HumiSeal® 1A33 LTX is a single component, polyurethane conformal coating, suitable for general printed circuit board applications. It is especially formulated with reduced xylene and toluene concentration to be fully compliant with GB30981-2020*. HumiSeal® 1A33 LTX is also produced as pre-blended products, at a range of viscosities, suitable for a variety of applications with no further dilution required. HumiSeal® 1A33 LTX, and its Pre-blend Products, contain no free isocyanates and fluoresce under UV light for inspection purposes. HumiSeal® 1A33 LTX coating is MIL-I-46058C qualified, IPC-CC-830 and RoHS Directive 2011/65/EU compliant and recognized under UL File Number E105698. *Standard GB30981-2020 defines limits on VOCs and solvent usage for Conformal Coatings. Standard GB/T 23990-200 defines the test method for Solvent % analysis.
Humiseal 1A33 LTX has the following advantages:
• Protection against moisture, salt / corrosive environments and dirt
• Easy application with automated systems • Low moisture vapor permeability.
• Fluoresces under UV for ease of inspection and is easily repaired.
• Range of pre-blends thinners available for different application methods • Compliant with GB30981-2020
Product Specification |
|
| Recommended Coating Thickness | 25 – 75 microns |
| Drying Time to Handle per Fed-Std-141, Meth. 4061 | 15 minutes |
| Optional Curing Conditions to Reach Optimum Properties | 30 days @ RT
30 hours @ 76°C 20 hours @ 88°C |
| Recommended Stripper | HumiSeal® Stripper 1063 |
| Thermal Shock, 50 cycles per MIL-I-46058C | -65°C to 125°C |
| Coefficient of Thermal Expansion – TMA | 193 ppm/°C |
| Glass Transition Temperature – DSC | 26°C |
| Modulus – DMA | 27.2 MPa |
| Flammability, per UL 94 | V-0 |
| Dielectric Withstand Voltage, per MIL-I-46058C | >1500 volts |
| Dielectric Breakdown Voltage, per ASTM D149 | 7500 volts |
| Dielectric Constant, at 1MHz and 25°C per ASTM D150-98 | 3.6 |
| Dissipation Factor, at 1MHz and 25°C, per ASTM D150-98 | 0.03 |
| Insulation Resistance, per MIL-I-46058C | 2.0 x 1014 ohms (200TΩ) |
| Moisture Insulation Resistance, per MIL-I-46058C | 1.6 x 1010 ohms (16GΩ) |
| Fungus Resistance, per ASTM G21 | Passes |
