Flexible magnets, also known as rubber magnets, are composed of ferrite powder mixed with a flexible binder, typically rubber or plastic. They are not as strong as traditional ceramic or rare-earth magnets, such as neodymium or samarium-cobalt, but they offer unique advantages in terms of flexibility and versatility.
The magnetic strength of flexible magnets is generally measured in terms of their magnetic energy product, typically ranging from 0.6 to 1.6 MGOe (Mega Gauss Oersteds). This is significantly lower than the energy product of neodymium magnets, which can exceed 50 MGOe. The pull force of flexible magnets is also relatively low, often ranging from 0.5 to 5 pounds per square foot, depending on the thickness and formulation.
Flexible magnets are designed for applications where a moderate magnetic force is sufficient, and where flexibility, ease of cutting, and lightweight properties are more critical. They are commonly used in refrigerator magnets, promotional items, magnetic strips, and signage. Their ability to conform to curved surfaces and be easily cut into various shapes makes them ideal for custom applications.
While they lack the strength of more rigid magnets, flexible magnets can be magnetized in different patterns, such as multi-pole or custom configurations, to enhance their holding power for specific uses. They are also resistant to demagnetization and corrosion, making them suitable for both indoor and outdoor applications.
In summary, flexible magnets are not particularly strong compared to other types of magnets, but their flexibility, ease of use, and adaptability make them valuable for a wide range of applications where high magnetic strength is not the primary requirement.