Spinning-grade polyoxymethylene material and preparation method thereof

A polyoxymethylene material, spinning grade technology, applied in the field of polymer engineering plastics, can solve the problems of primary fiber stretch limit, performance impact, high cost, etc., to achieve good dispersion and fluidity, strength/elastic modulus improvement, The effect of easy operation of the production process

Inactive Publication Date: 2014-04-30
YUNNAN YUNTIANHUA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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

Method used

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  • Spinning-grade polyoxymethylene material and preparation method thereof
  • Spinning-grade polyoxymethylene material and preparation method thereof
  • Spinning-grade polyoxymethylene material and preparation method thereof

Examples

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preparation example Construction

[0028] The spinning-grade polyoxymethylene material and its preparation method of the present embodiment, the spinning-grade polyoxymethylene material is formed by melting and extruding the following raw materials, and the raw materials include the following components by weight: 100 parts of polyoxymethylene resin polymer, antioxidant 0.01-3 parts, 0.01-7 parts of formaldehyde absorbent, 0.05-5 parts of lubricant; by optimizing and adjusting the formula of additives for the base material, including lubricants, antioxidants, formaldehyde absorbents and other additive formulas The adjustment ensures the dispersibility and fluidity, avoids the problems of frequent stress concentration points and fiber breakage in the fiber, and ensures the spinnability of the material in the spinning process, so that the industrial production of the present invention can be guaranteed;

[0029] When the amount of antioxidant was less than 0.01 parts by weight, the thermal stability of the polyoxy...

Embodiment 9

[0092] Select the polyoxymethylene resin polymer raw material in the preparation embodiment 1 to obtain the polyoxymethylene fiber base material through melt extrusion and post-treatment according to the formula of embodiment 4;

[0093] The polyoxymethylene fiber base material was dried in a vacuum drying oven for 8 hours, melted in a single-screw extruder, and extruded by a melt metering pump, and the extruded melt was filtered and extruded through a 0.5mm die hole. Out; the extruded molten resin is wound up through the winding drum to obtain primary fibers.

[0094] The primary fiber is wound on the upper roll (120°C) for preheating, then passed through the hot clamp (140°C) and then wound on the lower roll (150°C), by controlling the wires that are wound into the roll and out of the roll The speed is used to control the stretching ratio, and the copolymerized polyoxymethylene resin fiber is obtained after the primary fiber is stretched.

[0095] The polyoxymethylene resin...

Embodiment 10

[0098] The process of embodiment ten to embodiment fifteen is exactly the same as embodiment nine, the only difference is that the copolyoxymethylene resin powder corresponding to embodiment ten is derived from preparation embodiment two, and embodiment eleven corresponds to preparation embodiment three and embodiment twelve Corresponding to Preparation Example 4, Example 13 corresponds to Preparation Example 5, Example 14 corresponds to Preparation Example 6, and Example 15 corresponds to Preparation Example 7.

[0099] The technological process of above-mentioned embodiment sees Table 5 and Table 6:

[0100] Table 5 embodiment pellet extrusion parameter

[0101]

[0102] Table 6 embodiment primary fiber extrusion parameters

[0103]

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L59/04D01F6/94
Inventor 黎泽东陈玉仙张海涛唐晓东余秋林旷佳施成宏普雪涛
Owner YUNNAN YUNTIANHUA
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