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1) The Research Institute of Industrial Technology: Cutting oil sterilization unit performance test.
The purpose of cutting oil sterilization system is to remove and inactivate microbe, which is a cause of decay of cutting oil. The main cause of deteriorating the capacity of cutting oil is microbe so it is determined that the cutting oil can be used for a long time without replacement if the propagation of microbe is controlled continuously.
 
※ Experiment result
It is found that it has an outstanding sterilization capacity and effect on the removal of bad smell. The microbe growing in cutting oil can be perfectly handled by cutting oil sterilization system and it is effective for removing bad smell, thus, it is expected that it will contribute to the improvement of working environment. Moreover, because cutting oil is continuously used by circulation, it is expected that the sterilization effect will be enlarged by aerating cutting oil.
 
< Sterilization and removal capacity of fungi and decay smell by contact time >
Bacillus type
Before contact
Removal ratio(%)
Contact time
Density of sterilization gas
Remarks
 Colon bacillus
105 CELL
100
 5 sec
0.35 ppm
Microbe
 Influenza virus
105 CELL
100 
 5 sec
0.35 ppm
Microbe
 Mold
106 CELL
100 
 20 min
0.5 mg/l
Bacillus
 Salmonella
107 CELL
100 
 10 sec
0.5 mg/l
Bacillus
 Ammonia NH₃
 
No olfactory detection
 10 min
0.9 mg/l
 Smell of rotten mean
 Sulfureted hydrogen H₂S
 
No olfactory detection 
 5 min
0.9 mg/l
 Cutting oil
 Trimethylamine(CH₃)₃N
 
No olfactory detection 
 7 min
1.2 ppm
Smell of rotten fish
 개전성 hepatitis virus
105 TCD
100 
 10 sec
2.0 ppm
Microbe
 Bacillus cereus
105 TCD
 99.99
 10 min
2.0 ppm
  Spore of bacillus genus
 Aspergillus usami
105 TCD
 99.99
10 min
0.3~0.5 ppm
Filamentous
 Candida paracreus
105 TCD
  99.99
 10 min
0.3~0.5 ppm
Yeast fungus
 
2) National Institute of Environmental Research: Sterilization experiment
Receipt No.
Item
Number of general bacillus(CFU/ml)
Remarks
Min 33
Cutting oil (before treatment)
6.5 X 105
 
Min 33
Cutting oil (after treatment)
Non
Min 33
Painting water (before treatment)
6.5 X 105
Min 33
Painting water (after treatment)
Non
 
1) The Research Institute of Industrial Technology :
Although ozone has a good sterilization and smell removal effect, if the basic property of cutting oil is changed, it may cause another problem. Therefore, in order to check whether the property of cutting oil changes after ozone treatment, the experiment is performed.
 
After pouring 15L of 5% diluted solution to 20L vessels, one vessel is stationed and another vessel is aerated for 24 hours. After that, property changes of cutting oil were compared and analyzed.
   
After aeration using sterilizer, there was no change in capacity and property of cutting oil. It was found that there was no change in property of cutting oil in the results of IR analysis and experiment.
 
Category
정치액
After aeration
External view
Milk-white emulsion
No change
pH
9.6
No change
Number of
alive bacillus
Bacteria
No creation
No change
Fungi
No creation
No change
Density of cutting oil ( Brix % )
5
No change
Density of chlorine ion ( ppm )
12
No change
Capacity of anti-corrosion
(Casting chip
method)
1 hour
No corrosion
No change
2 hour
No corrosion
No change
3 hour
No corrosion
No change
6 hour
No corrosion
No change
12 hour
No corrosion
No change
 
2) Cutting oil manufacture company : B Chemical
It showed good result in comparative experiment that sterilizes undiluted solution of cutting oil and decayed cutting oil with mild oxygen.
 
After pouring 15L of 5% diluted solution to 20L vessels, one vessel is stationed and another vessel is affected by ozone generator for 24 hours. After that, property changes of cutting oil were compared.
 
3) Cutting oil manufacture company : S Oil
If the propagations of fungi and bacteria are suppressed in water-soluble cutting oil, the lifespan of cutting oil increases to the degree that it can be maintained just by adding oil.
 
Base oil : The oil for manufacture of cutting oil
Emulsifying agent : The additive for emulsifying base oil in water
Anticorrosive : The additive for preventing rust
Extreme pressure agent : The additive for endowing the property of extreme pressure.
Anti abrasive agent : The additive for endowing tool with the property of anti-abrasion .
Antifoaming agent : The additive for preventing foam of cutting oil .
Coupling agent : The additive for harmonizing other additives.
Sterilizer The additive for killing bacteria and fungi
Other additives