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Medical Grade Two-Part Epoxy Combines Electrical Insulation and Thermal Conductivity

Posted on 8/21/2020 9:54:50 AM By ASC
  

A new opaque black epoxy adhesive hit the market for use in the manufacture of medical devices which brings electrical insulation and thermal conductivity together with non-cytotoxicity and biocompatibility according to Master Bond. The new two-part epoxy is also capable of withstanding radiation, chemical sterilants, and repeated autoclaving cycles according to the company.

Master Bond reports that the black epoxy adhesive offers both heat resistance and cryogenic serviceability for service in temperatures ranging from a low of 4K (-484,15°F) to a high of 400°F, and has a thermal conductivity of 9-10BTU.in.

Master Bond reports that its 500,000 to 550,000 psi tensile modulus,24,000 to 26,000 psi compressive strength, and 7,000 to 8,000 psi tensile strength and good flow rate make it suitable for bonding, sealing or coating substrates like composites, glass, rubbers and ceramics as well as metals and plastics. The adhesive also has a filler which supports its high strength profile and dimensional stability.

Although fully curable at room temperature, curing would be quicker with heat, but reach its optimal cure with a combination of both. This involves adding two to three hours of heat curing at between 150 and 200°F after overnight exposure to room temperature. The epoxy has low shrinkage and low exotherm after curing, making it suitable to use for castings with thicknesses of up to two or three inches.  



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