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Analysis of Mechanical Properties Related to Fiber Length of Closed-Loop-Recycled Offcuts of a Thermoplastic Fiber Composites (Organo Sheets)

  • Increasing demand for energy-efficient means of transport has steadily intensified the trend towards lightweight components. Thermoplastic glass fiber composites (organo sheets) play a major role in the production of functional automotive components. Organo sheets are cut, shaped and functionalized by injection molding to produce hybrid components, such as those used in car door modules. The cutting process produces a considerable amount of production waste, which has thus far been thermally recycled. This study develops a closed mechanical recycling process and analyzes the different steps of the process. The offcuts were shredded using two shredding methods and implemented directly in the injection-molding process. Using tensile tests and impact bending tests, the material properties of the recycled materials were compared with the virgin material. In addition, fiber length degradation via the injection-molding process and the influence of the waterjet-cutting process on the mechanical properties are investigated. Recycled offcuts are both comparable to new material in terms of mechanical properties and usability, and are also economically and ecologically advantageous. Recycling polypropylene waste with glass fiber reinforcement in a closed loop is an effective way to reduce industrial waste in a sustainable and economical production process.

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Author:Sabine Hummel, Katharina Obermeier, Katja Zier, Sandra KrommesORCiD, Michael Schemme, Peter Karlinger
URL:https://doi.org/10.3390/ma15113872
Parent Title (English):Materials
Document Type:Article (peer reviewed)
Language:English
Publication Year:2022
Tag:characterization; degradation; emissions; fiber composites; manufacturing process; recycling; renewable materials; resource efficiency; sustainability
Volume:15
Issue:11
First Page:3872
Peer reviewed:Ja
Project Title:Prozessentwicklung zum Recycling von Organoblech-Verschnitten mit direkter Implementierung in den Hybridbauteil-Fertigungsprozess mit zusätzlicher Bewertung
Acronym:ReProOrgano
Funding Agency:BMBF
Grant Number:13FH007PX8
faculties / departments:Fakultät für Ingenieurwissenschaften
Fakultät für Wirtschaftsingenieurwesen
Dewey Decimal Classification:6 Technik, Medizin, angewandte Wissenschaften / 62 Ingenieurwissenschaften / 620 Ingenieurwissenschaften und zugeordnete Tätigkeiten