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Electron Beam Curing of lacquers on
boards, doors, panels and parquet
Today the consumer is searching for surfaces with the
resistance and the durability of synthetic materials, but he doesn’t want to lose the
warmth and the homeliness, which lacquers are transmitting at the same time.
For this the EBC (Electron-Beam-Curing) presents lacquered surfaces
highly crosslinked, which can’t be reached economical with any other lacquering
technology.
Why EBC ?
Additional to the above important arguments for the EBC-drying there
are some essential advantages of this economical curing method to the fore:
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Solvent free, 100 %-system, curing
through polymerisation |
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High scuff resistant coatings |
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Controlled and calculable through-curing |
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Immediately stacking or subsequent
treatment of the materials |
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High throughput, essential increasing of
the production speed in comparison to the thermal drying method |
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Constant product quality, precisely
maintain of crosslinking and vulcanising process through dose precision over working
width, in the depth of material and also in production time |
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Essential modest extraction values in
comparison to UV-curing, processing without sensitises |
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Modest energy consumption, minimal
temperature increase through radiation process |
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No change of moisture level in the
substrate |
EBC is successful in the industrial practice of surface converting
for a variety of substrates, e.g:
Lacquer material
The EBC curable layers, consists of 100 % systems on acrylate base.
With corresponding pigmentations of differently colours and with particularity
considerations all matting levels and also structures in the surface can be reached.
All available systems like roller coating, curtain, vacuumat
application, dip and drain coating, spray coating can be used as application technologies.
EB-lacquers have a very low steam pressure, therefore the
application with increased temperatures of the coating material and / or the substrate is
possible. Also there is no drying of the lacquers in the application systems. An
ex-protection is inapplicable.
The cured layers gives the feeling o lacquers with its own warmth
and homeliness. Also they are resistant to scratches, nicks, acetone, ethanol, water,
acids, fat, coffee, wind and weather.
EBC board plants are easy in construction; for the operation there
is no additional personnel necessary. The plants are running independent SPS-controlled
and screen supervised. Because high voltage (penetration depth of electrons) and electron
beam (dose / throughput of material) are measurable and calculable values, everytime and
for every product a quality with EBC is possible.
Fig. 1 Typical layout of curing station
Drying process
On a conveyor (see the following drawing) the coated boards are
coming to the x-ray shielding. They will be transported to a second level to avoid x-ray
emission.
Than they come to the inertisation- and curing zone with accelerate
electrons. Through polymerisation the liquid coating the liquid coating material will be
changed into a hard layer, with previous described qualities, in parts of a second. The
board with a cured layer leaves the curing zone and reaches the working level inside the
lead shielding and can be controlled, packaged, spreaded further or turned for coating the
back side immediately.
EBC is economical
After fixing the requests of the coating, the layer thickness
(acceleration voltage) and the planned throughput of the material (electron flow) will be
well suited to each other. The economical area for plants is, according to the increase in
value of the converting process, between 0,5 and 5 Mio. m2.
Extensive cost analysis shoes, that in consideration to the whole
coating process, with sanding, basecoating, intermediate sanding and even a multilayer
coating with UV-intermediate gelling and EBC-end through curing, approx. 70 % of the
coating costs are caused due to the lacquer. The rest of 30 % is spreaded in energy,
inertgas, service, articles of consumption like sanding paper, and also capital and
deprecation costs.
According to the lacquer costs, realistic m2-costs, at a total coating weight
of 150 g/m2 are in
the area of 2,60 DM/m2.
Performance for Electron Crosslinking AB Accelerators
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Acceleration voltage 80 - 300 kV |
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Electron flow per cathode max. 200 mA |
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Working width 200 - 2000 mm |
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Electron flow per cm window length max:
3,2 mA/cm |
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Speed of web at 10 kGy up to 800 m/min |
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Distribution of dosage over working width
better ± 5 % |
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Productive penetration depth of electrons
max. 390 g/m2 -incl.
metals also- |
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No cooling of electron exit window
necessary. |
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The radiator may be installed in any
position whatsoever. |
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No measurable X-radiation outside
protective screen. |
Dicussions of process or principle trials direct to the
developer and manufacturer of electron radiation systems:
Click here to view this
brochure in PDF-format, English (142 KB).
Click here to view this
brochure in PDF-format, German (192 KB).
For More Information Contact:
ELECTRON CROSSLINKING AB
Skyttevägen 42
SE-302 44 Halmstad
Sweden
Tel: +46 (0)35 15 71 30
FAX: +46 (0)35 14 82 06
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