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Method of preparing ultrahigh-molecular-weight polyethylene fiber through high-concentration gel spinning

A technology of ultra-high molecular weight and polyethylene fiber, which is applied in the direction of spinning solution preparation, flash spinning, stretch spinning, etc., can solve the problems of difficult to guarantee the pre-swelling effect, limited ultrasonic mechanical effect, difficult to continue, etc. Achieve the effect of improving swelling and dissolving effect, avoiding difficulty in cutting materials, and excellent performance

Pending Publication Date: 2019-08-23
SHANGHAI RES INST OF CHEM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The ultrasonic mechanical effect is limited, the pre-swelling effect is difficult to guarantee, and this method also has the problem of complicated steps and difficult to be continuous

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Add a certain amount of white oil into the swelling kettle, heat up to 50°C, and add resin powder with a viscosity-average molecular weight of 1 million (bulk density 0.26g / cm2) in a proportion of 18% solid content. 3 ) and antioxidant 1010 and stirred at a constant speed (60r / min) for 40 minutes, then emulsified with a high-shear emulsifying homogenizer head at a speed of 10,000r / min for 30 minutes, then raised the temperature in the kettle to 80°C and kept stirring at a constant speed 60 minutes, then emulsified with a high-shear emulsifying homogenizer at a speed of 8000r / min for 30 minutes, then raised the temperature in the kettle to 100°C and kept stirring at a constant speed for 80 minutes, and then used a high-shear emulsifying homogenizer to Emulsify at a speed of 6000r / min for 20 minutes, and finally raise the temperature in the kettle to 105°C and keep stirring at a constant speed for 100 minutes, and emulsify with a high-shear emulsifying homogenizer head at ...

Embodiment 2

[0037] Add a certain amount of vegetable oil into the swelling kettle, heat up to 70°C, and add resin powder with a viscosity-average molecular weight of 3 million (bulk density 0.30g / cm2) at a solid content of 12%. 3 ) and antioxidant 168 and stirred at a constant speed (60r / min) for 60 minutes, then emulsified with a high-shear emulsifying homogenizer head at a speed of 12000r / min for 40 minutes, then raised the temperature in the kettle to 80°C and kept stirring at a constant speed 80 minutes, then use a high-shear emulsifying homogenizer to emulsify for 30 minutes at a speed of 8000r / min, then raise the temperature in the kettle to 90°C and keep stirring at a constant speed for 100 minutes, use a high-shear emulsifying homogenizer to Emulsify at a speed of 6000r / min for 20 minutes, then raise the temperature in the kettle to 95°C and keep stirring at a constant speed for 120 minutes, and emulsify at a speed of 4000r / min for 10 minutes with a high-shear emulsifying homogeniz...

Embodiment 3

[0039] Add a certain amount of kerosene into the swelling kettle, heat up to 50°C, and add resin powder with a viscosity-average molecular weight of 800,000 (bulk density 0.46g / cm2) at a solid content of 20%. 3 ) and antioxidant 1010 and stirred at a constant speed (60r / min) for 40 minutes, then emulsified with a high-shear emulsifying homogenizer head at a speed of 10,000r / min for 10 minutes, and then raised the temperature in the kettle to 80°C and kept stirring at a constant speed 60 minutes, then emulsified with a high-shear emulsifying and homogenizing head at a speed of 8000r / min for 10 minutes, then raised the temperature in the kettle to 100°C and kept stirring at a constant speed for 80 minutes, and then used a high-shear emulsifying and homogenizing head to Emulsify at a speed of 6000r / min for 5 minutes. Finally, raise the temperature in the kettle to 105°C and keep stirring at a constant speed for 100 minutes. Use a high-shear emulsifying homogenizer head to emulsify...

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Abstract

The invention relates to a method of preparing ultrahigh-molecular-weight polyethylene fiber through high-concentration gel spinning. The method includes: stepwise rising temperature of a suspension of ultrahigh-molecular-weight polyethylene resin and a spinning solvent, allowing spinning dope obtained by treatment to go through a double-screw extruder and a spinning box to obtain gel fiber, and subjecting the gel fiber to solvent removing, drying and ultra-drawing to obtain the ultrahigh-molecular-weight polyethylene fiber. Compared with the prior art, the method has the advantages that by controlling temperature and emulsifying time, the problem of discharging difficulty due to excessive swelling can be solved while swelling dissolving effect is realized, and the method is suitable for industrial product and can obtain the UHMWPE fiber with excellent performance.

Description

technical field [0001] The invention relates to a method for preparing ultra-high molecular weight polyethylene fibers, in particular to a method for preparing ultra-high molecular weight polyethylene fibers by high-concentration jelly spinning. Background technique [0002] Ultra-high molecular weight polyethylene (UHMWPE) fiber is one of the three major high-performance fibers in the world. Thanks to the high molecular weight and high crystallinity of UHMWPE, UHMWPE fiber has excellent mechanical properties, and at the same time it is light, cut-resistant and wear-resistant. , High thermal conductivity and other characteristics, so that it is used in military equipment, marine cables, civilian protective gloves and mats and other fields. The preparation of UHMWPE fibers is mainly through the gel spinning method, using solvents to fully untangle the UHMWPE molecular chains and then stretching and oriented to obtain finished fibers. Since the molecular chains of ultra-high ...

Claims

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Application Information

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IPC IPC(8): D01D1/02D01D5/00D01D5/11D01D5/12D01D10/02D01F1/10D01F6/46
CPCD01D1/02D01D5/00D01D5/11D01D5/12D01D10/02D01F6/46D01F1/10
Inventor 李济祥孙勇飞王新威郑晗巩明方张玉梅王萍
Owner SHANGHAI RES INST OF CHEM IND
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