Wüest M. 51 Wykes M. 82 Yamaguchi M. 17 Ybarra G. 129 Yubero F ...
Wüest M. 51 Wykes M. 82 Yamaguchi M. 17 Ybarra G. 129 Yubero F ...
Wüest M. 51 Wykes M. 82 Yamaguchi M. 17 Ybarra G. 129 Yubero F ...
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JUNE 27 TUESDAY MORNING<br />
JS1-TuM-.INV.4 FUNCTIONAL AND DECORATIVE REFLECTING LAYER<br />
FOR AUTOMOTIVE LIGHTING IN VALEO. J. M. Trigo, R. Acuña, A. Lara and D. Teba,<br />
Valeo Iluminación Martos, Calle Linares 15, 23600 Martos, Jaén. Spain.<br />
The possible developments of metallization process for reflectors are restricted looking for the quality<br />
(maintaining process parameters under control to avoid scraps, creating effective hydrophilic layers<br />
to diffuse more an more fogging materials, homogenizing layers thickness) and productivity (reducing<br />
cycle time, simplifying process steps, decreasing costs and so on).<br />
Following the lean process design rules, the trend is to use short dimension machines as Pylonmet<br />
(Leybold TM) having short cycle times for PECVD, employing classical materials, as Al for reflective<br />
layer and silicone matrix starting from the monomer hexamethyl disiloxane as protective topcoat.<br />
This new concept has the advantages of the sputtering system (material long life, good process<br />
control for product quality consistency, better adhesion with higher layer density) and the advantages<br />
of batch metallization (parts movement and unique chamber).<br />
Many efforts are focused to multiply the decorative possibilities of bezels, some of them without reflective<br />
coatings (mass coloured materials where decorated part is obtained directly by injection of<br />
pigmented thermoplastics); some others employ coloured reflective coatings by changing the metal<br />
itself, creating different chemical reactions with the same metal, giving different colours or with coloured<br />
topcoat.<br />
Paint is an usual choice to give decorative effects on bezels because the metallized pigments give us<br />
some shining appealing surfaces. On some cases, competitive costs can be achieved in front of in<br />
chamber metallization process. Less original effects are achieved masking partially part areas resulting<br />
delimited lines between metallized and non metallized where is visible the natural colour of base<br />
plastic.<br />
The interaction of YAG laser (wavelength on near IR) and reflective coatings, bring us new and<br />
original possibilities for decoration purposes, because laser removes the reflecting layer showing all<br />
kind of patterns by contrast with coloured plastic substrate.<br />
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