| 摘要 |
<p>A thermoplastic recycled polyolefin resin concrete and a preparation method thereof are provided to avoid the difference of mechanical strength on different location of the formed article and to prevent the internal stress due to uneven crystallization of polymer by extruding the composition as a pellet in order to prevent the deterioration of the article. A thermoplastic recycled polyolefin resin concrete comprises 35-66.9% by weight of recycled polyolefin resin, 15-40% by weight of fly-ash, 5-20% by weight of talc, 3-10% by weight of thermoplastic elastomer, 8-15% by weight of retardant, 2-5% by weight of glass fiber and 0.1-0.2% by weight of nucleating agent. A preparation method of the thermoplastic recycled polyolefin resin concrete comprises steps of: i) mixing 35-66.9% by weight of recycled polyolefin resin, 15-40% by weight of fly-ash, 5-20% by weight of talc, 3-10% by weight of thermoplastic elastomer, 8-15% by weight of retardant, 2-5% by weight of glass fiber and 0.1-0.2% by weight of nucleating agent in tumbler mixer; ii) extruding the mixture from step i) into a cylindrical shape continuously by twin screw extruder having screw size of 30-50mm and length/diameter of 36 at 210-230deg.C; iii) cooling the extruded product from step ii) with cooling water; and iv) cutting the cooled mixture into a pellet form by means of a pelletizer. Further, the cooled mixture has a cylinder shape of which a diameter is 2 to 5mm and a length is 3 to 6mm.</p> |
