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Cooling liquid tank, gel spinning method, fiber and high strength polyethylene fiber

A high-strength polyethylene and gel spinning technology, applied in fiber processing, spinneret assembly, filament/thread forming, etc., can solve the problem of insufficient performance of high-strength polyethylene fiber products

Active Publication Date: 2021-03-09
北京优力思创科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The invention at least partly solves the problem that the performance of existing high-strength polyethylene fiber products is still not high enough, and provides a cooling liquid tank, gel spinning method, fiber and high-strength polyethylene fiber that can further improve fiber strength

Method used

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  • Cooling liquid tank, gel spinning method, fiber and high strength polyethylene fiber
  • Cooling liquid tank, gel spinning method, fiber and high strength polyethylene fiber
  • Cooling liquid tank, gel spinning method, fiber and high strength polyethylene fiber

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0148] Select ultra-high molecular weight polyethylene with a weight-average molecular weight of 4.5 million and No. 7 white oil as raw materials, mix the two according to a feed ratio (mass ratio) of 10:90, and add 1% of the relative ultra-high molecular weight polyethylene quality simultaneously. 2,6-di-tert-butyl-p-cresol and aluminum stearate were stirred at 118°C for 4 hours, and the obtained slurry could be dissolved after cooling to room temperature in a medium storage tank with high-speed stirring.

[0149] Dissolving is extruded by a twin-screw extruder with a diameter of 65 mm and a length-to-diameter ratio of 68:1 to form a spinning solution. The rotation speed is 130 rpm, the initial temperature is 120°C, and the temperature is gradually raised to 300°C in 6 stages.

[0150] The extruded spinning solution is homogenized by a static mixer, filtered by a filter, and then sprayed out through a spinneret at a speed of 1m / min, a spinneret hole diameter of 0.7mm, and a le...

Embodiment 2

[0158] The method of this embodiment is similar to that of Embodiment 1, except that the weight average molecular weight of the ultra-high molecular weight polyethylene is 3.5 million.

[0159] The highest nozzle draw ratio of the spinning solution system is 28 times, and there are 3 "unwrapping peak points", the nozzle draw ratios are 2 times, 7 times and 15 times respectively, and the corresponding fiber tensile strength increases in turn The monofilament linear density decreases successively, and the fiber bundle obtained by 15 times nozzle stretching has the highest tensile strength, reaching 33.76cN / dtex, and the monofilament linear density is 1.23dtex, see the table below for details.

[0160] The performance of table 2, embodiment 2 fiber

[0161]

Embodiment 3

[0163] The method of this embodiment is similar to that of Example 1, except that the weight-average molecular weight of the ultra-high molecular weight polyethylene is 5.5 million, and the feed ratio of it to No. 7 white oil is 8:92.

[0164] The highest nozzle draw ratio of the spinning solution system is 50 times, and there are 5 "unwinding peak points". The nozzle draw ratios are 3 times, 7 times, 13 times, 21 times and 32 times respectively. The tensile strength increases sequentially, while the monofilament linear density decreases sequentially. Among them, the tensile strength of the fiber bundle obtained by stretching 32 times the nozzle is the highest, reaching 49.48cN / dtex, and the monofilament linear density is 0.51dtex. See the table below for details.

[0165] The performance of table 3, embodiment 3 fiber

[0166]

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Abstract

The invention provides a cooling liquid tank, a gel spinning method, fibers and high-strength polyethylene fibers, belonging to the technical field of high-strength fibers, which can at least partially solve the problem that the performance of existing high-strength polyethylene fiber products is still not high enough question. The cooling liquid tank of the present invention includes: a tank body for accommodating cooling liquid, and the cooling liquid is used to cool the spinning liquid ejected from the spinneret in gel spinning to form filament bundles; it is arranged in the tank body for cooling A cylindrical wire guide at a position below the liquid surface is used to make the tow pass through the side surface of the cylinder and change direction, and the diameter of the wire guide is 0.2-20 cm.

Description

technical field [0001] The invention belongs to the technical field of high-strength fibers and gel spinning preparation thereof, and in particular relates to a cooling liquid tank, a gel spinning method, fibers and high-strength polyethylene fibers. Background technique [0002] High-strength polyethylene fiber is the chemical fiber with the highest strength so far, and its tensile strength can reach more than 1.5 times that of carbon fiber and aramid fiber. It can be used for military and police protection (bulletproof UD cloth, bulletproof board, bulletproof helmet, cutproof gloves), Strength rope, wear-resistant gloves, cooling silk, fishing line, etc. High-strength polyethylene fibers are produced by gel spinning (gel spinning) method of ultra-high molecular weight polyethylene (UHMW-PE, ultra-high molecular weight polyethylene) with a weight average molecular weight of more than 3 million. Polyethylene is dissolved in a solvent to make a spinning solution, and then th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01D5/088D01D13/02D01D4/02
CPCD01D4/02D01D5/088D01D13/02D10B2321/021
Inventor 陈功林胡翠琼
Owner 北京优力思创科技有限公司