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A kind of polypropylene wire rod and preparation method thereof for 3D printing

A 3D printing, polypropylene technology, applied in the field of 3D printing technology and plastic processing, can solve the problems of expanding polypropylene material, polypropylene material warpage, etc., and achieve the effect of reducing shrinkage deformation, easy operation, and shrinkage deformation reduction

Active Publication Date: 2020-07-28
WANHUA CHEM GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The purpose of the present invention is to provide a polypropylene wire rod for 3D printing to overcome the serious warping problem of existing polypropylene materials for 3D printing due to crystallization. It also improves the warping phenomenon by reducing the crystallinity of polypropylene materials, so that the polypropylene wire rod for 3D printing has a good 3D printing effect, which is of great significance for expanding the application of polypropylene materials in the field of 3D printing

Method used

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  • A kind of polypropylene wire rod and preparation method thereof for 3D printing
  • A kind of polypropylene wire rod and preparation method thereof for 3D printing
  • A kind of polypropylene wire rod and preparation method thereof for 3D printing

Examples

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preparation example Construction

[0042] A method for preparing a polypropylene wire rod for low warpage 3D printing, comprising the following steps:

[0043] (1) Mixing of reagents and raw materials: first put copolymerized polypropylene and thermoplastic elastomer into the mixer, then add plasticizer, and stir until the surface of the particles is liquid and bright, that is, stir evenly. After the mixing is completed, add low melting point The homopolypropylene and the stabilizer were subsequently mixed, and the mixing was continued for 2 minutes to finally obtain the mixed raw material.

[0044] (2) Heated extrusion: Add the mixed raw materials in step (1) to the main feeding bin of the twin-screw extruder, add the inorganic filler to the side feeding bin of the extruder, and add them to the extruder according to the proportion of the components The melting and mixing are uniform, and the feeding speed is kept uniform and smooth to ensure that no blockage occurs during the extrusion process, and the filamen...

Embodiment 3-8 and comparative example 4

[0084] According to the composition of each component of Example 3-8 and Comparative Example 4-5 in Table 5, the polypropylene wire rod for 3D printing was prepared according to the above preparation method, and Table 5 also includes the preparation of Example 3-8 and Comparative Example 4-5 Polypropylene wire melt flow index, shrinkage and warpage test data. It can be seen that within the composition range of the present invention, the polypropylene wire prepared in Examples 5-8 has processing performance and molding accuracy, and the molding shrinkage deformation and warpage are very small, which is very suitable for use as a material for 3D printing. In Comparative Example 4, since the content of the copolymerized polypropylene and homopolypropylene components is not within the scope limited by the present invention, although its melt flow index is 7.1 g / 10min, its shrinkage rate and warpage height also increase significantly.

[0085] Table 5 embodiment 3-8 and comparative...

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Abstract

The invention discloses a polypropylene wire material for 3D printing and a preparation method thereof. The polypropylene wire material is composed of co-polypropylene, low-melting-point homo-polypropylene, inorganic filler, thermoplastic elastomers, a plasticizer and a stabilizer. The polypropylene wire material is low in material crystallinity degree, shrinkage distortion and warping, has good 3D printing effects and printing accuracy, and can reduce cost to a large extent. The preparation method for the polypropylene wire material for 3D printing is simple in technology and lower in production equipment requirement, can achieve large-scale production and popularization, and has a wide market prospect.

Description

technical field [0001] The invention relates to the fields of 3D printing technology and plastic processing, in particular to a polypropylene wire rod for 3D printing and a preparation method thereof. Background technique [0002] 3D printing refers to a technology that uses bondable materials such as powdered metal or plastic to construct objects by layer-by-layer printing and layer-by-layer accumulation based on digital model files. Completely different from traditional material surface forming (such as injection molding) and removal molding processes, 3D printing technology can quickly manufacture three-dimensional solid parts of any complex shape without fixtures or molds, which can greatly shorten product development cycles and Reduce product development costs. With the continuous maturity of 3D printing technology, 3D printing technology has been practically applied in many fields such as biomedicine, information technology, precision machinery, etc., and has shown in...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/14C08L23/12C08L23/08C08L91/00C08K13/02C08K5/12C08K5/053C08K3/34C08K3/26C08K5/134C08K5/526B33Y70/10
CPCB33Y70/00C08K2003/265C08L23/14C08L2205/035C08L23/12C08L23/0815C08L91/00C08K13/02C08K5/12C08K5/053C08K3/34C08K3/26C08K3/346C08K5/1345C08K5/526
Inventor 王绍杰宋林苗春萌刘东明霍江贝颜晓捷费晨洪杨杰张红陈海波
Owner WANHUA CHEM GRP CO LTD
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