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Abrasion-resisting reinforced polyformaldehyde alloy material and preparation method thereof

An alloy material, polyoxymethylene technology, applied in the field of wear-resistant, reinforced polyoxymethylene alloy material and its preparation process, can solve the problems of difficult uniform dispersion, poor thermal stability, narrow processing range, etc., and achieve no formaldehyde odor and thermal stability. Good, stable performance

Inactive Publication Date: 2012-07-18
上海蓝星聚甲醛有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

From this patent, we can see: 1. The polyoxymethylene used is homopolyoxymethylene, which has poor thermal stability, narrow processing range, and easy to produce formaldehyde odor; 2. The glass fiber used is long glass fiber, which is easy to produce floating fibers. And the dispersion effect is not good; 3. Adding both elastomeric polyurethane and glass fiber to polyoxymethylene, it is difficult for the three substances to disperse evenly in the mixed system, which affects the overall performance

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] (1) Mixing: Add raw materials in different proportions (parts by weight) into a high-speed mixer and mix: 100 parts of polyoxymethylene copolymer, 2 parts of surface modifier γ-chloropropyltrimethoxysilane, polytetrafluoroethylene with an average particle size of 14 μm 3 parts of vinyl fluoride, 0.2 parts of antioxidant, 0.2 parts of formaldehyde absorbent, 0.5 parts of lubricant polyethylene wax. The antioxidant used was triethylene glycol bis[β-(3-tert-butyl-4-hydroxy-5-methylphenyl)propionate] (Antioxidant 245).

[0024] The speed of the high-speed mixer is 300 rpm, and the mixing time is 3 minutes.

[0025] (2) Twin-screw extrusion granulation: Add the above-mentioned mixed materials into the hopper of the twin-screw extruder, and add glass fibers with a diameter of 8-15 μm and a length of 3-6 mm into the extruder through side feeding, Compared with POM, it is 10 parts. The temperature of the twin-screw extruder is 170° C., the screw speed is 50 rpm, and the extru...

Embodiment 2

[0027] (1) Mixing: Add raw materials in different proportions (parts by weight) into a high-speed mixer and mix, copolymerize 100 parts of polyoxymethylene, 3 parts of surface modifier monoalkoxy titanate, and polytetrafluoroethylene with an average particle size of 20 μm 5 parts, 0.3 part of antioxidant, 0.2 part of formaldehyde absorbent, 0.1 part of lubricant calcium stearate. The antioxidant used was pentaerythritol tetrakis(β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate (Antioxidant 1010).

[0028] The speed of the high-speed mixer is 500 rpm, and the mixing time is 8 minutes.

[0029] (2) Twin-screw extrusion granulation: Add the above-mentioned mixed materials into the hopper of the twin-screw extruder, and feed glass fibers with a diameter of 8-15 μm and a length of 3-6 mm into the extruder through side feeding , 20 parts compared with POM. The temperature of the twin-screw extruder is 180° C., the screw speed is 100 rpm, and the extruder is granulated.

Embodiment 3

[0031] (1) Mixing: Add raw materials in different proportions (parts by weight) into a high-speed mixer and mix, copolymerize 100 parts of polyoxymethylene, 5 parts of surface modifier monoalkoxy titanate, and polytetrafluoroethylene with an average particle size of 30 μm 10 parts, 0.8 parts of antioxidant, 0.2 parts of formaldehyde absorbent, 0.1 part of lubricant silicone oil. The antioxidant used is Chinox 30N.

[0032] The speed of the high-speed mixer is 800 rpm, and the mixing time is 5 minutes.

[0033] (2) Twin-screw extrusion granulation: Add the above-mentioned mixed materials into the hopper of the twin-screw extruder, and add glass fibers with a diameter of 8-15 μm and a length of 3-6 mm into the extruder through side feeding, Compared with POM, it is 20 parts. The temperature of the twin-screw extruder is 190° C., the screw speed is 150 rpm, and the extruder is granulated.

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Abstract

The invention relates to an abrasion-resisting reinforced polyformaldehyde alloy material and a preparation method thereof. According to the material, both the abrasive resistance and other rigidity indexes such as strength of extension and flexural strength of polyformaldehyde are improved, and furthermore, the thermal defomation temperature of the polyformaldehyde is improved greatly. A formulaof the material comprises the following compositions: 100 parts of polyformaldehyde, 5-35 parts of chopped glass fiber, 0-5 parts of surface treating agent, 3-20 parts of polytetrafluoroethylene, 0-1part of antioxygen, 0-1 part of methanal absorbent and 0-1 part of lubricating agent. The preparation method comprises the following steps of mixing by a high-speed mixer and extruding and granulating by twin screws. The alloy material has an excellent mechanical property and an abrasion resistance, and furthermore has a higher thermal deformation temperature, so that the material can be used in a high temperature environment; and the material can be used for producing bars, plates, gears, bearings and the like which have demands on high abrasion resistance, high strength and high heat resistance.

Description

technical field [0001] The invention relates to a high-performance plastic alloy material, in particular to a wear-resistant and reinforced polyoxymethylene alloy material and a preparation process thereof. Background technique [0002] Polyoxymethylene has good comprehensive properties and is known as "Saigang". Compared with other polymer materials, it has the advantages of high mechanical strength, fatigue resistance, chemical resistance and wear-resistant self-lubricating properties. It has an irreplaceable position in engineering plastics. With the wide application of polyoxymethylene in aerospace, aviation, automobile, electronics, machinery, construction and other industries, higher requirements are put forward for its properties such as wear resistance, rigidity, heat resistance, and dimensional stability. Recently, various polyoxymethylene alloy materials at home and abroad have blossomed everywhere, expanding the application range of polyoxymethylene. [0003] Mo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L59/04C08L27/18C08K7/14C08K5/3492B29C47/92B29B9/06B29C48/92
CPCB29C48/04B29C48/40B29C48/92B29C2948/9259B29C2948/92704B29C2948/92885B29C2948/92895
Inventor 陈红军王建平王丽英孙治琴
Owner 上海蓝星聚甲醛有限公司
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