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WET LAMINATION
Wet lamination is the commonest lamination technique as it is
easy to use even in positions which are hard to access. However,
the relatively high resin component reduces the strength and
increases the weight.
In wet laminating the resin is applied by means of a short-haired
lambskin roller and forced into the mould by means of appropriate
tools.
- In the first instance the mould receives a thin resin
coating. Just enough resin is applied as is needed to impregnate
half the fabric layer.
- Then the fabric is carefully inserted taking care to
ensure a correct and straight fibre pattern. The lambskin
roller which is still dry is now used to apply pressure.
To prevent slippage the coating movements should always
be parallel to the fibre pattern.
- The resin is now patted into the fibres. If too much
resin is applied the weight will be adversely affected,
as will the strength of the material. This procedure is
repeated as often as necessary until the fabric is fully
impregnated.
- Now the next fabric layer is placed on top. Once again
the correct fibre pattern and prescribed overlap must be
observed.
- Finally a layer of tear-off fabric is applied. This enables
the surplus resin to be pressed out and reduces the weight.
At the same time a uniform surface is obtained and individual
fibres prevented from standing out.
Tempering
The fabric layers with the embedded resin must be held at a
temperature of around 60°C for a specified length of time
to achieve the ultimate strength. This is done in a tempering
furnace. The tempering process should take place in a negative
mould to prevent the occurrence of deformation. It is important
to make sure that the resin has already set completely, otherwise
the parting wax will sweat out when the temperature rises and
a permanent link might be established between the mould and
the workpiece.
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PaucoPlast AG
Talstrasse 14
8852 Altendorf
Fon +41 55 451 11 44
Fax +41 55 451 11 49
info
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