METHOD OF MANUFACTURING TRANSPARENT AMORPHOUS PLATE FROM CRYSTALLIZABLE THERMOPLASTIC, AND PLATE MANUFACTURED BY THIS METHOD Russian patent published in 2001 - IPC

FIELD: polymer materials. SUBSTANCE: plate 3 to 20 mm thick contains, as main component, crystallizable thermoplastic and also antioxidant. Such plates are manufactured by melting crystallizable thermoplastic jointly with UV stabilizer in extruder at 250-320 C followed by nozzle-assisted molding and calibration in calendar by the aid of at least two rolls, of which the first one is operated in temperature range of 50 to 80 C. Plates are finally planished and cooled before they assume fixed size. Plates are suitable both for internal finish and external applications. EFFECT: increased UV resistance and improved mechanical and optical properties. 18 cl, 4 dwg, 7 ex