The effect of technological parameters on the foaming of injection molded, recycled PET

Abstract

The foaming of regranulate made from recycled PET bottles was examined, varying two important technological parameters: holding pressure, and the amount of material injected into the mould cavity, which was controlled with the switchover point. It was shown with optical and density tests that these parameters have a significant effect on the foam structure, which greatly influences mechanical properties.

The effect of mold temperature on chemical foaming of injection molded recycled polyethylene-terephthalate

“…The injection molded samples had car door handle geometry (developed in previous research [25]), 8x15 mm rounded cross-section, and are favorable for foam injection molding. The moldings were cut for 3 parts (Fig.…”

Recycling of Mineral Water Bottles with Chemical Foaming

“…Chain extensions to the base material are added in addition to the chemical foaming agent. This process connects chains and improves mechanical properties and increases viscosity [8] (Fig. 2).…”

“…One of the most productive processing technologies is injection moulding; this process typically produces thin-walled products ranging from a few millimetres to several meters in length [8].…”