Surface Wetting Test Procedure Using Dyne
This procedure describes a method for testing and measuring the
surface wetting tension, i.e., surface energy, of plastic substrates
using dyne test marker pens.
Surface wetting tests should be conducted immediately after
pretreatment (corona discharge, flame treatment, RF gas plasma).
Treated surfaces are time sensitive and are affected by
environmental conditions such as temperature and humidity.
Substrates must have clean surfaces for optimal adhesion. Dirt,
dust, hand/finger oils, silicone based products, and other
contaminates inhibit adhesion and can cause erroneous test results.
CAUTION: Dyne solutions contain Cellosolve (2-ethoxyethanol) and
Formamide which are considered hazardous chemicals. Avoid contact
with skin and eyes. Gloves must be worn at all times. Use with
adequate ventilation. Pregnant women should not perform this test.
Refer to MSDS sheet supplied by the vendor.
||Dyne marker pens -- levels
available 30, 32, 34, 36, 38, 40, 42, 44, 46, 48, 50, 52,
54, 56, 60
||Products to be tested
||Chemwipes or paper towels
||Temperature and humidity gages
||Clean work area
Note: Dyne solutions typically have a 6-12 month shelf life.
Products should be immediately disposed when the solutions appear
green in color. Store in a cool dark area.
||Record ambient temperature
||Select 60 dyne pen, and remove the cap
||Place the product to be tested on a flat
surface. Firmly press the marker pen applicator tip down
onto the product until solution is drawn into the tip
||Using a light touch, draw the pen across
the length of the pretreated surface one time to apply a
thin fluid layer. 2-3 parallel passes are recommended.
Excessive solution will result in misreading
||Note the time it takes for the liquid to
break into droplets. The reading of the liquid behavior
should be observed in the center of the liquid
||If the liquid does not break into
droplets after two (2) seconds, then the surface energy is
assumed to be a minimum of 60 dynes. Proceed to step 2.7. If
the liquid breaks into droplets in less than two (2)
seconds, repeat the test using the next lower dyne marker
pen. Adjustments to the pretreatment process may be
||The test is completed when all surfaces
achieve the desired wetting results
||Properly discard tested products
Notes: Never retest the same location on a sample. Do not touch
or contaminate the surface to be tested. Dyne solutions are also
available in bottle containers, and may be used in conjunction with
a cotton swab test (ASTM D2578-84).
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