Low temperature producing method for nylon fiber

A technology of nylon fiber and nylon, applied in the direction of fiber chemical characteristics, melt spinning method, single-component polyamide artificial filament, etc., can solve the problems of high process requirements, high energy consumption, and large energy consumption, so as to reduce costs, Effects of reduced energy consumption and improved safety

Inactive Publication Date: 2007-10-17
HANGZHOU NORMAL UNIVERSITY +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

[0030] 6 parts of KAl(SO 4 ) 2 Heat 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 220°C, 245°C, 245°C, and 250°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 was 3.9 cN / dtex and its elongation at break was 30%.

Embodiment 2

[0032] Prepare NaCl and LaCl using a twin-screw extruder according to the ratio in Table 1 3 The additive masterbatch of the mixture, wherein the temperature of each zone of the extruder is respectively: 260°C, 305°C, 290°C and 290°C.

[0033] ingredients

parts by mass

Nylon 6 slices

80

Metal salt NaCl+LaCl 3

10 each

Antioxidant (Antioxidant 1010 / Antioxidant 168)

1

[0034] The resulting NaCl and LaCl 3 The mixture of additive masterbatches 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 NaCl and LaCl 3 The additive masterbatch of the mixture is mixed with nylon 6 chips at a weight ratio of 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. Th...

Embodiment 3

[0037] Use twin-screw extruder to prepare NaBr and CaCl according to the ratio in Table 2 2 Additive masterbatches for blends where the temperatures of the extruder zones are: 260°C, 305°C, 290°C and 290°C

[0038] ingredients

parts by mass

Nylon 6 slices

80

Metal salt NaBr+CaCl 2

30 each

[0039] The resulting NaBr and CaCl 2 The mixture of additive masterbatches 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.

[0040] Then NaBr and CaCl 2 The additive masterbatch of the mixture and nylon 6 slices are mixed, heated and melted at a weight ratio of 1:100. 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 the wire plate flow out the melt in a thin filament state, and the oil is...

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Abstract

The present invention discloses a technology field relating to the preparation method of textile materials, especially to a process for for low temperature production of nylon fibre. Said process comprises the steps of adding a mixture of metallic compounds during or before nylon melting course and then spinning the obtained molten mass at a low temperature of 160-250 DEG C. Adding auxiliaries of oxidation preventives, ultraviolet absorbents, light-stability agents and anstatic agents therein before the melting course or during the melting course will result in more excellent effects. The method has a lower energy consumption and a lower cost, and its industry operations are more convenient and safe, will find wide use in industries such as garments and intertexture.

Description

technical field [0001] The invention relates to the technical field of a textile material preparation method, 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 to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F6/60D01F1/10D01D5/08
Inventor 刘少轩来国桥邱化玉吴燕婕蒋剑雄章成峰刘毓海吴连斌黄昆李慧珍马清芳赵莹王笃金徐怡庄吴瑾光许文东刘玉峰齐剑李龙波李文清王明超李维红徐端夫
Owner HANGZHOU NORMAL UNIVERSITY
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