SLA-Stereo Lithography Appearance technology, using photosensitive resin 3-D printing materials: milky white texture, good strength, but relatively small toughness, small and thin brittle fracture, but easy to grind, electroplating, painting and coloring. Photosensitive resin is composed of two parts, namely photoinitiator and resin (resin consists of prepolymer, diluent and a small amount of additives). The amount of photoinitiator and diluent has an important influence on the curing speed and quality of photosensitive resin. When the proportion of photoinitiator and diluent is appropriate, not only the curing speed is fast, but also the curing quality is good. Therefore, in order to select large brand manufacturers, mature and stable photosensitive resin 3D printing materials are very important. In terms of performance, there are also some imported photosensitive resin materials with high strength, transparency, high temperature resistance, moisture resistance and waterproof functions. In addition, three-dimensional printing materials of composite ceramics, such as alumina (AI2O3) m zirconia (ZRO2), hydroxyapatite (HAP), tricalcium phosphate (TCP) and so on, which are similar to high-resolution ceramic powder and photosensitive resin, can be selected.
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