Multilayer articles and methods for making multilayer articles

1. A sheet, comprising:

a cap layer comprising an acrylic polymer, wherein the cap layer is 10% to 30% of an overall thickness and the overall thickness is 5 mil to 500 mil; and

a base layer comprising a cycloaliphatic polyester copolymer and an aromatic polycarbonate, wherein the cycloaliphatic polyester copolymer is poly(1,4-cyclohexylene dimethylene co-ethylene terephthalate);

wherein the cap layer and base layer were coextruded to form the sheet which is thermoformable;

wherein the sheet has a pencil hardness greater than or equal to 2H; and

wherein the sheet has a tear propagation strength above 5 N/mm.

2. The sheet of claim 1 , wherein the blend comprises 50 wt % to 90 wt % cycloaliphatic polyester, balance polycarbonate.

3. The sheet of claim 1 , wherein the sheet has a tear initiation strength of greater than or equal to 120 N/mm.

4. The sheet of claim 1 , wherein the sheet has a tensile strength greater than 40 MPa.

5. The sheet of claim 1 , wherein the acrylic polymer is an alkyl(meth)acrylate.

6. The sheet of claim 5 , wherein the cap layer is poly(methyl)methacrylate.

7. The sheet of claim 1 , wherein the cap layer is 10% to 25% of the overall thickness.

8. The sheet of claim 1 , wherein the cap layer is on and in contact with the base layer.

9. The sheet of claim 1 , wherein the overall thickness is 5 mil to 40 mils.

10. A method for making an article, comprising:

melting an acrylic polymer in an extruder;

forming a molten mixture comprising a cycloaliphatic polyester copolymer and an aromatic polycarbonate in an extruder, wherein the cycloaliphatic polyester copolymer is poly(1,4-cyclohexylene dimethylene co-ethylene terephthalate);

coextruding the acrylic polymer and the molten mixture to form a sheet which is thermoformable, wherein the molten mixture forms a base layer and the acrylic polymer forms a cap layer on the base layer;

wherein the cap layer is 10% to 30% of an overall sheet thickness;

wherein the sheet has a pencil hardness greater than or equal to 2H; and

wherein the sheet has a tear propagation strength above 5 N/mm.

11. The method of claim 10 , further comprising thermoforming the sheet.

12. The method of claim 10 , wherein the acrylic polymer comprises an alkyl(meth)acrylate.

13. The method of claim 12 , wherein the alkyl(meth)acrylate comprises poly(methyl)methacrylate.

14. The method of claim 10 , wherein the cap layer is 10% to 25% of the overall thickness.

15. The method of claim 10 , wherein the overall thickness is 5 mil to 40 mils.

16. The method of claim 10 , wherein the cap layer is coextruded on and in contact with the base layer.