| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a method and apparatus for separating a specific thermoplastic material in a high purity from waste plastics such as a scrapped car, a packaging material or the like. SOLUTION: In a method for successively classifying polyolefins (PE and PP) with a specific gravity of <1, which are classified by a specific gravity difference classification method, from a plastic material lowest in softening temperature by a softening temperature difference classification method, as cleared by a table 1 'the specific gravities and softening temperatures of various plastics', low density PE, medium density PE, high density PE + second class PP, third class PP and first class PP can be classified in the lower order of a Vicat softening point.</p> |
