Acoustic diaphragm with polyurethane elastomer coating

摘要: An acoustic diaphragm has a substrate of either hard resin film or cloth an organic material, and at least one side the is laid with polyurethane elastomer layer. In case substrate, optionally metallized by evaporation deposition Al Ti and/or impregnated thermosetting resin. The copolymer given condensation bifunctional polymeric alcohol glycol diisocyanate. This features flat response curve medium to high frequencies on account its relatively large value for Young's modulus adequately great internal loss, accordingly particularly useful tweeters.