|Performance of the UV Ozone treatment on the surface of some polymaer|
|Conditions : Test equipment: UV/Ozone Surface processor(SSP16-110)
Gap between an lamp and the work : 30mm
UV irradiance : 15.9mW/cm2 (254nm)
|Fig.Change of the surface energy by UV/Ozone Surface Treatment|
|Table. Ranking of surface energy dyne level concerning to the adhesion|
|Ranking of feasibility||Surface tension
|Performance of the adhesion|
|Failure level||<38||Surface tension level is too low to achieve a practical adhesion force.|
|Practical but uncertain level||39-50||Dyne level which can achieve practical adhesion force.
However, it is not a safe level; it may lead to lack of adhesion force due to effects of storage conditions after surface treatment or other inappropriate handling.
|Excellen level||54-72||This level enables maintaining adhesiveness during stroage for as long as several weeks and can avoid effects by uncertainness of measurements of surface tension.|
|Excessive or unknown level||>72||Caution! not to overdose the modification of the surface, or the surface
energy of a substrate and glue will be reversed.
This leads to get worse the surface adhesiveness again.
|Angle of a water drop & Surface tension||72||This dyne value is equal with 0 degree contact angle of water drop on a hyper clean glass. It shows the status where molecular layer of organic contamination became thinner and a part of substratum of glass started to be exposed.|
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