A kind of high creep resistance ultra-high molecular weight polyethylene fiber and preparation method thereof

An ultra-high molecular weight, polyethylene fiber technology, applied in the direction of single-component polyolefin rayon, fiber treatment, fiber chemical characteristics, etc., can solve the problems of uneven chemical structure, fiber surface cross-linking, surface oxidation, etc. Enhance antioxidant properties, reduce oxidation, overcome time-consuming effects

Active Publication Date: 2022-08-02
WUHAN TEXTILE UNIV +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the ultra-high molecular weight polyethylene fiber product has technical defects such as fiber surface crosslinking, surface oxidation, inhomogeneous chemical structure, and poor performance.

Method used

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  • A kind of high creep resistance ultra-high molecular weight polyethylene fiber and preparation method thereof
  • A kind of high creep resistance ultra-high molecular weight polyethylene fiber and preparation method thereof
  • A kind of high creep resistance ultra-high molecular weight polyethylene fiber and preparation method thereof

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Experimental program
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preparation example Construction

[0034] see figure 1 As shown, the present invention provides a preparation method of high creep-resistant ultra-high molecular weight polyethylene fiber, comprising the following steps:

[0035] S1, prepare a mixed suspension: mix the ultra-high molecular weight polyethylene powder, mixed solvent, antioxidant and sensitizer in a predetermined proportion, and stir for 8-20 hours to achieve full swelling and uniform dispersion, and obtain a uniform mixed suspension;

[0036] S2, spinning extraction: the mixed suspension obtained in step S1 is placed in a twin-screw extruder for spinning treatment, and then passed through a cooling water bath to obtain primary jelly silk; The mixed extraction liquid composed of oxidant is extracted and then dried, and then, the initial fiber product is obtained through multi-stage thermal drawing and multi-stage drying oven;

[0037] S3, Irradiation crosslinking: the initial fiber product is irradiated with a predetermined dose, and finally anne...

Embodiment 1

[0048] Embodiment 1 of the present invention provides a method for preparing a high creep-resistant ultra-high molecular weight polyethylene fiber, comprising the following steps:

[0049] S1, prepare mixed suspension: mix ultra-high molecular weight polyethylene powder, mixed solvent, antioxidant and sensitizer in the ratio of 10; 87; 2; 1, and stir for 12h to achieve full swelling and uniform dispersion, keep mixing The liquid dynamics are uniform and uniform, and a uniform mixed suspension is obtained;

[0050] Wherein, the mixed solvent is a mixed solution of paraffin oil and white oil; the sensitizer is trimethylolpropane trimethacrylate; the antioxidant is tert-butyl hydroquinone.

[0051] S2, spinning extraction: pass the mixed suspension obtained in step S1 through a twin-screw extruder, a spinneret and a spinning box (pre-drafting 3-6 times), and after spinning treatment, pass through a cooling water bath to obtain primary jelly silk; the primary jelly silk is extrac...

Embodiment 2-5

[0063] The difference from Example 1 is that the ratio of antioxidants in the suspension in step S1 and the ratios of extractant and antioxidant in the extraction process in step S2 are set differently, as shown in Table 1.

[0064] Table 1 is the technological parameter setting of embodiment 1-5 and the performance parameter of monofilament fiber

[0065]

[0066] Combined with Table 1 for analysis:

[0067] The effect of the proportion of antioxidants in the suspension on the creep elongation or antioxidant properties of high-creep-resistant UHMWPE fibers is: the proportion of antioxidants in the suspension affects the oxidation of fibers during fiber spinning. degree. Within a certain range, the higher the proportion of antioxidants, the smaller the degree of oxidation. The degree of oxidation determines the chemical structure of the fiber. Severe oxidation will increase the creep elongation of the fiber.

[0068] In the mixed extract, the effect of the ratio of extrac...

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Abstract

The invention provides a high creep-resistant ultra-high molecular weight polyethylene fiber and a preparation method thereof. The preparation method is as follows: S1, mixing ultra-high molecular weight polyethylene powder, mixed solvent, antioxidant and sensitizer in a predetermined proportion, and stirring to obtain a uniform mixed suspension; S2, placing the mixed suspension in a twin-screw extruder After spinning out of the machine, the primary jelly filaments are obtained through a cooling water bath; the nascent jelly filaments are extracted with a mixed extract containing antioxidants and then dried, and then subjected to multi-stage thermal drawing and multi-stage heat drawing. graded oven to obtain the initial fiber product; S3, radiation crosslinking: the initial fiber product is subjected to a predetermined dose of irradiation treatment, and finally annealed under nitrogen conditions to obtain high creep-resistant ultra-high molecular weight polyethylene fibers. Compared with conventional ultra-high molecular weight polyethylene fibers, the fiber creep elongation of the high-creep-resistant ultra-high molecular weight polyethylene fibers prepared by the present invention is reduced by 50% or more.

Description

technical field [0001] The invention relates to the technical field of high molecular weight polyethylene fiber preparation, in particular to a high creep-resistant ultra-high molecular weight polyethylene fiber and a preparation method thereof. Background technique [0002] As one of the three major high-performance fibers in the world, ultra-high molecular weight polyethylene (UHMWPE) fiber has many excellent properties, because UHMWPE fiber has high specific strength, high specific modulus, excellent impact resistance and good wear resistance. It can also withstand the corrosion of chemicals such as strong acids and alkalis. The electromagnetic wave transmittance is also high, and the friction coefficient is lower than that of many materials. It has the characteristics of no water absorption and good biocompatibility. Therefore, UHMWPE fibers are widely used in military protective materials, aerospace-related materials, medical materials, radomes, marine anchor ropes and ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01F6/46D01F1/10D01F11/06D06M10/00
CPCD01F6/46D01F1/10D01F11/06D06M10/008D06M10/00
Inventor 王栋杨晨光文鑫王雯雯王小俊
Owner WUHAN TEXTILE UNIV
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