It is very suitable for the self-digestion of waste materials in flexible foam production plants. For polyols with fillers, the first need The problem to be considered is its fluidity, and the increase in viscosity is mainly related to the proportion of recyclates added and the characteristics and particle size of the finely ground particles. Then we must consider its impact on product performance.

Studies have shown that when the added amount of the recycled material does not exceed 10%, the physical properties of the prepared soft foam are very small compared with the conventional foam, and have little relationship with the particle size of the recycled material. However, with the increase in the amount of recyclate and the increase in particle size, the viscosity of the polyol will increase sharply, which may cause problems such as difficulty in the mixing head of the foaming machine, excessive mixing pressure, and uneven injection of the combined material into the mold.

This method of recycling waste polyurethane foam must improve the foaming equipment. Extrusion molding Extrusion molding uses thermodynamics to transform the molecular chain in the soft polyurethane foam into a medium-length chain and transform the foam material into a soft plastic material. This material is suitable for plastic products with high strength and high hardness, but not high requirements for tensile and elongation at break.

The specific method is to crush the foam into powder, blend it into thermoplastic polyurethane, and make it in an extrusion molding machine. It uses injection molding to manufacture shoe soles and other products. The German Bayer company has done research in this area. This method is suitable for recycling limited waste products and is not suitable for large-scale recycling. Polyurethane foam recycling, rigid foam, high temperature resistant foam The product type and use of polyurethane foam and the application of carbon fiber composite materials in wind turbine blades

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