K. Patel Metal Industries Pvt Ltd manufactures Polyvinyl Acetal Thermal. This 9001-2000 ISO certified company K. Patel Metal Industries Pvt Ltd is the manufacturer of Enamelled Round Copper wires. Polyvinyl Acetal Thermal is available in size ranges 8 swg to 25 swg or 4. 00 and 0.50 mm. This Polyvinyl Acetal Thermal is used in dry type transformers, AC/ DC motors, alternators and relay coils.