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Glass fiber reinforced polypropylene resin powder for selective laser sintering and preparation thereof

A polypropylene resin, laser sintering technology, applied in the direction of additive processing, can solve problems such as poor physical and mechanical properties, limitations, etc., to achieve the effect of small size error, fewer holes, and suitable bulk density

Inactive Publication Date: 2017-04-26
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, its poor physical and mechanical properties limit its application

Method used

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  • Glass fiber reinforced polypropylene resin powder for selective laser sintering and preparation thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] 100 parts by weight of a polypropylene resin (melt index (210° C., 2.16 kg) of 35 g / 10 min) and 1000 parts by weight of n-hexane were placed in an autoclave. Introduce high-purity nitrogen to 0.2MPa; then raise the temperature to 120°C, and keep the temperature at this temperature for 60 minutes; after the end of the constant temperature, cool down to 80°C with cooling water at a rate of 1.0°C / min, and keep the temperature at this temperature for 60 minutes; continue Decrease to 25°C at a rate of 1.0°C / min, and keep at this temperature for 60 minutes. After adding 10 weight fractions of ultra-short glass fibers with a diameter of 5 μm and a length of 150 μm, 0.25 weight fractions of antioxidant 1010 and 0.25 weight fractions of antioxidant 168, and 0.5 weight fractions of calcium stearate in the obtained solid-liquid mixture , after centrifugal separation and vacuum drying, the glass fiber reinforced polypropylene resin powder suitable for selective laser sintering is o...

Embodiment 2

[0039] 100 parts by weight of a polypropylene resin (melt index (210° C., 2.16 kg) of 55 g / 10 min) and 800 parts by weight of n-hexane were placed in an autoclave. Introduce high-purity nitrogen to 0.3MPa; then raise the temperature to 130°C, and keep the temperature at this temperature for 60 minutes; after the constant temperature is completed, cool down to 20°C with cooling water at a rate of 1.0°C / min, and keep at 20°C for 60 minutes. After adding 25 weight fractions of ultra-short glass fibers with a diameter of 10 μm and a length of 250 μm, 0.25 weight fractions of antioxidant 1010 and 0.25 weight fractions of antioxidant 168, and 1 weight fraction of zinc stearate in the obtained solid-liquid mixture , after centrifugal separation and vacuum drying, the glass fiber reinforced polypropylene resin powder suitable for selective laser sintering is obtained. The particle size of the glass fiber reinforced polypropylene resin powder is 40-130 μm, and the particle size distrib...

Embodiment 3

[0041] 100 parts by weight of a polypropylene resin (melt index (210° C., 2.16 kg) of 70 g / 10 min) and 1200 parts by weight of n-hexane were placed in an autoclave. Introduce high-purity nitrogen to 0.1MPa; then raise the temperature to 110°C, and keep the temperature at this temperature for 90 minutes; after the constant temperature is completed, cool it down to 25°C with cooling water at a rate of 0.1°C / min, and keep the temperature at this temperature for 90 minutes. After adding 10 weight fractions of ultra-short glass fibers with a diameter of 15 μm and a length of 200 μm, 0.1 weight fraction of antioxidant 1010 and 0.1 weight fraction of antioxidant 168, and 0.75 weight fraction of nano-silica in the obtained solid-liquid mixture , after centrifugal separation and vacuum drying, the glass fiber reinforced polypropylene resin powder suitable for selective laser sintering is obtained. The particle size of the glass fiber reinforced polypropylene resin powder is 30-147 μm, ...

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Abstract

The invention provides a preparation method of a glass fiber reinforced polypropylene resin powder for selective laser sintering. The method includes the steps of: a) at a heating temperature, dissolving polypropylene resin in an alkane organic solvent to obtain a polypropylene resin solution; b) cooling the polypropylene resin solution obtained by step a) to make solid precipitate out; c) adding assistants into the solid-liquid mixture obtained by step b), mixing the substances evenly, and performing drying so as to obtain the powder, wherein the assistants include ultra-short glass fiber, an antioxidant and a powder separant. The method has the characteristics of simple operation and easy operation, not only provides the sintering raw material with excellent processing properties for selective laser sintering, but also provides a new direction for processing and application of functional polypropylene resin. The invention further provides the glass fiber reinforced polypropylene resin powder prepared according to the method and a selective laser sintering method adopting the glass fiber reinforced polypropylene resin powder as the sintering powder raw material.

Description

technical field [0001] The invention relates to the technical field of polymer processing, in particular to a glass fiber reinforced polypropylene resin powder for selective laser sintering, a preparation method thereof and an application in selective laser sintering. Background technique [0002] Selective Laser Sintering (SLS) technology is a rapid prototyping technology, which is currently the most widely used and most promising technology in additive manufacturing technology, showing a rapid development trend in recent years. SLS technology is a technology in which the computer first scans the three-dimensional entity, and then selectively melts and sinters the material powder pre-laid on the workbench or parts through high-intensity laser irradiation, and then realizes layer-by-layer molding. . SLS technology has a high degree of design flexibility, can manufacture accurate models and prototypes, can form parts with reliable structures that can be used directly, and ha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J3/14C08L23/12C08K13/04C08K7/14C08K5/134C08K5/526C08K5/098C08K3/36C08K3/22C08K3/26B29C67/04B33Y70/00
Inventor 初立秋刘建叶邵静波董穆张丽英吕芸徐耀辉徐萌解娜侴白舸
Owner CHINA PETROLEUM & CHEM CORP
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