Design guide for selecting adhesives for bonding cannulae to hubs in medical needles, covering material, process, and testing considerations.
This guide helps medical device manufacturers select appropriate adhesives for bonding cannulae to hubs in needle assemblies. It addresses challenges like joint geometry, material compatibility, and testing limitations of standard adhesives. The guide provides a step-by-step process for adhesive selection, including chemistries, viscosity, and performance data. It also covers needle design variables, manufacturing processes, and test methodologies to ensure reliable bonding performance.
The guide is intended for engineers and designers who need to optimize adhesive performance for specific needle designs while meeting stringent medical device requirements. It includes practical data, test procedures, and recommendations for adhesive candidates based on real-world performance rather than standard lab tests.
The typical depth for annular rings is between 0.005" and 0.008".
A diametrical gap of 0.002" is very common for these assemblies.
A typical viscosity range for pre-assembly dispensing is 3,000 to 30,000 cP.