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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 chemical structure inhomogeneity, fiber surface crosslinking, poor performance, etc. Achieve the effect of enhancing antioxidant performance, reducing oxidation phenomenon, and overcoming time-consuming effects

Active Publication Date: 2021-10-15
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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  • High-creep-resistance ultra-high molecular weight polyethylene fiber and preparation method thereof
  • High-creep-resistance ultra-high molecular weight polyethylene fiber and preparation method thereof
  • High-creep-resistance ultra-high molecular weight polyethylene fiber and preparation method thereof

Examples

Experimental program
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Effect test

preparation example Construction

[0034] see figure 1 Shown, the invention provides a kind of preparation method of high creep resistance ultra-high molecular weight polyethylene fiber, comprises the steps:

[0035] S1, preparation of mixed suspension: mix ultra-high molecular weight polyethylene powder, mixed solvent, antioxidant and sensitizer according to a predetermined ratio, and stir for 8-20 hours to achieve sufficient swelling and uniform dispersion to 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 filaments; the primary jelly filaments are passed through an extractant and an anti- The mixed extract composed of oxidant is extracted and then dried, and then the primary fiber product is obtained through multi-stage hot drawing and multi-stage oven;

[0037] S3, radiation cross-linking: the initial fiber product is s...

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, preparation of mixed suspension: mix ultra-high molecular weight polyethylene powder, mixed solvent, antioxidant and sensitizer at a ratio of 10; 87; 2; 1, and stir for 12 hours to achieve full swelling and uniform dispersion, and keep mixing The dynamics of the liquid are uniform and consistent, 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; and the antioxidant is tert-butyl hydroquinone.

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

Embodiment 2-5

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

[0064] Table 1 is the process 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 oxidation resistance of high-creep-resistant ultra-high molecular weight polyethylene fibers is: the proportion of antioxidants in the suspension affects the oxidation 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...

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Abstract

The invention provides high-creep-resistance ultra-high molecular weight polyethylene fiber and a preparation method thereof. The preparation method comprises the following steps of S1, mixing ultra-high molecular weight polyethylene powder, a mixed solvent, an antioxidant and a sensitizer according to a preset proportion, and performing stirring to obtain a uniform mixed suspension; S2, putting the mixed suspension into a double-screw extruder for spinning treatment, then obtaining primary gel filament through a cooling water bath, extracting the primary gel filament through a mixed extraction solution containing the antioxidant, performing drying, and then obtaining a primary fiber product through multi-stage hot drafting and multi-stage drying in a drying oven; and S3, performing irradiation crosslinking: performing irradiation treatment of a predetermined dose on the primary fiber product, and finally performing annealing treatment under a nitrogen condition to obtain the high-creep-resistance ultra-high molecular weight polyethylene fiber. Compared with conventional ultra-high molecular weight polyethylene fiber, the creep elongation of the high-creep-resistance ultra-high molecular weight polyethylene fiber prepared by the invention is reduced by 50% or above.

Description

technical field [0001] The invention relates to the technical field of preparation of high-molecular-weight polyethylene fibers, in particular to a high-creep-resistant ultra-high-molecular-weight polyethylene fiber and a preparation method thereof. Background technique [0002] Ultra-high molecular weight polyethylene (UHMWPE) fiber, as one of the world's three major high-performance fibers, 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 strong acids, strong alkalis and other chemicals, has high electromagnetic wave transmittance, and has a lower friction coefficient than many materials. It has the characteristics of non-absorbent and good biocompatibility. Therefore, UHMWPE fibers are widely used in military protective materials, aerospace related materials, medical materials, radome, marine anchor ropes and many other fields....

Claims

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Application Information

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Patent Type & Authority Applications(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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