IMPACT RESISTANT UNDERBODY SHIELD MATERIALS AND ARTICLES AND METHODS OF USING THEM

摘要

Underbody shield materials that can provide an underbody shield with high impact resistance are described. In some configurations, an underbody shield composition comprises a porous core layer comprising a plurality of reinforcing fibers, a lofting agent and a thermoplastic material. In some instances, the underbody shield composition may also comprise a film such that an underbody shield produced from the composition can withstand at least 50 individual impacts as tested using a SAE J400 protocol.

主权项

1. An underbody shield composition comprising:
a thermoplastic core layer comprising a web of open celled structures defined by random crossing over of reinforcing fibers held together by a thermoplastic polymer, the thermoplastic core layer further comprising a lofting agent effective to increase a thickness of the core layer upon exposure to heat to provide a post lofted core layer; a film disposed on a first surface of the core layer,in which the post lofted core layer and film together provide an underbody shield article that can withstand at least 50 individual impacts according to a SAE J400 protocol without damage to the film.