| 摘要 |
<p>PURPOSE: A luminous polyurethane chip and its preparation method are provided, to suppress the environmental pollution by recycling waste polyurethane. CONSTITUTION: The method comprises the steps of collecting waste polyurethane scraps, separating them by color, and removing the impurities adhered to the separated waste polyurethane scraps; pulverizing the prepared scraps into a certain size; adding 2-5 kg of stearic acid as a melting agent, 1-10 kg of a luminous pigment, 1-3 kg of a flame retardant, 0.1-1 kg of titanium dioxide as a decolorizing agent and 10-30 kg of heavy calcium carbonate to 100 kg of the pulverized waste polyurethane scraps with stirring, and extruding the mixture; and cutting the extruded polyurethane into a size of 3-10 mm.</p> |
