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LOCTITE® AA 3922™ – Adhesive – Medical Device Assembly

• Item Name: LOCTITE® AA 3922™
• Manufacturer: Henkel
• Technologies: UV Acrylic
• Color: Transparent to hazy liquid
• Cure Type: Ultraviolet (UV) / Visible light
• Package Size: Contact to Techniq VN for details.
• Shelf Life: Contact to Techniq VN for details.

1. Product Overview

LOCTITE® AA 3922™ is a one-component, UV/visible light-curing acrylic adhesive designed for high-speed production. It exhibits excellent adhesion to glass, plastics, and metals and is suitable for applications requiring flexibility, fast curing, and autoclave resistance. The adhesive fluoresces under UV light for inspection and is ISO 10993 tested for biocompatibility, making it ideal for medical device assembly.

2. Applications

  • Bonding stainless steel cannulae into hubs, syringes, and lancets
  • Suitable for disposable medical devices
  • Adhesion to glass, plastics, and metals
  • High-speed production processes requiring UV curing

3. Typical Properties

Property Value
Uncured Properties
Chemical Type UV Acrylic
Appearance Transparent to hazy liquid
Fluorescence Positive under UV light
Specific Gravity @ 25°C 1.04
Viscosity (25°C, 1000 s⁻¹) 150 – 450 mPa·s (cP)
Curing Properties
UV Fixture Time (≤10 sec) 6 mW/cm² @ 365 nm
Tack-Free Time >60 sec @ 30 mW/cm²
Depth of Cure Up to 14 mm @ 100 mW/cm²
Cured Properties
Glass Transition Temperature (Tg) 75°C
Shore Hardness (D) 66
Elongation at Break 135%
Tensile Strength 18 N/mm² (2600 psi)
Tensile Modulus 630 N/mm² (92,000 psi)
Adhesive Performance
Needle Pullout Strength (22G, Polycarbonate) 205 N (46 lb)
Needle Pullout Strength (22G, Polypropylene – Plasma Treated) 220 N (50 lb)
Block Shear Strength (Acrylic to Acrylic) 7.0 N/mm² (1000 psi)
Block Shear Strength (Aluminum to Glass) 14.5 N/mm² (2100 psi)
Environmental Resistance
Heat Aging (1000h @ 100°C) 50% strength retention
Water Immersion (7 days @ 22°C) 14.2% water absorption
Sterilization Resistance Gamma, ETO, Autoclave up to 5 cycles

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BERGQUIST microTIM mTIM 1028 is purpose built for riding cage assemblies in servers, switches, and routers, interfacing with electroless nickel plated copper or aluminum heat sinks. It ensures stable operation in high power transceiver modules while also extending applicability to liquid cooling components, heat pipes, and fin based dissipative structures.

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