Get on the Right Wavelength with LED Curable Conformal Coatings

Over the past several years, the development of conformal coatings for PCB and electrical protection has quickened. A certain advancement has grown in favor since it offers a wide range of potential advantages over its forerunners. These coatings are LED-curable.

The following would be a brief list of conformal coatings technologies currently in use:

acrylics (both solvent and water-borne) (both solvent and water-borne)
polyurethanes derived from solvents
synthetic rubber and polymers based on silicone (solvent-borne)
Acrylicated urethanes with UV cure using Parylene technology (arc and microwave bulb source)

Acrylicated urethanes with LED UV cure
In applications involving white goods and autos, where high volume throughput combined with minimal energy and maintenance needs might be crucial, LED curable conformal coatings are shown promise. In addition, several of the drawbacks of LED technology that formerly restricted its usage have been reduced or eliminated thanks to new discoveries and chemistries.

Limitations and Benefits of LED Curing

While employing LED light sources to cure conformal coatings offers a number of potential benefits, it has also historically had certain drawbacks.

LED curing has benefits such as single, specified wavelength curing with:

dependable and repeated treatment
less energy is needed. less heat is produced, there are probably few or no dangerous wavelengths, bulbs last longer, and maintenance expenses are decreased.
Past restrictions:

reduced energy transfer due to a restricted selection of coatings and photoinitiators that are challenging to cure on thicker coatings like conformal coatings for PCBs (For curing, lights must stay quite near to the surface.)
A New Strategy Produces Results

The polymer chemists at Chase Corporation have coupled their almost five decades of expertise in conformal coating creation with the most recent developments in photo-initiator technology. Their work and experience have led to a number of new additions to the HumiSeal® range of conformal coatings and supporting materials for the defense of PCBs and electronics, which has become the industry standard.

The HumiSeal UVA300LV is the most recent development to result from these efforts. This LED curable conformal coating demonstrates all the benefits of LED curable materials in addition to a number created especially for PCB protection requirements.

Tack-free curing using 385 or 395 nm LED UV light

low viscosity for selective application with a film coater

second-stage moisture treatment for uncovered regions

high elasticity, resistance to chemicals, and moisture

fluoresce under ultraviolet light for examination

Nearly all applications for traditional conformal coatings are appropriate for LED curable coatings. They are particularly useful in a few areas, including:

White goods such refrigerators, washers, and dryers HVAC control boards electrical car applications, such as power and safety controls and autonomous driving technologies, automotive PCBs because of their large volume and energy needs
The UVA300LV is especially well adapted to the high throughput demands seen in many automotive PCB applications, where the advantages of quick cycle times, low energy consumption, and lower frequency maintenance have been demonstrated to be of tremendous benefit. In addition, compared to many conventional UV curable coatings, UVA300LV was created with improved flexibility. This results in exceptional performance in a variety of thermal, mechanical, and stress tests used in the automobile sector.

Chase Corporation and HumiSeal® are suppliers of all major conformal coating forms and chemistries and may provide you assistance with a frank assessment of your application and procedure. We'll demonstrate ways to increase productivity, save costs, and enhance product dependability. Our top-notch manufacturing and technical support teams can deliver dependable worldwide supply, unrivaled quality, and excellent technical support to your firm.

Benwei UV 120cm led tube black light Product Specification: