Composite material based on polypropylene, preparation method and application thereof

A composite material and polypropylene technology, applied in the direction of additive processing, etc., can solve the problems that cannot meet the actual needs of 3D printing, and achieve excellent thermal stability, appearance quality, good safety, and high modulus.

Active Publication Date: 2017-10-31
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The mechanical properties of pure PA are better, but at the same time, the tensile strength (injection molding) of pure PA is up to 60MPa. The product that is barely formed after 3D printing has a tensile strength of only about 20MPa, which cannot meet the actual needs of 3D printing.

Method used

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  • Composite material based on polypropylene, preparation method and application thereof
  • Composite material based on polypropylene, preparation method and application thereof
  • Composite material based on polypropylene, preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-3 and comparative example 1-2

[0051] Put the transparent nylon into a vacuum oven and dry at 90°C for 8 hours.

[0052] The raw materials for the experiment were prepared according to the ratio shown in Table 1. At room temperature, they were stirred and mixed at a speed of 500 rpm for 5 minutes and then taken out to obtain a uniform mixture.

[0053] Add the obtained homogeneous mixture into the hopper of the twin-screw extruder, and control the temperature of the twin-screw extruder from the first section to the fifth section at 230°C, 235°C, 244°C, 250°C and 255°C respectively (head temperature), the screw speed is 360 rpm. After the homogeneous mixture is melted and extruded, it is cooled with cooling water at room temperature and granulated.

[0054] Table 1 embodiment 1-3 and the raw material proportioning of comparative example 1,2 (unit: mass part)

[0055]

Example 1

Example 2

Example 3

Comparative example 1

Comparative example 2

Polypropylene

80

70

6...

Embodiment 4

[0062] The polypropylene-based composite pellets obtained in Example 1 were extruded into strands with a diameter of 1.75 mm. Raise the temperature of the nozzle of the 3D printer to 260°C. After the 3D printer is stable, put the above lines into the inlet of the FDM process 3D printer and start printing without using a hot bed. Observe the printing effect, such as figure 1 As shown, the printed samples are not warped, have good precision and high transparency.

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Abstract

The invention relates to a composite material based on polypropylene for 3D printing, a preparation method and an application thereof. The composite material, which is formed by mixing polypropylene and transparent nylon with compatilizer, nucleating agent and stabilizer, has higher safety and combination property, especially has high modulus, high strength, excellent heat stability and appearance quality and especially is suitable for being used as a raw material for 3D printing.

Description

technical field [0001] The invention relates to the field of petrochemical industry. In particular, it relates to a polypropylene-based composite material for 3D printing and its preparation method and application. Background technique [0002] 3D printing (3D Pringting) technology, also known as rapid prototyping technology, rapid prototyping manufacturing technology (Rapid Prototyping Manufacturing, RPM), and additive manufacturing technology, was born in the late 1980s and is a high-tech manufacturing technology based on the material accumulation method. Based on digital model files, it uses powdered metal or plastic and other bondable materials to construct objects by layer-by-layer printing, integrating mechanical engineering, CAD, reverse engineering technology, layered manufacturing technology, numerical control technology, and material science. , laser technology in one, known as "manufacturing technology with industrial revolution significance". A variety of 3D pr...

Claims

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Application Information

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IPC IPC(8): C08L23/14C08L77/06C08L51/06C08K5/20B33Y70/00
CPCC08L23/14C08L2201/08C08L2201/10C08L2205/03C08L2205/08C08L2205/242C08L77/06C08L51/06C08K5/20
Inventor张师军屈晨光董穆高达利邹浩刘建叶邵静波张丽英吕芸李杰初立秋尹华白弈青侴白舸
OwnerCHINA PETROLEUM & CHEM CORP