Actual Case History
Corporations around the globe recognize the advantages of using Hernon high performance adhesives, sealants, and precision dispensing solutions.  One of the largest speaker manufactures recently tapped Hernon Manufacturing for a solution to a loudspeaker magnet bonding application.
Acoustic speakers are becoming smaller and more powerful, and expected to operate in severe environments for long periods of time.  These environmental factors such as high temperatures and vibration place extra emphasis on choosing the right components early in the design cycle.  Later in the design cycle, these decisions can make a large difference in the success of the project.
A longtime leader in the automotive speaker industry was asked to design and develop a new driver for the demanding automotive environment.  Early in the design and analysis, it was discovered that the adhesive currently used in bonding the magnet assembly would be too stiff at low temperatures.  This problem would cause high levels of stress in the assembly due to the thermal mis-match and ultimately lead to cracks in the magnets.  These cracks would lead to eventual failure and rejection of the loudspeakers.
Hernon's chemists began to work with the engineering department of the speaker manufacturer to produce an adhesive that was less rigid at low temperatures, but still offered high strength at elevated temperatures.  The most critical aspect of the adhesive was the ability to use the product efficiently in our high-volume production environment. Hernon Manufacturing, working closely with production engineers, developed a HASA™ (Hernon Anaerobic Structural Adhesive™) that met all of the performance requirements including high strength at elevated temperatures (85º C) while remaining pliable at low temperatures (-40º C).  This one part adhesive system cures in seconds using Hernon Environmentally Friendly™ (EF™) Primer 57.  The system quickly adapted to the production process, and the lack of solvents in the Hernon products eliminated environmental concerns.  The dispensing process is as simple as applying the Hernon EF™ Primer 57 to one surface, the adhesive to the opposite substrate, and then mate the parts.  The assembly reaches handling or fixture strength in just 15 seconds, with full strength in a few hours.
Josef Arnon, Hernon Technical Director, says, "The challenge of developing a new product is meeting the needs of the design as well as the demands of an efficient production process."  Partners such as Hernon Manufacturing that can meet customer requirements in such a short time frame the speaker manufacturer with keeping design and development on schedule and bringing enhanced speaker performance to market sooner.