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Stainless Steel
Available types:
- Nanoxid® SLS 100
- Nanoxid® SLS 110
- Nanoxid® SLS Metallic Colors
- Nanoxid® SLS Imitation Etching
General information
Nanoxid®
SLS coatings combine the hardness and clarity of glass with the
advantages of organic coatings (such as easy application). They create
clear, hard and extremely thin layers only 1 to 3 µm thick, leaving the
surface and structure of the underlying metal visible.
Nanoxid® SLS can be delivered in almost any color, in gloss or matte
finishes. Naturally, the user may also mix the desired color from color
concentrates and clear varnish.
Since the layer thicknesses of Nanoxid® SLS are only 1 to 3 µm thick -
as opposed to 5-15µm for PU Systems and 20-30 µm for 2K Systems, cost
savings are produced due to greater surface coverage.
Storage and Handling
Nanoxid®
SLS is a one-component system. It is recommended that the colors be
used within 3 to 6 months of the production date. The colors should be
stored in a cool place and protected from sunlight. Nanoxid® SLS is
flammable. When using it, do not smoke and stay away from open lighting
or other sources of fire, heat or sparks. Do not eat while working with
the material. Read the safety data sheet before handling the material.
The hardened layer is non-toxic. The material is recommended for the
production of layers conforming to the European Norms for the Safety of
Toys, EN 71-3.
Working tools may be cleaned with alcohol or acetone.
Substrates and Use
Nanoxid® SLS was developed for the decoration of stainless steel .
For exterior uses, Nanoxid® SLS colors may only be used under certain
circumstances. The colorfastness typically required for outdoor use is
only partially fulfilled by the organic coloring agents, depending on
layer thickness and type of pigment.
Nanoxid® SLS has passed the normal tests used in the coatings industry (MEK, Cross-Hatch Test, Hardness, etc.)
In order to achieve good adhesion, the metal surface must be free from
all foreign agents, such as oil. In addition, a basic precleaning is
necessary in order to remove possible layers of oil, dirt or
fingerprints, which interfere with adhesion. Therefore, we recommend
cleaning the object immediately before the application of Nanoxid® SLS.
Application
Nanoxid® SLS
colors may be brushed, sprayed or or applied with a roll coater.
Specially developed products are available for special application
methods. Nanoxid® SLS is ready to use and can be applied without
further thinning. Should thinning nonetheless be necessary, a
recommended thinner is available.
Nanoxid® SLS Imitation Etching and Nanoxid® SLS Metallic
Colors must be thoroughly stirred or shaken before use, since they build up a sediment layer when left standing.
Nanoxid® SLS can be used without problems at a relative humidity of up
to 60%. At higher humidity levels, the forming of the layer may be
disturbed. For example, the layer may appear matte. In such a case, it
has been shown to be helpful to warm the article before application of
the coating.
Avoid applying Nanoxid® SLS in thick layers. Otherwise, drips and runs
may result, and too thick layers crack after hardening and may come off.
Hardening
Nanoxid® SLS is
hardend at 150°C - 170°C for about 15-30 minutes. If the temperature is
too low, adhesion problems occur. If the temperature is too hot, color
banding and decomposing of the organic component of the layer result.
This may lead to the layer coming off.
A test run in the oven to be used is recommended, since heat
distribution in ovens is often highly variable. The temperature of the
object therefore often varies from the selected oven temperature.
Heating over 200°C should absolutely be avoided, since this can lead to
decomposing with certain color pigments. Forming of traces of aromatic
amines may be associated with this process.
The layer continues to harden after the thermal hardening. The final hardness is only reached after a few weeks.
Last update: January 2003
:: Product sheet: Aluminium
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