Multilayer sheet

A multi-layer sheet comprising at least two layers, said at least two layers comprising a first layer and a second layer, wherein:

• (A) said first layer comprises a polyester comprising:
• (a) a dicarboxylic acid component comprising:
• i) 70 to 100 mole % of terephthalic acid residues;
• and
• ii) 0 to 30 mole % of aromatic and/or aliphatic dicarboxylic acid residues having up to 20 carbon atoms;
• and
• (b) a glycol component comprising:
• i) 10 to 40 mole % of 2,2,4,4-tetramethyl-1,3-cyclobutanediol residues;
• ii) 0 to 90 mole % of 1,4-cyclohexanedimethanol residues;
• and
• iii) 0 to 90 mole % of ethylene glycol residues;
• and
• having an inherent viscosity of about 0.4 to about 1.2 dL/g as determined in 60/40 (wt/wt) phenol/tetrachloroethane at a concentration of 0.5 g/100 ml at 25° C.;
• and
• (B) said second layer comprises a polyester comprising:
• (a) a dicarboxylic acid component comprising:
• i) 70 to 100 mole % of dicyclohexane dicarboxylic acid residues;
• ii) 0 to 30 mole % of aromatic and/or aliphatic dicarboxylic acid residues having up to 20 carbon atoms;
• and
• (b) a glycol component comprising:
• i) 40 to 100 mole % of 1,4-cyclohexanedimethanol residues;
• ii) 0 to 60 mole % of ethylene glycol residues;
• and
• having an inherent viscosity of 0.5 to 1.2 dL/g as determined in 60/40 (wt/wt) phenol/tetrachloroethane at a concentration of 0.5 g/100 ml at 25° C.;
• and
• wherein the overall thickness of the sheet is between 100 and 3000 microns.