• Sew Magnet

Sew Magnet

Sew Magnet is a small permanent magnet assembly specially designed for apparel, textiles, and fabric products.  It can replace traditional fastening methods such as zippers, buttons, and Velcro. Sew Magnet is widely used in apparel, home textiles, medical textiles and outdoor products.

  • 01.Parameter
  • 02.Features & Applications
  • 03.Characteristic
  • 04.OEM/ODM
  • 05.Solution
  • 06.FAQ
  • 07.Contact
Product Name
Sew Magnet
Magnet Material
Sintered NdFeB
Magnet Shape
Disc, Square, Strip
Magnet Size
Diameter/Length: 5-20 mm
Magnet Thickness
1-5 mm
Magnetization Direction
Axial (Through Thickness) / In-plane
Magnet Type
Isotropic / Anisotropic
Casing Material
Polyester Blend Fabric, Silicone, TPU, Heat-shrinkable Plastic
Casing Thickness
0.3-1.5 mm
Casing Color
Black, White, Custom Dyeable Options
Holding Force
0.2-2 kg per pair
Surface Magnetic Flux Density
100-300 mT
Operating Temperature
-30℃ to 80℃ (Fabric Casing); -40℃ to 120℃ (Silicone Casing)
Wash Resistance
Up to 60℃ Standard Grade; 95℃ Industrial Grade
Sewing Holes
2-4 holes per magnet
Sewing Hole Diameter
1-2 mm
Flexibility
≥90° bending without casing cracking
Adhesive Option
Acrylic or Silicone-based adhesive backing
Customization
Available

Grade Category
Grade Example
(BH)max (MGOe)
Holding Force (per pair)
Casing Material
Features & Applications
Standard Grade
N30 – N35
30 – 35
0.2 – 1 kg
Fabric or basic plastic
Light-duty applications (children's clothing, crafts)
High-Force Grade
N40 – N45
40 – 45
1 – 2 kg
Reinforced casing (nylon or silicone)
Heavy fabrics (denim, outerwear) or industrial textiles
Medical/Child-Safe Grade
Custom
Custom
Custom
Hypoallergenic silicone or organic cotton
No small parts, passed skin irritation tests (ISO 10993); compliant with CPSC children's product safety standards
Washable Grade
Custom
Custom
Custom
Heat-sealed TPU casing
Machine washable (50+ cycles at 60°C), resistant to detergent and fabric softener chemicals

Sew Magnet is widely used in:
Apparel & Fashion: Magnetic closures for jackets, coats, dresses, and accessories (handbags, hats); hidden fasteners for seamless garment designs; adjustable fit components (waistbands, cuffs).
Home Textiles: Curtain tiebacks, cushion covers, bed linens, and decorative fabric panels; reusable sewing fasteners for quilting and craft projects.
Medical Textiles: Compression garments, orthopedic braces, and adaptive clothing for elderly/disabled users; easy-on/off closures for patients with limited mobility.
Outdoor Gear: Tent flaps, backpacks, and outdoor clothing (waterproof variants with sealed silicone casing); quick-release fasteners for sports equipment.
Children's Products: Reversible clothing, educational toys, and safety bibs (child-safe, no small detachable parts).

Hidden Fastening — No Zippers, No Buttons
Sew Magnet replaces traditional zippers, buttons, and Velcro with a concealed magnetic closure. NdFeB magnetic core integrates into fabrics for quick open/close while keeping a clean look. Compact size (5-20mm diameter, 1-5mm thickness) adds no bulk to lightweight textiles.

Strong Magnetism in a Small Size
Sintered NdFeB delivers 0.2-2kg holding force per pair — much stronger than ferrite. Surface flux density reaches 100-300mT for reliable closure without sacrificing flexibility or comfort.

Flexible Shapes for Various Textiles
Available in disc, square, and strip shapes. Casing options include polyester blend, silicone, TPU, and heat-shrinkable plastic. Bends ≥90° without cracking — ideal for fabrics that move and flex.

Washable and Long-Lasting
Standard fabric casing withstands washing up to 60°C. Industrial-grade silicone or TPU casing supports up to 95°C for frequent cleaning and extended use.

OEM/ODM customization options include:
Magnet Design Customization: Customize magnet shape, size, thickness, and magnetic performance according to application needs.
Casing Material Customization: Select polyester fabric, silicone, TPU, heat-shrinkable plastic, or other protective materials.
Appearance Customization: Customize casing color, fabric appearance, and product integration method.
Washing Performance Customization: Develop standard washable versions or industrial-grade washable solutions.
Application-Specific Design: Optimize magnetic strength and structure for different textile thicknesses and product requirements.
Packaging Customization: Provide retail packaging, bulk packaging, and industrial packaging solutions.
For OEM customers, suppliers can support the complete process from product design, prototype development, testing, and mass production.


Packaging

For consumer packaging, Sew Magnet is usually packed in blister cards or resealable plastic bags. Each package typically contains 5-20 pairs and includes product size, holding force, washing instructions, safety warnings, and sewing guidelines.

For bulk orders, Sew Magnet pairs are packed in cardboard boxes with dividers. Typical packaging quantities range from 100-500 pairs per box. Tissue paper or non-magnetic separation materials are used to prevent magnets from sticking together, and moisture-resistant packaging with desiccants can be provided.

For industrial packaging, vacuum-sealed bags with pallet packaging are available for large-volume orders. Batch information, casing material certification, and quality inspection reports can be provided according to customer requirements.

Safety packaging options include child-resistant packaging for small magnets with safety labels such as “Keep away from pacemakers” and “Not for children under 3 years”.

Mishma Industry (Shanghai) Co., Ltd.

Replacing Traditional Fasteners with More Flexible Solutions
Traditional buttons, zippers, and Velcro may require complex operation or affect product appearance. Sew Magnet provides a hidden magnetic closure solution that improves convenience while maintaining a clean design.

Meeting Lightweight Product Design Requirements
Many textile products require lightweight accessories that do not affect comfort. Sew Magnet uses compact NdFeB magnets with strong magnetic performance, allowing manufacturers to achieve reliable fastening without adding heavy components.

Improving Product Differentiation
For apparel and textile manufacturers, customized magnetic closures can help create unique product designs and improve market competitiveness.

Solving Washing and Durability Concerns
Different textile products require different washing conditions. By selecting suitable casing materials such as TPU or silicone, Sew Magnet can meet different durability requirements.

1. What is a Sew Magnet?
Sew Magnet is a small NdFeB magnetic component designed to be integrated into fabric products through sewing or adhesive bonding. It provides reusable magnetic fastening functionality for textile applications.

2. Can Sew Magnet be washed in a washing machine?
Yes. TPU or silicone-cased Sew Magnet models can support machine washing at ≤60℃. Specific washing performance depends on casing material and product design.

3. Can manufacturers customize Sew Magnet for OEM projects?
Yes. Suppliers can customize magnet size, magnetic strength, casing materials, colors, packaging, and application structures according to customer requirements.

4. How strong is the magnetic force of Sew Magnet?
The holding force depends on magnet grade and design. According to available specifications, Sew Magnet can provide 0.2-2kg holding force per pair.

5. What information should buyers provide for quotation?
Buyers should provide product application, required magnetic strength, magnet size, textile material, washing requirements, quantity, and packaging requirements.

6. Will the magnet core fall out from the casing?
High-quality Sew Magnet products use stitched or heat-sealed protective structures to secure the magnet core and prevent separation during normal use.

7. Is Sew Magnet safe for skin contact?
For products requiring direct skin contact, medical-grade silicone or organic cotton casing options can be selected. Nickel-sensitive users should avoid direct contact with nickel-plated surfaces.

8. Is Sew Magnet suitable for mass production?
Yes. Sew Magnet is commonly supplied for OEM textile production and can support customized designs, quality inspection, and large-volume manufacturing.

9. Can Sew Magnet be used in medical textile products?

Yes. Medical textile applications can use specialized casing materials and protective coatings according to product requirements.

10. How should Sew Magnet be installed into fabrics?

For sewing applications, manufacturers should sew around the magnet edge rather than through the magnet core. Adhesive-backed versions can also be used for non-sewing applications.

About Us
Mishma Industry (Shanghai) Co., Ltd.
Mishma Industry (Shanghai) Co., Ltd.

Mishma Industry (Shanghai) Co., Ltd. was founded in 2011, with more than ten years of production and manufacturing experience, a total area of more than 10000 m2, complete magnet manufacturing equipment and testing equipment, and five production lines for the production of various magnets, including Bonded NdFeB, Sintered NdFeB, Sintered Ferrite, Rubber Magnet, AlNiCo, SmCo, etc.

 

Our products take lead in terms of the consistency of magnetic property, dimensional accuracy, rust-proof treatment and more.Our company has established a standardized modern enterprise system, as well as a sound management structure, and has passed multiple management system certifications.

 

All the time, we have been making great efforts in providing customers with environmentally friendly magnetic products featuring stable capacities and higher cost performance, to become the world′s most competitive supplier of magnetic materials.

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