What are “Generative” Technologies with Regard to Elastomer Parts?
How are parts produced from elastomer materials using generative technologies? At the beginning of 2006, there were three process concepts and three material suppliers available on the market. The processes include laser sintering (a granular polymer material is melted and “baked” with the preliminary layer), stereolithography and 3D printing (the latter is achieved by polymerization using UV laser or lamps in accordance with coating information for photo-monomers). Laser sintering material is a powder based on polyester (TPE-E). The pressure density is achieved by using appropriate fluid infiltration material. It allows for the adjustment of hardness values within a range of 60 to 75 ShA and elongation at break values from 120 percent to 130 percent depending upon laser power.5, 6 Opposite to this, a thermoplastic elastomer based upon polyurethane resin (TPE-U) is used in stereolithography, which demonstrates typical values of 70 ShA where hardness is concerned, and 75 percent with re
