Silicone rubber composite material for SLS (selective laser sintering), preparation method of composite material and application of composite material

Abstract

The invention relates to the technical field of high-molecular material machining, in particular to a silicone rubber composite material for SLS (selective laser sintering), a preparation method of the composite material and an application of the composite material. The silicone rubber composite material comprises, by weight, 100 parts of silicone rubber, 0.1-10 parts of conductive fillers, 0.1-0.2 part of light stabilizers, 0.1-0.3 part of antioxidants and 0.1-0.5 part of flow modifiers. According to the preparation method of the composite material, raw materials are uniformly mixed and prepared into powder to obtain the silicone rubber composite material, and the average grain diameter of the powder material is 10-150 micrometers. The composite material is simple in preparation process and low in cost, prepared silicone rubber composite material powder printing parts have good size accuracy and excellent conductive properties and electromagnetic properties and are applied to the aspects such as flexible electrodes and wearable electronic devices, the application range of an SLS technique is greatly widened as compared that materials such as nylon used by the current SLS only canacquire rigid products.

Description

technical field [0001] The invention relates to the technical field of polymer material processing, in particular to a silicone rubber composite material used for SLS and its preparation method and application. Background technique [0002] Selective Laser Sintering (Selective Laser Sintering), it is based on the computer three-dimensional design model, using metal powder, ceramic powder, polymer powder materials to obtain products through layer-by-layer printing and superposition molding. It has the advantages of no support structure and high strength of printed parts. [0003] The selective laser sintering process is the most widely used 3D printing technology. Its basic idea was proposed by C.R. Dechard of the University of Texas at Austin in 1986, and the selective laser sintering process was successfully developed in 1989. This process is the fastest-growing, most successful and commercialized 3D printing method. Using this technology, not only accurate models and prot...

AI Technical Summary

Problems solved by technology

[0004] However, the biggest problem with the selective laser sintering process is that the polymer materials available for sintering are very limited and relatively expensive, so it is necessary to develop new polymer materials suitable for selective laser sintering

There are very few polymer materials that can be used for laser sintering on the market. At present, nylon materials are the most widely used, including nylon 12, nylon 11, nylon 6, etc., accounting for more than 95%, while other polymer materials that can be used for laser sintering Such as polycarbonate, polystyrene, polyether ether ketone, etc. have less applications

At the same time, the properties of the products obtained by these materials through the selective laser sintering process are still far behind those obtained by traditional processing techniques, such as injection molding, extrusion and casting, and the cost is much higher. The 3D printing technology based on the permanent laser sintering process has not been used in the industrial production of products

[0005] In addition, the currently used polymer materials based on nylon-12 are all rigid products obtained by laser sintering, which have high hardness and poor flexibility.

Images