A method of manufacturing a sound insulating material using a polyurethane foam from a foam for car seats and composition therewith which is produced by the method

摘要

A method for producing a sound insulating material, comprising: finely chopping a discarded car seat comprising polyurethane foam; mixing the resulting chopped polyurethane (PU) foam with a polyester fiber, a low-melting polyester fiber as a binding material, a polypropylene (PP) fiber, a thermoplastic fiber and hemp; carding the resulting mixture; needling the resulting material; thermoforming and cooling the resu andforming the resultant into a felt and then rolling it under heat and cutting the same, the low-melting polyester fiber as the binding material having a melting temperature of 130-180 ° C, the polypropylene fiber being contained in an amount of 20-25% by weight and the hemp Is contained in an amount of 10-15% by weight.