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A kind of preparation method of high-density polyethylene powder material

A technology of high-density polyethylene and powder materials, applied in the field of powder materials, can solve the problems of reduced resin fusion adhesion, affecting the mechanical strength of products, and low yield of powder materials, etc., to improve resin fusion adhesion , easy to implement, and enhance the effect of mechanical strength

Active Publication Date: 2022-06-14
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But this invention has the following problems: the yield of powder material is not high, and the overall particle size is too small, and the thickness of the resin layer coated on the surface of the spherical carrier is relatively thin, which will cause the reduction of resin fusion adhesion during processing, affecting Product mechanical strength

Method used

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  • A kind of preparation method of high-density polyethylene powder material
  • A kind of preparation method of high-density polyethylene powder material
  • A kind of preparation method of high-density polyethylene powder material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] First, a 250 mL three-necked flask with a heating system, a stirring device and a reflux condensing system was replaced with nitrogen for no less than three times, and then 100 mL of decalin and 0.3 g HDPE were added to raise the system temperature to 135 ° C, and at this temperature Keep it for 0.5 hours until HDPE is completely dissolved in decalin; add 3 g of silica gel, the particle size of silica gel is 35 μm, add 3 mL of alcohol ether compound solvent (the mass ratio of absolute ethanol and octylphenol polyoxyethylene ether is 1:1 ), the stirring speed is 500rpm; the system is cooled to 105°C by a program, the cooling rate is 3°C / 10 minutes, and the system is kept at a constant temperature of 105°C for 2 hours. Finally, stop stirring, let stand, suck out the supernatant, wash with hexane three times, and vacuum dry to obtain powder material. The specific formula and process conditions of the embodiment are shown in Table 1, and the properties of the powder materia...

Embodiment 2

[0043] The powder material was prepared by the same method as in Example 1, but in the preparation process, the amount of silica gel was changed from 3 g to 1 g. The specific formula and process conditions of the embodiment are shown in Table 1, and the properties of the powder material are shown in Table 2.

Embodiment 3

[0045] The powder material was prepared by the same method as in Example 1, but in the preparation process, the amount of the alcohol-ether compound solvent was changed from 3 mL to 1 mL. The specific formula and process conditions of the embodiment are shown in Table 1, and the properties of the powder material are shown in Table 2.

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Abstract

The invention belongs to the technical field of powder materials, and in particular relates to a preparation method of high-density polyethylene powder materials. The preparation method comprises the following steps: dispersing HDPE in a solvent; adding a spherical carrier and an alcohol ether compound solvent, stirring to form a HDPE-carrier dispersion system; cooling the HDPE-carrier dispersion system to a constant temperature; The product was collected by filtration and washed with a hydrocarbon solvent; the product was vacuum-dried. The preparation process of the present invention is simple, easy to implement, and the product yield can reach more than 99%. The particle shape of the prepared powder material is spherical, and has the characteristics of controllable size and uniform distribution. The particle size is 50-80 μm, which can Meet the requirements of selective laser sintering 3D printing technology.

Description

technical field [0001] The invention belongs to the technical field of powder materials, and in particular relates to a preparation method of a high-density polyethylene powder material. Background technique [0002] With the general trend of refinement of chemical products, polymer powder materials with special functions are playing an important role in many fields, and their output is growing rapidly. The application of polymer powder materials in coatings, fillers, adhesives, medicine, cosmetics, sintered workpieces and other fields is developing rapidly. With the vigorous development of 3D printing technology, the combination of powder materials and 3D printing technology has increasingly attracted the attention of the public. In 3D printing technology, SLS technology (selective laser sintering technology) has developed the most rapidly. This technology has the characteristics of fast forming speed, good strength and toughness of parts, and low preparation cost. [000...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J3/12C08L23/06
Inventor 李晓庆周建勇鲍春伟裴小静严婕李功韬徐晓范大鹏朱卫东
Owner CHINA PETROLEUM & CHEM CORP
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