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23. February 2017

Joining metal and textiles without adhesives

LZH | Today, metal-textile hybrid materials are being used in many different areas. At the moment, however, these materials are relatively expensive and not always available in a sufficient quantity. In order to optimize metal-textile hybrid materials for widespread industrial use, the LZH is currently working on an adhesive-free process.

The textile part to be joined is a thermoplastic, nonwoven fabric with polyester fibers with a low melting temperature. First, a solid-state laser roughens the surface of the metal sheet. Then the metal sheet is heated and joined to the textile material. The thermal energy melts the polyester fibers, allowing for a hybrid connection between the metal and the textile.

This joint provides a much higher adhesive strength than conventional bonding using adhesives. However, the process is currently still in the trial stage. Ultimately, the project partners plan on structuring the sheet metal directly from the coil using the laser.

by Marius Lammers and Silke Kramprich

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Benefits derived from research results

  • The importance of metal-textile hybrid materials is increasing
  • Use in automobile construction for acoustic and heat insulation
  • Previous manufacturing processes with adhesives are still insufficient
  • The LZH and its partners are developing a joining process without adhesives
  • Laser-structured metal surfaces for better bonding
  • Higher adhesive strength, lower costs and lower weight
LZH_Metall-Textil-Hybridwerkstoffe_Bild1_01
A solid-state laser structures the aluminum surface for a better adhesion to the nonwoven fabric. (Photo: LZH)
LZH_Metall-Textil-Hybridwerkstoffe_Bild2_01
The roughened aluminum surface is clearly visible in an SEM-image. (Photo: LZH)
LZH_Metall-Textil-Hybridwerkstoffe_Bild3_EN
In the future, metal-textile composites shall be produced directly from the coil. (Grafik: STFI. Projekt MeTexCom2, IGF-Vorhabennr. 157 RBG)
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Melanie Gauch

+49 (0)511 2788 419

m.gauch@lzh.de

www.lzh.de

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