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Preparation method of ABS (acrylonitrile butadiene styrene) composition for 3D printing

A 3D printing and composition technology, which is applied in the field of ABS composition preparation, can solve the problems of poor processing rheological properties, inability to completely melt, incompetence in static mechanical properties and dynamic mechanical properties, etc., and achieve rigidity and impact strength improvement , Improving the stability of melting processing and ensuring the effect of customized precision

Active Publication Date: 2016-04-27
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because ABS can only be classified as ordinary engineering plastics, the strength and performance of this material and the products obtained by the supporting 3D printing process are only slightly higher than ordinary thermoplastics, and it is difficult to reach the grade of engineering plastics such as nylon and polycarbonate.
Its static mechanical properties and dynamic mechanical properties are not suitable for the needs of patients who need frequent exercise and rehabilitation in daily life
[0007] If the general modification method is used to prepare alloys such as PC / ABS and PA / ABS, these materials cannot be completely melted at 270°C, the processing rheological properties are poor, and the local stress concentration cannot be eliminated. Not only the strength of the product cannot be guaranteed, but also its 3D The accuracy of printed products cannot be guaranteed
In this way, the advantages of personalized customization cannot be reflected, and in severe cases, it will bring various troubles to patients, and even endanger the safety of patients.

Method used

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  • Preparation method of ABS (acrylonitrile butadiene styrene) composition for 3D printing
  • Preparation method of ABS (acrylonitrile butadiene styrene) composition for 3D printing
  • Preparation method of ABS (acrylonitrile butadiene styrene) composition for 3D printing

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preparation example Construction

[0029] The preparation method comprises steps:

[0030] (1) Premixing: Add ABS, SEBS grafts, PC-PPO block copolymers, nanofillers, glass fibers, aminosilane coupling agents, antioxidants and light stabilizers to the mixer in sequence for premixing, and the mixing temperature The temperature is 20-30°C, the rotation speed is 100-300 rpm, and the mixing time is 1-3 minutes.

[0031] (2) Extrusion granulation: Add the pre-mixed material from the feeder to the stretching flow extruder, melt extrusion granulation, the screw speed is 100-200 rpm, and the main feeder speed is 10-60 rev / min. The temperature of each section of the extruder is 190-250°C.

[0032] The ABS composition granules used for 3D printing after air-drying at 60-80°C were injection-molded at 190-230°C into test specimens specified in national standards, and the tensile properties, impact properties and fatigue resistance were tested respectively.

[0033] The mechanical properties of the ABS composition used fo...

Embodiment 1

[0035]Weigh each raw material according to the following proportions: ABS mass fraction is 55 parts, SEBS graft substance mass fraction is 8 parts, PC-PPO block copolymer mass fraction is 23 parts, nano-β-tricalcium phosphate mass fraction The parts are 5 parts, the glass fiber mass parts are 12 parts, the aminosilane coupling agent KH550 mass parts are 0.7 parts, the main antioxidant mass parts are 0.4 parts, and the antioxidant 168 mass parts are 0.6 parts, Light stabilizer 944 parts by mass is 0.3 part. Add ABS, SEBS graft, PC-PPO block copolymer, nano-β-tricalcium phosphate, glass fiber, aminosilane coupling agent, antioxidant and light stabilizer to the mixer for pre-mixing, and the mixing temperature is 25 °C, the rotation speed is 150 rpm, and the mixing time is 3 minutes. The premixed material is fed into the stretching flow extruder from the feeder, melted and extruded to granulate, the screw speed is 120 rpm, and the main feeder speed is 20 rpm. The temperature of ...

Embodiment 2

[0038] Weigh each raw material according to the following proportions: ABS mass fraction is 50 parts, SEBS graft substance mass fraction is 10 parts, PC-PPO block copolymer mass fraction is 28 parts, nano-β-tricalcium phosphate mass fraction The parts are 7 parts, the glass fiber mass parts are 10 parts, the aminosilane coupling agent KH550 mass parts are 0.5 parts, the main antioxidant mass parts are 0.5 parts, and the antioxidant 168 mass parts are 0.5 parts, Light stabilizer 944 parts by mass is 0.5 part. Add ABS, SEBS graft, PC-PPO block copolymer, nano-β-tricalcium phosphate, glass fiber, aminosilane coupling agent, antioxidant and light stabilizer to the mixer for pre-mixing, and the mixing temperature is 20 °C, the rotation speed is 200 rpm, and the mixing time is 2 minutes. The premixed material is fed into the stretching flow extruder from the feeder, melted and extruded to granulate, the screw speed is 150 rpm, and the main feeder speed is 30 rpm. The temperature o...

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Abstract

The invention discloses a preparation method of ABS (acrylonitrile butadiene styrene) composition for 3D printing. The composition comprises, in parts by mass, 45-55 parts of ABS, 8-14 parts of an SEBS (styrene-ethylene-butylenes-styrene) graft, 23-34.4 parts of a PC-PPO (polycarbonate-polyphenylene oxide) segmented copolymer, 0.3-0.7 parts of an amino silane coupling agent, 5-9 parts of nano filler, 5-12 parts of glass fibers, 0.6-1.1 parts of an antioxidant and 0.3-0.7 parts of a light stabilizer. The ABS composition for 3D printing is prepared through extrusion and blending of elongational flows as well as reactive compatibilization. The composition has good melt processing stability, good tensile strength, good rigidity and good anti-impact strength, and can guarantee customization precision of printed products and product strength and guarantee that a patient uses 3D printed products safely in the recovery process when the composition is applied to 3D printing aiding medical instruments.

Description

technical field [0001] The invention relates to the field of polymer materials and their molding processing, in particular to a preparation method of an ABS composition for 3D printing. Background technique [0002] Industrial civilization has greatly promoted the progress of human society, and the number of people that the earth, the only home of mankind, can support has also rapidly expanded to the 7 billion mark within half a century. However, industrialized production, changes in supply patterns, and changes in human lifestyles have also brought about many negative effects, among which the number of physically / skeletally disabled people who need medical assistance has increased significantly is the most prominent social problem. Traffic and accidental injury accidents, local wars, etc. have also formed a large group of physically disabled to a certain extent. According to statistics, the number of deaths due to accidental injuries every year, burns are second only to tr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L55/02C08L51/00C08L87/00C08K13/04C08K7/14C08K3/32C08K5/544B33Y70/00
CPCC08L55/02C08L2205/03C08K2201/011C08K2201/003C08L51/006C08L87/005C08K13/04C08K7/14C08K2003/325C08K5/544
Inventor 杨军忠任力王迎军
Owner SOUTH CHINA UNIV OF TECH
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