Rubber soft magnet, also named flexible rubber magnet, is a traditional and mature flexible permanent magnet composite material, which is mainly composed of strontium ferrite or barium ferrite magnetic powder and rubber polymer matrix, processed through high-temperature mixing, calendaring, vulcanization and molding. The product is divided into two main forms: coil material and sheet material, which can meet the continuous rolling supply and fixed-size sheet use requirements of different industrial scenarios. As a cost-effective flexible magnetic material, rubber soft magnet coil and sheet integrate the elasticity of rubber and the magnetic properties of ferrite magnets, featuring soft texture, good toughness, arbitrary bending, no brittleness, and easy processing, and have become the most widely used flexible magnetic products in civilian and industrial fields. The overall production process of rubber soft magnets is mature and stable, with low production cost, high yield, and good batch consistency, which is suitable for large-scale standardized production and customized personalized processing.

In terms of physical and magnetic properties, rubber soft magnet coil and sheet have stable and reliable magnetic performance. The conventional magnetic energy product ranges from 1.5–3.5 MGOe, with uniform magnetic distribution and stable magnetic attraction, no sudden change of magnetic force in the whole use area. The material has excellent flexibility and mechanical properties, can be rolled into coils, folded arbitrarily, bent into curved surfaces of different radii, and will not crack or break after repeated bending. Its hardness is moderate (shore A 60–80), with good wear resistance and compression resistance, and it can resist daily friction and slight extrusion without deformation. The product has excellent dimensional adaptability: the coil material supports continuous length production, with adjustable width from 10mm to 1200mm and thickness from 0.4mm to 5mm; the sheet material can be cut into standard sizes such as A4, A3 and customized special sizes, with flat and smooth surface, no bubbles, no wrinkles, and high flatness. In addition, the rubber soft magnet has good insulation performance, with a breakdown voltage of more than 5kV, which can effectively isolate current and avoid electromagnetic short circuit, and is safe and reliable for electronic and electrical applications.

In terms of environmental resistance and service life, rubber soft magnet coil and sheet have outstanding advantages. The vulcanized rubber matrix forms a compact and stable protective structure, which has excellent waterproof, moisture-proof, anti-corrosion and anti-aging capabilities. It can work stably in humid environments such as kitchens, bathrooms and outdoor open environments for a long time, and is not easy to oxidize, rust or deform. The working temperature range is -30°C to 70°C, which covers most civilian and industrial conventional working environments. The product has strong anti-fatigue performance, and its magnetic and mechanical properties will not decay significantly after tens of thousands of repeated bending and adsorption cycles, with a service life of more than 8 years in conventional environments. Moreover, the rubber soft magnet is environmentally friendly and non-toxic, compliant with EU ROHS environmental protection standards, free of heavy metal harmful substances, safe for contact with human body and food packaging, and suitable for civilian daily necessities and children's toy products.

Rubber soft magnet coil and sheet have extremely wide application coverage. In the daily civilian field, they are widely used in refrigerator magnetic stickers, whiteboard magnetic stickers, photo wall magnetic fixing, door and window magnetic sealing strips, cabinet door magnetic suction parts, providing convenient and reusable magnetic fixing solutions for daily life. In the packaging industry, they are used for magnetic closures of gift boxes, cosmetic boxes, packaging boxes, instead of traditional iron sheet magnetic buckles, with softer texture and no damage to packaging materials. In the advertising and cultural and creative industry, coil materials are used for continuous production of advertising magnetic posters, car body magnetic stickers, outdoor promotional magnetic displays, which are easy to paste and peel, and will not leave residual glue on the attachment surface. In the industrial field, they are used for magnetic induction strips of mechanical equipment, auxiliary magnetic fixing of production tooling, dust-proof magnetic strips of equipment shells, and magnetic protective parts of automated assembly lines. In addition, in the fields of toy manufacturing, stationery production, automotive interior sealing, and medical auxiliary fixing, rubber soft magnet coil and sheet are indispensable basic magnetic materials. With the advantages of low cost, high flexibility, easy processing and long service life, they maintain stable market demand and are the mainstream flexible magnetic products in the low and medium-end magnetic material market.