Heat resistant solder resist ink(For RPC) TAINEX HRS-1-7W White
- Feature High heat resistance：The high heat resistance property is achieved with a silicone resin. Almost no reflectance deterioration was detected under the condition of 150℃ for 1000 hours.
- Feature Superb UV resistance：The HRS-1-7W is resistant to ultraviolet radiation and almost no deterioration has been noted even when exposed to UV-C irradiation.
- Feature Countermeasure against low-molecular siloxane：Even though HRS-1-7W is consisted of silicone resin,there is no detection of low-molecular siloxane, which may cause electrical contact failure.※1
Feature High heat resistance
The reflectance deterioration rate after heating the product at 260℃ for 3 cycles was as low as 2%. There was almost no change compared to the initial condition.
|After 260 deg.C ×10 minutes 3 cycles||94.23||-1.41||0.89||89.00|
|After 320 deg.C ×2 minutes||94.37||-1.35||0.54||89.80|
Feature Superb UV resistance
UV-C Irradiation test (HRS-1-7W, General solder resist ink)
With resistor inks that are based on organic resins including epoxy resin, their luster is deteriorated by UV-C. With HRS-1-7W, however, it is free from any deterioration in luster.
|After UV-C irradiation for 1000 hours||42.0||89.09||500V OK|
HRS-1-7W is free from any insulation breakdown at 500 V even after it has been exposed to UV-C irradiation for 1000 hours.
Feature Countermeasure against low-molecular siloxane※1
Amount of low molecular siloxane in the ink (D4-D10)
Types of cyclic
HRS-1-7W is a solder resistor ink consisting of a silicone resin which features high light reflectivity due to its white color and superb heat resistance.
Measurement was performed at
Kita-Kanto Analysis Center,
Measurement method: measurement tool:
gas chromatograph (GC/FID)
■Coating film performance
HRS primer +HRS-1-7W
|Hardness||JIS K5600-5-4||2H or more||2H or more|
|Adhesion||JIS K5600-5-6||Category 0||Category 0|
|Solvent resistance||Isopropyl alcohol, 5Min immersion||OK||OK|
|Acid resistance||10% sulfuric ,30 Min immersion at room temp.||OK||OK|
|Alkaline resistance||5% sodium hydrate, 5 Min immersion||OK||OK|
|Solder resistance||JIS C6481 260 deg.C for 20 sec.||OK||OK|
|PCT||121 deg. C for 9 Hr||OK||OK|
HRS primer +HRS-1-7W
|Insulation resistance||Initial value||
24V load, 85 deg. C,
|Surface resistanse||JIS C6481-5-10||1.0×1011Ω||1.0×1012Ω|
|Volume resistivity||JIS C6481-5-9||1.0×1013Ω||1.0×1013Ω･cm|
*The results above show reference values, not standard values.