Patent ID: 7255916

Claim:
A laminate, comprising: at least two metal sheets, each having a thickness of less than 1.5 mm; a plastic layer disposed between the at least two metal sheets; wherein the plastic layer is bonded to the at least two metal sheets; wherein the plastic layer comprises a plastic material and basalt fibers; wherein the basalt fibers constitute 35-75% of a combined volume of the plastic material of the plastic layer and the basalt fibers together; wherein the basalt fibers have a modulus of elasticity of 90-120 GPa; wherein the basalt fibers include 35-55 weight % of SiO2; wherein the basalt fibers include 10-25 weight % of Al2O3; wherein the basalt fibers include 3-10 weight % MgO ; and wherein the at least two metal sheets include a material with a tensile strength exceeding 0.20 GPa.