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Low temperature producing method for nylon fiber

A technology of nylon fiber and nylon, which is applied in the field of textile materials, can solve problems such as high process requirements, high energy consumption, and large energy consumption, and achieve the effects of reducing costs, reducing energy consumption, and improving safety

Inactive Publication Date: 2007-10-17
HANGZHOU NORMAL UNIVERSITY
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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] 5 parts GaCl 3 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, 230°C, 230°C, and 235°C, and the spinning temperature is 220°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 3.7cN / dtex and its elongation at break is 30%.

Embodiment 2

[0032] Prepare SnCl using a twin-screw extruder according to the ratio in Table 1 2 Additive masterbatch, where the temperature of each zone of the extruder is: 255°C for zone I; 300°C for zone II; 290°C for zone III; 290°C for zone IV.

[0033] ingredients

parts by mass

Nylon 6 slices

80

Metal salt SnCl 2

30

Antioxidant (Antioxidant 168)

1

[0034] The resulting SnCl 2 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 SnCl 2 The additive masterbatch and nylon 6 slices are mixed 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. The spinneret holes on the wire plate flow out the melt in a thin ...

Embodiment 3

[0037] Use the twin-screw extruder to prepare Bi according to the ratio of Table 2 2 o 3 Additive masterbatch, where the temperature of each zone of the extruder is: 265°C for zone I; 295°C for zone II; 280°C for zone III; 285°C for zone IV

[0038] ingredients

parts by mass

Nylon 6 slices

80

metal oxide Bi 2 o 3

50

[0039] Bi 2 o 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.

[0040] Then Bi 2 o 3 The additive masterbatch and nylon 6 chips 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 spinneret holes on the plate flow out the melt in a filament state, and the oil is wound to obtain a coiled wire. The temperature of the melt in each zone of the screw extruder is 230°C, 240...

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Abstract

The present invention discloses a technology field belonging to the preparation method of textile materials, especially relating to a process for low temperature production of nylon fibre.Said process comprises the steps of adding a chemical compound of the third or fourth or fifth main group metals 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 nylon fibre loomage prepared in accordance with the present invention is characterized by its absorbing sweat, lightweight, excellent toughness, rebound resilience and anti-acid alkali and the like. 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 textile materials, 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 resili...

Claims

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Application Information

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IPC IPC(8): D01F6/60D01F1/10D01D5/08
Inventor 蒋剑雄徐怡庄邱化玉来国桥黄昆吴燕婕邬继荣章成峰刘毓海刘少轩李慧珍刘玉峰蒋可志张秀芹陆达天李龙波王明超赵莹王笃金吴瑾光华西林杨展澜徐端夫
Owner HANGZHOU NORMAL UNIVERSITY