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Polyoxymethylene modified material

A modified material, polyoxymethylene technology, applied in the polymer field, can solve the problems of poor heat resistance and easy decomposition, and achieve the effect of improving the processing process, reducing decomposition, and reducing the generation of irritating gases

Inactive Publication Date: 2008-02-27
MITAC PRECISION TECH CO LTD SHUNDE DISTRICT FOSHAN CITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the disadvantages of POM, such as poor heat resistance and easy decomposition during processing, greatly limit its application in various fields, especially in the field of high-end products. Therefore, it is very important to improve the performance of POM materials.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Weigh the following materials by weight:

[0040] Polyoxymethylene 100;

[0041] Melamine 0.4;

[0042] Antioxidant 245 0.5;

[0043] Magnesium hydroxide 0.5;

[0044] UV absorber 0.2;

[0045] EVA 1.2.

[0046] Then add the above materials into a high-speed mixer for mixing, use a vented twin-screw extruder to melt and knead, extrude and granulate, wherein the screw speed is 30-100 rpm, the barrel temperature is 140-230 ° C, and then Test the performance of gained finished product, its result and polyoxymethylene raw material performance contrast are as shown in table 1:

[0047] Table 1: Performance comparison between the finished product obtained in Example 1 and the polyoxymethylene raw material

[0048] project

Embodiment 2

[0050] Weigh the following materials by weight:

[0051] Polyoxymethylene 100;

[0052] Melamine 0.5;

[0053] Antioxidant 245 0.8;

[0054] Magnesium hydroxide 0.6;

[0055] UV absorber 0.3;

[0056] EVA 1.3.

[0057] Then add the above materials into a high-speed mixer for mixing, use a vented twin-screw extruder to melt and knead, extrude and granulate, wherein the screw speed is 30-100 rpm, the barrel temperature is 140-230 ° C, and then Test the performance of gained finished product, its result and polyoxymethylene raw material performance contrast are as shown in table 2:

[0058] Table 2: Performance comparison between the finished product obtained in Example 2 and the polyoxymethylene raw material

[0059] project

Embodiment 3

[0061] Weigh the following materials by weight:

[0062] Polyoxymethylene 100;

[0063] Melamine 0.6;

[0064] Antioxidant 245 0.9;

[0065] Magnesium hydroxide 0.7;

[0066] UV absorber 0.5;

[0067] EVA 1.5.

[0068] Then add the above materials into a high-speed mixer for mixing, use a vented twin-screw extruder to melt and knead, extrude and granulate, wherein the screw speed is 30-100 rpm, the barrel temperature is 140-230 ° C, and then Test the performance of gained finished product, its result and polyoxymethylene raw material performance contrast are as shown in table 3:

[0069] Table 3: Performance comparison between the finished product obtained in Example 3 and the polyoxymethylene raw material

[0070] project

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PUM

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Abstract

The invention discloses a modifying material of polyoxymethylene, which comprises the following parts: 100wt% polyoxymethylene, 0. 4-0. 6wt% polyoxymethylene stabilizer, 0. 5-1. 0wt% anti-oxidant, 0. 4-0. 8wt% hydroxide, 0. 2-0. 5wt% ultraviolet adsorbent and 1. 0-2. 0wt% toughening agent, wherein the formaldehyde adsorbent and polyoxymethylene stabilizer are added into the manufacturing course to modify the manufacturing course of polyoxymethylene to reduce the decomposition of polyoxymethylene in the manufacturing course to minimum extent. The invention reduces the generation of irritative gas and reduces the injury for human body, which doesn't changes a lot for polyoxymethylene mechanical property, fusion index and yellow index due to adding the stabilizer, therefore increasing the manufacturable times of the polyoxymethylene and reducing the manufacturing cost.

Description

technical field [0001] The invention relates to the technical field of polymers, in particular to a polymer material. Background technique [0002] POM (Polyoxymethylene, abbreviated as POM) is a main bond containing oxymethylene (-CH 2 The linear polymer compound of the O-) bond is a thermoplastic engineering material with high melting point, high density and high crystallinity without side chains. It has excellent mechanical properties, outstanding self-lubricating properties, wear resistance and Chemical resistance, high rigidity, good creep resistance and fatigue resistance, and can maintain its mechanical, chemical and electrical properties in a wide temperature range. It is one of the varieties closest to metal in engineering plastics. It can be used To replace aluminum, zinc and other non-ferrous metals and alloy products. In addition, polyoxymethylene can be processed by injection, blow molding, extrusion molding, and rotational casting molding, and is widely used ...

Claims

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Application Information

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IPC IPC(8): C08L59/02C08K5/3492C08L23/08C08K3/22C08K5/21
Inventor 岳瑟刘济林
Owner MITAC PRECISION TECH CO LTD SHUNDE DISTRICT FOSHAN CITY