Flexible Permanent Magnet Composite for Wearable Static Field Therapy
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Solution Overview
Problem
Current magnetic biological effect products using hard permanent magnetic materials are uncomfortable, inflexible, and unsightly, and existing flexible magnet technologies are complex and limited in producing large-format, soft, and lightweight magnets suitable for biomedical applications.
Innovation Solution
A flexible permanent magnetic material composed of anisotropic neodymium iron boron and samarium iron nitrogen powders with a thermosetting silica gel binder, processed using a simplified method involving mixing, defoaming, pouring, and molding under a magnetic field to create a soft, bendable, and lightweight magnet with adjustable size and shape.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If hard permanent magnetic materials are used in magnetic biological effect products, then magnetic field intensity is sufficient, but comfort and flexibility are severely compromised
Solution Approach 1:
The patent uses a composite material system consisting of hard magnetic particles (neodymium iron boron and/or samarium cobalt) dispersed in a soft elastic polymer matrix (silicone rubber or thermoplastic elastomer). This composite structure combines the high magnetic field intensity of hard magnets with the flexibility and comfort of soft polymers, resolving the contradiction between magnetic performance and wearability.
Solution Approach 2:
The patent changes the physical state and properties of the magnetic material by transitioning from solid hard sintered magnets to a composite formulation where hard magnetic particles are embedded in a flexible polymer binder. This parameter change enables the material to maintain magnetic strength while gaining elasticity and conformability to body contours.
2Reliability
If hard sintered magnets are used in wearable devices, then magnetic effect is strong, but manufacturing complexity and shape limitations increase
Solution Approach 1:
The patent changes the manufacturing approach from sintering hard magnets into fixed shapes to a polymer-based composite formulation that can be molded into various shapes. The magnetic particles are mixed with the polymer binder and cured to form magnets with arbitrary geometries, simplifying manufacturing and enabling complex shapes for wearable applications.
Solution Approach 2:
By using a composite of hard magnetic particles and flexible polymer binder, the patent enables manufacturing of magnets in complex shapes that would be difficult or impossible to achieve with traditional hard sintered magnets. The polymer matrix allows for easy molding and shaping while maintaining magnetic performance.
3Ease of operation
If thick buffering layer is added to hard magnets, then comfort is improved, but aesthetics and magnetic effect are compromised
Solution Approach 1:
The patent eliminates the need for a separate thick buffering layer by incorporating soft elastic polymer directly into the magnetic material matrix. The hard magnetic particles are dispersed in the soft polymer binder, creating a material that is inherently both magnetically effective and comfortable against the skin, with no additional buffering layer required.
4Ease of operation
If flexible bonded magnets with rubber binders are used, then flexibility is achieved, but manufacturing process complexity increases
Solution Approach 1:
The patent changes the binder material from rubber to silicone rubber or thermoplastic elastomers, which offer similar flexibility but with simpler processing characteristics. The use of thermoplastic elastomers in particular allows for simplified manufacturing through injection molding or extrusion processes, reducing the complexity associated with traditional rubber bonding processes.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution results in magnetic biological effect products that are comfortable, easy to process, and suitable for long-term use, providing effective and efficient static magnetic field therapy without chemical stimulation, with magnetic field intensity up to 5000 gausses.
Implementation Method 1
the directional edge of the blank is compressed into a rigid anisotropic bonded magnet with a specified shape under the action of a directional magnetic field
Data Source
AI summary
A flexible permanent magnetic material, a preparation method and an application thereof in magnetic biological effect products are provides, relating to the technical field of medical equipment. Raw materials of the flexible permanent magnetic material of the application include the following components in parts by weight: 0-70 parts of anisotropic neodymium iron boron powder and 0-40 parts of anisotropic samarium iron nitrogen powder and 3-20 parts of binder.