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Preparation method of low-melting-point hot-melting tynex

A hot-melt, low-melting technology, used in filament forming treatment, bundling of newly sprayed filaments, stretching spinning, etc., can solve the problem of immature technology, etc. Not easy to break ends, the effect of smooth spinning process

Inactive Publication Date: 2012-07-11
瑞安市瑞邦针纺科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] But for nylon fibers, the technology to run the melt direct spinning method is not very mature

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0014] The preparation method of the low-melting hot-melt nylon filament includes the process steps of drying nylon slices, spinning, stretching and winding. The following is a specific description of nylon yarn as an example:

[0015] Undried nylon chips, the moisture contained in them will undergo vaporization and hydrolysis in the high-temperature molten state, thereby reducing the molecular weight of the polymer, which is manifested by a decrease in viscosity and a decrease in the strength of the product. In addition, due to the air bubbles formed by the vaporization of water, it will cause spinning breakage or burrs. Therefore, in order to obtain low-melting-point hot-melt nylon filaments with good performance, one of the key points is to fully dry the chips before spinning, so that the moisture content of the chips can be reduced to below 0.03%. This process is extremely critical. However, since the softening point of low-melting nylon chips is much lower than the boili...

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PUM

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Abstract

The invention discloses a preparation method of low-melting-point hot-melting tynex, which is characterized by including process steps of slicing,drying,spinning,drawing nylon, and the like. In the drying step, drying temperature ranges from 50 DEG C to 70 DEG C, and drying time ranges from 12 hours to 20 hours. In the spinning step, spinning is realized through a spinning screw, and the temperature of the spinning step is in different control in different areas, the temperature areas include a screw area, a metering pump area, a bend area and a spinning box area, wherein the temperature of the screw area ranges from 180 DEG C to 225 DEG C, the temperature in the spinning box ranges from 200 DEG C to 235 DEG C, and spinning speed is 500-800 meters per minute; spinning oil with weight ratio concentration of 20% is added during spinning, the temperature of a heating plate ranges from 45 DEG C to 55 DEG C and the forming temperature of a heating plate ranges from 55 DEG C to 65 DEG C during drawing, and the drawing magnification ranges from 3.2 to 3.6. The low-melting-pint hot-melting tynex prepared by the preparation method is not easy to break or to be fuzzy, is not easy to be loose, free of edge turned down after winding and smooth in spinning, and breakage strength and linear density thereof meet the requirements after weaving.

Description

technical field [0001] The invention relates to the field of spinning nylon materials, in particular to a method for preparing low-melting hot-melt nylon filaments. Background technique [0002] Generally speaking, the polymer materials that can be woven include nylon (polyamide), polypropylene, polyethylene terephthalate and polyacrylonitrile. These materials can be spun to form fibers such as nylon, polypropylene, polyester and acrylic, which can be used in the textile industry. Melt spinning is a commonly used spinning method, through which various fibers suitable for textiles can be obtained. Usually, the monofilament fineness of the fiber obtained by the melt spinning method can reach 1.0dtex. The products woven with such fineness fibers, such as clothing fabrics, have many advantages, so the market application space is broad. [0003] However, with the improvement of people's living standards, the requirements for textiles are getting higher and higher, and it is ve...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01D5/16D01D7/00D01D1/00
Inventor 吴瑞
Owner 瑞安市瑞邦针纺科技有限公司
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