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Method for preparing high-strength eight-head spinning polyamide-6 lower-middle denier full-drawn yarns

A fully drawn yarn, high-strength technology, applied in melt spinning, stretch spinning, textiles and papermaking, etc., can solve the problems of high cost, low efficiency of low-denier nylon 6, poor product quality, etc., and achieve relative strength high effect

Inactive Publication Date: 2013-11-27
JIANGSU HAIYANG CHEM FIBERS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the problems of low efficiency, high cost and poor product quality in the production of medium and low denier nylon 6 by the existing process, the present invention proposes a method for preparing high-strength 8-end spun nylon 6 medium and low denier full-drawn yarn, which can improve production Efficiency, draft ratio, fiber strength

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0017] The invention provides a method for preparing high-strength 8-end spun nylon 6 medium and low-denier fully drawn yarn, which has the following steps:

[0018] 1. Nylon 6 slices enter the screw extruder through the silo to make the slices melt;

[0019] 2. The above-mentioned molten material is pressed into the spinning box through the melt pipeline, and ejected from the spinneret to form a tow in the small silk chamber;

[0020] 3. The tow is cooled by the small wire chamber and further cooled through the tunnel;

[0021] 4. The cooled tow is oiled through the oil nozzle;

[0022] 5. The oiled tow enters the feeding roller through the thread guide and the splitting rod, and then enters the winding machine after being drawn and shaped by the hot roller.

[0023] The process of the present invention can be briefly described as: dried slices→spinning silo→screw extruder→discharge head→melt pipe→spinning box→side blowing device with monomer suction pipe→oiling Device → feeding roller...

specific Embodiment approach

[0025] The specific implementation of the present invention is as follows: First, nylon 6 slices are fed into a screw extruder with electric heating function through a silo, so that the slices are melted and become spinning melt. The control of the heating temperature of the extruder is best divided into 5-6 zones, and the temperature of each zone is controlled between 270-280℃. The temperature of each zone needs to be adjusted according to the actual situation.

[0026] The melt is extruded from the extruder through the melt pipeline, is quantitatively pressed into the spinning assembly through the metering pump, and ejected from the spinneret to form a tow in the spinning box. The melt pipeline and spinning box are insulated by circulating biphenyl steam, and the temperature is controlled between 275 and 285°C. The spinneret holes are in a diamond shape with 20~26 holes evenly distributed on the left and right sides, the diameter is 0.3~0.4mm, the aspect ratio is between 2~3, ...

Embodiment 1

[0032] Using the method of the present invention to produce 210D nylon 6 fully drawn yarn, the specific steps are as follows:

[0033] 1. Slice melting: Nylon 6 slices enter the screw extruder with electric heating function through the silo, so that the slices are melted and become spinning melt. The extruder is divided into 5 zones, and the temperature of each zone is controlled between 270~280℃.

[0034] 2. Spinning: The melt is extruded from the extruder through the melt pipeline, quantitatively pressed into the spinning assembly by the metering pump, and ejected from the spinneret to form a tow in the spinning box. The melt pipeline and spinning box are insulated by circulating biphenyl steam, and the temperature is controlled at about 282°C. The spinneret holes are diamond-shaped with 24 holes evenly distributed on the left and right sides, with a diameter of 0.4mm, a length-to-diameter ratio of 2:1, a hole spacing of 10mm, and a spacing of 30mm between the left and right hol...

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Abstract

The invention relates to a method for preparing high-strength eight-head spinning polyamide-6 lower-middle denier full-drawn yarns. The method comprises the following steps that (1), a polyamide-6 slice enters a screw extruder through a stock bin, and the slice is made to be in a fusion state; (2), the slice in the fusion state is pressed into a spinning box through a fused material pipeline, is sprayed out through a spinneret plate, and forms tows in a small yarn chamber; (3), the tows are cooled in the small yarn chamber and pass a channel to be further cooled; (4), oil is fed to the cooled tows through an oil nozzle; (5), the oiled tows enter a feeding roller through a yarn guide and a yarn dividing bar, and then enter a coiler to be coiled after being drawn and shaped through a heat roller. The invention belongs to the spinning technology of chemical fibers. By means of the method, the production efficiency, the drawing multiplying power and the fiber strength are improved.

Description

Technical field [0001] The invention relates to a spinning process of chemical fibers, in particular to a method for preparing high-strength 8-end spun nylon 6 medium and low denier fully drawn yarns. Background technique [0002] With its superior performance, nylon 6 medium and low denier industrial yarns are widely used in fishing nets, ropes, luggage belts, sewing threads, airbags, outdoor sports goods, etc. The product has high added value and the market is very broad. Generally, low-density industrial yarns are produced by two-step spinning, which has low production efficiency, high cost, and poor product quality. [0003] In recent years, some companies have tried to use conventional nylon 6 one-step equipment to carry out technological transformation and develop eight-end spun nylon 6 medium and low denier industrial yarns, but the quality is unstable and the production waste rate is high. Summary of the invention [0004] In order to overcome the problems of low efficiency...

Claims

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Application Information

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IPC IPC(8): D01D5/08D01D5/088D01D5/12
Inventor 沈家广孔令根王琳高琦
Owner JIANGSU HAIYANG CHEM FIBERS
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