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Method and equipment for preparing ultrahigh molecular weight polyethylene fibers

A technology of ultra-high molecular weight and polyethylene fibers, which is applied to the preparation of ultra-high molecular weight polyethylene fibers by melt spinning. The equipment field used in this method can solve the problems of high production cost and complicated production process, and achieve less equipment composition. , short process flow, continuous production effect

Inactive Publication Date: 2011-01-05
王庆昭
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The biggest disadvantage of the gel spinning method is that a large amount of flammable, explosive or even toxic solvents are used, the production process is complicated, and the production cost is high.

Method used

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  • Method and equipment for preparing ultrahigh molecular weight polyethylene fibers
  • Method and equipment for preparing ultrahigh molecular weight polyethylene fibers

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] After selecting 95 parts (parts by weight) of ultra-high molecular weight polyethylene with a viscosity average molecular weight of 3 million and 5 parts (parts by weight) of organic montmorillonite, they were mixed and granulated in a mixing type twin-screw extruder to produce A granular ultra-high molecular weight polyethylene / montmorillonite nanocomposite material is obtained, that is, a modified ultra-high molecular weight polyethylene raw material.

[0022] The ultra-high molecular weight polyethylene / montmorillonite nanocomposite material is melt-extruded in a Φ90 single-screw extruder. The outlet pressure of the pump, that is, the output pressure is 30MPa, and then a melt strip with a diameter of 4mm is formed through the spinning die. The melt strip is cooled with nitrogen in the cooling tunnel, the wind temperature is 20°C, the wind speed is 6m / s, and the godet roll is used for pre-drawing Stretching, the stretching ratio is 10 times to obtain as-spun silk, and...

Embodiment 2

[0024] After selecting 90 parts (parts by weight) of ultra-high molecular weight polyethylene with a viscosity-average molecular weight of 2.5 million and 10 parts (parts by weight) of organic montmorillonite, they were mixed and granulated in a mixing type twin-screw extruder to produce A granular ultra-high molecular weight polyethylene / montmorillonite nanocomposite material is obtained, that is, a modified ultra-high molecular weight polyethylene raw material.

[0025] The ultra-high molecular weight polyethylene / montmorillonite nanocomposite material is melt-extruded in a Φ90 single-screw extruder, the temperature of the extruder is 220°C or 260°C, the pressure is stabilized and pressurized by the melt pump, and the outlet pressure of the melt pump is That is, the output pressure is 10MPa, and then a melt strip with a diameter of 4mm is formed through the spinning die. The melt strip is cooled with nitrogen in the cooling tunnel, the wind temperature is 10°C, and the wind s...

Embodiment 3

[0027] After selecting 92 parts (parts by weight) of ultra-high molecular weight polyethylene with a viscosity average molecular weight of 1.5 million and 8 parts (parts by weight) of organic montmorillonite, they were mixed and granulated in a mixing type twin-screw extruder to prepare A granular ultra-high molecular weight polyethylene / montmorillonite nanocomposite material is obtained, that is, a modified ultra-high molecular weight polyethylene raw material.

[0028]The above ultra-high molecular weight polyethylene / montmorillonite nano-composite material is melt-extruded in a Φ90 single-screw extruder, the temperature of the extruder is 100°C, 180 or 220°C, and the melt pump is used to stabilize and pressurize the melt. The outlet pressure of the pump, that is, the output pressure is 50MPa, and then a melt strip with a diameter of 6mm is formed through the spinning die, and the melt strip is cooled with nitrogen in the cooling tunnel, the wind temperature is 35°C, the wind...

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Abstract

The invention discloses a method and equipment for preparing ultrahigh molecular weight polyethylene fibers. The method comprises the following steps of: blending and melting ultrahigh molecular weight polyethylene and a modifier to prepare a granular or powdery modified ultrahigh molecular weight polyethylene raw material; melting and extruding the raw material by using an extruder to form melt of which a flow rate is 0.01 to 0.2 grams per 10 minutes, feeding the melt to a spinning mould by using a melt pump to form melt strips, and cooling and pre-stretching the melt strips to obtain primary yarns; and stretching the primary yarns in a plurality of stages to obtain the ultrahigh molecular weight polyethylene fibers. The equipment comprises the extruder, the melt pump, the spinning mould, a cooling channel, a three-roller tractor, a primary hot-stretching box, a first seven-roller tractor, a secondary hot-stretching box, a second seven-roller tractor, a rinsing trough, a drying box and a winder which are arranged sequentially. The method and the equipment have the characteristics of continuous production capability, relatively shorter process flow, relatively fewer equipment components, no need of solvent, low production cost and the like.

Description

technical field [0001] The invention belongs to the technical field of polymer material preparation, in particular to a new method for preparing ultra-high molecular weight polyethylene fiber by melt spinning method and the equipment used in the method. Background technique [0002] Ultra-high molecular weight polyethylene fiber is one of the three high-tech fibers. It is the fiber with the highest specific strength that has been commercially produced. It is mainly used in safety protection, aviation, weapons, sports and other fields. Ultra-high Molecular Polyethylene (UHMWPE for short) refers to linear polyethylene with a viscosity average molecular weight greater than 1.5 million. Its chain structure is a typical linear structure with very few branched chains, which is far lower than that of ordinary polyethylene. The branch point is less than 1 / 1000, and the macromolecular chain is super long, reaching tens of thousands of nanometers. Therefore, it is the best choice for ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F6/46D01F1/10D01D5/088D01D5/098D01D5/16D01D1/02D01D13/00
CPCD01D5/08D01F6/04D01F1/02
Inventor 王庆昭
Owner 王庆昭
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