As we all know, polyurethane is very versatile. At the same time, the factories of polyurethane foam produce a large amount of offcuts, mold spills, and waste products every year, as well as polyurethane waste in various fields need to be disposed. The recycling and reuse of these waste can not only reduce environmental pollution, but also conserve resources.

Bond molding technology

Bond molding is the most commonly used method of polyurethane recycling, the polyurethane is crushed into fine granules, then sprayed with a reactive polyurethane-based adhesive, mixed evenly and heated and pressurized. The recycled foam can be used as cushions and supports.

The biggest drawback of bond molding is the deterioration of the performance of recycled foam products. It is only suitable for low-grade parts such as furniture and automobile linings, with a narrow application surface, cumbersome process, large amount of labor, and low economic value.

Used as filler

Polyurethane regrind is used as filler in the production of polyurethane foam or other products. This method not only enables the recycling of waste polyurethane, but also reduces the cost of products effectively. For example, adding rigid polyurethane foam waste to concrete can reduce the density of concrete and increase the pores. The addition of polyurethane foam waste can reduce the weight of concrete by 29-36% at the same volume.