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Low floating fiber polyformaldehyde composition and preparation method thereof

A technology of polyoxymethylene composition and low-floating fiber, which is applied in the field of engineering plastics, can solve the problems of surface performance, wear resistance and other properties of composite materials, surface quality reduction, and material performance reduction that have not been mentioned, so as to improve the intolerance Wear defects, low production cost, effect of improving mechanical properties

Active Publication Date: 2022-07-15
TAISHAN FIBERGLASS INC
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Chinese patent CN111040373A discloses a glass fiber reinforced polyoxymethylene plastic material and its preparation method. The main purpose of this patent is to use a compatibilizer to improve the tensile properties and impact resistance of the glass fiber reinforced polyoxymethylene material, but it does not mention The surface properties, wear resistance and other properties of the composite material
However, the non-polar nature of UHMWPP makes it difficult to interact well with other polymer materials and easily lead to uneven mixing, agglomeration and phase separation, resulting in serious performance degradation and surface quality degradation of the material.

Method used

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  • Low floating fiber polyformaldehyde composition and preparation method thereof
  • Low floating fiber polyformaldehyde composition and preparation method thereof
  • Low floating fiber polyformaldehyde composition and preparation method thereof

Examples

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preparation example Construction

[0084] The preparation method of the polyoxymethylene composition of embodiment 1-11 and comparative example 1-4, comprises the following steps:

[0085] (1) adding raw materials except glass fiber to high-speed premixing in a high-speed mixer to obtain a premix;

[0086] (2) The premix is ​​added from the feeding port of the twin-screw extruder, and the glass fiber and the premix are added to the middle of the twin-screw extruder, and are melt-blended, extruded, cooled, and pelletized by the twin-screw extruder. The polyoxymethylene composition is obtained; wherein, the temperature of each barrel of the twin-screw extruder from the feeding port to the die head is: 175°C, 185°C, 190°C, 190°C, 190°C, 190°C, 190°C, 200°C, respectively. , 200℃, 205℃, the screw speed is 400 rpm, the feeding amount is 30kg / h, and the vacuum degree is -0.1MPa;

[0087] (3) adding the polyoxymethylene composition prepared in the step (2) into the hopper of the injection molding machine, and using th...

Embodiment 4

[0098] The surface schematic diagram of the polyoxymethylene composition injection molding sample obtained in Example 4 is shown in figure 1 , the surface schematic diagram of the polyoxymethylene composition injection molding sample obtained in Example 8 is shown in figure 2 , the surface schematic diagram of the polyoxymethylene composition injection molding sample obtained in Comparative Example 2 is shown in image 3 . Depend on Figure 1-3 Floating fibers can be judged on the surface of the injection molding sample in The modification of the acid anhydride grafted ultra-high molecular weight polypropylene and the plasticizer DOP makes the glass fibers disperse more uniformly in the POM system, and the POM matrix wraps the glass fibers more tightly and perfectly. The surface of the sample is smooth without floating fibers, and the maleic anhydride grafted ultra-high molecular weight polypropylene further improves the POM / glass fiber composite material under the premise...

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Abstract

The invention belongs to the technical field of engineering plastics, and particularly relates to a low-floating-fiber polyformaldehyde composition and a preparation method thereof. The low floating fiber polyformaldehyde composition is prepared from the following raw materials in percentage by weight: 39.8 to 83.7 weight percent of polyformaldehyde, 1 to 15 weight percent of maleic anhydride grafted ultrahigh molecular weight polypropylene, 15 to 40 weight percent of glass fiber, 0.1 to 1 weight percent of antioxidant, 0.1 to 1.2 weight percent of compatilizer and 0.1 to 3 weight percent of plasticizer. The low-floating-fiber polyformaldehyde composition is good in surface, low in floating fiber, excellent in mechanical property and good in wear resistance, the adopted process is simple and effective, the production cost is low, and the low-floating-fiber polyformaldehyde composition has industrial advantages and practical value.

Description

technical field [0001] The invention belongs to the technical field of engineering plastics, and in particular relates to a low-floating fiber polyoxymethylene composition and a preparation method thereof. Background technique [0002] In order to improve the mechanical properties of polyoxymethylene resin, inorganic reinforcing materials such as glass fiber are often used to improve it in the prior art, and then a compatibilizer is used to improve the compatibility of polyoxymethylene resin and glass fiber, and improve the performance of the material. However, it is still difficult to obtain good dispersion and wrapping of glass fibers. When the POM / glass fiber composite material is formed, bare glass fibers are prone to appear on the surface, which is called the floating fiber phenomenon. Floating fiber accelerates the damage development and quality loss of POM products in friction behavior, reduces the wear resistance of the material, and shortens the life of the product....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L59/04C08L59/02C08L51/06C08K7/14
CPCC08L59/04C08L59/02C08L51/06C08K7/14
Inventor 付培根有祥康徐永军王炎涛刘雪静王培毅
Owner TAISHAN FIBERGLASS INC
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