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
|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|
|catheter assembly||4000-6000||D75-85||< 1.0%||yes||stainless steel, glass, some plastics||UV/Visible cure, secondary thermal cure, clear, hard, withstands autoclaving|
|reservoir assembly||400-800||D25-35||< 1.0%||yes||stainless steel, ceramic, PU||UV/Visible cure, soft, flexible, high elongation|
|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|
|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|
|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|
|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|
|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|
|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|
|conformal coating||200-400||D75-85||< 1.0%||yes||FR4 epoxy board, glass, metal,ceramic,plastics||multicure: UV/Visible light / thermal / activator|
|conformal coating||70-150||D75-85||< 1.0%||yes||FR4 epoxy board, glass, metal,ceramic,plastics||multicure: UV/Visible light / thermal / activator|
|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|
|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|
*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.
Contact Tangent Industries for more info.