What is drying
Drying means that applying thermal energy to object such as paints or Inks to volatilize solvent and to cure them. Therefore, regardless of temperature or time, so-called drying can be realized in a short time. In case of using harder agent for 2 component reaction paints, it is important to confirm curing level of harder agent in order to bring out performance of coated surface as well as drying by faster.
【Reference Data】
1. Comparison between existing hot air oven and Hybrid Drying Oven
※Used Paint: 2 component reaction paint which is using production and standard drying condition is 80degree/30min.
① Test Method (※coating on glass plate for taking out only dried paint)
② Result
(1) Judgement whether it is cured by measuring a calorific value by DSC device
Reference DSC value at Standard Drying Condition(Using Hot Air Oven)
*Above value is reference value for judgement
Received Energy Measurement result by Hybrid Drying condition
※「Evaluation Step 1」is evaluated visually.
③ Conclusion
It was specified that complete curing condition is 80℃/30min at conventional Hot Air Oven. However, equivalent results which conventional mass production conditions were obtained under the condition of Irradiation distance 189mm/Irradiation time3min./ output power 80%/atmosphere temperature Consideration of influence of irradiation distance, irradiation time, output power and temperature which obtained from evaluation test.
Influence of Drying condition is 「Output power > Irradiation time > Atmosphere temperature > Irradiation distance」
2. Verification of coating hardening level in case of Hybrid Drying Oven
① Test Method
Based on result of para. 1.Comparision between existing hot air oven and Hybrid Drying Oven, coating hardening level was verified because used paint was 2 component type by trial, *in case of 2 component paint, hardening level of Coating layer for bringing out coating layer performance is also important The degree of cleavage of double bond derived from NCO group was measured using FT-IR
② Result
Comparison of reaction rate between conventional drying and Hybrid drying with same paint
③ Consideration
From the above results of double bond measurement of NCO by FT-IR, it can be understood that Hybrid drying is equivalent to advantage as compared conventional drying.
3. Conclusion
From the results of 1 and 2 on above, Hybrid drying resulted in a clear advantage over conventional drying.
※The above test results are measured values, and the results are not guaranteed.
Comparison between Hybrid Drying Oven and Existing conventional oven
Example of Productivity
