Knowde Enhanced TDS
Identification & Functionality
- Chemical Family
- Technologies
- Product Families
Features & Benefits
- Labeling Claims
- Ready-to-Use Product Features
- 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
- Markets
- Application Area
- Cure Method
- Coating Type
- 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
- Cured Properties
- Varnish Removal Method
Mechanical (micro-abrasion) Locally with stripper DVP
Value | Units | Test Method / Conditions | |
Base (Liquid) | Urethane Acrylate | - | - |
Non-Volatile Residue (Liquid) | min. 97 | % | - |
Viscosity (25°C, Liquid) | 50 - 100 | cSt | - |
Flash Point (Liquid) | min. 100 | °C | - |
Film Thickness (Liquid) | 30 to 150 | microns | - |
Value | Units | Test Method / Conditions | |
Adhesion (Excellent) | Class 0 | ISO 2409 | - |
Volume Resistivity | 1 x 10¹⁴ | Ohm / cm | - |
Insulation Resistance (Ω) | 10¹² | Ω | EN 61086 |
Dieletric Strength | 60.0 | kV/mm | - |
CTI (DIN EN 60112 on FR4) | 600.0 | - | - |
Glass Transition Temperature (Tg) | 16.0 | °C | - |
CTE (T < Tg) | 200.0 | ppm/°C | - |
CTE (T > Tg) | 250.0 | ppm/°C | - |
VRT + Humidity (93%HR / -10°C, 5°C/mn) | 65.0 | °C | IEC 60068-2-38 |
Thermal Shock (30mn/30mn, 50 Cycles) | - 65 to +125 | °C | - |
Voltage | min. 1750 | V DC | NF EN 61086 |
Temperature Range | - 55 to + 150 | °C | - |
Auto-Extinguishing | UL94 V0 | - | - |
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.
Process can work with recommended UV LED oven:
UVLED395 from SMT Europe
Moisture cure:
Ambient temperature, 50% minimum relative moisture
Curing mechanism :
Packaging & Availability
- Packaging
PACKAGING: REFERENCES Varnish ABchimie746E UV LED ABchimie746E UV LED 01L1 liter ABchimie746E UV LED 05L5 liters Varnish ABchimie746E UV (curing with UV lamp) 1 liter ABchimie746E UV 01L5 liters ABchimie746E UV 05LCleaner 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