Home / Applications / Adhesives for Hearing Aid/Audiology Device Assembly

Adhesives for Hearing Aid/Audiology Device Assembly

Tangent Industries offers light curable medical device adhesive products that address the challenges of hearing aid assembly and their operating environments. The inner ear canal surface is acidic, coated with a combination of oil, perspiration, and ear wax. Hearing aid devices must function in this wonderland, and require assembly adhesives that are impervious to these substances to ensure reliable operation. Hearing aid assembly also has its challenges. Shells and faceplates are molded in assorted colors using pigmented resins. Pigmentation reduces the transmission of light energy, which has a negative impact on curing typical light curable adhesives. Longer curing cycles and higher power equipment is typically required to overcome lower light transmission.

Tangent Industries offers light curable medical device adhesive products that address the challenges of hearing aid assembly and their operating environments. Tangent’s selection of adhesives includes our exclusive LEDcure light curable adhesives. LEDcure adhesives will fully cure under low intensity UV or visible light in seconds. They are ideal for use with LED light curing equipment. The ability to cure with low intensity light makes these adhesives particularly well suited for applications involving pigmented substrates. Typical applications include faceplate/shell bonding, as well as attaching receiver tubes to the shell.

LEDcure adhesives are extremely clear in appearance. They offer cured properties from hard/rigid to soft/flexible. Cured surfaces are smooth and tack-free, including products with the greatest elongation and flexibility.

View the hearing aid/audiology device 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
5140 bonding/laminating flexible materials and those with differing CTE values 250-500 A45-65 < 1.0% yes wide range of plastics, ceramic, glass,stainless steel UV/Visible cure, extremely soft, highly flexible, tack-free surface, clear, suitable for medical device assembly Request sample button TDS button
6108-T catheter assembly 4000-6000 D75-85 < 1.0% yes stainless steel, glass, some plastics UV/Visible cure, secondary thermal cure, clear, hard, withstands autoclaving Request sample button TDS button
6162 reservoir assembly 400-800 D25-35 < 1.0% yes stainless steel, ceramic, PU UV/Visible cure, soft, flexible, high elongation 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
7173-V bonding PVC and polyethylene components 200-300 D70-79 < 4.0% yes PVC, PC, other plastics UV/Visible cure, best for highly plasticized PVC, tack-free surface, suitable for medical device assembly Request sample button TDS button
7551 bonding rigid plastics 1300-2000 D80-90 < 1.0% yes PC, PVC, styrene, some metals UV/Visible cure, low intensity curable, clear and very hard, highly resistant to yellowing and moisture Request sample button TDS button
7551-VF bonding rigid plastics 1300-2000 D80-90 < 1.0% yes PC, PVC, other plastics UV/Visible cure, low intensity curable, tack-free surface, fluorescing, suitable for medical device assembly 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
90024 conformal coating 200-400 D75-85 < 1.0% yes FR4 epoxy board, glass, metal,ceramic,plastics multicure: UV/Visible light / thermal / activator Request sample button TDS button
90034 conformal coating 70-150 D75-85 < 1.0% yes FR4 epoxy board, glass, metal,ceramic,plastics multicure: UV/Visible light / thermal / activator Request sample button TDS button
Vitralit 2004-F conformal coating 60-100 D15-25 < 1.0% no FR4 epoxy board, glass, metal,ceramic,plastics UV cure, secondary thermal cure, soft/flexible cationic epoxy, clear, chemical resistant, fluorescing, ideal for spray dispense Request sample button TDS button
Vitralit 2007 conformal coating 200-300 D40-50 < 0.5% no FR4 epoxy board, glass, metal,ceramic,plastics UV cure, secondary thermal cure, flexible cationic epoxy, clear, chemical resistant, fluorescing 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.