Elastic nylon composite material for 3D printing and preparation method thereof

Abstract

The invention discloses an elastic nylon composite material for 3D printing and a preparation method thereof. The elastic nylon composite material is prepared from, by weight, 45-50 parts of nylon 12, 15-25 parts of glass fiber, 15-25 parts of a compatibilizer, 25-35 parts of a toughening agent, 0.6-1.2 parts of an antioxidant, 0.3-0.6 part of a lubricant, 0.5-1.0 part of a nucleating agent and 0.2-0.4 part of a light stabilizer; the preparation method comprises the steps that the raw materials are weighed according to the proportion, the dried nylon 12 and the auxiliaries are put into a mixer to be mixed for 8-10 minutes, then discharging is conducted, and a mixture is obtained; then extrusion granulation is conducted through a twin-screw extruder, and the product is obtained. The elastic nylon composite material has the flexibility and resilience of rubber, the comprehensive mechanical strength is high, the bending resistance is excellent, the cost is low, the preparation process is simple, and the material is suitable for industrial production and capable of being applied to 3D printing, and has good application prospects.

Description

technical field [0001] The invention belongs to the technical field of polymer materials and relates to a nylon composite material, in particular to an elastic nylon composite material for 3D printing and a preparation method thereof. Background technique [0002] 3D printing technology, also known as additive manufacturing technology, is an emerging technology in the field of rapid prototyping. It is based on digital model files and uses bondable materials such as powdered metal or plastic to print layer by layer. Techniques for constructing objects. Fused deposition (FDM) technology is a commonly used technology in 3D printing. This technology uses thermoplastic polymers to be extruded from the printing nozzle in a molten state, and then solidified into thin layers of contours, which are then superimposed layer by layer. At present, the commonly used polymer materials in this technology are polylactic acid (PLA), acrylonitrile-butadiene-styrene copolymer (ABS), polycarbon...

AI Technical Summary

Problems solved by technology

[0003] The melting point of long carbon chain nylon and nylon elastomer is low (170-190°C), which can finally be used on commonly used FDM 3D printers (generally, the printing temperature is up to 250-260°C), while the melting point of PA6 / PA66 is at 220°C. Between -260°C, it does not have the melt flow rate required for 3D printing, and it is difficult to be used in the popular FDM 3D printers in the market.

As one of the commonly used materials for 3D printing, nylon PA12 elastomer can be used to manufacture toys and handicrafts with complex structures through fused deposition (FDM) technology, but the cost is too high during use, and there will be certain warpage when forming products Due to technical problems such as deformation and reduced dimensional stability, there are great difficulties in marketing, and it cannot meet the precision requirements of industrial applications for 3D printing large-scale products. Therefore, it is particularly important to develop a cost-effective 3D printing elastic composite nylon material.

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