ratio of water to caprolactam is 1:100, and the content of the mixture of carbonyl-containing organic montmorillonite and carbonyl-containing acicular wollastonite is 8...

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Abstract

The invention relates to a high-strength low-stretch chinlon 6 short fiber and a preparation method thereof. The method includes: spinning high-strength low-stretch chinlon 6 melt to prepare the high-strength low-stretch chinlon 6 short fiber, wherein the high-strength low-stretch chinlon 6 is produced through a reinforcing powder surface chain propagation reaction, a ring-opening pre-polycondensation reaction, a final polycondensation reaction, and a tackifying reaction from a mixture, which is mainly composed of: caprolactam, the reinforcing powder coated with a catalyst, and water. The produced high-strength low-stretch chinlon 6 short fiber is 0.89-2.22 dtex in linear density, not less than 6.0 cN / dtex in breaking strength and not more than 45% in breaking elongation. The reinforcing powder can enhance mechanical performances of the chinlon 6 short fiber; by means of the reinforcing powder surface chain propagation reaction, the reinforcing powder can be dispersed completely in thefiber, so that the chinlon 6 short fiber has good mechanical performances, uniform strength distribution and high quality.

Description

technical field [0001] The invention belongs to the field of polyamide preparation, and relates to a high-strength and low-elongation nylon 6 staple fiber and a preparation method thereof. Background technique [0002] Nylon is the trade name of polyamide fiber, also known as nylon (Nylon), the English name Polyamide (abbreviated as PA), and its basic composition is aliphatic polyamide linked by amide bonds (-[NHCO]-). Commonly used nylon fibers can be divided into two categories. One type is polyhexamethylene adipate obtained by polycondensation of diamine and diacid. The chemical structure formula of its long-chain molecule is: H-[HN(CH 2 )XNHCO(CH 2 )YCO]-OH, the other is obtained by polycondensation or ring-opening polymerization of caprolactam, and the chemical structural formula of its long-chain molecules is: H-[NH(CH2)XCO]-OH. The moisture absorption and dyeing properties of nylon are better than those of polyester. It is alkali resistant but not acid resistant, a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F6/90D01F1/10C08G69/16C08G69/14
CPCC08G69/14C08G69/16D01F1/10D01F6/90
Inventor 赵岭余志林敏吉鹏王华平陈向玲方运华
Owner 江苏恒创园区管理服务有限公司
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