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Paint systems |
U-nite Fasteners Technology AB has more than 20 years’ experience of painting construction and industrial screws. During this time we have continually developed our technology, painting both with wet paint and powder.
Wet paint
Our wet painting facility has the capacity
to paint 200,000 screws per shift. After
pre-treatment, the screw is painted with
two-component polyurethane paint.
Polyurethane paint is generally characterised
by very good outdoor resistance
and high resistance to mechanical influences.
The paint also offers good colour
resistance, without chalking or fading,
which makes it particularly suitable
for acidic environments. The paint we use
has also been further adapted to cope with
the very tough treatment to which it will be
subjected. The colour system is evaluated
regularly and has proven to satisfy extremely
stringent requirements.
Powder paint
We have used powder paint, primarily on
construction screws, since 1991. In close
collaboration with our powder supplier,
who is a leader in the field in Europe,
we have developed a polyester powder
that gives a very hard-wearing and even
surface layer. Powder paint is free of
solvents, which we consider to be a major
advantage, benefiting both the working
and the external environment. Our powder
facility has the capacity to paint 300,000
fasteners per shift.
Colours
Construction and industrial screws can, in
most cases, be supplied in any colour in
accordance with NCS, RAL or according
to colour tests. Construction metal screws
are stocked in around 15 standard colours.
We also stock paint in about 200 colours,
which can be delivered at short notice
thanks to a very flexible manufacturing
process. Clasp and tin nails are stocked
in some ten colours. Blind rivets, some dimensions
are stocked in up to 15 colours.
Verification/testing
In order to ensure high, even quality in our
paint systems, we take regular samples
from our production process. Samples are
taken from each consignment to check
the resistance of the paint to external
influences/mechanical wear and for colour
checking. Different types of corrosion test
are performed regularly to check colour
systems and surface treatment. Accelerated
corrosion tests, salt spray, humidity
cabinet and SCAB tests are conducted in
co-operation with our paint suppliers, as
well as by independent testing institutes.
We also conduct field tests ourselves.
Alongside our paint suppliers, we are
continually developing our paint systems,
although no changes are implemented
without extremely comprehensive testing.
