Low-odor and high-wear-resistance polyformaldehyde composite material and preparation method thereof

A technology of composite materials and polyoxymethylene, applied in the field of polymers, can solve problems such as poor thermal stability, poor aging resistance, easy decomposition, etc., and achieve the effects of improving dispersion, excellent mechanical properties, and improved wear resistance

Inactive Publication Date: 2020-01-07
HEFEI GENIUS NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, polyoxymethylene has poor thermal stability at high temperatures, is easy to decompose, has a narrow processing temperature, and has poor aging resistance, so it can only be used under low speed and low load conditions.

Method used

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  • Low-odor and high-wear-resistance polyformaldehyde composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0026] Preparation of odor adsorption masterbatch: 10 parts of polyoxymethylene, 90 parts of PET resin, 10 parts of hydrophobic diatomite, 10 parts of hydrophobic activated carbon, 10 parts of needle-shaped zeolite molecular sieve, 10 parts of zinc ricinoleate, 5 parts of nano-silica 1 part, 1 part of calcium stearate, 5 parts of melamine, 0.5 part of benzofuranone free radical scavenger, put into a high-speed mixer and mix evenly, then extrude and granulate in a twin-screw extruder to obtain an odor adsorption masterbatch.

[0027] The relative molecular weight of polytetrafluoroethylene is 1 million, and the crystallinity is 90%.

[0028] The relative molecular weight of polyphenylene sulfide is 80,000, and the moisture content is lower than 0.05%.

[0029] The average particle size of polytetrafluoroethylene and polyphenylene sulfide is 0.2-0.3 μm.

[0030] The anti-wear agent is a mixture of molybdenum disulfide and silicon nitride in a weight ratio of 1:19.

[0031] The...

Embodiment 1

[0033] Pour 70 parts of resin matrix, 3 parts of odor absorption masterbatch, 0.5 part of wear-resistant agent, 1 part of silicone powder, 0.5 part of antioxidant 1098, and 0.5 part of antioxidant 168 into a high-speed mixer, stir at high speed, and mix until uniform Then add it to the twin-screw extruder, add 25 parts of modified glass fiber from the glass fiber port, melt and extrude it, and then granulate it to prepare a mixture of polyoxymethylene and PET resin with low odor, low emission, and high wear resistance. Material.

[0034] Among them, the temperature of the first zone of the twin-screw extruder is 160°C, the temperature of the second zone is 165°C, the temperature of the third zone is 160°C, the temperature of the fourth zone is 170°C, the temperature of the fifth zone is 170°C, and the temperature of the sixth zone is 170°C; The host speed is 250rpm.

Embodiment 2

[0036] Pour 54 parts of resin matrix, 1 part of odor absorption masterbatch, 0.2 part of wear-resistant agent, 0.2 part of silicone powder, 0.1 part of antioxidant 1098, and 0.1 part of antioxidant 168 into a high-speed mixer, stir at high speed, and mix until uniform Then add it to the twin-screw extruder, add 45 parts of modified glass fiber from the glass fiber port, melt and extrude it, and then granulate it to prepare a mixture of polyoxymethylene and PET resin with low odor, low emission, and high wear resistance. Material.

[0037] Among them, the temperature of the first zone of the twin-screw extruder is 170°C, the temperature of the second zone is 170°C, the temperature of the third zone is 180°C, the temperature of the fourth zone is 180°C, the temperature of the fifth zone is 185°C, and the temperature of the sixth zone is 185°C; The host speed is 500rpm.

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Abstract

The invention discloses a low-odor and high-wear-resistance polyformaldehyde composite material, which is prepared from the following components in parts by weight: 54 to 90 parts of resin matrix, 5 to 45 parts of modified glass fiber, 1 to 5 parts of an odor adsorption master batch, 0.1 to 0.5 part of wear-resistant agent, 0.2 to 1.0 part of a lubricating agent and 0.1 to 1 part of an antioxidant; the resin matrix is a mixture composed of polyformaldehyde and PET in a weight ratio of 1: 9. According to the invention, a mixed dispersion glue solution composed of polytetrafluoroethylene and polyphenylene sulfide is used for carrying out dipping treatment on the glass fiber, and then roasting and sintering are carried out, so that the dispersity of the glass fibers in a polyformaldehyde andPET resin mixture matrix is greatly improved, the wear resistance of the prepared composite material is remarkably improved, and excellent mechanical properties are maintained. A small amount of wear-resistant agent is used for synergistically improving the wear resistance of the composite material; meanwhile, the odor adsorption master batch is used for reducing the content of formaldehyde in thecomposite material.

Description

technical field [0001] The invention relates to the technical field of polymers, in particular to a polyoxymethylene composite material with low odor and high wear resistance and a preparation method thereof. Background technique [0002] Polyoxymethylene is an engineering plastic with excellent comprehensive properties. It has extremely high strength and rigidity, good dimensional stability, and excellent fatigue resistance, creep resistance, self-lubrication and wear resistance. It is used in machinery, automobiles , electronics, home appliances and building materials are widely used in the manufacture of various parts with low friction and wear resistance. However, polyoxymethylene has poor thermal stability at high temperatures, is easy to decompose, has a narrow processing temperature, and has poor aging resistance, so it can only be used under low speed and low load conditions. In order to make polyoxymethylene used under harsh conditions such as high speed and high l...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/02C08L59/00C08K13/06C08K9/04C08K7/14C08K3/30C08K3/34C08K7/26C08K3/04C08J3/22
CPCC08J3/226C08J2367/02C08J2459/00C08J2467/02C08K3/04C08K3/34C08K7/14C08K7/26C08K9/08C08K13/06C08K2003/3009C08K2201/011
Inventor 杨桂生吴安琪范继贤姚晨光
Owner HEFEI GENIUS NEW MATERIALS
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