High cutting-resistant high-strength and high modulus polyethylene filament and preparation method thereof

Abstract

The invention discloses a high cutting-resistant high-strength and high modulus polyethylene filament and a preparation method thereof. A product is composed of an ultrahigh molecular weight polyethylene filament and a soft wear-resisting short fiber, wherein the mass content of the soft wear-resisting short fiber is 20 to 40% of that of an ultrahigh molecular weight polyethylene matrix. The preparation method comprises the steps of preparing the soft wear-resisting short fiber, preparing an ultrahigh molecular weight polyethylene spinning solution, preparing short fiber pre-dispersion liquid, adding the short fiber pre-dispersion liquid into the ultrahigh molecular weight polyethylene spinning solution, and further preparing to obtain an ultrahigh molecular weight polyethylene fiber. The cutting-resistant ultrahigh molecular weight polyethylene filament with optimized performance, which is prepared by the method provided by the invention, has the advantages that the strength is high, the modulus is high, the residual oil content is low, the cutting-resistant performance is stable and the hand feel is soft.

Description

technical field [0001] The invention relates to a high-strength polyethylene filament and a preparation method thereof, belonging to the technical field of high-performance fibers. Background technique [0002] High-strength polyethylene fiber is generally made of ultra-high molecular weight polyethylene with an intrinsic viscosity greater than 18 by gel spinning. The viscosity-average molecular weight of ultra-high molecular weight polyethylene in the fiber is generally above 2 million, which makes the fiber much higher than conventional chemical fibers. Excellent strength and modulus, the products made of it have excellent tensile resistance, impact resistance and wear resistance, and are widely used in ropes, bulletproof products, labor protection products, etc. Although the wear-resistant and cut-resistant performance of labor protection products such as gloves, sleeves, aprons, etc. directly woven by high-strength polyethylene fibers is better than that of conventional ...

AI Technical Summary

Problems solved by technology

[0004] Patent WO2008 / 046476 discloses a method for preparing cut-resistant ultra-high molecular weight polyethylene fibers. The method is to mix hard mineral fibers into the spinning stock solution with decahydronaphthalene as a solvent, and spin through dry spinning UHMWPE fiber is made, and the cutting resistance of the obtained UHMWPE fiber has a certain improvement compared with conventional high-strength polyethylene fiber, but due to the use of mineral fineness, there are also the following problems: (1) due to the use of The modified additive is a short fiber with a certain length-to-diameter ratio, which is easy to block the filter screen during the production process, causing the production to fail smoothly; (2) due to the use of short mineral fibers, its binding force with polyethylene is poor, and it is not easy to Evenly dispersed in ultra-high molecular weight polyethylene, resulting in unstable cutting resistance of the final fiber; (3) The hand feeling of the spun fiber is poor, resulting in poor hand feeling of the final product

[0005] Patent CN105734708A discloses a method for preparing cut-resistant ultra-high molecular weight polyethylene fibers, which is to mix hard fibers such as ceramic fibers, carbon fibers, and silicon carbide whiskers with a solution of ultra-high molecular weight polyethylene to spin For fiber, the hard fiber was stirred in a high mixer in advance, and then pre-dispersed in white oil, the dispersion effect of hard fiber in the stock solution was improved, but the hard fiber and fiber matrix were poorly bonded, and the fiber The disadvantage of poor hand feeling still exists

[0006] The patent US5976998 discloses a filling cut-resistant fiber, which is made of a fiber-forming polymer and a hard particle with a Mohs hardness greater than 3. Due to the small particle size and small amount of the hard particle used, there are the following Problems: (1) The particle size of the hard particles is small, and it is easy to agglomerate in the spinning dope, and it is easy to block the filter screen; (2) The amount of hard particles is small, and it cannot form a uniform network distribution in the fiber body, which is harmful to the fiber. Poor cutting resistance improvement effect

Images