Spinning-grade polyoxymethylene material and preparation method thereof

Abstract

The invention discloses a spinning-grade polyoxymethylene material and a preparation method thereof. The spinning-grade polyoxymethylene material is prepared from the following raw materials by melt extrusion: 100 parts by weight of polyoxymethylene resin polymer, 0.01-3 parts of an anti-oxidant, 0.01-7 parts of a formaldehyde absorbent and 0.05-5 parts of a lubricant. By adding auxiliary agent capable of performing combined action with the base material into the base material and optimizing and adjusting the ratio parameters of the formula, the polyoxymethylene product has good dispersibility and fluidity, the spinnability of the material is substantially improved in spinning process, and the strength / elasticity modulus of the fiber are substantially improved, so that the industrialized production of the spinning-grade polyoxymethylene material is guaranteed. Also, under the condition of optimizing and adjusting different ratios of polymerization monomers of the polyoxymethylene resin, by employing conventional production technology, the polyoxymethylene material has appropriate melt index, the crystallization of the fiber-grade polyoxymethylene resin can be effectively controlled, high-strength fiber products can be produced, and the production technology is simple and easy to operate, and compared with prior art, the cost is relatively low and the production efficiency is relatively high.

Description

technical field [0001] The invention belongs to the technical field of polymer engineering plastics, and in particular relates to a fiber-grade polyoxymethylene and a preparation method thereof. The method obtains excellent spinnability and high strength by adjusting the ratio of monomers, lubricants and other auxiliary agents. , Fiber-grade polyoxymethylene with good tensile recovery performance. Background technique [0002] Polyoxymethylene is an engineering plastic with excellent comprehensive properties, which is widely used in industries such as automobiles, electronic appliances, household appliances, precision machinery and building materials. [0003] Due to the excellent comprehensive performance of polyoxymethylene, the polyoxymethylene fiber prepared from fiber-grade polyoxymethylene special material also inherits most of its advantages. The polyoxymethylene fiber has the characteristics of high rigidity and high strength, and the fiber has good dimensional stabi...

AI Technical Summary

Problems solved by technology

The former improves production efficiency by controlling the content of hemiacetal terminal groups, adjusting the amount of oxyalkylene units, and selecting a suitable range of melt index, and prepares high-strength, high-elastic modulus polyoxymethylene resin stretched bodies; the latter adjusts On the basis of the amount of oxyalkylene units, controlling the content of hemiacetal terminal groups and the semi-crystallization time, the drawing process of the fiber is further supplemented, such as drawing rate, heating temperature, etc., to prepare high-strength, high-elastic modulus polyester. Formaldehyde fiber; but in the later spinning process, the fluidity and dispersion are not good, which affects the performance of the final product, and it is easy to generate stress concentration points in the fiber, frequent fiber breakage, limited stretching of the primary fiber, and low production efficiency

And the production process is complicated and the cost is high, so that the practicability and popularization of the produced polyoxymethylene fiber are limited

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