10 Latest Application Scenarios:

As we all know from refrigerator stickers to car motors, billboards to medical devices. Gradually the field of application gradually become wide. As a ferrite, neodymium iron boron, samarium iron nitrogen magnetic powder in rubber combination of functional magnets, rubber magnets because of its own unique flexibility, processability, environmental protection, has become the industry in the consumer field of influence of the champion.

Ⅰ.Core Advantages of Rubber Magnetic: Why it can overturn the traditional magnetic material?

• Excellent physical properties 

Flexible and moldable: it can be cut, punched and curled at will, and supports customized complex shapes (e.g. rolls, sheets, rings).

Strong environmental adaptability: working temperature ranges from -26℃ to 80℃, corrosion-resistant, aging-resistant, and the surface can be coated with PVC or double-sided tape to enhance functionality.

Safety and environmental protection: conforms to EN71, RoHS and other international standards, no toxic residue.

• Magnetic Property Grading Applications 

• Low-cost and high-efficiency: Wide range of raw material sources, can be molded quickly by extrusion, calendering, and injection molding, reducing processing losses.

Ⅱ .Ten application areas: how to penetrate the rubber magnet into thousands of trades and industries?

1. Home and daily necessities 

Decorative convenience: refrigerator stickers, magnetic photo frames, magnetic picture boards, both practical and interesting.

Functional upgrading: door and window sealing strip to improve the sound insulation and dustproof performance, magnetic mattress magnet for health care bedding.

2. Office and advertising 

Flexible display: magnetic whiteboard labels, removable billboards, support repeated paste updates.

Creative design: 3M adhesive backing or color printing PVC, personalized logo (such as corporate logo, exhibition signage).

3. Automotive & Industrial 

Lightweight fixing: car label sticking, lamp bracket, door lock spacer, replacing mechanical fasteners.

Intelligent warehousing: magnetic cargo labels, tool positioning boards, optimize workshop management efficiency.

4. Electrical & Electronic 

Precision components: computer cooling fans, air conditioner motors, printer drive components, relying on the high stability of anisotropic rubber magnets.

Electromagnetic protection: Shield electronic equipment interference, enhance product reliability.

5. Medical and Healthcare 

Physical Therapy Devices: Magnetic therapy patches relieve pain and promote blood circulation.

Equipment fixation: Safe adsorption of medical instruments to avoid the risk of slipping off.

6. Educational toys 

Enlightening tools: magnetic puzzles, letter modules, help children cognitive learning.

Safety design: no sharp edges, in line with toy safety standards.

Industry data insight: a family car needs to consume nearly 20kg of raw rubber production of rubber fittings15, while the rubber magnet penetration rate in microtome is over 60%11 - which confirms its irreplaceability in the industrial chain.

Ⅲ. Technological Evolution and Future Trends 

• Material High Performance 

New base materials such as fluoroelastomer and hydrogenated nitrile rubber enhance oil resistance and high temperature resistance (up to 176°F), and are adapted to new energy vehicle parts.

Thermoplastic elastomer (TPE) to replace traditional rubber, taking into account environmental protection and cost 15.

• Process Intelligence 

The integrated injection molding equipment achieves ±0.02mm precision (e.g., Daqo Robotics production line).

Magnetization process optimization: magnetization before vulcanization improves magnetic field stability, and magnetization after vulcanization simplifies the process.

• Application Innovation 

Robot Collaboration: Explosion-proof rubber magnets are used in wheel coating robots, adapting to flexible production lines.

Medical exploration: Ultra-thin ECG patches with magnetized components to promote the upgrading of wearable devices.

• The era of “soft power” of rubber magnets 

From household gadgets to industrial core components, rubber magnets crack rigid demands with flexibility and open up innovative scenarios with customizability. As the new quality productivity puts higher demands on materials, its evolution direction of “thin, light, strong magnetic and intelligent” will surely give rise to more cross-border applications.

In this era of pursuing flexibility and efficiency, the boundaries of rubber magnets only depend on our imagination.

Kingsmagnet’s rubber magnetic strips are flexible, elastic, and twistable magnets made by combining rubber with magnetic materials. The production process involves several key steps:

1. Raw Material Preparation

• Magnetic Powder Selection:
  Depending on the desired performance, suitable magnetic powders such as barium ferrite or strontium ferrite are selected. Key properties like particle size, purity, and magnetic strength directly affect the final product.

• Rubber Base Selection:
  Rubber materials such as neoprene, nitrile rubber, or EPDM are chosen as the carrier matrix. Each type of rubber offers specific advantages—like oil resistance, aging resistance, or flexibility—based on the end-use environment.

• Additive Preparation:
  Additives such as curing agents, antioxidants, and fillers are prepared to enhance the rubber's processability and improve the strip’s physical and chemical stability.

2. Mixing

• Equipment Setup:
  Open mills or internal mixers are used. Open mills mix materials using two rotating rollers, while internal mixers blend materials in a closed chamber using rotors.

• Mixing Process:
  First, the rubber is plasticized to improve its processability. Then, magnetic powder and additives are added in a specific order and timing. Key factors like temperature, time, and mixing strength are carefully controlled to ensure uniform blending and product quality.

3. Forming

• Extrusion:
  The mixed compound is pushed through an extruder to create continuous rubber magnetic strips with a desired cross-section. This method offers high efficiency for long-length production.

• Calendering:
  The compound is flattened into sheets using calendering rollers, then cut or stamped into shape. Calendering produces smooth, evenly thick strips, ideal for thinner products.

• Compression Molding:
  The compound is placed in a mold and formed under heat and pressure. This method is suited for complex shapes with high dimensional accuracy, often used in small-batch or precision applications.

4. Curing (Vulcanization)

• Purpose:
  Vulcanization causes the rubber molecules to crosslink, forming a stable three-dimensional network. This enhances strength, hardness, elasticity, and resistance to aging.

• Process:
  The curing method (e.g., hot air, steam, or flat-plate vulcanization) and parameters (temperature, time, pressure) are selected based on the rubber type and product needs.

5. Magnetization

• Principle:
  A strong magnetic field is applied to align the magnetic domains in the powder, giving the strip its magnetic properties.

• Methods:
  Depending on the product’s shape and magnetic requirements, techniques such as pulse or direct current magnetization are used, with precise control of parameters.

6. Post-Processing and Inspection

• Finishing:
  The magnetic strips may be trimmed, cleaned, or coated with protective layers to enhance appearance and durability.

• Quality Inspection:
  Finished products undergo thorough testing, including:

  • Magnetic properties (remanence, coercivity, intrinsic coercivity)

  • Physical properties (hardness, tensile strength, elongation)

  • Visual and dimensional checks
    Only qualified products are approved for market release.

Flexible rubber magnets are common soft magnetic material products, the material is usually made of magnetic powder mixed with rubber substrate. This material combines the properties of magnetism and rubber with soft, bendable, and cuttable features, and is widely used in many fields such as advertising display, stationery office, packaging sealing, label identification, and industrial accessories. They are soft, cutable and easy to process.

There are three kinds of common rubber magnets: rubber magnetic sheet, rubber magnetic strip, rubber magnetic roll, or other customized shapes.

Flexible Rubber Magnet Sheet

Characteristics: Bendable and cuttable, suitable for various irregular shapes; Surface can be coated (such as colored PVC, PET) or with adhesive (adhesive backing); Support silkscreen, UV printing, paper or PVC card surface

Applications: Magnetic fridge magnets, magnetic car slogans; Magnetic advertising slogans and other products

Flexible Rubber Magnet Strip

Features: Easy to roll or use in batches, and the length of each roll should not exceed 50 meters. One side of the magnet can have a back adhesive or no back adhesive.

Applications:

Refrigerator door sealing strips, window screen magnetic strips; Whiteboard border, magnetic advertising frame; The packaging box has a hidden magnetic structure.

Flexible Rubber Magnet Labels 

Usually pre-cut flexible magnetic sheet/strip, PVC or paper surface, can be written or printed.

Characteristics: the surface can be dry erase writing/heat transfer printing bar code; easily attached to the metal surface, easy to replace; can be used repeatedly, strong durability.

Applications:

Commodity price tags: Advertising and promotional displays; Safety warning signs Warehousing and logistics labels Vehicle-mounted identification

As technology advances, more and more magnetic products are appearing in the market.

Ferrite, NdFeB (Neodymium), and SmFeN (Samarium Iron Nitride) flexible rubber magnets are all classified as flexible magnetic materials, but they differ significantly in terms of magnetic strength, cost, heat resistance, and corrosion resistance.

Flexible Ferrite	Flexible NdFeB	Flexible SmFeN

Magnetic Strength:

• NdFeB Flexible Magnets

  The strongest type of flexible magnet. Even in small sizes, it provides high magnetic force, making it ideal for industrial applications.
  
  

• SmFeN Flexible Magnets

  Offers a balance between strength and cost. It has good magnetic performance and is more corrosion-resistant than NdFeB.
  
  

• Ferrite Flexible Magnets

  Has the weakest magnetic strength among the three, but it's sufficient for everyday use and the most cost-effective.

Heat and Corrosion Resistance:

• Ferrite Flexible Magnets:
  Good resistance to high temperatures and corrosion. Very durable.

• NdFeB Flexible Magnets:
  Sensitive to heat and may lose magnetic strength in humid or oxidizing environments.

• SmFeN Flexible Magnets:
  Better rust and corrosion resistance compared to NdFeB, making it a more stable and cost-effective choice.

Cost:

In summary:

• Choose NdFeB if you need strong magnetism.

• Choose Ferrite if you're looking for stability and low cost.

• Choose SmFeN if you want a balance between performance and durability.

Cold-rolled oriented silicon steel (CRGO) vs. Cold-rolled non-oriented silicon steel (CRNGO) : The difference between the "heart" and the "muscle" of power equipment.

In the core material field of power equipment - core materials, cold-rolled oriented silicon steel (CRGO) and cold-rolled non-oriented silicon steel (CRNGO) are like two key players each performing their own duties. Their core differences determine their respective irreplaceable application stages:

Grain orientation - The source of performance divergence:

CRGO (Orientation) : The internal grains are treated by a special process and are highly consistent in arrangement along the rolling direction. This enables it to have extremely high magnetic permeability and extremely low core loss in this direction, with outstanding magnetization efficiency.

CRNGO (non-oriented) : Its grain arrangement is random and disordered, and its magnetic properties are basically uniform in all directions, lacking the ultra-high performance of CRGO in a single direction.

Magnetic performance:

CRGO: It has the highest magnetic permeability and the lowest iron loss in the rolling direction (especially with significant advantages at high frequencies), making it an ideal choice for static equipment that pursues ultimate energy efficiency.

CRNGO: Its magnetic properties are isotropic. Although it is not as good as CRGO in a single direction, it excels in balanced performance across all directions and can adapt to scenarios where the magnetic field direction changes.

Application scenarios - Clear division of labor:

CRGO: Specifically designed for transformers (power transformers, distribution transformers, current/voltage transformers). Its low iron loss feature is crucial for reducing the no-load loss of transformers (which accounts for the majority of grid losses), and it can be called the "heart of transformers", contributing to global energy conservation.

CRNGO: Widely used in rotating motors that require magnetic field rotation or direction change, such as generators, electric motors (from small household appliance motors to large industrial motors), small transformers, relay cores, etc. Its uniform magnetic properties are the basis for the efficient operation of the "muscles of the motor".

Laminated iron cores play a crucial role in various electrical devices, significantly influencing equipment performance and efficiency. Constructed by stacking thin silicon steel or iron alloy sheets with insulation between layers, this unique structural design equips laminated iron cores with multiple functions, making them indispensable in transformers, motors, inductors, and other devices.

Reducing Eddy Current Losses Significantly

Based on the principle of electromagnetic induction, when an iron core is exposed to an alternating magnetic field, it generates an induced electromotive force, forming closed loops inside the core, resulting in eddy currents. Eddy currents cause the core to heat up, leading to energy loss and reduced device efficiency. By dividing the iron core into numerous thin sheets, laminated iron cores increase the resistance path for eddy currents. Due to the extreme thinness of each sheet, the eddy current flow is greatly reduced under the same induced electromotive force. For instance, in transformers, using laminated iron cores effectively reduces eddy current losses, enhancing electric energy transmission efficiency. Studies indicate that compared to solid iron cores, laminated iron cores can decrease transformer eddy current losses by orders of magnitude, significantly improving energy conservation during power transmission.

Optimizing Magnetic Performance Effectively

Materials like silicon steel inherently possess high magnetic permeability; however, in an alternating magnetic field, hysteresis can lead to energy loss. The laminated structure smoothens the flipping of magnetic domains in the core during magnetic field changes, reducing hysteresis losses. Additionally, the insulation layers between each sheet prevent lateral diffusion of magnetic flux, concentrating flux flow along the core's axial direction, enhancing magnetic permeability of the magnetic circuit, and strengthening electromagnetic induction effects. In motors, superior magnetic performance allows the motor to generate a more stable and stronger magnetic field during operation, increasing the motor's output torque and operational efficiency, ensuring the motor runs efficiently and reliably.

Enhancing Heat Dissipation Capability

The gaps between laminated sheets form natural heat dissipation channels. When equipment generates heat during operation, this heat dissipates more effectively through these gaps, helping lower the core's temperature, preventing performance degradation or damage due to overheating. For instance, in large generators, the excellent heat dissipation performance of laminated iron cores ensures that the generator maintains a stable operating temperature during extended high-load operations, enhancing the generator's reliability and lifespan.

Laminated iron cores, by reducing eddy current losses, optimizing magnetic performance, and enhancing heat dissipation capabilities, play an irreplaceable role in various electrical devices such as transformers, motors, and inductors. Their significance lies in improving equipment efficiency, performance, stability, as well as in achieving energy-saving and emission reduction goals. With ongoing technological advancements, the materials and manufacturing processes of laminated iron cores continue to evolve, promising to unleash even greater value across diverse fields in the future.

Laminated cores play a crucial role in electrical equipment. They are made by stacking thin silicon steel sheets or ferroalloy sheets and insulating them from each other. Its main purpose is to reduce eddy current losses and improve equipment efficiency. Take a transformer as an example. When alternating magnetic flux passes through the core, an induced electromotive force is generated. If the core is solid, a large eddy current will be formed, resulting in energy loss and core heating. The laminated core divides the core into thin sheets, confining the eddy current within a narrow circuit. The net electromotive force of the circuit is small, and the resistivity of the thin sheet material is high, effectively reducing the eddy current loss. In addition, laminated iron cores can also improve the magnetic field distribution, enhance the electromagnetic performance of the equipment, increase operational stability, and extend the service life of the equipment.

In an electric motor, laminated cores are equally important. It helps to reduce energy loss, improve motor efficiency, and enable the motor to convert electrical energy into mechanical energy more efficiently during operation. At the same time, it can also reduce the noise and vibration during the operation of the motor and improve the overall performance of the equipment.

In an electric motor, laminated cores are equally important. It helps to reduce energy loss, improve motor efficiency, and enable the motor to convert electrical energy into mechanical energy more efficiently during operation. At the same time, it can also reduce the noise and vibration during the operation of the motor and improve the overall performance of the equipment.

The adoption of laminated structure in transformer cores is a key design in electrical engineering, which is underpinned by profound physical principles and engineering considerations.

The challenge of eddy current loss

When alternating current passes through the windings of a transformer, a changing magnetic field is generated in the core. According to the law of electromagnetic induction, this changing magnetic field will induce a circular current inside the iron core, which is called "eddy current". If a single iron core is used, these eddy currents will cause a large amount of energy to be lost in the form of heat, not only reducing efficiency but also possibly causing the iron core to overheat.

Solution for laminated structure

This design can be made by stacking thin sheets of iron cores and coating each sheet with an insulating layer.

1.Significantly increase the resistance of the eddy current path

2.Limit the flow range of the vortex within a single thin sheet

3.Effectively reduce eddy current loss by over 90%

Material and process optimization

Modern transformers typically use silicon steel sheets with a thickness of 0.23 to 0.35mm. The addition of silicon further enhances the resistivity. The stacking direction is arranged along the magnetic field lines, which not only ensures the smoothness of the magnetic circuit but also minimizes the eddy current effect to the greatest extent.

This seemingly simple laminated design is actually the best solution to balance efficiency, cost and reliability, and remains one of the core technologies in transformer manufacturing to this day.

As energy efficiency and home comfort become top priorities for homeowners and OEMs alike, the demand for smart, reliable heating solutions is on the rise. At Shinhoo, we are proud to introduce GPA15-6F Circulating Pump, a high-performance circulator designed to meet the specific requirements of the North American market, with 110V compatibility and cutting-edge control features.

Designed for Modern Comfort Systems

Whether it's for a domestic heating system, hot water recirculation, or temperature-controlled pipeline, GPA15-6F delivers the performance and reliability that modern HVAC systems demand.

Its compact yet powerful design makes it the ideal solution for:

• Domestic heating systems
• Hot water circulation
• Temperature-controlled piping applications
• Stable & variable-flow heating
• Built for OEM Integration
• OEM partners will find GPA15-6F especially valuable thanks to its:
• Auto-Adaptive Control (AUTO Mode) for intelligent performance
• Delta-T Temperature Control to precisely match heating demands
• Ultra-quiet operation, perfect for indoor residential use
• High energy efficiency, helping to reduce overall system power consumption
• Easy installation and integration, saving time and cost in assembly lines

Engineered for North America

GPA15-6F is fully compatible with 110V power systems, making it an optimal solution for heating systems throughout North America, including the U.S. and Canada. It’s engineered with robust materials to ensure long-term reliability and reduced maintenance for end-users.

Partner with Shinhoo

At Shinhoo, we’re more than just a pump manufacturer—we’re a partner in your success. Our in-house R&D team is committed to delivering OEM-grade solutions that are easy to integrate, cost-effective, and backed by industry expertise.

At Shinhoo, quality is not an afterthought — it’s embedded in every step of our manufacturing process.

To support our growing base of European customers, OEM partners, and global distributors, we have invested heavily in precision testing technologies that guarantee every Shinhoo circulator pump meets and exceeds international standards.

Our in-house Testing Center,  equipped with the renowned Zeiss CONTURA Coordinate Measuring Machine (CMM), plays a critical role in ensuring product consistency, dimensional accuracy, and long-term reliability. Every pump component undergoes rigorous inspection — from initial design validation to final assembly checks.

“We believe precision is the foundation of performance. By implementing world-class quality control systems, we give our partners the confidence they need to trust Shinhoo as a long-term supplier,” said a senior engineer at Shinhoo.

This facility strengthens Shinhoo’s ability to:

• Support OEM customization with exacting tolerances
• Ensure compliance with EU regulations and certifications
• Deliver stable, efficient products for HVAC, plumbing, and renewable systems

We welcome OEM clients, agents, and trade partners seeking reliable, scalable, and high-quality circulator pump solutions to explore what Shinhoo can offer.