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US 7,927,708 B2Granted
Formable light weight composites
AssigneeProductive Research LLC
InventorShimon Mizrahi
Life of this patent
Estimating the term…
Abstract
The present invention relates to light weight composite materials which comprise a metallic layer and a polymeric layer, the polymeric layer containing a filled thermoplastic polymer which includes a thermoplastic polymer and a metallic fiber. The composite materials of the present invention may be formed using conventional stamping equipment at ambient temperatures. Composite materials of the present invention may also be capable of being welded to other metal materials using a resistance welding process such as resistance spot welding.
Claims20
A light weight composite comprising:
- (i) a first metallic layer;
- (ii) a polymeric layer disposed on the first layer;
- and
- (iii) a metallic fiber distributed within the polymeric layer;
- wherein the polymeric layer includes a filled polymeric material containing a polymer, the polymer having an elongation at failure of at least about 20% at a tensile strain rate of about 0.1 s−1 as measured according to ASTM D638-08;
- so that the resulting composite material may be welded, plastically deformed at strain rates greater than about 0.1 s−1, or both.
3 more elements
A filled polymeric material comprising:
- i. a polymer, the polymer having an elongation at failure of at least about 20% at a tensile strain rate of about 0.1 s−1 as measured according to ASTM D638-08;
- and
- ii. a metallic fiber distributed within the polymer;
- wherein the polymer includes a thermoplastic polymer having a glass transition temperature, Tg, greater than about 80° C., or a melting temperature, Tm, greater than about 80° C.;
- and the volume ratio of the polymer to the metallic fiber is greater than about 2.2:1;
- so that the filled polymeric material is formed into a polymeric layer that may be adhered to at least two metallic layers to form a sandwich composite such that the resulting composite material may be welded, plastically deformed at strain rates greater than about 0.1 s−1, or both.
3 more elements
Dependencies are inferred from the claim text.