Textiles: knitting – Fabrics or articles – Articles
Patent
1999-06-17
2000-09-19
Worrell, Danny
Textiles: knitting
Fabrics or articles
Articles
66191, 66192, 66194, 66195, 66202, D04B 2114, D04B 2120
Patent
active
061194905
DESCRIPTION:
BRIEF SUMMARY
CROSS REFERENCE TO RELATED APPLICATIONS
This application is the U.S. national phase of PCT application PCT/EP97/05607 filed Oct. 10, 1997 with a claim to the priority of German application 196 42 714.2 itself filed Oct. 16, 1996.
FIELD OF THE INVENTION
DESCRIPTION
The invention relates to a material for sound-absorbent and heat-insulating lining of an automotive engine compartment. The material is formed into a molded part and usable as a rigid wall element, housing element, or the like.
The material is mounted in the engine compartment of a motor vehicle and is intended to reduce sound and heat emissions as much as possible. It is mounted on the firewall between the engine and passenger compartments and can also be mounted on the underside of the hood and can be used to encapsulate the engine. The material must be sufficiently heat resistant to withstand the temperatures produced by the vehicle and also be nonflammable, and have a surface that is water- and oil-shedding, as well as resistant to dirt. Of course it also must have limited thermal conductivity and the ability to absorb considerable sound.
In practice glass fibers are added to the fleeces stabilized for the named purposes with phenolic resins with the hot front side being covered with a fleece of glass fibers. The surface weight of the known motor-compartment lining is considerable and the heat-insulating capacity as well as the sound-absorbing capacity could be improved relative to the amount of material used.
German 4,114,408 describes a textile damping material that is made of a pile fleece knit which is formed of a stitch layer holding all fibers and formed of flat stitches as well as upstanding loops. Glass fibers are inserted and also fiber mixtures of glass fibers and carbon fibers are possible. The material is voluminous and one side of the material has a terry or plush-like structure that holds dirt and which can only be adhered with difficult to body parts. It cannot be made rigid for use as a structural part.
Similarly German 4,125,351 describes a textile damping material that is formed of two fiber layers that each have a stitch layer and a layer of upstanding loops. The stitch layers are arranged on the outer faces with the loops forming an intermediate cushion. One layer of fibers can be made of carbon fibers and the other layer can be of natural or synthetic fibers. The material is voluminous and has good heat-damping capacity. Its sound absorbency, in particular the absorption of body noises, is unsatisfactory. As a result of the inadequate sound-absorbing capacity the material is also not suitable for the above-described application. Even this material cannot be made stiff for structural use.
It is an object of the invention to provide a material for the sound- and heat-absorbent lining of the engine compartment of a motor vehicle that has a high heat-insulating capacity, is heat-resistant, that has a dirt-resisting surface, that can easily be used as a structural part in the engine compartment, and whose sound-absorbing capacity is suitable for this use. The material should according to application reduce emission of body sounds and/or air sounds considerably.
The invention and solution of this object is a material for sound-absorbent and heat-insulating lining of an automotive engine compartment comprising compartment, carrier layer each being formed of a pile fleece knit which has a stitch layer of flat stitches holding all fibers as well as a pile loop layer of upstanding cushion-forming loops, the stitch layer which forms the heat-insulating layer turned toward the engine compartment and the back carrier layer which forms the outer faces of the material and the carrier layer being formed of thermoplastic fibers and being formable by hot pressing into a structurally stable body. The stitch layer of the heat-insulating layer preferably has oil- and water-repelling properties.
The carbon-fiber heat-insulating layer has considerable heat resistance. The pile loops, which can have a height of 10-20 mm, form a cushion wi
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patent: 1721096 (1929-07-01), Steffens
patent: 2372497 (1945-03-01), Johnson et al.
patent: 4197723 (1980-04-01), Ehedy et al.
patent: 4631933 (1986-12-01), Carey et al.
patent: 5395684 (1995-03-01), Robinson et al.
patent: 5549965 (1996-08-01), Heinrich et al.
Kittelmann Walter
Schierz Claus
Schreiber Jochen
Asglawo GmbH - Stoffe Zum Dammen und Verstarken
Dubno Herbert
Worrell Danny
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