Nylon 6 slices for superfine sea-island fibers and manufacturing method thereof

A technology for sea-island fibers and a manufacturing method, which are applied in the field of nylon 6 slices for ultra-fine sea-island fibers and their manufacturing fields, can solve the problems affecting the uniformity of nylon 6 ultra-fine sea-island fibers, cannot guarantee the stability of melt viscosity, and the structure of ultra-fine sea-island fibers. Changes and other problems, to achieve the effect of reasonable ratio, good melt viscosity matching, and simple preparation process

Inactive Publication Date: 2011-09-28
WEIHAI HUAWANG NYLON CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Nylon 6 hydrolytic polymerization usually uses oxalic acid, adipic acid, etc. as end-capping agents to control the growth of molecular chains, ensure that its melt has a certain viscosity, and play a role in regulating molecular weight, but it cannot guarantee that nylon 6 slices will be in contact with polymer. The stability of the melt viscosity caused by the thermo-oxidative degradation of ethylene (1I50A) blend spinning causes the structure change of ultra-fine sea-island fibers, which affects the uniformity of nylon 6 ultra-fine sea-island fibers and the stability of product quality.

Method used

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  • Nylon 6 slices for superfine sea-island fibers and manufacturing method thereof
  • Nylon 6 slices for superfine sea-island fibers and manufacturing method thereof
  • Nylon 6 slices for superfine sea-island fibers and manufacturing method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0013] Add adipic acid, water, diaminodiphenylmethane, and isophthaloyldipiperidinamide in a ratio of 3:50:4.6:20, and melt them in a stainless steel container with a stirrer at 92-95°C, and then stir evenly. A mixed solution of additives is prepared.

[0014] The mixed solution of caprolactam solution and the above-mentioned additives is measured by a metering pump at a ratio of 1000:8, and then fed into a continuous polymerization reaction vessel for pre-pressurization polymerization-depressurization polymerization through a static mixer to carry out polymerization reaction. Under the conditions of pre-polymerization temperature 250-270°C and post-polymerization temperature 230-250°C, polymerize for 13-17 hours to obtain nylon 6 resin for ultra-fine island-in-the-sea fibers, and then the polymerized melt is continuously extruded into strips through a melt metering pump , pelletizing, continuous extraction, and continuous nitrogen drying to obtain nylon 6 slices for ultrafine...

Embodiment 2

[0016] Add adipic acid, water, diaminodiphenylmethane, and isophthaloyl dipiperidinium in a ratio of 2:50:5.5:30, and melt in a stainless steel mixing vessel with a stirrer at 92-95°C, then stir evenly , to prepare a mixed solution of additives.

[0017] A certain amount of caprolactam solution and the above auxiliary agent mixed solution are metered by a metering pump at a ratio of 1000:8.9, and then put into a continuous polymerization reactor for pre-pressurization polymerization-decompression polymerization polymerization through a static mixer to carry out polymerization reaction. Under the conditions of pre-polymerization temperature 250-270°C and post-polymerization temperature 230-250°C, polymerize for 13-17 hours to obtain nylon 6 resin for ultra-fine island-in-the-sea fibers, and then the polymerized melt is continuously extruded into strips through a melt metering pump , pelletizing, continuous extraction, and continuous nitrogen drying to obtain nylon 6 slices for ...

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Abstract

The invention belongs to the field of spinning slices, and particularly relates to nylon 6 slices for superfine sea-island fibers and a manufacturing method thereof. The nylon 6 slices are formed by polymerizing caprolactam and an aid in a ratio of 1,000:(7-10), wherein the aid is prepared from a dicarboxylic acid end-capping reagent, water, an amine end-capping reagent and isophthaloyl dipiperidino amine according to a ratio of (3-6):(40-60):(3-6):(10-40). The method is simple in a preparation process, high in operability, reasonable in proportioning of each component and accurate in process control in the polymerization process, and the compounded end-capping reagents are adopted, so the nylon 6 slices for the superfine sea-island fibers are high in matching with polyethylene melt viscosity and stable in performance and have a wide market prospect.

Description

technical field [0001] The invention belongs to the field of spinning chips, and in particular relates to a nylon 6 chip for superfine island-in-the-sea fibers and a manufacturing method thereof. Background technique [0002] As a member of the microfiber family, the superfine sea-island fiber is gradually accepted by textile and non-woven enterprises and synthetic leather enterprises due to its excellent performance. The suede, jeanette, cleaning cloth, super Fine fiber base cloth is favored by consumers at home and abroad. Due to the increase in oil prices and the cost of chemical fiber raw materials in recent years, the profit margin of traditional chemical fibers has become smaller. Because of its high value-added and high profit characteristics, ultra-fine sea-island fibers have prompted a large number of domestic enterprises to enter this industry. At present, most of the nylon 6 chips used to make nylon 6 microfibers are ordinary spinning chips. The biggest deficienc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G69/36D01F8/12D01F8/06
Inventor 王祖桥王敦志王振海宋仕祥宋宗杰
Owner WEIHAI HUAWANG NYLON CHEM
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