Abstract
The aim of this paper is to investigate the optical properties of the recycled polymer during numerous internal reprocess using experimental design. The process conditions (material temperature, mold temperature, injection rate) and recycling on the gloss and colorimetric properties of polypropylene containing 2 wt% of pigment was studied. Several injection parameters and cycles numbers must be tested. One most limit for this kind of study is the large number of experiments that requires longtime and significant investments. The idea is to vary three injection parameters (Temperature of material, Temperature of the mold, injection rate) for five injection cycles using statistical approach. The three variables (materiel temperature, mold temperature and injection flow) were investigated at three industrial used levels. The number of recycling varies from cycle 0 to cycle 4 at five levels. The complete matrix for screening was designed using D-optimal quadratic design. The experimental design was generated with the statistical software MODDE 10.1-Umetrics. A set of 45 experiments was carried out to determine the influence of injection parameters and recycling on the appearance properties of samples. The statistical software package Nemrodw® version 2007, LPRAI (Marseille, France) was used to analyze the experimental design.
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Baccouch, Z. et al. (2020). Investigation on the Effects of Recycling and Injection Parameters on Gloss Properties of Smooth Polypropylene Parts. In: Chaari, F., et al. Advances in Materials, Mechanics and Manufacturing. Lecture Notes in Mechanical Engineering. Springer, Cham. https://doi.org/10.1007/978-3-030-24247-3_25
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DOI: https://doi.org/10.1007/978-3-030-24247-3_25
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