Norland Electronic Adhesive NEA 123W

SKU #NEA-123W
High viscosity thixotropic paste for tamperproofing, encapsulating, strain relief and wire tacking.
  • $60 material handling charge applied to Norland adhesives ordered in Australia.
  • Please note the Minimum Order Quantity (MOQ) requirements, particularly for small volume Norland items.
As low as AU$28.95 AU$31.85
Typically Ships in 10 to 15 Business Days
Part Number
NEA-123W

Introduction

Norland Electronic Adhesives 123W is a single component opaque white colored adhesive that cures tack free in seconds to a tough, resilient polymer when exposed to ultraviolet light. It is recommended as an extremely fast and efficient way to tack, fill, seal or bond precision components or wires in place. With this system, a drop of adhesive is used to form a bridge between the component or wire, and the substrate. Exposure to UV light quickly cures it, and holds the component in place. Useful applications for NEA 123W include Tamper Proofing, wire tacking, chip capacitor bonding, and coil termination.

The unique advantage of this adhesive is that even though it cures in seconds, it is extremely stable when not exposed to ultraviolet light. Norland 123W is sensitive to the whole range of UV light from 320 to 380 nanometers with peak sensitivity around 365 nanometers. The recommended energy required for full cure is 4.5 Joules/cm_ of long wavelength UV light. The adhesive has been designed to be spot cured in small areas with hand held or desk top UV light sources that are safe and easy to use.

Faster cure times are possible with medium pressure vapor lamps (typically 200 watts/linear inch). These are most commonly used in conveyorized applications because the light must be shielded from the operator. These types of lights are available from companies such as American Ultraviolet or Fusion UV Curing Systems, Rockville, MD.

In addition to the UV cure, Norland 123w contains a latent heat catalyst that can quickly cure areas that do not see the ultraviolet light. The catalyst allows the adhesive to cure in 10 minutes at 125°C in a convection oven, or 3 hours at 80°C. Faster cure times are possible with infrared ovens. Temperatures less than 60°C will not appreciably activate the adhesive. The advantage of the heat cure is to bring partially cured adhesive to full cure to get the maximum physical properties of the adhesive. The heat cure is not required if all the adhesive receives proper exposure to UV light.

NEA 123W has very good adhesion to glass, metals, printed circuit boards and many plastics. Since the cure is very exothermic, the adhesive should be allowed to cool back to room temperature before adhesive testing begins.

Typical Physical Properties of NEA 123W

 
Temperature Range -150 to 150°C
Color White Opaque
Viscosity 200,000-210,000 cps
Modulus (psi) 50,000
Tensile (psi) 3,000
Elongation at Failure 60%
Shore D Hardness 60
Dielectric Constant @ 1 MHz 4.00
Dissipation Factor 0.044
Volume Resistivity (ohm-cm) 1.0 x 10.12
Surface Resistivity (Megohms) 10 x 10.8
Dielectric Strength (volts/mil) 980
Arc Resistance (sec) 92

To remove uncured adhesive from substrate use an acetone or alcohol moistened cloth. The cured adhesive can be removed by prying the drop with a knife edge or soaking in a solvent combination of 90 parts methylene chloride and 10 part methanol.

Handling and Storage Precautions

CAUTION: Norland Electronic Adhesive 123W may cause skin irritation and prolonged contact with skin should be avoided. If contact occurs wash well with soap and water. Use in well ventilated area.

Store in a cool dark place. CAUTION: Do not freeze material. Never expose the bulk material to high heat or ultraviolet light. It can generate an extremely exothermic reaction.

More Information
Manufacturer Norland
Product Series Norland UV Curing Optical Adhesives
Industry Aerospace and Defence, Medical, Optical Equipment Manufacturing (OEM), Photonics, Research
Applications OEM (Optical Equipment Manufacturing), Assembling and disassembling multi-element systems
Standard Package Contains
Warranty Notes AusOptic Genuine Product Guarantee
Authorised distributor, benefit from manufacturer-backed, local warranty coverage, genuine parts, and our experienced local support team
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