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      Laser Welding Process in PP Molding Parts: Evaluation of Seam Performance

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      International Polymer Processing

      Carl Hanser Verlag

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          Abstract

          New welding technologies have been implemented in the polymer processing industry in the past few years. Additionally, the most used polymer in complex products is polypropylene. This material can also be mixed with several additives, namely glass fiber, carbon nanotubes, etc. This compatibility with different additives allows products with characteristics that range from impact absorption to electrical conductivity. When it is necessary to join components in PP, they can be welded by hot plate, ultrasonic or laser welding. The present research aims at studying the influence of variables capable of influencing the final quality of the seam, namely those related to injection molding, such as mold temperature and cooling time, laser welding variables and materials, and how laser welding interacts with PP. The results showed that the most influential variables were mold temperature, laser velocity and laser diameter. The seams were analyzed using optical microscopy. They showed perfect contact between the components, despite the high standard variation present in the mechanical tests.

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          Most cited references 18

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          Laser Fundamentals

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            Thermal modelling of laser welding and related processes: a literature review

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              Laser diode transmission welding of polypropylene: Geometrical and microstructure characterisation of weld

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                Author and article information

                Journal
                ipp
                International Polymer Processing
                Carl Hanser Verlag
                0930-777X
                2195-8602
                18 November 2016
                : 31
                : 5
                : 562-569
                Affiliations
                1 Institute for Polymers and Composites, IPC/I3 N, Department of Polymer Engineering, University of Minho, Guimarães, Portugal
                Author notes
                [* ] Correspondence address, Mail address: Antonio Jose Pontes, Institute for Polymers and Composites, IPC/I3 N, Department of Polymer Engineering, University of Minho, 4800-058 Guimarães, Portugal. E-mail: pontes@ 123456dep.uminho.pt
                Article
                IPP3235
                10.3139/217.3235
                © 2016, Carl Hanser Verlag, Munich
                Page count
                References: 18, Pages: 8
                Product
                Self URI (journal page): http://www.hanser-elibrary.com/loi/ipp
                Categories
                Special Issue Contributions

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