Process and apparatus for forming plastic sheet

A substrate for liquid crystal display comprising a high quality plastic sheet having an electronic component disposed on at least one side of the sheet;

• wherein the plastic sheet is produced by the process comprising the steps of:
• a) providing molten plastic resin;
• b) directing the molten plastic resin to an overflow die having an inlet and an outlet;
• c) shaping the molten plastic resin into a molten web using said overflow die;
• d) guiding said molten web away from said overflow die;
• and
• e) cooling said molten web to form a solid sheet;
• wherein the resin is a polycarbonate or polycarbonate-polyester comprising one or more bisphenols selected from the group consisting of bis(4-hydroxyphenyl) alkanes and cycloalkanes;
• bis(3-substituted4-hydroxyphenyl) alkyl-cycloalkanes;
• bis(3,5-disubstituted-4-hydroxyphenyl) alkylcycloalkanes;
• 2,2-bis(3-methyl4-hydroxyphenyl)propane;
• 2,2-bis(3,5-dimethyl-4-hydroxyphenyl)propane;
• 1,1-bis(4-hydroxyphenyl)cyclohexane;
• 2,2-bis(3-phenyl-4-hydroxyphenyl)propane;
• 2,2-bis(3-isopropyl-4-hydroxyphenyl)propane;
• 2,2-bis(4-hydroxyphenyl)butane;
• 9,9-bis(4-hydroxyphenyl)fluorene;
• 9,9-bis(4-hydroxy-3-methylphenyl)fluorene;
• 1,1-bis(4-hydroxyphenyl)-3,3-dimethylcyclohexane;
• 1,1-bis(3,5-dimethyl4-hydroxyphenyl)-3,3,5-trimethylcyclohexane;
• 1,3-bis(4-hydroxyphenyl)-5,7-dimethyladamantane;
• 1, 1-bis(4-hydroxyphenyl)-1-phenylethane;
• 4,4′-dihydroxy-tetraphenylmethane;
• 2,2-bis(4-hydroxyphenyl) propane;
• 6,6′-dihydroxy-3,3,3′,3′-tetramethyl-1,1′-spiro(bis)indane, and mixtures thereof;
• and provided that when the plastic resin is a polycarbonate, it does not contain as bisphenol components (1) 1,1-bis(4-hydroxyphenyl)-3,3,5-trimethylcyclohexane;
• (2) a mixture of 2,2-bis(4-hydroxyphenyl)propane and 1,1-bis(4-hydroxyphenyl)-3,3,5-trimethylcyclohexane;
• a blend of (1) and (2);
• or a blend of (1) or (2) with a second polycarbonate containing as a bisphenol component 2,2-bis(4-hydroxyphenyl)propane.