PBT release film and preparation method and application thereof

• Main Authors: WANG NINGYU, MAO LISHA, CHEN PENG, YUAN WENBO
• Format: Patent
• Language: Chinese; English
• Published: 18.04.2023
• Subjects: AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; CHEMISTRY; COMPOSITIONS BASED THEREON; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR; ELECTRICITY; GENERAL PROCESSES OF COMPOUNDING; LAYERED PRODUCTS; LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT ORNON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; PERFORMING OPERATIONS; PRINTED CIRCUITS; 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; WORKING-UP

The invention discloses a PBT release film as well as a preparation method and application thereof, and belongs to the technical field of release film materials. The PBT release film comprises a first surface layer, a middle layer and a second surface layer, the total thickness of the first surface layer, the middle layer and the second surface layer is 110-130 [mu] m, the thickness of the first surface layer is 20-25 [mu] m, and the thickness of the second surface layer is 4-7 [mu] m; the preparation raw materials of the first surface layer and the second surface layer are pure PBT, and the preparation raw material of the middle layer is modified PBT. According to the asymmetric three-layer PBT release film, on the basis of the total thickness of a conventional PBT release film, the thickness of one surface layer meets the release requirement, the thickness of the other surface layer is reduced, and the thickness of the middle layer is increased, so that the release property can be improved, the glue resista