Multilayer polymer foam material and preparation method thereof

• Main Authors: GUO BINGJIE, PANG YONGYAN, ZHENG WENGE, CAO YIYU
• Format: Patent
• Language: Chinese; English
• Published: 26.10.2021
• Subjects: AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING; LAYERED PRODUCTS; LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT ORNON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM; PERFORMING OPERATIONS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR; SHAPING OR JOINING OF PLASTICS; TRANSPORTING; WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL

The invention relates to a multilayer polymer foam material and a preparation method thereof. The preparation method comprises the following steps: providing a first polymer and nanoparticles, and mixing the first polymer and the nanoparticles to obtain a mixture; providing a second polymer, preparing lamellar structure from the second polymer and the mixture through a multi-layer co-extrusion method, wherein the lamellar structure comprises at least one second polymer layer and at least one mixed layer, and the second polymer and the first polymer are polymers with the same monomers; and foaming the lamellar structure to make the mixed layer in the lamellar structure foamed to form a foaming layer, and obtaining the multilayer polymer foam material comprising at least one thin film layer and at least one foaming layer. The preparation method disclosed by the invention is simple, and the obtained multilayer polymer foam material has no internal defects and has excellent optical and electromagnetic shielding,