Page 4 - Surface Energy Testing

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Metering Rod Selection Chart
Thickness
(1)
Coverage Wet Film
Weight
(2)
Rod
#
Microns
m
2
/l
g/m
2
1
3.8
263
3.8
3
7.6
131
7.6
4
10.2
98.4
10.2
5
12.7
78.7
12.7
6
15.2
65.6
15.2
7
17.8
56.4
17.8
8
20.3
49.2
20.3
9
22.9
43.7
22.9
10
25.4
39.4
25.4
12
30.5
32.8
30.5
15
38.1
26.3
38.1
18
45.7
21.9
45.7
22
55.9
17.9
55.9
24
60.3
16.1
60.3
30
76.2
13.1
76.2
36
91.4
10.9
91.4
42
107
9.2
107
50
127
7.9
127
80
200
4.9
203
100
254
3.9
254
(1)
1 mm = 1000 microns. Thickness varies
somewhat, notably for high viscosity
liquids and small wire rods.
(2)
g/m
2
assumes 1 g/cm
3
“DyneX” Drawdown Platform
Full width magnetic clamp allows precise sample positioning with secure grip.
12.7mm thick foat glass platform large enough for direct A to B comparisons
or evaluation of machine caused treatment variations. 305mm x 305mm
smoothing pad with closely controlled compressibility is engineered to promote
uniform fuid distribution with minimal squirm. Each unit is meticulously
inspected to assure fatness. Ideal for use with “DyneX” applicators. Five
pre-adjusted shock absorbing levelling feet and surface mounted spirit level
ensure precise levelling and frm footing. Liquid crystal thermometer is accurate
to better than 1°C.
“DyneX” Metering Rods
Applies a highly uniform wet flm coating.These wire-wound metering rods,
when used on a precision surface such as the “DyneX” Drawdown Platform,
will apply a highly uniform wet flm thickness, which is ideal for Dyne testing.
These rods, widely known as Mayer Rods or drawdown bars are fabricated
from 303 stainless steel; the wire winding is 304 stainless steel. The 400mm
long rod has 305mm of wire wound on centre. Rods are available in 6.3mm
and 12.7mm diameters.
These lab rods can be used either to test two coatings simultaneously, or for
full width substrate evaluations using one test liquid. Economical and easy to
use; simple clean-up with water, alcohol, appropriate solvent and low lint cloths.
With the use of such non-abrasive cleaners, metering rods can be repeatedly
reused.
“DyneX” Applicator
With a Tefon® coated surface it is ideal for Dyne testing – no attraction to, or
contamination from the applicator affects test results. Remarkably fast and
easy clean-up saves time and cleaning supplies.
The “DyneX” applicator measures only 13 x 13 x 64mm. A precision ground
gate, 38mm wide, is centered on each of the four edges. This restricted
passage channels the fow of the Dyne fuid through the gate whilst limiting the
wet flm thickness applied to a maximum of only 12.5 microns.
This tool can produce high quality drawdowns in a confned area, making
direct benchtop testing a reality. For best results, we strongly suggest use on
a “DyneX” drawdown platform. All four gates are precision ground to the same
clearance to facilitate quicker test-to-test turnaround, and to provide the longest
service life. Packed in a cushioned protective container.
To perform the Dyne test with a “DyneX” applicator, frst apply a short bead of
surface tension test fuid from a dropper bottle directly to the sample surface.
As soon as possible, the applicator is then drawn down over this bead,
spreading it over the surface. Determination of Dyne level by wetting is
then performed to a standardised test procedure.
.
Newton House, 5 Parkside Court, Greenhough Road,
Lichfeld, Staffordshire, WS13 7FE, United Kingdom
+44 (0) 1543 411 460
+44 (0) 1543 415 140
Phone:
Fax:
info@dynetechnology.co.uk
www.dynetechnology.co.uk
E-mail:
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