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Preparation method of high-strength and high-toughness polyformaldehyde product

A high-strength, high-toughness, and polyoxymethylene technology, which is used in the preparation of high-strength and high-toughness polyoxymethylene products, and in the field of high-molecular polymers, can solve the problems of difficulty in obtaining mechanical strength and toughness polyoxymethylene materials.

Pending Publication Date: 2022-05-13
山东鲁化森萱新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It can be seen that it is difficult to obtain polyoxymethylene materials with high mechanical strength and toughness in current research.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Add 100 parts of polyoxymethylene, 0.3 parts of Irganox1010, and 10 parts of nylon 1010 powder materials into a high-speed mixer and mix evenly, then melt and knead with a twin-screw extruder, extrude and granulate, the screw speed is 100 rpm, and the barrel The temperature is 165-220°C to obtain the polyoxymethylene / nylon blended alloy; further press it to make a sheet-like sample with a width of 5mm and a thickness of 4mm. The pressing temperature is 210°C, the pressure is 10MPa, and the pressing time is 15min;

[0024] Fix the above-mentioned polyoxymethylene / nylon blended gold flake sample on the fixture of a self-made temperature-controllable and speed-adjustable thermal stretching device, and perform thermal stretching at 120°C at a stretching rate of 50mm / min. After the magnification reaches 8 times, stop stretching, cool, unload, and remove the sample to obtain a polyoxymethylene / nylon strip material with a highly oriented structure;

[0025] Arrange and weave ...

Embodiment 2

[0027] Add 100 parts of polyoxymethylene, 0.5 parts of Irganox 1098, and 20 parts of nylon 11 powder materials into a high-speed mixer and mix evenly, then melt and knead with a twin-screw extruder, extrude and granulate, and the screw speed is 150 rpm. Cylinder temperature is 165-200°C to obtain polyoxymethylene / nylon blended alloy; further press it to make a sheet-like sample with a width of 10mm and a thickness of 5mm. The pressing temperature is 200°C, the pressure is 15MPa, and the pressing time is 5min;

[0028] Fix the above-mentioned POM / Nylon blended gold flake sample on the fixture of a self-made temperature-controllable and speed-adjustable thermal stretching device, and perform thermal stretching at 150°C at a stretching rate of 100mm / min. After the magnification reaches 10 times, stop stretching, cool, unload, and remove the sample to obtain a polyoxymethylene / nylon strip material with a highly oriented structure;

[0029] Arrange and weave the obtained polyoxyme...

Embodiment 3

[0031] Put 100 parts of polyoxymethylene, 1 part of Irganox 245, and 30 parts of nylon 6 / 12 copolymer powder into a high-speed mixer and mix evenly, then melt and knead with a twin-screw extruder, extrude and granulate, and the screw speed is 120 rpm / min, the barrel temperature is 190-230°C, and the polyoxymethylene / nylon blended alloy is obtained; it is further pressed and formed into a sheet-like sample with a width of 20mm and a thickness of 6mm. The pressing temperature is 230°C and the pressure is 20MPa, pressing time is 20min;

[0032]Fix the above-mentioned POM / Nylon blended gold flake sample on the fixture of a self-made thermal stretching device with controllable temperature and speed adjustment, and perform thermal stretching at 130°C at a stretching rate of 10mm / min. After the magnification reaches 6 times, stop stretching, cool, unload, and remove the sample to obtain a polyoxymethylene / nylon strip material with a highly oriented structure;

[0033] Arrange and w...

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Abstract

The invention belongs to the field of high polymer material processing, and discloses a preparation method of a high-strength and high-toughness polyformaldehyde product, which is characterized by comprising the following steps: selecting a nylon variety of which the melting point is slightly higher than that of polyformaldehyde, preparing a polyformaldehyde / nylon blending alloy through melt extrusion processing, and pressing to form a flaky sample; then preparing a polyformaldehyde / nylon strip material with highly oriented polymer molecules by adopting a simple, convenient and efficient solid-phase hot stretching technology, arranging and weaving the polyformaldehyde / nylon strip material, putting the polyformaldehyde / nylon strip material into specially-made molds with various shapes, and forming a three-dimensional high-strength and high-toughness polyformaldehyde product with an oriented crystal structure at proper temperature and pressure. The polyformaldehyde is endowed with extremely high mechanical strength and toughness and has certain thermal conductivity, so that the application field of the polyformaldehyde is widened.

Description

technical field [0001] The invention belongs to the field of high-molecular material processing, and relates to a high-molecular polymer, in particular to a preparation method of high-strength and high-toughness polyoxymethylene products. Background technique [0002] Polyoxymethylene (POM) is a thermoplastic engineering plastic with [-CH2-O-] as the main chain, unbranched, high melting point, high density, and high crystallization. It has outstanding mechanical properties, creep resistance, fatigue resistance, and Grinding self-lubrication and chemical resistance, etc., are the varieties closest to metal in engineering plastics, and can be used to replace non-ferrous metals and alloy products such as copper, aluminum, zinc, etc., and are widely used in electronics, automobiles, light industry, machinery, chemical industry , building materials and other fields. [0003] However, due to its high crystallinity and high notch sensitivity, POM is prone to residual internal stre...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C69/02C08L59/02C08L77/06C08L77/02C08L77/00B29K59/00
CPCB29C69/02C08L59/02B29K2059/00C08L77/06C08L77/02C08L77/00
Inventor 娄兰亭叶林张艳梅赵晓文石家新张祥
Owner 山东鲁化森萱新材料有限公司
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