Enameled wire is an indispensable material in modern society such as vibrant electrical appliances, electronic machines, motors, transformers, relays and even automotive parts. Chalco has various types of enameled wires, including enameled aluminum wire, enameled copper wire, enameled copper clad aluminum wire, high-tension wire, magnetic wire, stranded wire, etc. Chalco's special enameled flat wire is suitable for high-precision coils and has won the trust of soldiers.
155 grade self bonding enamelled copper wire
Self-adhesive enameled wire is made by adding a layer of self-adhesive paint film on the insulating paint film of general enameled wire. Various self-adhesive enameled wires produced by the combination of different insulating paint films and self-adhesive paint films are suitable for various purposes.
Self bonding magnet wire is a layer of self-bonding coating on polyurethane, polyester or polyesterimide enameled wire. The self-bonding layer can produce adhesion characteristics by high temperature or solvent. The winding wire can become a self-bonding tight coil through the bonding effect of the self-bonding layer. In some applications, the skeleton, tape and impregnating varnish can be omitted, which can reduce the coil volume and processing cost, and has the advantages of production and environmental protection. Our company can make many kinds of self-bonding wires according to various insulating coatings and self-bonding layers. At the same time, we can also provide self-bonding wires of different conductor materials, such as self bonding copper wire, copper-clad aluminum self-bonding wires, alloy enameled wires, etc. Please select the right wire according to the usage and usage.
Characteristic of 155 grade self bonding enamelled copper wire: Fast drying speed, low softening temperature; Solvent self-adhesive type, excellent bonding performance
Applications of 155 grade self bonding enamelled copper wire: Instrument coil, speaker, micro motor, sensor, smart card coil, head coil
Product internal structure
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self bonding solutions |
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Types |
Advantages |
Disadvantages |
Risks |
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Hot air self-bonding: hot air is in the winding process by blowing hot air on the line to achieve self-bonding effect. The temperature of hot air at winding is usually between 120 ℃ and 230 ℃, which depends on wire diameter, winding speed and winding shape and size. This method is suitable for most applications. |
1. Fast 2. Stable and easy to process 3. Easy to automate |
Suitable for thin wire only. |
Tool pollution |
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Oven self-bonding: oven self-bonding is achieved by putting the coil of finished product into the oven for heating. According to the shape and size of the coil, the temperature of the oven usually needs to be between 120 ℃ and 220 ℃, and the time required is 5 to 30 minutes. Due to the long time required, oven self-bonding may be uneconomical for some applications. |
1. It can be suitable for post baking heat treatment 2. Suitable for multilayer coils |
1. High cost 2. Long time operation. |
Tool pollution |
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Solvent self-bonding: solvent self-bonding is to achieve self-bonding effect by adding appropriate solvent (such as industrial alcohol) to the wire during winding. The solvent can be brushed, sprayed or coated on the winding during winding. The typical recommended solvent is ethanol or methanol (the concentration is 80-90%). The solvent can be diluted with water, but the more water is used, the more difficult the self-bonding process will be. |
The equipment and process are simple |
1. Solvent emissions 2. Not easy to automate |
1. Residual solvents may damage the insulation 2. It is difficult to dry the inner layer of the coil with more layers. It is usually necessary to use an oven to completely volatilize the residual solvent after self-bonding |
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Power on self-bonding: power on self-bonding is realized by electric current (resistance heating). The required current intensity depends on the shape and size of the coil. Power on self-bonding is recommended for products with wire diameter greater than 0.10 mm (38awg), but special care should be taken not to overheat the center of the winding, as excessive temperature may damage the insulation and cause short circuit. |
1. Fast process and high energy efficiency 2. Easy to automate |
1. It is difficult to find a suitable process 2. Not suitable for specifications below 0.10 mm |
The application of excessive current will cause the temperature to be too high |
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General Introduction |
Heat resistance |
Electrician value |
Mechanical behavior |
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IEC Standard/ NEMA |
IEC 60317-35/MW 131-C |
Temperature index (°C) |
155 |
Film continuity(according to IEC 60851-5.1) |
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Elongation |
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0.05mm(typical) |
20% |
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0.25mm(typical) |
35% |
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Tensile strength |
220-300 [N/mm²] |
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1 paint film |
≤8 |
Self sticking performance |
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2 kinds of paint film |
≤6 |
Solvent bonding |
Limited/Suitable/Not suitable |
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3 paint films |
≤5 |
Recommended solvent |
Ethanol/methano/No |
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Insulation type |
Polyurethane |
Cut through temperature |
≥200℃ |
Breakdown voltage (at temperatures of 20 & deg; C and relative humidity of 35%) |
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Recommended bonding temperature |
120～140℃ |
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Resoftening temperature |
≥130℃ |
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Self-adhesive layer type |
Polyvinyl butyral/ Polyamide |
Heat shock |
≥175℃ |
0.05mm Typical value |
150 V/µm |
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0.25mm Typical value |
100 V/µm |
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Diameters available |
0.016～0.60 |
Solderability |
Pinhole characteristics (according to JIS C3003.6 standard) |
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Pinhole after stretching (non-standard） |
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Solderability |
2.0s/395℃ |
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Storage condition |
Non-hygroscopic/Hygroscopicity |
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1 paint film |
≤3 |
1 paint film |
≤3 |
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2 kinds of paint film |
≤5 |
2 kinds of paint film |
≤5 |
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3 paint films |
≤8 |
3 paint films |
≤8 |
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