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Process for producing nylon fibre under low temperature

A nylon fiber, nylon technology, applied in the textile field, can solve the problems of high process requirements, high energy consumption, large energy consumption, etc., and achieve the effects of reducing costs, reducing energy consumption, and improving safety

Inactive Publication Date: 2010-01-13
PEKING UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At this time, in order to keep the nylon in a molten state, it needs to be continuously heated, which will consume a lot of energy, especially the spinneret or spinneret of the spinning equipment, the temperature is generally as high as 280 ° C, and biphenyl is generally used in practice. Heating it, the boiling point of biphenyl is about 265°, so it is necessary to increase the boiling point of biphenyl to avoid its boiling and vaporization, which not only requires high energy consumption, but also requires pressure-resistant equipment
These factors make the production of nylon fibers expensive and process-demanding using existing melt-spinning methods

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] 6 parts of LaCl 3Heat and melt together with 100 parts of nylon 6 slices, the melt is extruded by a screw extruder and sent to the spinning machine, the melt is quantitatively pressed into the spinning part by a metering pump, and the melt is sprayed through the spinneret holes on the spinneret The body flows out in a filament state, and is oiled and wound to obtain a coiled wire. The temperatures of the melt in each zone of the screw extruder are 230°C, 250°C, 250°C, and 255°C, and the spinning temperature is 230°C. The hole diameter of the spinneret used is 0.35 mm, the length is 0.7 mm, and the winding speed is 1000 m / min. The fineness of the obtained winding yarn was 8 deniers, and the thermal drawing was performed 3.7 times at a temperature of 120° C. to obtain nylon 6 fibers with a fineness of 3 deniers. Its strength is 3.8cN / dtex and its elongation at break is 30%.

Embodiment 2

[0031] Prepare EuCl using a twin-screw extruder according to the ratio in Table 1 3 Additive masterbatch, where the temperatures of each zone of the extruder are: 260°C, 305°C, 290°C and 290°C.

[0032] Table 1: Containing EuCl 3 additive masterbatch formula

[0033] ingredients

parts by mass

Nylon 6 slices

80

Metal salt EuCl 3

20

Antioxidant (Antioxidant 1010 / Antioxidant 168)

1

[0034] The resulting EuCl 3 The additive masterbatch and nylon 6 chips are dried in a vacuum oven to remove moisture and small molecular substances. The drying temperature is between 90-100°C, and the drying time is 24-48 hours.

[0035] Then EuCl 3 The additive masterbatch and nylon 6 slices are mixed at a weight ratio of 4.5:1000 for heating and melting. The melt is extruded by a screw extruder and then sent to the spinning machine. The melt is quantitatively pressed into the spinning part by a metering pump. The spinneret holes on ...

Embodiment 3

[0037] Use twin-screw extruder to prepare Tb (acetylacetone) according to the ratio of table 2 3 Additive masterbatch, where the temperatures of each zone of the extruder are: 265°C, 300°C, 290°C and 290°C.

[0038] Table 2: Containing Tb (Acetylacetone) 3 additive masterbatch formula

[0039] ingredients

parts by mass

Nylon 6 slices

80

Metal salt Tb (acetylacetonate) 3

40

[0040] The resulting Tb (acetylacetone) 3 The additive masterbatch and nylon 6 chips are dried in a vacuum oven to remove moisture and small molecular substances. The drying temperature is between 90-100°C, and the drying time is 24-48 hours.

[0041] Then Tb(acetylacetone) 3 The additive masterbatch and nylon 6 slices are mixed and heated at a weight ratio of 2:100, and the melt is extruded by a screw extruder and then sent to the spinning machine. The melt is quantitatively pressed into the spinning part by a metering pump, and the spinning The spinne...

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Abstract

The invention discloses a method for producing nylon fiber under low temperature, which includes adding a rare-earth metal compound before or when the nylon is in melted state and conducting the spinning of the molten mass under low temperature between 160 DEG C and 250 DEG C. The energy consumption and cost of the method are low with more convenient and safer industrial operations.

Description

technical field [0001] The invention relates to the technical field of textiles, in particular to a method for producing nylon fibers at low temperature. Background technique [0002] Generally speaking, the polymer materials that can be spun include nylon (polyamide), polypropylene (polypropylene), polyester (polyethylene terephthalate) and acrylic (polyacrylonitrile). These materials can be spun to form filaments for use in the textile industry. Melt spinning is a commonly used spinning method, and fiber filaments suitable for spinning can be obtained by melt spinning. Generally, fiber filaments obtained by the melt spinning method can reach a fineness degree (fineness) of several deniers. The products obtained by weaving and weaving with such fiber filaments, such as clothing fabrics, have many advantages, so the market application space is broad. [0003] Nylon fiber fabric has the characteristics of sweat absorption, light weight, good toughness, good resilience, aci...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01F1/10D01F6/60D01D5/08
Inventor 黄昆蒋剑雄章成峰来国桥刘毓海丘化玉刘少轩徐端平李慧珍倪勇刘玉峰陆达天李龙波马清芳伍川王明超潘庆华郝超伟赵莹王笃金李维红杨展澜徐怡庄吴瑾光徐光宪徐端夫
Owner PEKING UNIV
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