In the demanding field of medical device manufacturing, the reliability of a device often hinges on the quality of its smallest components—and the bonds that hold them together. For high-volume, precision applications like the assembly of catheters, introducers, and drainage tubes, manufacturers require adhesives that offer unmatched speed, precision, and regulatory compliance.
This guide is aimed at industrial users seeking the best adhesive technology to master the complexities of bonding along the shaft and securely attaching critical connectors.
The Essential Requirements for Medical Device Adhesives
When assembling single-use or reusable invasive devices, the adhesive must meet a stringent list of technical and regulatory requirements:
- Material Versatility: Catheters and tubes frequently involve joining dissimilar substrates, such as flexible PVC or TPE (for the shaft) to rigid ABS, Polycarbonate (PC), or stainless steel (for connectors and hubs). The adhesive must maintain high bond strength across all common plastics, rubbers, and metals.
- Regulatory Compliance: Any material used in direct or indirect patient contact must adhere to strict biocompatibility standards. The minimum requirement is often a demonstration that the product formulations meet ISO 10993-5 (Cytotoxicity) standards, ensuring they are suitable for use in medical applications.
- Sterilization Resistance: The final device must withstand common sterilization processes, including Gamma radiation, Ethylene Oxide (EtO), and E-beam. The adhesive bond must remain structurally sound post-processing.
- Manufacturing Efficiency: Ultra-fast cure times are non-negotiable for high-speed assembly lines, making cyanoacrylate (CA) technology a preferred choice for its instant, room-temperature fixture.
Introducing the Cyro-Weld™ Series: Incure’s Medical-Grade CA Solution
Incure’s Cyro-Weld™ Medical Cyanoacrylate Adhesives are specifically formulated to address these challenges. They offer a single-component, ultra-fast curing solution that achieves superior adhesion and performance across a diverse range of medical substrates.
For the assembly of catheter shafts and drainage tube connectors, you need a versatile workhorse adhesive capable of handling variable gap sizes and multiple material types.
The Recommended Solution: Incure Cyro-Weld™ CM-225
For the specific application of bonding along the shaft, securing connectors, and attaching introducer hubs, we recommend the Cyro-Weld™ CM-225 adhesive.
| Feature | Benefit for Catheter/Tube Assembly |
| Medium Viscosity (225 cP) | Ideal for gap filling found in multi-part connectors and hubs, while still flowing efficiently for general shaft bonding. |
| Ultra-Fast Setting | Maximizes production throughput, allowing for immediate handling and transfer in automated assembly processes. |
| High Strength, Multi-Substrates | Bonds Plastics (P), Rubbers (R), and Metals (M) with high-strength results, critical for robust connector-to-shaft joints. |
| Solvent-Resistant | Ensures the bond integrity is maintained when exposed to common medical fluids, solvents, and cleaning agents. |
| Medical/Military Grade | Formulation is tested to meet ISO 10993-5 standards, streamlining your internal regulatory qualification process. |
The Cyro-Weld™ CM-225 provides the perfect balance of flow control and assembly capability, making it the premier choice for securing components where precision and strength are paramount.
Key Applications in Catheter and Tube Manufacturing
The CM-225’s characteristics make it an ideal choice for the following critical bonding points:
- Connector/Hub Assembly: Used to secure rigid plastic or metal hubs (e.g., Luer connectors) to the flexible material of the catheter or drainage tube. The medium viscosity helps bridge small manufacturing tolerances, ensuring a hermetic seal.
- Bonding Along the Shaft: While lower-viscosity, wicking grades (like CM-3) are used for capillary action bonding on extremely tight sheaths, the CM-225 is excellent for applications requiring a bead of adhesive for added component stability or when bonding reinforcement features to the shaft’s exterior.
- Needle and Tubing Integration: Securing delicate introducer components, such as a sharp needle cannula into a plastic hub, where ultra-fast fixture and high tensile strength are necessary to prevent separation.
By leveraging an ultra-fast, multi-substrate solution like the Cyro-Weld™ CM-225, medical device manufacturers can significantly enhance both the efficiency and reliability of their critical fluid management and access devices.
Disclaimer: While Incure products are formulated to meet ISO 10993-5 standards and are designed to withstand common sterilization methods, it remains the medical device manufacturer’s responsibility to fully qualify and validate the adhesive within their specific device, production processes, and intended sterilization cycle to ensure final regulatory compliance and product performance.