Multilayer molded element
A multilayer molded element ( 1 ) is molded to an appropriate shape which conforms to an underside of floor areas or wheel housings of a vehicle. The multilayer structure includes a non-woven, resilient layer ( 3 ) which functions as a shock absorber and spring to absorb impact and damp noise. The resilient layer is disposed between cover layers ( 4, 5 ). Optionally, fabric layers ( 6, 7 ) are bonded to outsides of the cover layers.
1. A multi-layer molded element for bottom covering of an exterior of motor vehicle floor areas or wheel housings, the molded element comprising:
a wheel-side cover layer of a material with thermoplastic properties and having a weight per unit area of 150 to 1500 g/m 2 and a thickness of 100 to 500 μm;
a vehicle underside cover layer of a material having thermoplastic properties and having a weight per unit area of 150 to 1500 g/m 2 and a thickness of 200 to 1000 μm;
at least one of the cover layers being laminated with a non-woven fabric layer with a weight per unit area of 50 to 200 g/m 2 ;
a non-woven resilient layer enclosed between the cover layers, said resilient layer forming an elastic mass system together with the wheel-side cover layer;
the molded element having an overall weight per unit area of 400 to 2000 g/m 2 and overall thickness of 1 to 10 mm.
2. The molded element according to claim 1 , wherein the resilient layer includes a non-woven fabric with a weight per unit area between 200 and 400 g/m 2 .
3. The molded element according to claim 1 , wherein the resilient layer includes foam.
4. The molded element according to claim 1 , wherein the resilient layer includes a layer of air.
5. The molded element according to claim 1 , wherein the resilient layer includes at least one of:
fibrous material,
foam,
air.
6. The molded element according to claim 1 , wherein the wheel-side cover layer includes a resin-treated fibrous material.
7. The molded element according to claim 1 , further including:
a function expanding element.
8. The molded element according to claim 1 , wherein the molded element has a thickness between 3 and 6 mm.
9. The molded element according to claim 1 , wherein both cover layers are laminated on both sides.
10. A multi-layer molded element for bottom covering of an exterior of motor vehicle floor areas or wheel housings, the molded element comprising:
a road-side cover layer of a material with thermoplastic properties and having a weight per unit area of 150 to 1500 g/m 2 and a thickness of 100 to 500 μm;
a vehicle underside cover layer of a material having thermoplastic properties and having a weight per unit area of 150 to 1500 g/m 2 and a thickness of 200 to 1000 μm;
a non-woven resilient layer enclosed between the cover layers, said resilient layer forming an elastic mass system together with the road-side cover layer;
edge sections of the cover layers being directly pressed and bonded together;
the molded element having an overall weight per unit area of 400 to 2000 g/m 2 and overall thickness of 1 to 10 mm.
11. The molded element according to claim 10 wherein
the road-side covering layer has a thickness of 150 to 250 μm.
12. The molded element according to claim 10 wherein the vehicle underside cover layer has a thickness of 300-600 μm.
13. The molded element according to claim 10 , further including:
an aperture into an interior region between the cover layers.
14. The molded element according to claim 13 , wherein the resilient layer includes at least in part, a pocket of trapped gas and the aperture serves for adjustment of elastic properties.
15. The molded element according to claim 10 wherein the road-side cover layer is water impermeable and flexible, such that objects impacting the road-side cover layer flex the road-side cover layer compressing a portion of the resilient layer to distribute the impact and damp noise.
16. The molded element according to claim 15 further including:
a fabric layer bonded to one of the cover layers to absorb high frequency noise.
17. A multi-layer molded element for covering of an exterior of motor vehicle floor areas or wheel housings, the molded element comprising:
a wheel-side cover layer of a material with thermoplastic properties and having a weight per unit area of 150 to 1500 g/m 2 and a thickness of 100 to 500 μm;
a vehicle underside cover layer of a material having thermoplastic properties and having a weight per unit area of 150 to 1500 g/m 2 and a thickness of 200 to 1000 μm;
a non-woven resilient layer enclosed between the cover layers, said resilient layer forming an elastic mass system together with the wheel-side cover layer;
edge sections of the molded element being padded;
the molded element having an overall weight per unit area of 400 to 2000 g/m 2 and overall thickness of 1 to 10 mm.
18. A multi-layer molded element for bottom covering of an exterior of motor vehicle floor areas or wheel housings, the molded element comprising:
a wheel-side cover layer of a material with thermoplastic properties and having a weight per unit area of 150 to 1500 g/m 2 and a thickness of 100 to 500 μm;
a vehicle underside cover layer of a material having thermoplastic properties and having a weight per unit area of 150 to 1500 g/m 2 and a thickness of 200 to 1000 μm;
a non-woven resilient layer enclosed between the cover layers, said resilient layer forming an elastic mass system together with the wheel-side cover layer;
the molded element having an overall weight per unit area of 400 to 2000 g/m 2 and overall thickness of 1 to 10 mm and having T-shaped structures for attachment.
19. A multi-layer molded element for covering of an exterior of motor vehicle floor areas or wheel housings, the molded element comprising:
a wheel or road facing cover layer of a material with thermoplastic properties and having a weight per unit area of 150 to 1500 g/m 2 and a thickness of 100 to 500 μm;
a vehicle facing cover layer of a material having thermoplastic properties and having a weight per unit area of 150 to 1500 g/m 2 and a thickness of 200 to 1000 μm;
a non-woven resilient layer enclosed between the cover layers, said resilient layer forming an elastic mass system together with the wheel or road facing cover layer;
edge areas of the molded element being compressed;
the molded element having an overall weight per unit area of 400 to 2000 g/m 2 and overall thickness of 1 to 10 mm.