| 摘要 |
PURPOSE:To manufacture a large, porous molded product or molded products of various shapes by processing a specified mixture in the order of the mold heating, low speed rotating process, the cooling, high speed rotation process and the cooling, low speed rotation process when the mixture is rotational molded. CONSTITUTION:100 parts by weight of a crosslinking polyolefin crushed material or 100 parts by weight of a thermoplastic resin crushed material containing 20 parts by weight or more of filler to 100 parts by weight of resin is used. Then, 0-200 parts by weight of a polyolefin group thermoplastic resin crushed material is mixed therein. Said mixture is processed by the rotational molding method in the order of the mold heating, low speed rotation process, the cooling, high speed rotation process and the cooling, low speed rotation process. Thus, a porous hollow molded product having an inner wall surface of uniform voids and pulled little can be molded. Thermoplastic resin containing crosslinking polyolefin should be crushed to around 2-100 meshes. Olefin group thermoplastic resin may not be added, but the addition of the same improves physical properties such as mechanical strength and the like. |
