It is common for customers to conpare silicone rubber heaters and polyimide heater, which is better？
In response to this question, we have compiled a list of characteristics of these two types of heaters for comparison, hoping these can help you:
A. Insulation layer and temperature resistance:
1. Silicone rubber heaters have an insulation layer composed of two pieces of silicon rubber cloth with different thicknesses (typically two pieces of 0.75mm) that have different temperature resistance. Imported silicone rubber cloth can withstand temperatures up to 250 degrees Celsius, with continuous operation up to 200 degrees Celsius.
2. Polyimide heating pad have an insulation layer composed of two pieces of polyimide film with different thicknesses (typically two pieces of 0.05mm). The normal temperature resistance of polyimide film can reach 300 degrees Celsius, but the silicone resin adhesive coated on the polyimide film has a temperature resistance of only 175 degrees Celsius. Therefore, the maximum temperature resistance of polyimide heater is 175 degrees Celsius. The temperature resistance and installation methods may also vary, as the adhered type can only reach within 175 degrees Celsius, while mechanical fixation can be slightly higher than the current 175 degrees Celsius.
B. Internal heating element structure:
1. The internal heating element of silicone rubber heaters is usually manually arranged nickel-chromium alloy wires. This manual operation may result in uneven spacing, which can have some impact on heating uniformity. The maximum power density is only 0.8W/square centimeter. Additionally, the single nickel-chromium alloy wire is prone to burning out, resulting in the entire heater being rendered useless. Another type of heating element is designed with computer software, exposed, and etched on iron-chromium-aluminum alloy etched sheets. This type of heating element has stable power, high thermal conversion, uniform heating, and relatively even spacing, with a maximum power density of up to 7.8W/square centimeter. However, it is relatively expensive.
2. The internal heating element of polyimide film heater is usually designed with computer software, exposed, and etched on iron-chromium-aluminum alloy etched sheets.
C. Thickness:
1. The standard thickness of silicone rubber heaters in the market is 1.5mm, but this can be adjusted according to customer requirements. The thinnest thickness is around 0.9mm, and the thickest is usually around 1.8mm.
2. The standard thickness of polyimide heating pad is 0.15mm, which can also be adjusted according to customer requirements.
D. Manufacturability:
1. Silicone rubber heaters can be manufactured into any shape.
2. Polyimide heater are generally flat, even if the finished product is in another shape, its original form is still flat.
E. Common characteristics:
1. The application fields of both types of heaters overlap, mainly depending on the user's requirements and cost considerations to determine the appropriate choice.
2. Both types of heaters are flexible heating elements that can be bent.
3. Both types of heaters have good wear resistance, aging resistance, and insulation properties.
In summary, silicone rubber heaters and polyimide heater have their own characteristics and advantages. Customers can choose the most suitable heater based on their specific needs.
Post time: Oct-07-2023
