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The wire is glued to the mylar with 3M 77 spray adhesive, then sealed with 3M Fastbond 30NF (Magnepan used to use Milloxane to seal, but no more). Newer Magnepans use 30 μm (0.0012") thick 1/8" (3 mm) wide aluminum tape instead of wire. When the aluminum tape is used instead of wires, Magnepan calls the speakers "Quasi-Ribbons". [2]
The exception to this is with special halogenated solvents that have a surface energy lower than PTFE, such as 3M's FC series solvents. [1] These 3M solvents are, however, toxic and expensive. Additionally, even if wettability is acceptable, the PTFE will not form hydrogen bonds which are the primary source of adhesion strength.
3M's Springfield, Missouri plant opened in 1967 and makes industrial adhesives and tapes for aerospace manufacturers. In 2017, 3M had approximately 330 employees in the metropolitan area , and announced a $40 million expansion project to upgrade the facility and redevelop another building.
Adhesives may be broadly divided in two classes: structural and pressure-sensitive. To form a permanent bond, structural adhesives harden via processes such as evaporation of solvent (for example, white glue), reaction with UV radiation (as in dental adhesives), chemical reaction (such as two part epoxy), or cooling (as in hot melt).
It is used as a film interface patch for sports and medical applications, featuring a pressure-sensitive adhesive backing, which is installed in strategic high friction areas of footwear, insoles, ankle-foot orthosis, and other medical devices to prevent and relieve friction-induced blisters, calluses and foot ulceration. [61]
In 1953, American professor Vernon K. Krieble developed anaerobic threadlocking adhesives in his basement laboratory at Trinity College in Hartford, Connecticut.Krieble's company, American Sealants, founded the Loctite brand, which was promoted as ushering in a new era of mechanical reliability by eliminating the vibrational loosening of mechanical fasteners, a frequent cause of machine ...
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