A sound-attenuating polyurethane elastomer system can be molded into one-piece floor coverings for cab interiors of heavy-duty and long-haul trucks and other heavy equipment.

A sound-attenuating polyurethane elastomer system can be molded into one-piece floor coverings for cab interiors of heavy-duty and long-haul trucks and other heavy equipment. The new development was a joint effort of Pittsburgh-based Bayer MaterialScience and Durable Products, Inc. of Crossville, Tenn. This application uses Bayer's Bayflex XGT-2 filled PUR elastomer system, which offers an extended gel time that facilitates large-part molding, as well as high density for sound attenuation. It is also said to provide a soft feel for improved driver comfort. Durable Products forms the floor coverings using a RIM process, which is said to offer a number of advantages over rubber sheet, which is typically used in this application. These include the ability to mold parts with deep draws and varying thickness within the part, which creates the opportunity to mold in logos, foot-tread ribbing, undercuts, lips, and additional sound adsorption in specific areas. Such features are difficult to obtain in rubber sheet. Also, the RIM process allows for molding in features that help locate the part for assembly. Moreover, the pigmented PUR system gives a consistent color through the thickness of the floor covering that will not show wear, while rubber mats develop visible worn spots. Bayer: (412) 777-2000 . www.bayermaterialscience.com

Bayer MaterialScience
100 Bayer Rd. Pittsburgh, PA 15205-9741
Phone (412) 777-7677 Fax (412) 777-4478