Film heating module and production method thereof

Abstract

The invention discloses a film heating module and a production method. The method comprises the steps that a conductive heating polyimide film is adopted, a copper foil electrode is laid on the conductive heating polyimide film, and polyimide bonding resin fills between the copper foil electrode and the conductive heating polyimide film through net-shaped small holes to firmly fix copper foil on the conductive heating polyimide film; hot-pressing insulating packaging layers are laid on the two sides of the conductive heating polyimide film laid with the copper foil electrodes in a stacked modein a sandwich mode, wires are led out of the copper foil electrodes in a welded mode, and packaging and insulating are conducted at the welded positions. According to the film heating module, an integral module form of insulated packaging, energization, heating and high temperature resistance is completed, the copper foil electrode and the conductive heating polyimide film are in tight and comprehensive contact, the electrical contact between the copper foil electrode and the conductive heating polyimide film is ensured, the film heating module has a good thermal radiation effect and good insulativity, and the film is rapid in heating and temperature rise, large in heating area, uniform in heating temperature, high in thermoelectric efficiency and safe to use.

Description

technical field [0001] The invention relates to a thin film heating production technology, in particular to a thin film heating module including a hard heating module or a flexible heating module and a production method thereof. Background technique [0002] Chinese patent CN101699920B discloses a method for preparing a polyimide heating film. This polyimide heating film uses nano-conductive metal powder and nano-conductive carbon powder to polymerize with polyimide resin to prepare a conductive film. Print on the film or directly use conductive copper foil as the positive and negative electrodes, and then compound polyethylene terephthalate or polyetheramide or polyimide insulating film on both sides of the conductive film for protection. In this patent application, conductive metal powder is used in the heating film, and it is not clear whether there is a conductive adhesive or no conductive adhesive between the copper foil and the heating film. It is not clear how to bon...

AI Technical Summary

Problems solved by technology

[0003] Chinese patent CN109714837A discloses a graphene electrothermal film, which is composed of a first insulating protective layer, a radiation shielding layer, a heating layer, a reflective heat insulating layer and a second insulating protective layer, and the heating layer is printed on a graphene heating sheet It is composed of a conductive circuit. From the analysis of the public information, it is impossible to form a sheet by spraying only the slurry consisting of graphene powder, conductive carbon powder, carbon nanotubes, conductive amalgam and far-infrared mineral materials. Even if the sheet material base material is selected in addition, it is difficult to realize the printing of the conductive circuit on the sprayed layer because there is no solidified material in the composition, so from the published data, the heating layer cannot realize its heating purpose and the the desired technical effect

In this patent, polyimide resin is selected as the insulating layer, but it is not clear whether it has bonding properties

The aluminized polyimide film also has no bonding performance, how the four layers are bonded together, and the processing technology of how the four layers are bonded together is not clear. The patent disclosure is not sufficient, the disclosure content is vague and unclear, and the purpose of the invention cannot be achieved