Supporting body and application thereof

• Main Authors: ZHOU HUI, HUANG LIMING, LIN JIANHUA, LI YING, ZHOU GUANGDA, ZHANG CHENPING, CHEN ZHUYU
• Format: Patent
• Language: Chinese; English
• Published: 03.03.2023
• Subjects: AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING; CHEMISTRY; COMPOSITIONS BASED THEREON; LAYERED PRODUCTS; LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT ORNON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM; MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; PERFORMING OPERATIONS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR; SHAPING OR JOINING OF PLASTICS; THEIR PREPARATION OR CHEMICAL WORKING-UP; TRANSPORTING; WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL

The invention belongs to the technical field of membrane materials. The invention discloses a supporting body which is used for preparing a polyimide film and comprises a supporting layer and a release layer, the release layer is arranged on at least one side of the supporting layer, and the release layer comprises polyimide; the thermal expansion coefficient difference value between the release layer and the supporting layer is 0-8 ppm/K; the peel strength between the polyimide film and the release layer is smaller than that between the release layer and the supporting layer. The invention also discloses an application of the support body, the support body is used for preparing a polyimide film, and the preparation method comprises the following steps: coating the polyimide precursor composition on one side of the release layer of the support body to form a film, carrying out imidization treatment to obtain the polyimide film, and separating the polyimide film from the support body to respectively obtain the