Physical Blowing Agent Polyurethane Microcellular Foaming Technology: A Comprehensive Overview

introduction polyurethane (pu) microcellular foams are versatile materials widely used in diverse applications, including automotive parts, footwear, seals, and thermal insulation. their unique properties, such as low density, high strength-to-weight ratio, excellent energy absorption, and thermal insulation characteristics, stem from their microcellular structure, characterized by a large number of small, closed cells. the creation of this structure hinges on the foaming process, where a blowing agent…