Molding Sinopec PP K8009: Barrel & Mold Temp

Technical Jul 28, 2026 By Bepa Zhu

Sinopec PP K8009 is a medium-impact block copolymer developed for injection-molded parts, including automotive components. Its rubber-rich phase gives toughness while the homopolymer matrix keeps stiffness and cycle speed reasonable.

Barrel temperature sets how fully and evenly the melt forms. Too low and the part fills poorly or shows weld lines; too high and degradation and flash risk rise. A graduated profile from feed to nozzle is the usual approach.

Mold temperature controls skin cooling and crystallinity. A warmer mold improves surface replication and relieves internal stress, while a cooler mold shortens cycle time at some cost to appearance and warpage.