TECASON® P Plate, Unplaned

TECASON® P is industrial grade polyphenylsulfone (PPSU), an amorphous high-temperature thermoplastic that combines sulfone heat resistance with impact strength and hydrolysis resistance the other sulfones cannot match. Tensile strength at yield is 11,500 psi with a 340,000 psi modulus and 60 percent elongation at break, and flexural strength is 13,200 psi. Heat deflection temperature is 405°F at 264 psi, continuous service temperature is 300°F with 360°F intermittent, and the Vicat softening point is 424°F. It is inherently flame retardant at UL 94 V-0, with 381 V/mil dielectric strength and volume resistivity of 9 x 10¹⁵ ohm-cm.

The defining property is tolerance of repeated steam sterilization without loss of dimensions or strength, which drives its use in medical and dental instrument components, sterilization trays and holders, and food processing and hot-water process parts. The high dielectric strength and 300°F rating also suit electrical insulators, connector bodies and terminal blocks. Plate machines predictably; anneal before finish cuts on tight-tolerance parts to relieve stress and avoid crazing. As an amorphous sulfone it is susceptible to environmental stress cracking in ketones, esters and chlorinated solvents, and it will yellow under sustained UV exposure without pigment protection.