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Preparation method of high strength polyethylene fiber and special device thereof

A technology of high-strength polyethylene and a manufacturing method, which is applied in the directions of flash spinning, drawing spinning, artificial filament heat treatment, etc., can solve the problem that organic solvents are not easy to volatilize and clean, it is difficult to increase the spinning speed, and the drafting hair is prone to occur. It can shorten the production time, improve the safety and reliability, and save the production cost.

Active Publication Date: 2011-10-26
JIANGSU LIUJIA TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the actual production process, since the fine flow of the solution enters the solidification of the second temperature control zone after passing through the longitudinal stretching rheology of the first temperature control zone, it forms a dry precursor that meets high-power drafting, which makes the drying The speed is too slow, so it is difficult to increase the spinning speed of this part; moreover, the same as the patent 01123737.6, the thin liquid stream extruded from the spinneret is surrounded by a thick volatile solvent layer, so that the organic in the fiber filaments The solvent is not easy to volatilize and clean, and it also affects the final performance index of the fiber, and it is prone to draft wool, which reduces the quality of the fiber

Method used

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  • Preparation method of high strength polyethylene fiber and special device thereof
  • Preparation method of high strength polyethylene fiber and special device thereof
  • Preparation method of high strength polyethylene fiber and special device thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Example 1: Add 47.5 kg of commercially available decahydronaphthalene solvent (industrial grade) into a stainless steel reactor, turn on the stirring device at a stirring speed of 150 rpm, heat the temperature of the reactor to 90°C, and form a fiber with a molecular weight of 5 million 2.5 kg of polymer polyethylene and 12.5 g of calcium stearate, a spinning aid, were added slowly, stirred and mixed for 2.5 hours; then dissolved and extruded through a twin-screw dissolving machine, the temperature inside the twin-screw was 170°C, and the speed of the twin-screw was 200 rpm minute. After being filtered by the filter, it is pumped into the spinneret 3 by a metering pump, and the formed liquid stream 4 (ie fiber tow) enters the flash heating zone. The special device arranged in the flash heating zone below the spinneret 3 includes a spiral pipeline 1 with circulating heating oil inside; the spiral pipeline 1 is arranged in the spinning shaft 2 below the spinneret 3; the s...

Embodiment 2

[0028] Embodiment 2: 66.4 kilograms of commercially available decahydronaphthalene solvents (technical grade) are added in the stainless steel reactor, the stirring device is turned on, the stirring speed is 250 rpm, and the molecular weight is 3.5 million fiber-forming polymer polyethylene 5 kilograms and spinning Slowly add 25 grams of silk additive calcium stearate, stir and mix for 0.5 hours, then add to the screw mixer, the temperature inside the screw is 100 ° C, the screw speed is 100 rpm, after mixing, a uniform suspension is formed in a container, and then Dissolved and extruded by a twin-screw dissolving machine, the temperature inside the twin-screws is 160°C, and the rotational speed of the twin-screws is 250 rpm. After filtering through the filter, pump it into the spinneret 3 with a metering pump, and the formed liquid trickle 4 enters the flash heating zone; a special device arranged in the flash heating zone below the spinneret 3 (the structure is the same as th...

Embodiment 3

[0029] Embodiment 3: 117.5 kilograms of commercially available decahydronaphthalene solvents (industrial grade) are added in the stainless steel reactor, the stirring device is turned on, the stirring speed is 200 rpm, and the molecular weight is 4 million fiber-forming polymer polyethylene 7.5 kilograms and spinning Slowly add 37.5 grams of calcium stearate as a silk aid, stir and mix for 0.5 hours, then add to the screw mixer, the temperature inside the screw is 110°C, the screw speed is 150 rpm, after mixing, a uniform suspension is formed in a container, and then Dissolved and extruded by a twin-screw dissolving machine, the temperature inside the twin-screws is 165°C, and the rotational speed of the twin-screws is 180 rpm. After being filtered by the filter, pump it into the spinneret with a metering pump, and the formed liquid trickle 4 enters the flash heating zone; the special device (the structure is the same as in Example 1) arranged in the flash heating zone below th...

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Abstract

The invention provides a preparation method of high strength polyethylene fiber and a special device thereof. The preparation method comprises the following steps: fibre-forming polymer polyethylene and organic solvent are mixed with spinning aid, the mixture is dissolved to form organic solution, then the organic solution is extruded from a spinneret, liquid trickles enter a flashing heating area below the spinneret to ensure that the organic solvent in the liquid trickles is flashed fast, polyethylene is taken from the gap of spiral pipes of the special device arranged in the flashing heating area to form solid precursor with a fibrillated superfine reticular fiber structure; and the precursor performs hot drawing to prepare the high strength polyethylene fiber with the reticular structure. As the preparation method adopts the flashing technology and the special device, the problem of the prior art that the solvent in strand silk is difficult to volatilize owning to thick volatile solvent layer, can be effectively solved; and the process flow is shortened, the industrialized production is easy to realize, the production efficiency is increased and the product quality of the high strength polyethylene fiber can be ensured.

Description

technical field [0001] The invention relates to a method for manufacturing high-strength polyethylene fibers and a special device thereof. Specifically, what the present invention relates to is a kind of utilizing flash spinning technology method, through special-purpose open-type spiral pipeline heating device, makes the organic solvent in the organic liquid thin flow extruded from the spinneret suddenly flash quickly, It is a method of forming high-strength polyethylene fibers by forming solid precursors of fibrillated ultrafine network fiber structure, and then undergoing one or more steps of thermal stretching. Background technique [0002] High-strength polyethylene fiber has excellent properties such as light weight, high strength, non-water absorption, excellent wear resistance, outstanding impact resistance, good low temperature creep resistance, and excellent chemical corrosion resistance. One of the high-performance fiber materials. It has extremely broad applica...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01D5/11D01D5/12D01D10/02D01D10/06
Inventor 郭子贤张腊梅张竹标王华平项朝阳王新鹏罗晓娟
Owner JIANGSU LIUJIA TECH CO LTD
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