The invention relates to waterproof deadening felt in an automobile metal plate cavity and a production method of the waterproof deadening felt. The waterproof deadening felt fits an automobile metal plate in shape completely, and the metal plate cavity is filled up. The waterproof deadening felt comprises a hard waterproof foamed material and a soft foamed material, wherein the hard waterproof foamed material forms the outer edge of the waterproof deadening felt, and the soft foamed material forms the middle layer structure of the waterproof deadening felt. Compared with the prior art, the waterproof deadening felt has the advantages that another hard waterproof foamed material is composited on the basis of common polyurethane foaming, so that sound absorption, sound deadening, waterproofing and shock resistance performance can be achieved.
Waterproof deadening felt in automobile metal plate cavity and production method of waterproof deadening felt
2015-06-24
Patent
Electronic Resource
English
European Patent Office | 2016
|SOUND ABSORPTION AND DEADENING
SAE Technical Papers | 1934
|Product Report - Modular Sound Deadening Enclosures
Online Contents | 1996