It has simple process and low investment

Posted by AdvancedMaterial on July 23rd, 2021

After mixing evenly, Put the glue sprayed foam into a mold for molding, and cure at room temperature for 12 hours according to an appropriate compression ratio, or keep it at 150° C. for 40 minutes to obtain the finished product. The obtained recycled foam can be used as low-grade parts such as packaging, automobile lining, carpet lining, and support. Recycling polyurethane foam by bonding and press molding is the simplest and most mature method among all recycling methods.

It has simple process and low investment, and is suitable for small and medium-sized enterprises. According to reports, in the United States alone, more than 200,000 tons of soft foam waste is crushed and bonded into recycled foam each year. Europe also mostly produces re-bonded foam products from leftovers from the production of lumpy flexible foam and cushion foam for old cars, sofas, beds, and seats. ICI Polyurethane produces carpet linings from used car seat cushions. In 1997, Toyota Motor Corporation of Japan used recycled foam of old car seat cushions to crush and bond them as sound insulation materials.

The tensile strength, Wholesale Polymethacrylimide Foam tear resistance, and elongation at break of recycled products recovered from this bonding press molding have decreased greatly, while the hardness has increased. In addition, due to the poor surface finish of the recovered products, it is only suitable for Areas with low requirements for tensile properties and surface properties.

The waste soft polyurethane foam used as a filler is screened and cleaned to completely remove the metal impurities that may contain, then crushed into particles with a particle size of about 3mm, and then crushed at low temperature or using a two-roll grinding room temperature grinder The powder is 180-300? Zm, and then the powder is added as a filler to the new flexible foam composition. This not only recycles waste foam plastics, but also reduces the cost of new products. It is economically and technically feasible.