Foaming of wood-plastic composites (WPC) with a fine-celled structure can offer benefits such as improved ductility and impact strength, lowered material cost, and lowered weight, which can enhance their utility in many applications. With the aid of design of experiments (DOE) technique, we experimentally investigated the relationship between the materials/ processing parameters and the structure of WPC foams blown with physical blowing agents, which help elucidate the foaming behaviors under different conditions. Thereby, the material and processing conditions can be optimized to achieve the fine-celled structure of WPC foam in a cost-effective way.
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