The present invention provides a highly heat-resistant flame-retardant nylon foam material and its preparation method, pertaining to the field of polymer foam materials. The process comprises the following steps: The first component is fed into a twin-screw extruder for thorough mixing, followed by melting and plasticizing, kneading and compounding, extrusion, cooling, pelletizing, and drying to produce a primary product ready for foaming; The primary product is mixed with a foaming agent, dried, and processed into a second component; Feed the second component into a single-screw extruder. Extrude the material through a sheet die, cool, shape, and cut to obtain primary micro-foamed nylon sheets; Place the primary micro-foamed nylon sheets into a supercritical fluid foaming press. Employ the supercritical fluid foaming process to produce high heat-resistant, flame-retardant nylon foam material; This material achieves UL94 (1.6mm) V0 flame retardancy, exhibits an expansion ratio of 8–15 times, possesses excellent mechanical properties, shows no post-shrinkage, and features smooth, fine cell structure.
Country Code: CN
Application Number: CN202310586930.9
