Enhanced TDS
Knowde-enriched technical product data sheet
Identification & Functionality
- Product Type
- Technologies
- Product Families
Features & Benefits
- Ready-to-Use Product Features
- Superiority
- In the UV-C band region (250 to 280 nm), about twice as high reflectance as
aluminum substrate (UV479: 95.6% / Aluminum substrate : 49.3%) - High durability allows operation even at high output
- Our products enable customers to apply for complexity in shape.
- In the UV-C band region (250 to 280 nm), about twice as high reflectance as
Applications & Uses
- Markets
- Applications
- Application Method
- Cure Method
- Plastics & Elastomers End Uses
- Applications
- LED COB UV reflection coat
- Medical equipment, home appliance with UV sterilization unit
- Air cleaner with UV sterilization unit
- Typical Use
- Highly reflective COB / SMD substrate
- Higher output of UV sterilization / disinfection equipment
Properties
- Color
- Typical Properties
Value Units Test Method / Conditions Adhesives Al / SUS - - Breakdown Voltage (Thickness 47μm on Al) 3.2 KV 10sec / Electrode distance 20mm Coating Method Screen printing - - Coating Method Spray - - Insulation Resistance (Thickness 47μm on Al) 1.7×10^9 Ω 500V / 10sec / Electrode distance 20mm Reflection (at 265nm, Thickness 30μm or more) min. 90 % Reflectance is relative comparison with Spectralon® (Porous PTFE) Viscosity (at 10 rpm, Screen printing) 10 - 70 Pa.s Viscosity can be adjusted by the customer coating conditions. Viscosity (at 10 rpm, Spray) 10 - 30 Pa.s Viscosity can be adjusted by the customer coating conditions.
Technical Details & Test Data
- Technical Information
- UV sterilization is expected as the valuable technology to disinfect bacterial, virus thereat around us.
- High efficient reflection coating for UV wavelength 250～400nm.
- Thermal curing ink (main + agent) for screen printing, also we can provide printing service too.
- Reflection UV479 : min. 90% @265nm
- Endurance:
Thermal R change within <5% at 200℃/2000hours
High temp & humidity R change within <5% at 60℃-90%/2000hours
UV resistance R change within <5% at 26mW/cm2, 270nm/2000hours
Reflectance
Thickness Dependence
Substrate Dependence
- Comparison of Reflection Characteristics in UV-C Area
- UV Durability Test Result
- Durability Evaluation Example
Test item Test condition Result Heat resistance
test200°C
×1,000 hoursNo decrease in
reflectance
more than 5%Constant
temperature and
humidity test60°C/90%
×1,000 hoursCycle test 25°C↔260°C
10 cyclesNo peeling or
discoloration- Mixing and Curing Conditions
Mixing
ratioMaterial Concentration Main material (UV479) 100wt% Curing material (OG840) 2.0wt% Note: Adjust the viscosity with diluent if necessary.
Curing Process Apparatus Temperature Retention time Drying Box oven / Belt dryer 90°C 10 min. Curing 180°C 180 min. Note: The dryer should be well ventilated.
Make sure that the surface is sufficiently dry
when you touch it with your finger.
Please cure until you feel it.- High Temperature Resistance
Holding Temperature : 200°C
- Weatherability
Holding Condition : 60°C 90%RH
- UV-C resistance
Irradiation Condition: 26mW/cm2@270nm
- Adhesive
- Cross Cut Test before and after Thermal shock test
- Thermal shock test condition : 260°C→25°C water × 10times
UV479
before/afterAl 0/0 Cu SUS 0/0 
- Recommended Blending Conditions
Blending condition
Blend Ratio
- Main Body : UV479 = 100 wt%
- Curing Agent OG840 for UV479 = 2.0 wt%
- Pick Main Body up from the refrigerator
- And Keep it in the room and store until main body up to room temperature (>6 Hours) as unopened (Avoid Dew condensation)
- Curing Agent solution should NOT be in the refrigerator.
Thinner
- In case it need to adjust viscosity
Storage condition
- Main Body : OG461, UV478, UV479) = 5°C (Refrigerated storage below 5°C)
Shelf Life: 3 Months after manufacturing - Curing Agent : OG830, OG831, OG840 = Room Temperature
Shelf Life : 6 Months after manufacturing
- Recommended Curing Conditions
Drying Condition
- 90°C for 10 min in the Box Oven or Equivalent Heat amount of Belt dryer
Curing Condition
- UV479 : 180°C for 120~180 min(minimum) in the Box Oven or Equivalent Heat amount of Belt dryer
- Feel dry surface by the finger touch is good enough in the above condition