A kind of material and preparation method thereof for 3D printing

Abstract

The invention discloses a material for 3D printing, which comprises 60%-96.5% of ethylene-vinyl acetate copolymer, 1%-6% of emulsion polystyrene-butadiene rubber, 1%-6% of solution polystyrene-butadiene rubber, auxiliary Modified material 2%-6%, the auxiliary modified material mainly includes crosslinking agent 5%-22%, compounding agent 38%-57%, antioxidant 8%-17%, toughening agent 4%-7% , Anti-hydrolysis agent 8%-17%, melt fusion enhancer 5%-20%. In addition, the present invention also relates to a preparation method of the material. The 3D printing material of the present invention can be printed in a wider range of hardness, can realize a variety of hardness gradients, and has the characteristics of high fluidity, high toughness, low shrinkage, and high printing accuracy, and is suitable for rapid prototyping of fused deposition 3D printing. It satisfies the molding process of 3D printed materials well.

Description

technical field [0001] The invention belongs to the technical field of 3D printing, and in particular relates to a material for 3D printing and a preparation method thereof. Background technique [0002] In recent years, 3D printing methods have gradually entered the application field, and have been more and more widely used in aerospace, furniture products, biomedical, large-scale equipment and other fields. The development of 3D printing methods can produce a variety of personalized products with special functions, and will promote large-scale personalized customization as an important production model, improve product development levels, and accelerate the development of advanced manufacturing industries. extremely important. [0003] The core of 3D printing is its subversion of the traditional manufacturing model. Therefore, the most critical process of printing lies in the material research and development process based on mechanical manufacturing. During the printin...

AI Technical Summary

Problems solved by technology

For example: (1) The polymeric materials based on graphene oxide and aniline mentioned in the invention patent "Graphene oxide-based 3D printing materials and 3D printing products and their preparation methods" (publication number CN106315575A), although they can be molded Good resistance, easy to store for a long time, but cannot use fused deposition modeling technology, and aniline is toxic to the human body

(2) Thermoplastic resins and alloys containing rare earth elements mentioned in the invention patent "a composition for 3D printing, 3D printing material containing it, its preparation method, application and 3D printing equipment" (publication number CN105713362A) Although the powder has the advantages of being directly used for fused deposition molding, low cost, simple preparation process, and high safety, the hardness of the finished product is still very different from the biological tissue structure in the medical field.

(3) Although the modified low-density polyethylene mentioned in the invention patent "Preparation method of graphene / styrene-butadiene rubber modified low-density polyethylene for 3D printing" (publication number CN106519379A) ​​has a hardness variable range similar to that of human tissue , but there is no way to apply it to bone, cartilage, muscle and other tissues at the same time, and the heating temperature is not easy to control, and it is prone to thermal aging

Existing 3D printing materials used for human tissue have a small variable range of hardness, and it is difficult to adapt to the gradient changes of human tissue through a material formula, making the existing 3D printing materials not highly adaptable

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