Viability study of post-consumer recycled plastic for Henkel’s detergent bottles
Tutor / director / evaluatorLis Arias, Manuel José
Document typeBachelor thesis
Rights accessRestricted access - author's decision
This research follows the Henkel’s sustainability goals to increase the percentage of recycled material and presents comparison of the mechanical and chemical properties of different recycled high-density polyethylene and evaluates the potential for the implementation of Henkel’s Laundry Bottles. Our currents bottle is made of polypropylene, which we would change to polyethylene to achieve 35% of recycled plastic in our liquid detergent’s bottles. To be able to proceed with the different tests, the normative ISTA6 has been followed which regulates the packaging that can be delivered by e-commerce. It was found different resin mechanical and aesthetics properties when the resin came from a different type of sorting quality.Besides, we tested and studied the difference between EBM in multilayer and monolayer. On a chemical view, there is no much difference between virgin and the rest of recycled plastic, which means that all the mechanical test values should be at the same range. On the other hand, the current bottle is transparent, which using polyethylene we are going to lose this fundamental characteristic, it would decrease this transparency even some recycled resins would be a bit greyish and opaque, as QCP Grey as a clear example. Consequently, one of our priorities were to find a good recycled resin on a mechanical aspect, but also it was important to fulfill the aesthetics, such as transparency, for example, in order to keep attracting our consumers. Besides the mechanical and aesthetics properties, we also study polyethylene as a reducer of the among of UV-Blocker used in comparison to the actual PP bottle, which is an additive that emit a CO2 to be produced. Although all the resins were good and were above our specification, some critical problems were found preforming drop test above the 3L format’s bottle. Depending how is being sorted, we found some resins, as Ineos Rigidex, which contains a bad odor when is proceed in blow-molded machine. Our purpose is to find a non-greyish resin and maintain a reasonable transparency, technical specification such as mechanical, chemical and aesthetics tests, we could conclude as a recommendation we could use Ineos Rigidex as a preferable resin to implement in our markets.
SubjectsPlastic bottles, Recycling (Waste, etc.), Plastics in packaging, Polyethylene, Ampolles de plàstic, Reciclatge (Residus, etc.) -- Materials, Envasament amb plàstic, Polietilè -- Proves
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