Heat resistant solder resist ink(For FPC)
TAINEX HRS-1-5W White Alkaline development type
Excels in heat-resistance, flexibility,
and high-reflectiveness
This is an ink dedicated for use with flexible substrates due to its superb durability against bending.
- Feature Flexibility：No crack was detected after continued heating at 125℃for 1000 hours under the bending state (curvature radius R = 0.3).
- Feature High light reflection：Light reflection rate: 70-75%
Feature Flexibility
Continuously heating the inflected product.
-Inflection: curvature radius R=0.3
-Heating: continuous heating at 125 deg. C
Feature High light reflection
Light reflection rate: 70-75%
| Wavelength（nm） | 450 | 550 | 650 |
| Reflection（％） | 73 | 74 | 74 |
-Measure: CM-3600d (by Konica Minolta)
-System: SCI
-Film thickness: 20μm
-Substrate: Cu（FPC ; Pl/Cu=25/18μm）
■Coating film performance
| Item | Test method | HRS-1-5W |
|---|---|---|
| Hardness | JIS K5600-5-4 | H |
| Adhesion | JIS K5600-5-6 | Category 0 |
| Bending resistance | JIS K5600-5-1 180°inflection | OK（R=0.3） |
| Solvent resistance | Isopropyl alcohol, 5Min immersion at room temp. | OK |
| Acetone, 5Min immersion at room temp. | OK | |
| Acid resistance | 10% sulfuric ,30 Min immersion at room temp. | OK |
| Alkaline resistance | 5% sodium hydrate, 5 Min immersion at room temp. | OK |
| Solder resistance | JIS C6481 260 deg.C for 20 Sec. | OK |
| Gold plating resistance | Electroless nickel gold plating process (Ni：3μm、Au：0.05μm) | OK |
| PCT | 121 deg. C for 9 Hr | OK |
| Light reflection rate | Measurement by colorimeter (SCI system) (Measurement range:360～740nm) | 70％ （450nm） |
| Radiation rate | Measurement by heat radiation rate meter (Range: 3～30μm) | 80% |
| Combustibleness | UL94 standard | VTM-0 eq. |
■Electronic characteristics
| Item | Test method | HRS-1-5W |
|---|---|---|
| Insulation resistance | Initial value | 4.3×1010Ω |
| Moisture resistance test based on JIS C5016-9-4,followed by insulation resistance value measurement. | 3.3×1010Ω | |
| Surface resistanse | JIS C6481-5-10 | 1.0×1012Ω |
| Volume resistivity | JIS C6481-5-9 | 1.0×1013Ω・cm |
| Voltage resistance | 500V×1Min energization (Measured film thickness 20μm) | OK |
| Relative permittivity | JIS C6481（1MHz） | 4.1 |
| Dielectric tangent | JIS C6481（1MHz） | 0.04 |
*The results above show reference values, not standard values.
