Co-injection filling characterization of the polypropylen packaging by 3-D simulation.

Yalçın, Bekir; Yılmaz, Ahmet; Gök, Zübeyir

Polypropylene (PP) is a crystalline thermoplastic widely used in many industrial applications such as medical devices, automotive parts, battery cases, household products, or packaging trays due to its high chemical resistance, processability and impact/stiffness balance, well barrier property, lightness and toughness respectively. However, researchers and engineers have focused on new injection methods to reduce the cost of products and production time. After doing a literature survey about the new injection methods in this study, the co-injection simulation conducted with the Moldex 3-D program using properties of both virgin PP and scrap PP. By the way, the effect of co-injection parameters such as injection pressure, closing force, mod and melt temperatures on co-injection filling characterization investigated. As a result that when the core temperature of the first injected virgin PP is higher than its nucleation temperature, the core of the wall goes on the wall with the second injection of scrap PP until cooling of nucleation temperature. End of co-injection, the second injected scrap PP after first injected virgin PP replaced the advancing virgin PP on the wall core, and a three-layered wall consisting of original PP, scrap PP, original PP obtained.

POLYPROPYLENE; STIFFNESS (Mechanics); HOME furnishings; TEMPERATURE; THERMAL properties

Nigde Omer Halisdemir University Journal of Engineering Sciences / Niğde Ömer Halisdemir Üniversitesi Mühendislik Bilimleri Dergisi, 2022, Vol 11, Issue 3, p806

2564-6605

Academic Journal

10.28948/ngumuh.1083285