초록 ▼

Improved composite materials are disclosed, in which a thermoplastic core layer has at least one inorganic or organic constituent dispersed therein. A first coextruded thermoplastic outer layer is attached to a first surface of the core layer, and is substantially free of dispersed inorganic and org

Improved composite materials are disclosed, in which a thermoplastic core layer has at least one inorganic or organic constituent dispersed therein. A first coextruded thermoplastic outer layer is attached to a first surface of the core layer, and is substantially free of dispersed inorganic and organic constituents, while a second coextruded thermoplastic outer layer is attached to a second surface of the core layer and is also substantially free of dispersed inorganic and organic constituents.

대표청구항 ▼

A coextruded multilayer material comprising an aromatic polycarbonate core layer having a substantial amount of at least one colorant dispersed therein, said colorant being present at a level of from one percent by weight to 40 percent by weight of the total weight of said multilayer material; a tra

A coextruded multilayer material comprising an aromatic polycarbonate core layer having a substantial amount of at least one colorant dispersed therein, said colorant being present at a level of from one percent by weight to 40 percent by weight of the total weight of said multilayer material; a transparent first coextruded aromatic polycarbonate outer layer attached to a first surface of the core layer and substantially free of dispersed colorants; and a transparent second coextruded aromatic polycarbonate outer layer attached to a second surface of the core layer opposite the first surface and substantially free of dispersed colorants, said first and second outer layers each having a thickness sufficient to prevent the migration of the colorant dispersed in said core layer to the surface portions of said first and second outer layers opposite the core layer, said first and second outer layers each having a thickness of from 0.5 mil to about 30 mils.