Appliance Design - May 2008 - (Page 29)

ELASTOMERS the elastomeric properties, Bruner says. The dielectric materials can be made electrically conductive or can be made to be EMI resistant. “The silicone materials are versatile and can be used in damping applications, bonding, optically clear systems, tubing. Pretty much anything can be made with it and can be made tough enough for just about any environment,” Bruner says. NuSil also has a new product out that is geared for medical devices requiring color. The MED-4900-X series of color masterbatches has been formulated to use with liquid silicone rubber products, It can pumped in via a third line in injection molding processes for medical devices. Versatility is also a key benefit of silicone products from Multibase, a subsidiary of Dow Corning. The company offers TPSiV™, a ThermoPlastic Silicone Vulcanizate. The materials are a family of TPV products based on cross-linked silicone rubber dispersed into various engineering thermoplastics. The dispersion of the silicone internal phase is produced by dynamic “vulcanization” or cross-linking of silicone polymers within the thermoplastic organic phase. TPSiV combines the elastomeric performance of silicone rubber with the melt re-processability and thermal and chemical resistance of engineering thermoplastics and can be processed on standard thermoplastic equipment through a variety of methods, including extrusion, injection molding, co-molding, over-molding and co-extrusion. In addition, selective grades can be bonded to PC, ABS, PU, PVC and PA substrates without adhesives or primers, says Gifford Shearer, Innovation & Portfolio manager for Multibase. Various grades are offered with a range of mechanical properties and degrees of tactile response. The use of silicone elastomers is traditionally thought of as materials for use in specific high-end applications, but, that is changing. For instance, DiPino points to an espresso machine application in Europe. “The strong espresso is pretty corrosive,” he said, “It wants to attack the material, so we had to modify and improve the elastomer’s oil resistance and make it so it has high temperature resistance. Those units operate at 80 to 90 DegC (176 DegF to 194 DegF). The versatility of silicone elastomers has extended their use to a growing number of applications. The medical device and the espresso machine are just two examples of uses for this versatile material. As new materials and new fabrication methods continue to be developed, more design engineers are expected to calculate their cost versus performance equation in favor of silicones. < For more information, enter numbers: Dow Corning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 304 Or email: chip .reeves@dowcorning .com NuSil . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 305 Or email: SteveB@nusil .com Momentive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 306 Or email: Nancy .Pitts@momentive .com Phillips Plastics Corp . . . . . . . . . . . . . . . . . . . . . . . . . . 307 Or email: David .Wolgemuth@phillipsplastics .com Wacker Chemical Corp . . . . . . . . . . . . . . . . . . . . . . . . . 308 Or email: info .usa@wacker .com A Product of its Environment Problem: The operating environment inside your particular appliance may cause thermal controls to act differently than you expected. Solution: 1 Involve a Pepi sales engineer 2 Choose the right control 3 Customize to meet application needs ® Pepi® thermal controls can be customized in a variety of ways to ensure reliability in virtually any application. To learn more about how easy and affordable it is to get the right device for your particular application, visit our special Proto • Type web site. www.pepiusa.com/prototype.html Only Pepi® thermostats and thermal protectors offer so many options in fit, configuration, cost and customization. For a close look send for our new Disc-Type and Conductive-Type Catalogs today. www.pepiusa.com Portage Electric Products, Inc. N. Canton, OH U.S.A. salesinfo@pepiusa.com • 1-888-GO4-PEPI For more Information Enter 106 www.applianceDESIGN.com AD04084Port.indd 1 applianceDESIGN May 2008 29 3/10/08 9:33:26 AM http://www.pepiusa.com/prototype.html http://www.pepiusa.com http://www.pepiusa.com http://www.appliancedesign.com

Table of Contents Feed for the Digital Edition of Appliance Design - May 2008

Appliance Design - May 2008 Contents Editorial Shipments/Forecasts News Watch New and Notable Displays & Indicators Elastomers Quality & Standards Indoor Air Quality IHHS Highlights New Products Classifieds Design Marts Advertiser’s Index Association Report: PSMA

Appliance Design - May 2008

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