Binder magnets appeared around the 1970s, when SmCo was commercialized. The market situation of sintered permanent magnet is very good, but it is difficult to be precisely machined into a special shape, and it is easy to have problems such as cracking, breakage, edge loss and Angle loss in the process of machining. Besides, it is not easy to be assembled, so its application is limited. To solve this problem, engineers pulverized permanent magnets, mixed them with plastic, and pressed them into shape in a magnetic field, probably the most primitive way to make bonded magnets. Flexible NdFeB magnets are widely used due to their low cost, high size accuracy, large shape freedom, good mechanical strength, light specific gravity and other advantages. Since the invention of Flexible NdFeB magnets, the average annual growth rate has been 35%. Since the appearance of NdFeB permanent magnetic powder, Flexible NdFeB magnets have developed rapidly due to their high magnetic properties.
Since 1988, when Flexible NdFeB was successfully manufactured, the material has developed fairly rapidly and yields have increased exponentially. Flexible NdFeB, as a high performance permanent magnetic material, is in line with the trend of short, small, light and thin development of contemporary electronic products.
Flexible NdFeB is mainly used for office automation equipment, electrical equipment, audio-visual equipment, instrumentation, small motors and metering machinery. It is widely used in the fields of mobile phone, cd-rom, dvd-rom drive motor, HDD of hard disk spindle motor, other micro-special dc motor and automatic instrument and meter. In recent years, the application proportion of Flexible NdFeB permanent magnetic materials in China is as follows: computers account for 62%, electronics industry 7%, office automation equipment 8%, automobiles 7%, appliances 7%, and others 9%.