Processing and working instructions HPL and HPL elements PR ...

PRODUCT INFORMATION
In order to achieve good results, please stick to the guideline values of the following table.
It should also be taken into account that these values depend on the working and climate conditions,
as well as the type of core material and the adhesive quality.
guideline values for bonding
Adhesive type
Dispersion adhesives:
PVAc adhesives
2-component
PVAc adhesives
Condensation
resin adhesives:
Urea resin,
melamine/urea resin
Phenolharz,
Resorcinharz
Contact adhesives:
with and without
hardener
Adhesive
application
in g/m 2
90 – 150 on HPL
or core material
90 – 150 on HPL
or core material
90 – 150 on HPL
or core material
100 – 180 on HPL
or core material
150 – 200 on HPL
and core material
Waiting time
(open) 1) in min.
1 - 30
1 – 30 depending
on component
composition
Pressing
pressure
2) 3)
in bar
approx.
3
approx.
3
2 - 20 3 - 5
approx. 2 – 15 3 - 5
Depending on
ambient temperature
and adhesive type
(finger test)
Pressing temperature /
pressing time 4) Proce -
dure
20 °C 40 °C 60 °C
8 - 60
min.
4 - 12
min.
45 - 160
sec.
According to manufacturer’s
specifications
15 –
180 min.
5 – 30
min.
1 – 12
min.
Depending on hardener system
approx.
8 hrs.
Pressing time
depending on
hardener system
At least 5 At least 1 min. pressed c)
with added hardener These are special adhesive settings for which no general guideline values can be specified.
Reaction adhesives:
Epoxy, unsaturated
polyester and polyurethane
adhesives
Hot-melt adhesives
100 – 250 on HPL
or core material
180 – 300
180 – 300 on HPL
or core material
Depending on type
Extremely short
Stack
pressure,
store flat
Pressure
roller
Depending on type and hardener
system
195 – 220 °C
(adhesive application temperature)
1) According to DIN 16920, the waiting time (open) = the time between application of the adhesive and placing the surfaces
together for bonding. To this is added the waiting time (closed) = the time between placing the adhesive surfaces together
and achievement of the full pressing pressure or other measures causing bonding (hardening) (e.g. the hardening tempera-
ture). When bonding in the heating press, the full pressure must be applied immediately after loading the press, in order to
prevent distortion of the composite elements or premature drying of the adhesive coating.
2) 1 bar ≈ 1 kp/cm 2 = 0,1 N/mm 2 ≈ 100 k Pa
3) calculate the pressing pressure for hydraulic presses, see the Appendix (Item 8)
4) The pressing time is not always identical to the time until reaching final strength. Depending on the procedure, an adequate
time interval must be left after pressing before further processing.
099 PI Processing and working instructions Page 20 of 34
a)
a)
b)
b)
d)
e)