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ABchimie™ 746E UV LED

1 of 6 products in this brand
ABchimie™ 746E UV LED is a single transparent component designed to protect printed circuit boards in harsh environments. It has dual cure technology (UV/LED - humidity) for shadow crosslinking. ABchimie746E UV LED can be applied using a brush, pad printing, spray machine, and, of course, a selective coating machine, which is the best method. Because of our system's low viscosity, we can limit the thickness to around 80 microns.

Product Type: 1K (1 component) Coating, Conformal Coating, Radiation Curable Coating, Varnishes

Features: Excellent Dielectric Properties, Excellent UV Stability, Fast Cure, Fast Curing, Good Adhesion, Low Viscosity, Microbe Resistant, Soft, UV Curable

Application Area: Printed Electronics

Application Method: Brush, Gun, Spray

Chemical Family: Urethane Acrylates

Technical Data Sheet
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Identification & Functionality

Chemical Family

Features & Benefits

Labeling Claims
Features

• Excellent adhesion in harsh weather conditions,
• Fluorescent UV to allow control of the deposited varnish layer,
• Operating temperature range - 55°C to + 150°C,
• Can be soldered through without fear of highly toxic gasses being produced,
• Resistant to mold growth,
• Excellent dielectric properties,
• Very fast curing under UV/LED exposure,
• Moisture cure for shadowed areas,
• No VOC,
• Space ground reduced compared with solvent bases,
• High speed process, increase of the productivity,
• Utilization with select coat machine (used on head SC200, SC280, SC300 and SC400)
• Approved UL94 V0 (QMJU2-E308681)
• Approved UL746E.

Applications & Uses

Application Area
Application Method
Applications
ABchimie746E UV LED can be applied by brush, spray or selective coating machine:
Spraying (two crossed layers) 60-80 microns
Brushing 40-60 microns
Selective coating machine
80-120 microns (380mm/s)

The relative humidity of at least 50% is recommended for the second polymerization mechanism.
Before applying the printed circuit board must be clean, dry and free of moisture. Pcbs are humidity sensor, it is important to remove it before coating application. A stage in an oven for 4 hours at 80°C is usually sufficient.
The varnish ABchimie746E UV LED contains a fluorescent tracer which permit to check good varnish deposit, inspection of circuits is facilitated. Fluorescence is more important the thickness applied is high.
 

Properties

Physical Form
Appearance
Transparent, Transparent Yellow
Typical Properties
ValueUnitsTest Method / Conditions
Base (Liquid)Urethane Acrylate
Non-Volatile Residue (Liquid)min. 97%
Viscosity (25°C, Liquid)50 - 100cSt
Flash Point (Liquid)min. 100°C
Film Thickness (Liquid)30 to 150 microns
Cured Properties
ValueUnitsTest Method / Conditions
Adhesion (Excellent)Class 0ISO 2409
Volume Resistivity1 x 10¹⁴Ohm / cm
Insulation Resistance (Ω)10¹²ΩEN 61086
Dieletric Strength60.0kV/mm
CTI (DIN EN 60112 on FR4)600.0
Glass Transition Temperature (Tg)16.0°C
CTE (T < Tg)200.0ppm/°C
CTE (T > Tg)250.0ppm/°C
VRT + Humidity (93%HR / -10°C, 5°C/mn)65.0°CIEC 60068-2-38
Thermal Shock (30mn/30mn, 50 Cycles)- 65 to +125°C
Voltagemin. 1750V DCNF EN 61086
Temperature Range- 55 to + 150°C
Auto-ExtinguishingUL94 V0
Varnish Removal Method

Mechanical (micro-abrasion) Locally with stripper DVP

Regulatory & Compliance

Certifications & Compliance
Regulations

ABchimie746E UV LED is compliance with REACH and RoHS regulations.

Technical Details & Test Data

Preparation of The PCB

PCBs must be free of moisture and perfectly clean (no dust, grease, wax…). Adhesion of the coatings is depending. All traces of flux are eliminated because they can become corrosive and create malfunction of the circuit. We recommend using cleaning solvent or detergents SND, DNS or CIPEX 40 or 42.
Cleaning:
To clean equipment or clean uncured varnish ABchimie746E UV LED, we recommend using SND or DNS solvent.
Curing Conditions
ABchimie746E UV LED cures with UV LED rays and moisture for the second cure mechanism.
UV LED Curing :
It is important to use the appropriate LED equipment, as well as the recommended settings for the best properties of ABchimie 746E UV LED:
LED lamp 395 nm, Power : 8W/cm²
Exposure time: 0,2s mini
Distance LED light – varnish : 0 to 10cm

Minimum UVA2 dose : 700mJ/cm² (100μm)
A slight residual tack du to the oxygen in the air can appear. It disappears a few minutes after passing under the lamp.
The UV dose given is a minimum to guarantee a good curing of varnish. A higher dose of UV or a overexposure will not damaged the product.

Benefits of Dryers LED-UV

LED lamp solves temperature problems and permit to earn space compare to UV oven.
They are indeed many advantages:
• No temperature on the substrate
• Reduced power consumption
• Environmentally friendly = no ozone therefore no air extraction system
• Distance from lighting 1 to 3 cm without loss of power
• cooling air or water
• Turning on and off snapshots
• Shelf life 15-25 000H
• Variation of power 0 to 100%
• High power density and variable geometry.
UV-LED lamps help maintain a high intensity longer than mercury arc lamps.
ABchimie™ 746E UV LED - Benefits of Dryers Led-Uv
Process can work with recommended UV LED oven:
UVLED395 from SMT Europe
Moisture cure:
Ambient temperature, 50% minimum relative moisture
Curing mechanism :
ABchimie™ 746E UV LED - Benefits of Dryers Led-Uv - 1

Packaging & Availability

Packaging
PACKAGING: REFERENCES
Varnish ABchimie746E UV LED
ABchimie746E UV LED 01L
1 liter
ABchimie746E UV LED 05L
5 liters  
Varnish ABchimie746E UV (curing with UV lamp)
1 liter
ABchimie746E UV 01L
5 liters
ABchimie746E UV 05L
Cleaner
Bulk 5 liters SND 05L
Bulk 5 liters DNS 05L

Storage & Handling

Storage Handling

Storage temperature: 5 to 30°C
A temporary lower or higher temperature (maximum 40°C) during few days (transport) doesn’t distort varnish properties.
ABchimie746E UV LED must be stored in an opaque container, sealed away from excessive heat, at temperatures not exceeding 40°C. The varnish ABchimie746E UV LED cures under UV action, it musn’t be exposed to any light source.
This varnish also crosslinking with moisture, make sure there is no moisture in the deposition process and in cans open. After opening a bottle, it is recommended to purge these cans started with a dry inert gas (nitrogen) to prevent polymerization of the coating during storage.
Date by use: 12 months after the date of manufacturing