| 摘要 |
<p>PROBLEM TO BE SOLVED: To efficiently heat and granule by drying a waste plastic, regulating its moisture content to a specific value or below, and then granulating the plastic by a die granulator. SOLUTION: The waste plastic 6 in which a film-like plastic is separated is comminuted in a suitable size by a comminutor 2, heater or dried by an air flow by a dryer 3, or wet gravity separated, then dehydrated, or a chlorine- containing plastic is separated by a centrifugal specified gravity separator and simultaneously dehydrated to regulate its moisture content to 20% or below. Then, the plastic is granulated by avoiding a closure in the die by a die type granulator 4 while eliminating melt insufficiency or an excess melting of the plastic. The film-like plastic separated from the plastic 6 is also similarly treated, and granulated by the granulator 4. Thus, closure of the granulator 4 can be avoided, no trouble of granulating fault occurs, and granules 5 of good quality can be continuously obtained. The film-like plastic can also be improved in its granulating efficiency.</p> |
