Three Impet polyethylene terephthalate (PET) resins form smooth, glossy surfaces at mold temperatures of 90 to 100°C. This lets parts be molded in water-cooled tools rather than the oilcooled ones commonly used by most PETs. The resins contain glass-mineral filler at loadings of 35% (Impet PET FC835), 40% (Impet PET FC840), and 45% (Impet PET FC845). They also have improved flow and cycle times for injection-molding components. During testing, Impet PET FC840 produced a surface finish with a 60° gloss of 61.3. Its FC835 counterpart was much rougher and had a gloss of just 11.2.
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