
Electric Motor Reliability with Huntsman ARALDITE® Encapsulation Potting – Casting
Electric Motor Reliability with Huntsman ARALDITE® Encapsulation Potting – Casting
• Item Name: U304
• Manufacturer: H.B. Fuller (Cyberbond)
• Technologies: UV-curable, modified acrylate
• Color: Light Straw (uncured), Colorless solid (cured)
• Cure Type: UV light initiated, full cure in 24 hours
• Package Size: Contact to Techniq VN for details.
• Shelf Life: 9 months
U304 is a medium-to-high viscosity, medical-grade UV-curable adhesive designed for bonding a wide variety of plastics in multiple configurations. It offers strong, flexible bonds and is suitable for joining dissimilar substrates. Certified to ISO 10993-5 for cytotoxicity, it is safe for use in medical devices. The adhesive cures via photoinitiation, reaching handling strength quickly and achieving full strength and solvent resistance within 24 hours.
Key Highlights:
Base Compound: Modified Acrylate
Appearance (Uncured): Light Straw Liquid
Shelf Life: 9 months
Storage: 8°C to 21°C, in darkness
RoHS-Compliant: Yes
Curing: UV light, 395 nm @ 50 mW/cm²
Tack-Free Surface upon curing: Yes
Bonding a wide range of plastics including PC, PMMA, PETG, and metal
Suitable for medical devices due to ISO 10993-5 certification
Effective for dissimilar substrate bonding
Ideal in applications requiring fast handling strength and flexibility
General Instructions:
Ensure surfaces are clean and dry.
Apply a thin layer of adhesive to one surface.
Press parts together and expose to UV.
Handling strength develops quickly; full strength and solvent resistance are achieved in 24 hours.
Store unopened products in a cool, dry place, away from direct sunlight.
Property | Uncured (Monomer) | Cured (Polymer) |
---|---|---|
Appearance | Light Straw Liquid | Colorless Solid |
Base Compound | Modified Acrylate | – |
Viscosity | 1000 ± 150 cps | – |
Tack-Free Surface | – | Yes |
Elongation | – | 175% |
Shore Hardness | – | Shore A 70, Shore D 20.7 |
Setting Time* | – | 3,000 sec @ 395 nm, 50 mW/cm² |
Full Cure Time | – | 24 hours |
Optimal Wavelength | – | 300–395 nm |
Solvent Resistance Examples | – | Strong resistance to aromatic hydrocarbons, aliphatic hydrocarbons; weak resistance to halogenated hydrocarbons, ketones, esters, strong acids/bases |
*Cured at 395 nm, 50 mW/cm²
Performance Range (Bond Strength by Substrate, N/mm²):
PC: 7.6
PMMA: 6.2
Glass: 4.1
PETG: 5.5
Metal: 6.2
Electric Motor Reliability with Huntsman ARALDITE® Encapsulation Potting – Casting
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