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Stiffener damper

IP.com Disclosure Number: IPCOM000132547D
Publication Date: 2005-Dec-21
Document File: 1 page(s) / 50K

Publishing Venue

The IP.com Prior Art Database

Abstract

This invention describes the addition of cross-linkable resin to classical damping formulations, in order to have a stiffening function in addition to the existing damping function.

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This is the abbreviated version, containing approximately 75% of the total text.

MONOLAYERSTIFFENER DAMPER

 

This invention concerns damping sheets. Dampers are usually made of a mix of bitumen and/or polymers and fillers, and are mainly used in the automotive market. Damping sheets are applied on car steel sheets and are fixed by means of a thermofusible glue or a self-adhesive. They are generally heated during the electrophoresis and painting heating cycles by car manufacturers.

This invention describes the addition of cross-linkable resin to classical damping formulations, in order to have a stiffening function in addition to the existing damping function.

The cross-linkable resin comes from the recycling of powder paintings. Its cross-linking temperature is high enough so that  the resin can pass through the manufacturing process of damping sheets without troubles. The cross-linking reaction only occurs when the product is heated in the electrophoresis and painting ovens of car manufacturers. Principle :

-         The part of the formulation based on bitumen enables to have the required damping performances.

-         The cross-linking reaction that occurs thanks to the introduction of the cross-linkable resin enables to stiffen the steel sheet on which the product is applied.

-         The cross-linked product enables to obtain higher damping performances than a classical damper in the high temperature range.

The final product combines 2 functions : damper and stiffener. It enables the use of only one product instead of a damper and an additional stiffening part. Moreover,...