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, 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

[0029] 6 parts of Na 2 CO 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 3.6cN / dtex and its elongation at break is 30%.

Embodiment 2

[0031] Use the twin-screw extruder to prepare LiCl additive masterbatch according to the ratio in Table 1, where the temperature of each zone of the extruder is: 260°C for zone I; 305°C for zone II; 290°C for zone III; 290°C for zone IV .

[0032] ingredients

parts by mass

Nylon 6 slices

80

Metal salt LiCl

20

Antioxidant (Antioxidant 1010 / Antioxidant 168)

1

[0033] The obtained LiCl additive masterbatch and nylon 6 slices were 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.

[0034] Then mix the additive masterbatch of LiCl with nylon 6 slices 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 machine by a metering pump. Parts, through the spinneret hole on the spinneret, the mel...

Embodiment 3

[0036] Use the twin-screw extruder to prepare NaBr additive masterbatch according to the ratio in Table 2, where the temperature of each zone of the extruder is: 260°C for zone I; 305°C for zone II; 290°C for zone III; 290°C for zone IV .

[0037] ingredients

parts by mass

Nylon 6 slices

80

Metal salt NaBr

60

[0038] Dry the obtained NaBr additive masterbatch and nylon 6 chips 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.

[0039] Then mix the NaBr additive masterbatch and nylon 6 chips with a weight ratio of 1:100, heat and melt, and the melt is extruded by a screw extruder and then sent to the spinning machine, and the melt is quantitatively pressed into the spinning part by a metering pump , the melt flows out in a thin filament state through the spinneret hole on the spinneret plate, and is wound with oil to obtain a coiled ...

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Abstract

The present invention discloses a method for preparation and production of textile material, especially to a process for low temperature production of nylon fibre. The present invention adopts a melt spinning process and comprises the steps of adding chemical compounds of the first main group metals during the nylon melt spinning 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, find wide use in industries such as garments and intertexture.

Description

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

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F6/60D01F1/10D01D5/08
Inventor 来国桥刘玉峰章成峰邱化玉吴燕婕伍川刘毓海黄昆刘少轩陆达天李慧珍张秀芹李龙波王明超赵莹潘庆华王笃金徐怡庄吴瑾光徐端夫
Owner HANGZHOU NORMAL UNIVERSITY
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