Shaped body for use as noise absorber for reducing sound emission arising during operation of tire of motor car, has closed mold positioned in inner space, where body is arranged in inner space movable with respect to rim and/or tire

摘要

The body (3) has an annular closed mold positioned in an inner space (7) enclosed by a tire (2) and a rim (1), where the body is arranged in the inner space radially movable with respect to the rim and/or the tire. A positioning aid is equipped with an adhesion surface. A material portion is expanded as an open- or closed-cell and made of a foam material, and polyethylene terephthalate as fleece material. Basis weight of the body is between 400 g/m2 and 1800 g/m2, where material thickness of the body is about 5 mm.