Thermal-resistant anti-cutting ultra-high molecular weight polyethylene fiber and preparation method thereof

Abstract

The invention discloses a thermal-resistant anti-cutting ultra-high molecular weight polyethylene fiber which comprises ultra-high molecular weight polyethylene powder, inorganic nanoparticles, a cross-linking agent, a curing agent, an initiator and an antioxidant. The preparation method of the thermal-resistant anti-cutting ultra-high molecular weight polyethylene fiber comprises the following steps: swelling the ultra-high molecular weight polyethylene powder by using a solvent to form pores, adding a composite modifier formed by common infiltration of the cross-linking agent, the curing agent, the initiator, the antioxidant, the inorganic nanoparticles and the solvent are moistened by one another, enabling the components to uniformly permeate into the pores of the ultra-high molecular weight polyethylene powder, uniformly mixing, extruding and spinning through a screw extruder, removing the solvent, drawing so as to obtain the ultra-high molecular weight polyethylene fiber, and finally performing irradiation crosslinking, thereby obtaining the thermal-resistant anti-cutting ultra-high molecular weight polyethylene fiber. The thermal-resistant anti-cutting ultra-high molecular weight polyethylene fiber is wide in application and long in service life.

Description

technical field [0001] The invention belongs to the technical field of fiber production, and in particular relates to a heat-resistant and cut-resistant ultra-high molecular weight polyethylene fiber and a preparation method thereof. Background technique [0002] UHMWPE fiber (ultra-high molecular weight polyethylene fiber) is the third generation of high-performance fiber after carbon fiber and aramid fiber. It has many excellent properties such as chemical resistance and weather resistance, high energy absorption, low temperature resistance and electrical insulation. , is widely used in military, aerospace and navigation engineering, high-performance, lightweight composite materials and sports equipment, etc., to produce such as ropes, nets, medical equipment, fabrics, laminates, composite products and bulletproof products. [0003] The existing patents considering the improvement of the cutting resistance of raw material fibers include CN102828312A, JP2004-19050, W020...

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Problems solved by technology

[0003] The existing patents considering the improvement of the cutting resistance of raw material fibers include CN102828312A, JP2004-19050, W02008 / 046476, CN102037169A, CN102227524A, etc., among which high molecular weight polyethylene, polyamide with high symmetrical structure, polybenzone, etc. are mostly used. High-strength fiber and inorganic metal or glass fiber form composite fiber with core / skin, or wrap with high-elastic fiber and coat with hard mineral powder to achieve the goal of improving cutting resistance. However, due to the addition of inorganic metal and glass fiber The body feels hard and makes people feel uncomfortable; patent CN 102037169A (Toyobo) discloses a low molecular weight (50,000-300,000) polyethylene plus a cross-linking agent to form a network structure through free radicals to initiate cross-linking. To achieve the goal, but the method is melt spinning, and the formation of cross-linked chain gel at high temperature is not easy in terms of process operation (see documents 1, 2), and the follow-up still needs short fiber coating to achieve it, patent CN 18092292 A (DuPont) disclosed dihedral composite knitted fabric, in which the cut-resistant fiber components provided are mainly known high-strength aromatic polymers and branched polyethylene blend fibers, but this mixed spinning implementation is more cumbersome and complicated , and it is difficult to achieve uniformity during spinning; patents CN 101528998 A and 102277669 A (DSM) disclose a composite filament that includes filaments and so-called fixed-length fibers, wherein the fixed-length fibers mainly used are those with a certain aspect ratio. Chopped hard fiber, including: glass fiber, ore (stone) material fiber or metal fiber, the chemical property kind of hard fiber is not specified in this open patent, only tells the method spinning by known rotary technology or jet spinning etc. The diameter is less than 25 Nm, and the length-to-diameter ratio is greater than 10, and then it is ground into chopped hard fibers. Improvement, and then mixed with ultra-high molecular weight polyethylene (UHMWPE) solution for spinning, which has a significant effect on improving the cutting resistance of UHMWPE fibers, but the preparation process and production costs of fixed-length hard fibers in this method, especially the size distribution control It is difficult, especially when the length of some longer hard fibers exceeds the diameter of UHMWPE fibers, it is not good for the stability of the solution spinning process, and it will affect the strength (including modulus, breaking strength, etc.) and performance of the composite fiber products. In this regard, the patent CN 102227524 A (DSM) proposes to use the simpler ring spinning method to further form a sheath-core structure by coating it with polar polyaramide and other fiber filaments, wherein as before The cut-resistant wire is made of core. This improvement has a certain effect, but as mentioned above, this method is still limited to the improvement of the weaving structure, especially the glass fiber has a certain impact on human health.

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