Analysis of the Segregation Phenomena of Wood Fiber Reinforced Plastics
Wood–plastic composites (WPC) are enjoying a steady increase in popularity. In addition to the extrusion of decking boards, the material is also used increasingly in injection molding. Depending on the formulation, geometry and process parameters, WPC tends to exhibit irregular filling behavior, sim...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2022-10-01
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| Series: | Journal of Composites Science |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2504-477X/6/10/321 |
| _version_ | 1797472443259944960 |
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| author | Elmar Moritzer Felix Flachmann Maximilian Richters Marcel Neugebauer |
| author_facet | Elmar Moritzer Felix Flachmann Maximilian Richters Marcel Neugebauer |
| author_sort | Elmar Moritzer |
| collection | DOAJ |
| description | Wood–plastic composites (WPC) are enjoying a steady increase in popularity. In addition to the extrusion of decking boards, the material is also used increasingly in injection molding. Depending on the formulation, geometry and process parameters, WPC tends to exhibit irregular filling behavior, similar to the processing of thermosets. In this work, the influence of matrix material and wood fiber content on the flow, mold filling and segregation behavior of WPC is analyzed. For this purpose, investigations were carried out on a flow spiral and a sheet cavity. WPC based on thermoplastic polyurethane (TPU) achieves significantly higher flow path lengths at a wood mass content of 30% than polypropylene (PP)-based WPC. The opposite behavior occurs at higher wood contents due to the different shear thinning behavior. Slightly decreased wood contents could be observed at the beginning of the flow path and greatly increased wood contents at the end of the flow path, compared to the starting material. When using the plate cavity, flow anomalies in the form of free jets occur as a function of the wood content, with TPU exhibiting the more critical behavior. The flow front is frayed, but in contrast to the flow spiral, no significant wood accumulation could be detected due to the shorter flow path lengths. |
| first_indexed | 2024-03-09T20:01:50Z |
| format | Article |
| id | doaj.art-51db2144970f4901b2ad1a24191cd27b |
| institution | Directory Open Access Journal |
| issn | 2504-477X |
| language | English |
| last_indexed | 2024-03-09T20:01:50Z |
| publishDate | 2022-10-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Journal of Composites Science |
| spelling | doaj.art-51db2144970f4901b2ad1a24191cd27b2023-11-24T00:41:25ZengMDPI AGJournal of Composites Science2504-477X2022-10-0161032110.3390/jcs6100321Analysis of the Segregation Phenomena of Wood Fiber Reinforced PlasticsElmar Moritzer0Felix Flachmann1Maximilian Richters2Marcel Neugebauer3Kunststofftechnik Paderborn (KTP), Paderborn University, 33098 Paderborn, GermanyKunststofftechnik Paderborn (KTP), Paderborn University, 33098 Paderborn, GermanyKunststofftechnik Paderborn (KTP), Paderborn University, 33098 Paderborn, GermanyKunststofftechnik Paderborn (KTP), Paderborn University, 33098 Paderborn, GermanyWood–plastic composites (WPC) are enjoying a steady increase in popularity. In addition to the extrusion of decking boards, the material is also used increasingly in injection molding. Depending on the formulation, geometry and process parameters, WPC tends to exhibit irregular filling behavior, similar to the processing of thermosets. In this work, the influence of matrix material and wood fiber content on the flow, mold filling and segregation behavior of WPC is analyzed. For this purpose, investigations were carried out on a flow spiral and a sheet cavity. WPC based on thermoplastic polyurethane (TPU) achieves significantly higher flow path lengths at a wood mass content of 30% than polypropylene (PP)-based WPC. The opposite behavior occurs at higher wood contents due to the different shear thinning behavior. Slightly decreased wood contents could be observed at the beginning of the flow path and greatly increased wood contents at the end of the flow path, compared to the starting material. When using the plate cavity, flow anomalies in the form of free jets occur as a function of the wood content, with TPU exhibiting the more critical behavior. The flow front is frayed, but in contrast to the flow spiral, no significant wood accumulation could be detected due to the shorter flow path lengths.https://www.mdpi.com/2504-477X/6/10/321wood-plastic compositesWPCsegregationfilling behaviorTPUPP |
| spellingShingle | Elmar Moritzer Felix Flachmann Maximilian Richters Marcel Neugebauer Analysis of the Segregation Phenomena of Wood Fiber Reinforced Plastics Journal of Composites Science wood-plastic composites WPC segregation filling behavior TPU PP |
| title | Analysis of the Segregation Phenomena of Wood Fiber Reinforced Plastics |
| title_full | Analysis of the Segregation Phenomena of Wood Fiber Reinforced Plastics |
| title_fullStr | Analysis of the Segregation Phenomena of Wood Fiber Reinforced Plastics |
| title_full_unstemmed | Analysis of the Segregation Phenomena of Wood Fiber Reinforced Plastics |
| title_short | Analysis of the Segregation Phenomena of Wood Fiber Reinforced Plastics |
| title_sort | analysis of the segregation phenomena of wood fiber reinforced plastics |
| topic | wood-plastic composites WPC segregation filling behavior TPU PP |
| url | https://www.mdpi.com/2504-477X/6/10/321 |
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