news

Inductor coils are widely used in electrical appliances. “Reject high frequency and pass low frequency” is the most important characteristic of inductor coils. When high-frequency signals pass through the inductor coil, they will encounter greater resistance and are difficult to pass through, while low-frequency signals pass through the inductor coil. The resistance it presents is smaller. The resistance of the inductor coil to DC current is almost zero, but it has a significant hindering effect on AC current.

Generally speaking, the wires wound around the inductor coil have a certain resistance. Usually this resistance is very small and can be ignored. But when the current flowing through some circuits is very large, the small resistance of the coil cannot be ignored, because the large current will consume power on the coil, causing the coil to heat up or even burn out, so sometimes it must be considered The electrical power that the coil can withstand. It can be seen that the plastic coil frame is one of the key parts of electrical maintenance products.

What are the differences in the use of skeleton coils of different materials?
The materials used for the coil bobbin must meet the following requirements:
●Can withstand the maximum temperature of the coil
●Excellent insulation function
●Easy to process and form

Modified PBT is a good choice to make coil bobbin.

Features of specially modified PBT for coil bobbin:

1. High-grade flame-retardant general electronic products, in terms of material selection, pay special attention to their fire-proof properties. Selecting high-grade fire-proof materials is of great significance to improving product safety levels and preventing fires. Especially regarding the coil bobbin material, when the coil current surrounding the bobbin is too large, it will often cause the coil to heat up or even burn out. Materials that do not meet the flame retardant level will inevitably have certain safety hazards. Special modified PBT for coil bobbins can Reaching the 0.38mmV0 level ensures the safety of the coil bobbin for safe use.

2. High CTI relative leakage tracking index: the highest voltage value at which the material surface can withstand 50 drops of electrolyte (0.1% ammonium chloride aqueous solution) without causing leakage traces. Polymer insulation materials have special electrical damage phenomena, that is, the surface of polymer insulation materials will undergo electrical tracking degradation under specific conditions, and can lead to electrical tracking damage. Regarding products used in some electronic components such as coil bobbins, they have higher requirements for CTI value. The specially modified PBT for the coil bobbin not only has excellent flame retardancy, but also has excellent tracking index, which can reach 250V and has excellent safety performance.

3. General electronic products with high mechanical properties do not pay special attention to mechanical properties in the selection of materials. However, for some special parts, if the mechanical properties are insufficient, the parts will crack or become brittle, so customers are prohibited from using them. For defective products, it is of great significance to improve the mechanical function of the product.

4. High fluidity For a material, good fluidity means easy processing and molding, lower processing temperature, lower injection molding pressure, and lower energy consumption. Especially for “one mold with multiple holes” products such as relays, capacitor shells, and coil bobbins, choosing a material with good fluidity is more beneficial to injection molding to prevent the parts from being dissatisfied or defective due to lack of fluidity. shortcoming. Specially modified PBT for coil bobbins, with excellent fluidity and excellent processing properties.

If you are interested , please visit www.tclmdcoils.com and contact us for more details.