Photosensitive resin, is a liquid stable 3D printing material, usually including polymer monomer, prepolymer and UV initiator and other components, 3D Printing Resin in the printing process, the ultraviolet light instantaneous curing, so the shape of such materials after the surface Smooth and smooth, high resolution products, the details of outstanding display, the quality can even exceed the injection products. 3D Printing Resin These outstanding advantages make the photosensitive resin the first choice for high-end artwork 3D printing.
However, the current production of photosensitive resin costs are still high, and mechanical properties and heat resistance is lower than the ABS engineering plastics, to a certain extent, the impact of the application of photosensitive resin. The current situation, 3D Printing Resin photosensitive resin research and development and production are more active, a wide variety, but the real access to the consumer market and industrial applications are more limited.
The main types are epoxy acrylate, 3D Printing Resin unsaturated polyester, polyurethane acrylate, etc., these resins have their own different advantages and disadvantages, of which epoxy acrylate has a high hardness after curing, small volume shrinkage, chemical stability Good and so on, but the viscosity is too large, is not conducive to the molding process; and unsaturated polyester viscosity suitable and easy to shape, but after curing hardness and strength is poor, easy to shrink; polyurethane acrylate has good toughness, 3D Printing Resin Optical properties, but its polymerization activity and chromaticity control is more difficult. Therefore, the commercial photosensitive resin is often a combination of a variety of photosensitive polymers in order to achieve the effect of learning from each other. For example, the use of alicyclic glycidyl esters, 3D Printing Resin bisphenol A type epoxy resins, epoxy acrylates, alicyclic epoxy resins, 1,4-cyclohexyl dimethanol divinyl ether, polypropylene glycol di Glycidyl ether diacrylate with appropriate initiator to prepare a new type of photosensitive resin with moderate viscosity, good photosensitivity, small volume shrinkage of cured product and good mechanical properties and thermal properties.
Compared with ABS plastic, 3D Printing Resin there is a great deal of flexibility in the production of photosensitive resin materials. It can be doping with other substances according to the actual requirements, so as to produce 3D printing materials with special properties.
Photosensitive resin printing the main process: three-dimensional flat-panel printing and polymer jetting.
Stereo lithography apparatus (SLA), also known as light curing rapid prototyping, three-dimensional lithography, is the first practical 3D printing process. 3D Printing Resin The process uses liquid photosensitive resin for printing supplies, the principle of the use of laser beam point by point scanning liquid photosensitive resin to cure. As the earliest rapid prototyping process, SLA has undergone long-term commercial testing, in the process itself and material development have a higher maturity.
Polyplastics (Polyjet) is also a photosensitive resin for the printing material printing process, forming the principle and FDM is somewhat similar, 3D Printing Resin but the nozzle is not sprayed thermoplastic filamentous supplies, but the liquid photosensitive polymer, while the need for a UV lamp As a curing source. In general, when the photosensitive polymer material is sprayed onto the table, the UV ultraviolet light will emit ultraviolet light along the direction of the nozzle to cure the photosensitive polymer.