Copper Foil

Your Professional Copper Foil Supplier

Hangzhou Weshare Import & Export Co.,Ltd. is a leading Chinese manufacturer and exporter of transformer components, electrical insulation materials and consulting company. Weshare founded in 2005 by one specialized sales in transformer accessories. Most of our products are used in oil and dry transformers, electrical motors, generators and electronic products.Our mission is to ensure appropriate product quality while satisfying the needs of our customers is our prime objective and represents the core principle of our business activities.

Conductive Copper Rods For Transformers
Copper Foil Winding (ASTM B152 standard) refers to high-purity cold-rolled copper with a copper content of ≥99.9%, H65/H68 state (hardness optional), thickness 0.05-3mm, width ≤600mm...
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T2 Copper Busbar
Copper Foil Winding (ASTM B152 standard) refers to high-purity cold-rolled copper with a copper content of ≥99.9%, H65/H68 state (hardness optional), thickness 0.05-3mm, width ≤600mm...
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High Purity Copper Foil
Conductivity: ≥100% IACS (international annealed copper standard), measured resistivity 1.724×10⁻⁸Ω·m (silicon steel resistivity is about 4.6×10⁻⁷Ω·m, 28 times worse conductivity).
Current...
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Why Choose Us

Quality Assurance

Certified by UL, SGS, and ISO9001, Weshare upholds stringent quality standards.

Extensive Experience

Weshare, since 2005, excels in transformer accessories and electrical engineering.

Export markets

With a strong focus on export markets, we have successfully captured significant market share in East Asia, North Europe, the Middle East, South America, Egypt, and East Africa. Our dedication to ensuring appropriate product quality while meeting customer needs is the cornerstone of our business philosophy.

Product Application

Our company boasts a wide array of products used in oil and dry transformers, electrical motors, generators, and electronic devices.

Advantages of Copper Foil

Excellent conductivity

Copper foil is known for its excellent conductivity, which can effectively reduce the resistance loss of the transformer and improve the energy transfer efficiency. Copper foils are particularly widely used in high-power transformers.

High thermal conductivity

Copper foil has excellent thermal conductivity, which can quickly dissipate the heat generated during the operation of the transformer and maintain the stable operation of the transformer. This is important for preventing coil overheating and extending the service life of the transformer.

Good flexibility and plasticity

Copper foil has excellent flexibility and plasticity, which can adapt to the winding needs of the complex shape of the transformer's low-voltage coils and ensure the accuracy and quality of the windings.

Specification

Performance Indicators	Data	Testing Standards	Competitor Comparison
Copper Purity	≥99.95%	GB/T 5231	Competitors generally ≤99.9%
Tensile Strength	Soft state ≥200MPa, Hard state ≥350MPa	ASTM E8/E8M	Competitors' hard - state strength ≤300MPa
Surface Roughness	Ra≤0.8μm (mirror finish)	ISO 4287 Certification	Competitors' Ra≥1.6μm
Electrical Conductivity	≥58MS/m (IACS 100%)	ASTM B193	Competitors ≤56MS/m
Dimensional Tolerance	Thickness ±0.005mm, Width ±0.1mm	GB/T 17793	Competitors' tolerance is 30% larger

Manufacturing Process

Raw material

High-purity raw materials received.

Dissolving

Process of producing electrolyte for making foil by melting raw materials in the electrolyte solution.

Plating

Process of producing copper foil of uniform thickness by plating Cu ion on drums in electrolyte solution.

Slitting & Sheeting

Slitting in the width direction of the copper foil according to customer demand size.

Inspection

Process of packing and shipping after stringent quality inspection.

Features of Copper Foil

High Conductivity: Copper Foil offers excellent electrical and thermal conductivity, making it essential in electronic devices, batteries, and thermal management systems.

Flexibility: Copper Foil is highly malleable and flexible, making it ideal for use in flexible electronics, wearable devices, and packaging applications.

Corrosion Resistance: Copper Foil is resistant to corrosion, which increases the durability and longevity of products in which it is used.

Durability and Strength: Despite its thin form, Copper Foil is strong enough to withstand mechanical stress, making it suitable for heavy-duty applications.

Versatility: Copper Foil is used in a wide range of industries,including electronics, automotive, energy storage, and packaging, offering versatile solutions to modern industrial challenges.

Application of Copper Foil

Electrical equipment: Copper foil is used in the production of electrical equipment such as wires, connectors, and circuit boards. For example, copper foil is used to make wire harnesses for automobiles, which are responsible for transmitting electricity throughout the vehicle. Copper foil is also used to make circuit boards for computers and other electronic devices, which are responsible for directing and controlling the flow of electricity within the device.

Medical devices: Copper foil is used in the production of medical devices such as defibrillators, pacemakers, and electronic stethoscopes. For example, copper foil is used to make the electrodes that are placed on a patient’s chest during defibrillation, a life-saving procedure used to restore a normal heartbeat. Copper foil is also used to make the leads that connect pacemakers to a patient’s heart, and it is used in the construction of electronic stethoscopes, which use electronic sensors to amplify and filter sound waves.

Consumer electronics: Copper foil is used in the production of consumer electronics such as smartphones, laptops, and tablets. For example, copper foil is used to make the printed circuit boards that are responsible for directing and controlling the flow of electricity within these devices, and it is used to make the connectors and cables that connect different components within the device. Copper foil is also used to make the antennae that allow these devices to communicate with wireless networks.

Aerospace and defense: Copper foil is used in the production of aerospace and defense systems such as radar and communication systems. For example, copper foil is used to make the printed circuit boards that are responsible for directing and controlling the flow of electricity within these systems, and it is used to make the connectors and cables that connect different components within the system. Copper foil is also used to make the antennae that allow these systems to communicate with other devices.

FAQ

Q: What are the advantages of copper foil?

A: Copper foil is quite sturdy owing to its good mechanical strength. Its biggest advantage is the absence of resonance in thermal region. It behaves as a pure 1/v-detector, all the way up to about 300 eV.

Q: What do you use copper foil for?

A: The versatility of copper foil, including its ability to conduct both heat and electricity, make it a popular industrial material in everything from batteries to solar equipment.

Q: Is copper foil real copper?

A: Copper foil is a thin sheet of copper metal that is widely used in various applications due to its excellent electrical conductivity, malleability, and corrosion resistance.

Q: What size copper foil should I use?

A: Foil width You might be inclined to select foil that creates skinny lines, however they are not as strong. That's because you can't apply as much solder. For most projects, you'll find 7/32” copper foil will be suitable, however if you vary the width of the foil it will add more depth.

Q: Is copper foiling safe?

A: The only hazards associated with copper foil as shipped are the potential for cuts from sharp edges. SKIN: As produced in foil form, the potential for cuts exists due to sharp edges of the metal. EYES: Dust may irritate eyes. INHALATION: Dust may cause irritation to respiratory tract.

As one of the leading copper foil suppliers in China, we warmly welcome you to wholesale high-grade copper foil made in China here from our factory. All our products are with high quality and competitive price.