Thermal properties of the Lexan films
Thermal deformation resistance
During these tests the sample is treated with a controlled tensile and bending stress. The higher the values are the higher is the thermal resistance of the material in the application area. The mechanical properties of all thermoplastics change with the impacted temperature. This procedure is slow and nearly linear for amorphous polymers like Lexan® polycarbonate and Ultem® polyetherimide. Valox® thermoplastic polyester shows a distinctive dependency to the temperature as it is a crystalline polymer. Diagram 3 illustrates the tensile modulus as function of the temperature.
GE films often are a good choice for high temperature applications because of their high thermal stapability.
The wide softening range of Lexan® and Ultem® simplifies the thermal forming. Screen printed Lexan® film can be cured at temperatures up to 120°C.