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Spinning polyamide 6 and manufacture method thereof

A manufacturing method, polyamide technology, applied in the direction of single-component polyester rayon, etc., can solve the problems of high fiber strength, low strength, and inflexibility, and achieve strong UV resistance, good thermal stability, and high strength high effect

Inactive Publication Date: 2017-06-30
FUJIAN ZHONGJIN NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve the above problems, Chinese patent CN 102675628 A discloses a bright nylon 6 slice spun at high speed, which is produced by polymerization of the following components: caprolactam, barium sulfate, molecular weight modifier and light stabilizer, and its weight percentage is: caprolactam 105 -110%, surface-treated barium sulfate 0.001-0.1%, molecular weight regulator 0.2-2%, light stabilizer 0.05-0.5%, the molecular weight regulator is C2-C18 linear alkyl or C4-C8 cycloalkyl, Any one of C6-C24 aromatic dicarboxylic acid, C4-C20 linear alkyl, C4-C8 cycloalkyl, C6-C24 aromatic diamine, the light stabilizer is 4-carboxy-2,2 ,6,6,-Tetramethylpiperidine or 4-amino-2,2,6,6,-Tetramethylpiperidine, the patent uses a single molecular weight regulator, there will be the following two situations: high fiber strength, not supple Or the fiber is soft, but the strength is not high, there is no way to achieve the two advantages of fiber smoothness and high fiber strength at the same time, and further improvement is needed

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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  • Spinning polyamide 6 and manufacture method thereof
  • Spinning polyamide 6 and manufacture method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Put 480kg of caprolactam, 20kg of desalted water, 1300g of adipic acid, 100g of terephthalic acid, and 250g of 4-amino-2,2,6,6-4 methylpiperidine into a static mixer and mix well. Put it into the pre-polymerization tower, react at 0.55MPa and 270°C for 2 hours, then add it to the main polymerization tower and react at 0.15MPa for 7 hours, control the reaction temperature at 250°C, and finally go through pelletizing, boiling water extraction and drying. High-speed spun chips with a relative viscosity of 2.60, 40 mmol / kg of terminal amino groups and 77 mmol / kg of terminal carboxyl groups can be obtained.

Embodiment 2

[0034] Put 480kg of caprolactam, 20kg of desalted water, 1200g of adipic acid, 200g of terephthalic acid and 250g of 4-amino-2,2,6,6-4 methylpiperidine into a static mixer and mix them evenly. Put it into the pre-polymerization tower, react at 0.55MPa and 270°C for 2 hours, then add it to the main polymerization tower and react at 0.15MPa for 6 hours, control the reaction temperature between 270°C, and finally go through pelletizing, boiling water extraction and drying. High-speed spun chips with a relative viscosity of 2.60, 41 mmol / kg of terminal amino groups and 76 mmol / kg of terminal carboxyl groups can be obtained.

Embodiment 3

[0036] 480kg caprolactam, 20kg desalted water, 1100g adipic acid, 300g terephthalic acid and 350g N,N'-bis(2,2,6,6-tetramethyl-4 piperidinyl)-1,3-benzene Diformamide is placed in a static mixer and mixed evenly, and the evenly mixed mixture is added to the prepolymerization tower, reacted at 0.55MPa and 255°C for 3h, and then added to the main polymerization tower for 10h at 0.10MPa, and the reaction temperature is controlled Always between 260°C. Finally, high-speed spinning chips with a relative viscosity of 2.60, 42 mmol / kg of terminal amino groups and 77 mmol / kg of terminal carboxyl groups can be obtained through pelletizing, boiling water extraction and drying.

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Abstract

Spinning polyamide 6 comprises the following raw materials, by mass part, 96-98 parts of caprolactam, 2-4 parts of desalted water, 0.28-0.3 part of a molecular weight control agent, and 0.05-0.15 part of a heat stabilizer, wherein the molecular weight control agent is any two of adipic acid, terephthalic acid and acetic acid, and the heat stabilizer is any one of 4-amino-2,2,6,6-4-methyl piperidine and N,N'-di(2,2,6,6-tetramethyl-4-piperidyl)-1,3-benzenedicarboxamide.

Description

technical field [0001] The invention belongs to the field of polyamide 6 modification, and in particular relates to a polyamide 6 used for spinning and a manufacturing method thereof. Background technique [0002] One of the trends in the development of chemical fiber textile technology is to continuously increase the spinning speed. The melt spinning speed of nylon 6 fiber, an important variety of chemical fiber, has grown from hundreds of meters per minute to several kilometers per minute. The obvious advantage of high-speed spinning is that it can greatly increase production efficiency and reduce unit cost, and the fibers produced by it have high physical stability and are suitable for post-processing such as texturing, so they are widely used. Nylon 6 high-speed spinning has extremely high requirements on spinning raw material slices. Viscosity, moisture, oligomer content, and inorganic additive content, uniformity, dispersibility and other factors will affect the spinn...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Application Information

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IPC IPC(8): C08G63/08C08G63/78D01F6/92D01F1/10
CPCC08G63/08C08G63/78D01F1/10D01F6/92
Inventor 易春旺吴道斌王子强张唯彭露
Owner FUJIAN ZHONGJIN NEW MATERIALS
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