Production process of polyimide heater


Polyimide heating film, also known as PI heating film, is widely used in many industries such as electronics, aerospace, and medical equipment. These films are made from a material called polyimide, which is known for its high temperature resistance, electrical insulation and mechanical strength. In this article, we will discuss the production process of polyimide heating film, which consists of several steps.


Step 1: Coating and Lamination


Polyimide resin is then coated onto the substrate using a variety of techniques, and the connection between the polyimide heating sheet and the wire head is covered with silicone. The thickness of the coating is typically in the range of 10-50 microns, depending on the desired application. The coated substrate is then laminated with a release liner to protect the coating during subsequent processing steps. The base material of polyimide heater has excellent thermal stability and electrical insulation properties.


Step 2: Patterning and Etching


The polyimide film is then patterned and etched using photolithography or other techniques to create the desired circuits or features. This process involves the application of a photoresist material, exposure to a patterned UV light source, and subsequent etching of the exposed areas to create the desired features.


polyimide film

Step 3: Transparent Conductive Layer


The conductive layer is sandwiched between two layers of polyimide film, and the conductor in the middle can avoid the effect of short circuit and also reduce the footprint and weight. The conductor of the polyimide flexible heater determines the ultimate resistance and power that the heater can achieve, so the conductor is critical in the heater. But there are many types of conductors, such as brass, cupronickel, 304 stainless steel, and red copper.


Step 4: Application of Heating Element


Finally, a heating element is applied to the polyimide film to generate a heating function. Combining these thin film resistance elements or printed circuits with the heating sheet, if the customer is worried that the temperature is too high, a temperature control switch can also be installed on the polyimide heating sheet, so that the temperature can be controlled, and the heating can be stopped when the temperature is too high , depending on specific application requirements. Heating elements are often coated with a protective coating to increase durability and prevent damage during use.


In the production of the product, we will also check the quality of the product, which is called: quality control. Quality control involves a variety of tests, including visual inspection, electrical testing, and thermal testing. These tests are performed to ensure that the polyimide heating film has the required properties such as high temperature resistance, electrical insulation and mechanical strength.


To sum up, during the production process, every step is critical to ensure that the polyimide heating film meets the required specifications and functions properly in the application. The use of high-quality materials, precise processing and strict testing are the keys to the production of polyimide heating film. By carefully controlling key parameters, Best Technology can produce high-quality polyimide heating films to meet the needs of various industries and applications. If you have needs for heating sheets, you can contact us to buy!