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Surface treatment of glass

The surface treatment of glass with plasma technology has been established in practice for many years. Without pre-treatment glass has a typical surface energy of 47mN/m. After plasma treatment, the surface energy increases significantly. Treatment with the high-power plasma system plasmabrush PB3 achieves a surface energy of >72mN/m and with the handheld plasma unit piezobrush PZ2 a surface energy of >67mN/n. Test inks according to DIN ISO 8296 were used for the test.

Application example: bonding glass

A typical application example is bonding glass. The following table shows the improvement of the average adhesive strength after plasma treatment compared to untreated glass substrates.

SubstrateAdhesiveTreatmentAverage
adhesive
strength

SD*

Gain
Glass

Epoxy glue

none1,46 N/mm²0,43
GlassEpoxy gluepiezobrush5,43 N/mm²0,37>3,7 times
GlassAll-purpose
adhesive
none2,80 N/mm²0,62
GlassAll-purpose
adhesive
piezobrush3,85N/mm²0,49>1,3 times
GlassWindscreen
adhesive (PU)
none0,23 N/mm²0,02
GlassWindscreen
adhesive (PU)
piezobrush0,85 N/mm²0,04>3,5 times

*Standard deviation

Glass

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