UV Curable UV 40
Model No: UV40
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HumiSeal® UV40 is a single component, high solids, UV curable, acrylated polyurethane conformal coating that possesses excellent chemical resistance, surface hardness, flexibility and moisture resistance. The material is tack-free after exposure to UV light. A secondary moisture cure mechanism will cure unexposed areas of the coating within 2-3 days at ambient conditions. The coating fluorescence under UV light to allow for coating inspection and can be applied by selective coating equipment. UV-40 curable conformal coating is a single layer coating that is specifically designed for maximum level of protection of PCB’s. It is a thin film that is ensured on the topology of the circuit board and protects it from harsh chemical and mechanical environments.

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Meaning of UV Curable Conformal Coating

UV curing is a process in which UV light is used to start a photochemical reaction that generates a microscopic cross linked network of acrylated polyurethane. UV Curable Conformal coatings can be successfully applied to substrates that have been cleaned prior to coating and also to substrates assembled with low residue, “no clean” assembly materials. Users should perform adequate testing to confirm compatibility between the conformal coating and their particular assembly materials, process conditions and cleanliness level.

How UV Curable Conformal Coating is done

UV curable conformal coating is done by spaying the UV resin on the PCB using traditional spraying equipment. This provides extremely fast curing for a period of time with maximum production speed. This resin gets completely solidified within seconds of application on any surface. This causes a minimal effect on the environment. It comes with a super adhesive solid material that is non reactive to solder.

It provides resistance to a wide range of chemical solvents, moisture, and inductance which are major potential contaminants of a PCB. UV curing of a circuit board makes it flexible to a wide range of temperature. The cured film has a high degree of environmental and chemical resistance and will be more difficult to remove than traditional conformal coatings.

HumiSeal® UV40 conformal coating is:

  • single component
  • high solids
  • UV curable
  • acrylated polyurethane

 

HumiSeal® UV40 conformal coating has:

  • excellent chemical resistance, surface hardness, flexibility and moisture resistance.
  • secondary moisture cure mechanism for curing in the non-UV exposed shadowed areas
  • fluorescence under UV light to allow for coating inspection
  • can be applied by selective coating equipment.
  • recognized under UL File Number E105698
  • MIL-I-46058C qualified
  • IPC-CC-830 and RoHS Directive 2015/863/EU compliant

 

Application of HumiSeal® UV40 Conformal Coating

Conformal coatings can be successfully applied to substrates that have been cleaned prior to coating and also to substrates assembled with low residue, “no clean” assembly materials. Users should perform adequate testing to confirm compatibility between the conformal coating and their particular assembly materials, process conditions and cleanliness level. 

Specification:

Product Specification

Density

1.10 ± 0.05 g/cm3

Minimum Solids Content

95 %

Viscosity, per Fed-Std-141, Meth. 4287

650 ± 150 centipoise

Recommended Coating Thickness

25 – 125 microns

Recommended UV Cure*

SeeTDS for Details

Shelf Life at Room Temperature, DOM

12 months

Recommended Stripper**

HumiSeal® Stripper 1100

Thermal Shock, 50 cycles per MIL-I-46058C

-65°C to 125°C

Glass Transition Temperature – DSC

45°C

Coefficient of Thermal Expansion – TMA

85 ppm/°C Below Tg
197 ppm/°C Above Tg

Modulus – DMA

10360 MPa @ -40ºC
4280 MPa @ 25ºC
66 MPa @ 80ºC

Flammability, per UL-94

V-0

Dielectric Withstand Voltage, per MIL-I-46058C

>1500 volts

Dielectric Constant, at 1MHz and 25°C per ASTM D150-98

2.5

Dielectric Constant, at 10MHz and 22°C per ASTM D2520

3.21

Dissipation Factor, at 1MHz and 25°C per ASTM D150-98

0.01

Insulation Resistance, per MIL-I-46058C

8.0 x 1014 ohms (800TΩ)

Moisture Insulation Resistance, per MIL-I-46058C

4.7 x 1010 ohms (47GΩ)

Fungus Resistance, per ASTM G21

Pass

Resistance to Chemicals

Excellent

*Microwave UV cure ovens equipped with “H” style bulbs recommended.
**Stripper 1100 is not available in the EU.

 


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UV Curable Conformal Coating | HumiSeal UV40 | Dealer in India