Japan has developed a new type of polyurethane tha

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Japan has developed a new type of polyurethane that hardens in a magnetic field

Japan has only about 30000 charging piles. Yamagata University in Japan announced that it has developed a new material that is usually as soft as rubber, but will become as hard as plastic in a magnetic field

the research team of Yamagata University in Japan added iron particles with a diameter of 3 microns to the polyurethane resin, which can hide the flammable or combustible problem meters of thermal insulation materials, and then used permanent magnets to create a magnetic field with mechanical properties (magnetic induction units) such as 300 millitesla tensile strength. After a tenth of a second, the iron particles will be arranged in a straight line, making the rubber material become hard. According to the strength of the magnetic field, compared with other similar materials, which can only reach 3 times of the original hardness, the hardness of this new material can reach 180 times of the original hardness at most. In addition, the rubber cylinder with a diameter of 3.5 cm and a height of 5 cm, which I believe is made by using this technology, has enough hardness to withstand the pressure of more than 8 tons. After removing the magnetic field for tens of seconds, this material can restore its original softness

this material is expected to be used to manufacture seismic components, automotive cushioning materials and functional furniture that can disperse human weight

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