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Adhesives for Needle and Syringe Assembly

Tangent Industries has developed a series of LED light curable adhesives that are ideally suited for bonding stainless steel cannula into hubs of various substrates and configurations. Tangent’s LEDcure family of adhesives are products that fully cure in fractions of a second under low intensity UV/visible or visible light. This provides manufacturers with the ability to select more economical curing systems for their assembly process, including those based on LED technology.

Each Tangent adhesive is typically available in several viscosity ranges to better match manufacturers’ hub designs and process requirements. Product specific viscosities can also be developed to optimize dispense/cure cycles involving unique hub and well configurations. Tangent adhesives are moisture resistant, and when fully cured, possess dry, tack-free surfaces. The adhesives are specifically formulated to meet USP Class VI and ISO 10993 biocompatibility standards, and are compatible with gamma, EtO, peroxide plasma, and E-Beam sterilization processes. Autoclave sterilization may be possible in limited applications.

Tangent’s needle and syringe assembly adhesives create high strength bonds that deliver consistent performance after sterilization and aging. To achieve maximum pull-strength with hubs molded from low surface energy polymers such as polyethylene and polypropylene, it is necessary to apply surface pre-treatment (corona, plasma, etc.), and/or incorporate annular rings in the hub inner well diameter.

These adhesives are ideal for the high volume production of disposable hypodermic needles, syringes, safety syringes, pen needles, winged infusion sets, and biopsy needles. Solvent-free and single component, Tangent medical device adhesives can be easily and precisely dispensed through stainless steel valves commonly used in device assembly processes. Fluorescing versions of each adhesive are available to enhance automated detection systems that monitor adhesive volume and profile.

View the needle/syringe assembly adhesives listed below for a possible candidate for your application. Please contact Tangent to confirm your product selection and to secure additional application assistance, including samples and process recommendations. In the event that these standard products do not satisfactorily address your performance requirements, Tangent will investigate other solutions that include development of adhesive specifically tailored to the complexity of your application.

Product Number Suitable Applications Viscosity cP mPa Shore Durometer 24 Hour Water Absorbtion LEDcure Bondable Substrates Comments/Features Request
TDS button TDS
Sample button Sample
6108 glass assembly 600-900 D75-85 < 1.0% yes glass, ceramic, metals, some plastics UV/Visible cure, low intensity curable, clear, RI@ 25°C=1.511% Request sample button TDS button
7041 needle/syringe assembly 50-150 D70-80 < 3.0% yes stainless steel, polycarbonate, PVC, treated polypropylene/HDPE UV/Visible cure, low intensity curable, clear, moisture resistant, generates highest tensile strength with LED curing equipment, tack-free Request sample button TDS button
7090-V-HS bonding/potting rigid plastics 10-150 D80-90 < 1.0% yes PC, PVC, polyester, other rigid plastics UV/Visible cure, secondary thermal cure, low intensity curable, wicking grade viscosity, withstands autoclaving, very hard, clear, suitable for medical device assembly Request sample button TDS button
7939-S bonding needles, syringes, stylets, and catheters 450 – 600 D 50 – 65 < 4.0% Yes olycarbonate, PVC, styrene, polyester, stainless steel, ceramic, glass well suited for bonding polycarbonate, PVC, styrene, and polyester, as well as dissimilar materials including stainless steel, ceramic and glass Request sample button TDS button
7989-V reservoir assembly/plastics bonding 3000-5000 D45-55 < 5.0% yes PC, ABS, PVC, polyester UV/Visible cure, clear, moisture resistant, flexible, tack-free, suitable for medical device assembly Request sample button TDS button

*Note: viscosity variations are typically available, or can be formulated, for all listed products. Please inquire with Tangent Applications Engineering for viscosity ranges not shown in the table.
**Note: modifications can be made to most products in order to meet unique performance requirements. Adding fluorescing properties, color, and secondary curing mechanisms are typical examples of minor modifications. Please contact Tangent Applications Engineering to discuss your specific requirements.

Contact Tangent Industries for more info.