Topic: Measurement of surface tension with the test ink method. Dyne test kit. Test inks for surface determination. Contact angle measurement. Goniometer.

Measuring surface tension:
The starting point for plasma pretreatment

Every material surface has a specific surface tension. Every liquid (such as ink) also has an inherent tension. Reliable adhesion with long-term stability of printing, gluing or coating requires that the surface tension of the material is greater than that of the liquid. Plastics, for example, have predominantly low surface tensions (often less than 28 mN/m). If these plastics are to be printed, a surface tension of 40 mN/m for solvent inks or a surface tension of 56 mN/m for UV-curing systems is required. If water-based paint systems are used, the surface tension has to be above 72 mN/m.

For many industrial applications it is crucial that adhesives and/or printing inks and surface properties are optimally aligned. Targeted pretreatment with Openair® atmospheric-pressure plasma achieves a significant increase in surface tension. This gives materials the optimum capabilities for accepting printing ink (wettability) or adhesion.

 Good surface wetting
 Poor surface wetting

To be able to optimally evaluate the process parameters for surface modification with Openair® plasma, the surface tension of the starting material has to be determined first. Even in ongoing processes, it has to be remeasured again and again for quality assurance purposes. The most important methods for surface determination are the test ink method (test inks), contact angle measurement (drop volume method), and dynamic measurement with the Surface Analyst™ goniometer.

Canada
Plasmatreat North America Inc.
1480 Sandhill Dr., Unit 8,
Ancaster, ON L9G 4V5
Canada

Phone: +1 905 304-5200
Fax: +1 905 304-5260

Contact: Mr. Tim Smith
tim.smith@plasmatreat.com


USA
Plasmatreat USA, Inc
2541 Technology Drive, Suite 407
Elgin, IL 60124

Phone: +1 847-783-0622
Fax: +1 847-783-0991

Contact: Mr. Jeff Leighty
jeff.leighty@plasmatreat.com


Plasmatreat USA, Inc
4th State, Inc.
1260 Elmer Street
Belmont, CA 94002

Phone: +1 650 596 1606
Fax: +1 650 596 1180

Contact: Mr. Wally Hansen
wally.hansen@plasmatreat.com

 
 
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Plast Eurasia
26th International Istanbul Plastics Industry Fair

December 7 – 10, 2016
Hall 4, Booth 404B
Istanbul, Turkey

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