HUMISEAL 1B31-S
Harmonization Code : 3403.19 | Lubricating Preparations (With 70% or More Petroleum Oils) For Automotive and Other Uses
Main features
- Rapid Acrylic Film Handling
- UV-Assisted Coating Inspection
- Ambient or Accelerated Cure
Product Description
HumiSeal 1B31S Acrylic Conformal Coating is a fast-drying single-component acrylic conformal coating for moisture and environmental protection of printed circuit assemblies. The liquid has a density of 0.91 +/- 0.02 g/cm^3, 35 +/- 3% solids, and a viscosity of 200 +/- 15 cP. It dries to handle in 10 minutes and is applied at a recommended thickness of 25 to 75 um. The coating cures in 24 hours at room temperature or 30 minutes at 76 deg C, fluoresces under UV for inspection, remains flexible, and can be repaired.
Key features
- Ten-minute dry-to-handle time: The coating reaches the documented handling stage in 10 minutes.
- Flexible UV-inspectable film: The cured acrylic film is flexible and fluoresces under UV for inspection.
- Room-temperature or accelerated cure: The coating cures in 24 hours at room temperature or 30 minutes at 76 deg C.
Applications
- Conformal coating of printed circuit assemblies
- Moisture and environmental protection of electronic assemblies
Technical Specifications
General Properties
Density (g)
0.91 g/cm3
Solids
35 %
Thickness range
0.025-0.075 mm
Physical Properties
Viscosity
200 mPa.s
Viscosity is a measurement of a fluid’s resistance to flow.
Viscosity is commonly measured in centiPoise (cP). One cP is defined as
the viscosity of water and all other viscosities are derived from this base. MPa is another common unit with a 1:1 conversion to cP.
A product like honey would have a much higher viscosity -around 10,000 cPs-
compared to water. As a result, honey would flow much slower out of a tipped glass than
water would.
The viscosity of a material can be decreased with an increase in temperature in
order to better suit an application
VOC
592 grams/liters
Electrical Properties
Breakdown Voltage
7500 V
Breakdown voltage is the minimum voltage necessary to force an insulator to conduct some amount of electricity.
It is the point at which a material ceases to be an insulator and becomes a resistor that conducts electricity at some proportion of the total current.
After dielectric breakdown, the material may or may not behave as an insulator any more because of the molecular structure alteration. The current flow tend to create a localised puncture that totally alters the dielectric properties of the material.
This electrical property is thickness dependent and is the maximum amount of voltage that a dielectric material can withstand before breaking down. The breakdown voltage is calculated by multiplying the dielectric strength of the material times the thickness of the film.
Thermal Properties
Glass Transition Temperature (Tg)
14 °C
The glass transition temperature for organic adhesives is a temperature region where the polymers change from glassy and brittle to soft and rubbery. Increasing the temperature further continues the softening process as the viscosity drops too. Temperatures between the glass transition temperature and below the decomposition point of the adhesive are the best region for bonding.
The glass-transition temperature Tg of a material characterizes the range of temperatures over which this glass transition occurs.
Additional Information
Technical properties
As-supplied / before-processing properties
Typical liquid, handling, and shelf-life data before application.
| Property | Value | Unit | Method / condition |
|---|---|---|---|
| Density | 0.91 +/- 0.02 | g/cm^3 | Typical liquid value |
| Solids content | 35 +/- 3 | % by weight | As supplied |
| Viscosity | 200 +/- 15 | cP | Typical liquid value |
| VOC | 592 | g/L | As supplied |
| Drying time to handle | 10 | min | Fed-Std-141 method 4061 |
| Shelf life at room temperature | 24 | months | From date of manufacture |
Technical properties
After-processing / final-state properties
Typical applied-film and cured-coating properties after the stated cure.
| Property | Value | Unit | Method / condition |
|---|---|---|---|
| Recommended coating thickness | 25 to 75 | um | Applied conformal coating |
| Recommended cure | 24 h at room temperature or 30 min at 76 deg C | - | Cure schedule |
| Time to optimum properties | 7 | days | After application |
| Thermal-shock range | -65 to 125 | deg C | Thermal-shock exposure |
| Glass transition temperature | 14 | deg C | Typical cured coating |
| Inspection aid | UV fluorescence | - | Cured film |
| Flexibility | Flexible | - | Cured film |
| Repairability | Repairable | - | Cured film |
