Self bonding copper winding wires allow fixing coils without varnishing. Moreover, coil winding is possible while applying methanol and ethanol. 

a. SB-EIW Self Bonding Enamelled Copper Wire

SB-EIW copper winding wire has a self bonding overcoat of PolyAmide over PolyesterImide bond coat. The solder reflow after coil winding causes only slight coil deformation due to heat from the reflow furnace. They have a temperature index of 180°C (H Class) and is widely used in auto electricals and home appliances.

Type	Enamel Used	Temperature Index	Standard (Cu)	Advantages	Operational Precautions	Applications
SB-EIW	Polyesterimide + Self bond wire	180°C	IEC 60317-37	Coils can be fixed without varnishing. Coil winding is possible while applying methanol and ethanol. Solder reflow after coil winding causes only slight coil deformation due to heat from reflow furnace.	Store wires in a cool, dark place away from heat and moisture.	1. Coils for flat motors 2. Clutch coils

 

b. SB-EIW-AIW Self Bonding Enamelled Copper Wire

SB-EIW-AIW copper winding wires come with a self bonding overcoat of PolyAmide over dual bond coats of PolyesterImide and PolyAmideImide. These copper magnet wires can be bonded tightly together by heat produced with current flow or by heating in a thermostatic chamber. They have a temperature index of 180°C, 200°C (H+ Class / K Class). These features make these copper winding wire best suited for usage in auto electricals, motors and home appliances.

Type	Enamel Used	Temperature Index	Standard (Cu)	Advantages	Operational Precautions	Applications
SB-EIW-AIW	EIW + AIW + Self bond wire	180°C 200°C	IEC 60317-38, MW 102-C	Coils can be fixed without varnishing. Wires can be bonded tightly together by heat produced with current flow or by heating in a thermostatic chamber. Coil winding is possible while applying methanol and ethanol.	Store wires in a cool, dark place away from heat and moisture.	Coils

 

c. SB-UEW Self Bonding Enamelled Copper Wire

SB-UEW copper winding wires come with a self bonding coat of PolyUrethane and PolyAmide (Self Bonding). Only slight coil deformation happens due to heat from the reflow furnace after coil winding. They come with a temperature index of 130°C, 155°C, 180°C (B Class) and are widely used in auto electricals, home appliances and industrial motors. 

Type	Enamel Used	Temperature Index	Standard (Cu)	Advantages	Operational Precautions	Applications
SB-UEW	Polyurethane + Self bond wire	130°C	IEC 60317-2, MW 130-C	Coils can be fixed without varnishing.Coil winding is possible while applying methanol and ethanol. Solder reflow after coil winding causes only slight coil deformation due to heat from the reflow furnace.	Store wires in a cool, dark place away from heat and moisture.	1. Coils for flat motors 2. Clutch coils.
SB-UEW	Polyurethane + Self bond wire	155°C	IEC 60317-35, MW 131-C
SB-UEW	Polyurethane + Self bond wire	180°C

 

d. SB-PUPEI Self Bonding Enamelled Copper Wire

This self bonding PUPEI copper winding wire comes with a PolyAmide self bonding overcoat over solderable PolyEsterImide. They have a temperature index of 180°C (H Class) and is widely used in switchgears. 

Type	Enamel Used	Temperature Index	Standard (Cu)	Advantages	Operational Precautions	Applications
SB-PUPEI	Solderable PEI +  Self bond wire	180°C	IEC 60317-36	Coils can be fixed without varnishing. Coil winding is possible while applying methanol and ethanol.	Store wires in a cool, dark place away from heat and moisture.	1. Coils for flat motors 2. Clutch coils

4. Poly Vinyl based Copper Winding Wires

a. PVA Enamelled Copper Wire

PVA Copper winding wires come with a PolyVinylAcetal enamel coating. They have strong mechanical coating and good flexibility. They have good thermal shock resistance and quite strong in hydrolytic degradation. They have a temperature index of 120°C (A Class) and is widely suited for transformers. 

Type	Enamel Used	Temperature Index	Standard (Cu)	Advantages	Operational Precautions	Applications
PVA	Poly Vinyl Acetal	120°C	IEC 60317-1	Mechanically strong coating and good flexibility. Good thermal shock resistance. Strong in hydrolytic degradation.	Crazing prone (Preheating prevents crazing from developing.)	Transformer

 

b. PVF Enamelled Copper Wire

This is a copper winding wire with PolyVinylFormal enamel coating with a lower temperature index of 105°C (A Class). The properties of this copper magnet wires are very similar to PVA – good flexibility, strong mechanical coating, good thermal shock resistance and strong in hydrolytic degradation making it highly suited for transformers.  

Type	Enamel Used	Temperature Index	Standard (Cu)	Advantages	Operational Precautions	Applications
PVF	Poly Vinyl Formal	105°C	IEC 60317-12, MW 15-C,  JIS-3202-2	Mechanically strong coating and good flexibility. Good thermal shock resistance. Strong in hydrolytic degradation.	Crazing prone (Preheating prevents crazing from developing.)	Transformer

 

5. Self Solderable or Polyurethane based copper winding wires

Self solderable copper winding wires come with a solderable enamel layer that allows soldering without stripping off the coating. You can solder them directly, thus increasing your production efficiency.

a. UEW Solderable Enamelled Copper Wire

UEW Solderable copper winding wire comes with a solderable PolyUrethane coating. They have excellent electrical characteristics with high frequency. They have a temperature index of 130°C, 155°C, 180°C (B Class). Due to their remarkable properties, they are widely used in auto electricals, home appliances, electronics, switchgears, refrigeration, and air conditioning. 

Type	Enamel Used	Temperature Index		Standard (Cu)	Advantages	Operational Precautions	Applications
UEW	Polyurethane Enamelled wire	130°C	IEC 60317-4, MW 75-C,		Soldering is possible without stripping off coating.  Excellent electrical characteristics with high frequency.	Coating is mechanically weak. Vulnerable to aromatic solvents. Crazing prone. (Preheating prevents crazing from developing.)	1. Coils for electronic equipment. 2. Coils for communication equipment. 3. Coils for electric meters. 4. Micromotors 5. Magnet coils
UEW	Polyurethane Enamelled wire	155°C	IEC 60317-20, MW 79-C, JIS 3202
UEW	Polyurethane Enamelled wire	130°C		IEC 60317-51, MW 82-C,

 

b. NY-UEW Enamelled Copper Wire

 

These are solderable copper winding wire that comes with a PolyUrethane and PolyAmide Nylon enamel coating. They have good surface slip characteristics and suitable for automated winding. This special nylon coated solderable copper winding wires come with temperature indices of 130°C, 155°C and 180°C (B Class). They are ideal for usage in motors, home appliances, air conditioning and fans. 

Type	Enamel Used	Temperature Index		Standard (Cu)	Advantages	Operational Precautions	Applications
NY-UEW	Polyurethane + Nylon wire	130°C	IEC 60317-19, MW 28-C		Good surface slip characteristics; suited for high-speed machine winding. Good thermal shock resistance. Has all advantages of UEW wire	Poor resistance to hydrolytic degradation; care must be taken when used in sealed equipment.	1. Coils for electronic equipment. 2. Coils for communication equipment. 3. Coils for electric meters. 4. Micromotors 5. Magnet coils
NY-UEW	Polyurethane + Nylon wire	155°C	IEC 60317-21, MW 80-C
NY-UEW	Polyurethane + Nylon wire	180°C		IEC 60317-55, MW 83-C,

 

c. PUPEI Solderable Enamelled Copper Wire

PUPEI solderable copper winding wires come with a solderable PolyEsterImide coating. They have excellent electrical characteristics with high frequency and are widely used in switchgears and defence equipment. They have a temperature index of 180°C (H Class). Their soldering temperature is higher than normal solderable enamels.

Type	Enamel Used	Temperature Index	Standard (Cu)	Advantages	Operational Precautions	Applications
PUPEI	Solderable PEI wire	180°C	IEC 60317-23, MW 77-C,  JIS-3202	Soldering is possible without stripping off coating.  Excellent electrical characteristics with high frequency.	Soldering temperature is higher than normal solderable enamels	1. Switchgear industry 2. Defence equipment

 

 

d. NY-PUPEI Enamelled Copper Wire

These are solderable copper winding wires which makes making terminal connections easy. Made with an enamel coating of solderable PolyEsterImide and PolyAmide Nylon, these wires have excellent surface slip characteristics making them suited for high speed machine winding. They have good thermal shock resistance too and have all other properties of PUPEI wires. These solderable nylon copper winding wires have a temperature index of 180°C (H Class) and are widely used in the switchgear industry.

Type	Enamel Used	Temperature Index	Standard (Cu)	Advantages	Operational Precautions	Applications
NY-PUPEI	Solderable PEI + Nylon wire	180°C	MW 78-C	Good surface slip characteristics; suited for high-speed machine winding.  Good thermal shock resistance. Similar advantages to PUPEI.	Poor resistance to hydrolytic degradation; care must be taken when used in sealed equipment.	1. Coils for flat motors 2. Clutch coils

 

6. Self Lubricating Copper Winding Wires

Self-lubricating copper winding wires comes with a special self-lubricating overcoat. This imparts better scrape resistance and offers lower friction co-efficient, thus irradicating the problems in high-speed winding.  

a. SL-EIW-AIW Self Lubricated Enamelled Copper Wire

The SL-EIW-AIW copper winding wires come with multiple enamel coats of PolyEsterImide, PolyAmideImide and a self lubricating overcoat of PolyAmideImide. This offers excellent surface slip characteristics and mechanical strength, making them suitable for high space factor motors. They have a temperature index of 200°C (H+/K Class) and are used in auto electricals, home appliances, industrial motors, Railways, defence equipment, transformers, fans, pumps, refrigeration and air conditioning.

Type	Enamel Used	Temperature Index	Standard (Cu)	Advantages	Operational Precautions	Applications
SL-EIW-AIW	EIW + AIW + Self lubricating PAI	200°C. 220°C	IEC 60317-13, MW 35-C, MW 73-C JIS-3202	Excellent surface slip characteristics and mechanical strength; suited for high space factor motors.  Similar advantages to EIW-AIW.	Film detachment is difficult.	1. High space factor motor 2. Freon motors 3. Motors for electrical equipment

 

Those are the types of copper winding wires widely used. [Read More: Special Features of Premium Copper Winding Wires to improve Winding Efficiency]

For a precise match of technical specifications, winding wire manufacturing must follow the best processes under strict quality control. Partnering with an experienced copper winding wire manufacturer who can understand your needs, exactly match the specifications and supply without any geographical constraints is the need of the hour.  [Also Read: An Ultimate Buying Guide for Enamelled Copper Wires]

 

GEEKAY as a Copper Winding Wire Supplier for your manufacturing needs

GEEKAY Winding Wires is a market leader in aluminium and copper winding wires. Our experience spans more than four decades and we have 4 manufacturing units spread across the Indian subcontinent. 

We use state-of-the-art machinery and source raw materials from the best suppliers. We use high-grade electrolytic copper with more than 99.99% purity. Further, we are actively working on reducing our carbon footprint to help you achieve your net zero goals. 

To begin an everlasting partnership, contact us today with your sample specifications.