Production method of polyamide-6 fiber

A production method and technology of nylon, which is applied in the production field of nylon 6 fiber, can solve the problems such as the air blowing is easy to be distorted and the cooling performance is not good, so as to achieve good spinning cooling effect, good market competitiveness, and avoid uneven cooling Effect

Active Publication Date: 2015-07-29
光山县群力化纤有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Chinese patent ZL201220462989.4 discloses a new type of ring blowing device, which is different from the traditional new type of ring blowing device in that the cooling air blown in from the air inlet pipe runs upwards under the obstruction of the inner cylinder, and is rectified and evened by the double-layer flat screen. After the action, it finally enters the surrounding blower. Its advantage over the prior art is that it can make the cooling air in the surrounding blower more uniform. The disadvantage is that the cooling performance is not good. With the spinning down at a high speed, the surrounding blowing is easy The belt is skewed, especially the cooling effect is not good in the ejection section of the primary fiber, so it needs to be improved

Method used

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  • Production method of polyamide-6 fiber
  • Production method of polyamide-6 fiber
  • Production method of polyamide-6 fiber

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Experimental program
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Effect test

Embodiment 1

[0028] The production method of the nylon 6 fiber described in the present embodiment may further comprise the steps:

[0029] a. Add nylon 6 chips into the screw extruder for melt extrusion;

[0030] b. Transport the molten mixed melt to the spinning box, and extrude the melt into the spinning assembly through the metering pump for spinning;

[0031] c. Use the ring blowing spinning cooling device to cool and shape the tow with ring blowing, and then oil the cooled tow. In the ring blowing cooling device, the ring blowing of the tow is divided into upper and lower Two layers and independent of each other, the upper ring air blows out obliquely upwards, the lower ring air is the main body, blows out horizontally from the ring blower, and the temperature and temperature of the upper ring air are lower than the lower ring air;

[0032]d. Pre-network the oiled tow through the tunnel and the wire gate, then draft the tow with cold rollers and hot rollers, add the drawn tow to the...

Embodiment 2

[0038] The production method of nylon 6 fiber described in this embodiment is different from Example 1 in that the control parameters are different: in the step a, the heating zones of the screw extruder are six, and the temperature is 262° C. in the first zone, and 262° C. in the second zone. zone 268°C, zone three 268°C, zone four 268°C, zone five 268°C, zone six 268°C, the melt pressure is 12.5Mpa; the temperature of the spinning box in the step b is 270°C; the step c The air blowing temperature of the middle and upper rings is 19.5°C, the speed is 0.5m / s, and the humidity is 78%. The temperature of the lower ring blowing is 20°C, the speed is 0.5m / s, and the humidity is 80%. In the step d, two cold rolls are used for drafting first, and then two hot rolls are used for drafting. The temperature of the hot rolls is 170° C., the drafting speed is 1.1, and the winding speed is 4200 m / min.

Embodiment 3

[0040] The production method of nylon 6 fiber described in this embodiment is different from Example 2 in that the control parameters are different: in the step a, there are six heating zones of the screw extruder, and the temperature is 261° C. in the first zone and 261° C. in the second zone. zone 267°C, zone three 267°C, zone four 267°C, zone five 267°C, zone six 267°C, the melt pressure is 12Mpa; the temperature of the spinning box in the step b is 267°C; the step c The air blowing temperature of the middle and upper rings is 18°C, the speed is 0.4m / s, and the humidity is 70%. The temperature of the lower ring blowing is 18.5°C, the speed is 0.4m / s, and the humidity is 75%. In the step d, two cold rolls are used for drafting first, and then two hot rolls are used for drafting. The temperature of the hot rolls is 160° C., the drafting speed is 1.1, and the winding speed is 4100 m / min.

[0041] The nylon 6 fiber performance parameter that makes in above-mentioned three embod...

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Abstract

The invention discloses a production method of polyamide-6 fiber. The production method comprises the following steps: a, adding polyamide-6 chips to a screw extruder, and carrying out melted extrusion; b, spinning; c, carrying out cooling forming on silk bundles by using cross air blow by using a cross air blow spinning cooling device and oiling the cooled silk bundles, wherein the cross air blow to the silk bundles in the cross air blow spinning cooling device is divided into an upper layer and a lower layer which are independent of each other, wherein the upper layer of cross air blow is obliquely blown out upwards, and the lower layer of cross air blow is taken as a main body and horizontally blown out from a cross air blow cylinder; d, carrying out pre-interlacing, drafting, interlacing and winding; e, carrying out inspection package. According to the production method disclosed by the invention, the cross air blow is adopted to substitute for side air blow, so that a melt is uniformly cooled in each direction; the phenomenon that the inner layers and the outer layers of the silk bundles cannot be uniformly cooled is effectively avoided, and the unevenness rate of the silk bundles is reduced, so that the molding quality of the silk bundles is greatly improved; the polyamide-6 fiber prepared by the production method disclosed by the invention is excellent in various performances and has favorable market competitiveness.

Description

technical field [0001] The invention relates to a production method of chemical fibers, in particular to a production method of nylon 6 fibers. Background technique [0002] The main species of nylon is aliphatic polyamide fiber, which can be synthesized from a monomer, such as lactam or amino acid. At this time, the Arabic numerals after the nylon name indicate the number of carbon atoms of the lactam or amino acid used, such as nylon 6, nylon 66, etc. Nylon 6 is polycaprolactam fiber. This concept was disclosed on page 412 of the second printing of the first edition of "Chemical Fiber Dictionary" in 1995: polycaprolactam fiber is referred to as polycaprolactam fiber in my country. Filament, textured filament and short fiber, etc., are produced by melt direct spinning or chip spinning. Nylon 6 products have the characteristics of high strength, wear resistance, softness and gentle skin touch, etc., and have broad applications in the fields of clothing, silk, umbrellas, fi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01D5/08D01D5/092D01D5/084D01D5/16
CPCD01D5/092D01D13/00
Inventor 包成松沈浙皓王银华
Owner 光山县群力化纤有限公司
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