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Bayer, solid composites developing new high-tech materials forlaser sintering - China Plastic Injec by guo ping
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Bayer, solid composites developing new high-tech materials forlaser sintering - China Plastic Injec by GUO PING
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| Article Posted: 11/27/2013 |
| Article Views: 171 |
| Articles Written: 1013 - MORE ARTICLES FROM THIS AUTHOR |
| Word Count: 450 |
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Bayer, solid composites developing new high-tech materials forlaser sintering - China Plastic Injec |
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Business,Business News,Business Opportunities
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Partners Bayer MaterialScience and Solid Composites GmbH , a spinoff of the Fraunhofer Institute for Environmental, Safetyand Energy Technology (UMSICHT), are developing thermoplasticpolyurethane (TPU) powders for selective laser sintering to fabricate three-dimensional structures . The new high-tech materials, licensed and marketed by SolidComposites under the brand name Desmosint, opens the door tonumerous potential applications, from automotive to sporting goodsto robotics to aerospace engineering. "Solid Composites has made a name for itself as a creativedeveloper and supplier of thermoplastic powders for laser sinteringand electrostatic coating, among other things, and is therefore thepartner of choice for us when it comes to successfully marketingour TPU innovation," stated Jurgen Hattig, TPU marketingspecialist at Bayer MaterialScience. Selective laser sintering is a digital manufacturing method for the additive manufacturing of plastic parts.
A part is made from a thermoplastic powder based on structuraldesign data; guided by CAD software, a laser fuses successivelayers of a powder bed at selected points where the part is toemerge, effectively growing the part layer by layer. Eliminatingthe need for molds cuts costs considerably, and unlike injectionmolding, parts with complex geometries (e.g. cavities andundercuts) can be rendered, noted Marcus Rechberger, generalmanager of Solid Composites. Primarily soft, elastic materials and rigid thermoplastics such aspolyamide have been commercially available for selective lasersintering.
Bayer's TPU materials close this gap with qualities ofhigh toughness, elasticity, and strength, and enable significantenergy and cost savings. They can be processed layer by layer at aconstant temperature of only 80 C, whereas polyamide is processedat slightly below its melting temperature -- resulting insignificant energy savings. TPU also has a very low tendency towarp, and non-sintered powder does not age inside the processingspace and can be reused. And at the end of the part's service life,the plastic is fully recyclable. Selective laser sintering is particularly suited to the additivemanufacturing of short to extremely short runs, for example in theproduction of components of housing parts, bellows, and hoses forfull-size and luxury sedans.
Using TPU materials opens the door toproduce more custom components such as orthopedic shoe inlays,athletic shoes, helmets, and prosthetic devices -- and could extendto high-volume production of other parts and applications requiringintricate geometries and where injection molding costs would behigh. "In these scenarios, the use of several sinteringmachines can be more cost efficient," Rechberger explains.
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