Ultra-high-molecular-weight polyethylene fibers and preparation method thereof

A technology of ultra-high molecular weight and polyethylene fiber, which is applied in the field of man-made fibers, and can solve problems such as reduced efficiency, high hardness of inorganic high-hardness materials, and equipment wear and tear.

Active Publication Date: 2020-06-05
XINGYU SAFETY PROTECTION TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although this method can improve the anti-cut performance of ultra-high molecular weight polyethylene fibers to a certain extent, there are still some problems. First, these inorganic high-hardness materials have relatively high hardness, which causes serious wear and tear on equipment, and requires frequent replacement of equipment. Consumable components, which not only increase the cost but also reduce the efficiency; second, the reinforcement material has low flexibility and is easy to puncture the ultra-high molecular weight polyethylene fiber matrix during repeated use, the fiber is damaged and the high-strength anti-cutting performance fails; third, The anti-cut performance needs to be further improved; Fourth, although it is proposed to use carbon fiber with good flexibility as a reinforcing material, the natural color of carbon fiber is black, which makes the prepared high molecular polyethylene fiber poor in dyeability

Method used

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  • Ultra-high-molecular-weight polyethylene fibers and preparation method thereof

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Effect test

Embodiment 1

[0059] The present embodiment provides a kind of preparation method of ultra-high molecular weight polyethylene fiber, and it comprises the steps:

[0060](1) Get the 1200g boron nitride micron short fiber that length is 10-20um, be dispersed in 5Kg white oil, add surfactant linear alkylbenzene sulfonate sodium (LAS) 300g, high-speed stirring is evenly emulsified, obtains emulsified material.

[0061] (2) Put the above-mentioned emulsified material and 15kg of ultra-high molecular weight polyethylene powder with a molecular weight of 2 million and an average particle size of 100um into 95Kg white oil, stir and mix at high speed for 0.5h, heat to 70°C for 2h, stir and mix 0.5h, repeat until completely swelled to obtain a mixture.

[0062] (3) blending and extruding the mixture through a twin-screw extruder, cooling and molding in a coagulation bath to obtain a primary fiber, and the resulting primary fiber is extracted, dried, and multi-stage hot drawn to make a white super H...

Embodiment 2

[0065] The present embodiment provides a kind of preparation method of ultra-high molecular weight polyethylene fiber, and it comprises the steps:

[0066] (1) getting length is 20-40um 1200g surface has some microporous boron nitride micron short fibers, dispersed in 5Kg white oil, add surfactant linear alkylbenzene sulfonate sodium (LAS) 300g, Stir at high speed to emulsify evenly to obtain emulsified material.

[0067] (2) Put the above-mentioned emulsified material and 15kg of ultra-high molecular weight polyethylene powder with a molecular weight of 2 million and an average particle size of 100um into 95Kg white oil, stir and mix at high speed for 0.5h, heat to 70°C for 2h, stir and mix 0.5h, repeat until completely swelled to obtain a mixture.

[0068] (3) blending and extruding the mixture through a twin-screw extruder, cooling and molding in a coagulation bath to obtain a primary fiber, and the resulting primary fiber is extracted, dried, and multi-stage hot drawn to ...

Embodiment 3

[0071] The present embodiment provides a kind of preparation method of ultra-high molecular weight polyethylene fiber, and it comprises the steps:

[0072] (1) Take 1000g of boron nitride micron-sized short fibers with a length of 20-30um, dissolve them in 1L of 5mol / L sodium hydroxide solution, stir at 120°C for 12h, and rinse with deionized water for 3 times after suction filtration , and dried at 60°C to obtain surface hydroxylated boron nitride micron short fibers.

[0073] (2) Make acetone and dilute hydrochloric acid with a pH of 3 into a solution at a volume ratio of 9:1, add 50 g of coupling agent KH570, hydrolyze at 60°C for 1 hour, and then use the surface hydroxylated product obtained in the above (1) Boron nitride micron-sized short fibers are added to the solution, mixed with the hydrolyzed coupling agent, stirred at 50°C for 3 hours, filtered with suction, rinsed with deionized water for 3 times, and dried to obtain nitrogen modified by the surface coupling agent...

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Abstract

The present invention relates to ultra-high-molecular-weight polyethylene fibers and a preparation method thereof. The ultra-high-molecular-weight polyethylene fibers contain ultra-high-molecular-weight polyethylene matrixes and boron nitride micron-sized short fibers dispersed in the matrixes, and the content of the boron nitride micron-sized short fibers is 0.25-20wt%. Compared with existing polyethylene fibers filled with other inorganic high hardness reinforcing materials, the ultra-high-molecular-weight polyethylene fibers have the high cutting resistance and easy dyeing property, and because boron nitride has the lubricating property similar to that of graphene, fiber-forming equipment is not damaged. The invention also relates to the preparation method of the ultra-high-molecular-weight polyethylene fibers and anti-cutting gloves or anti-cutting clothing knitted from the ultra-high-molecular-weight polyethylene fibers. It is proved by testing that the gloves knitted from the ultra-high-molecular-weight polyethylene fibers are soft in hand feeling, free of pricking feel and comfortable to wear, and through EN388-2003 testing, the anti-cutting level is 4-5.

Description

technical field [0001] The invention relates to the technical field of man-made fibers, in particular to an ultra-high molecular weight polyethylene fiber and a preparation method thereof. Background technique [0002] Ultra-high molecular weight polyethylene fiber is currently the fiber with the highest specific strength among industrialized fiber materials. It has excellent properties such as high strength, high modulus, wear resistance, and chemical corrosion resistance. It is widely used in national defense, military, marine cables, personal protection, etc. field. With the continuous deepening of military-civilian integration, the application of ultra-high molecular weight polyethylene fibers in the civilian market has gradually increased, and the civilian market dominated by cut-resistant gloves has gradually occupied a dominant position. At present, the commonly used protective gloves made of 400D ultra-high molecular weight polyethylene fiber have the highest cuttin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F6/46D01F1/10
CPCD01F6/46D01F1/10
Inventor 周海涛周红波赵勇
Owner XINGYU SAFETY PROTECTION TECH CO LTD
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