Disposal system for plastic

A plastic treating system comprising:

• a crushing apparatus for crushing a composite plastic mainly formed by a plastic as a main material;
• a dry cleaning apparatus for applying a mechanical impact force and frictional force to crushed pieces crushed by the crushing apparatus;
• a removing apparatus for removing metal pieces from the cleaned crushed pieces;
• and
• a selecting apparatus for selecting the crushed pieces into various kinds of plastics by utilizing a difference in a specific gravity of the crushed pieces from which the metal pieces are removed.

A plastic treating system comprising:

• a crushing apparatus for crushing a composite plastic mainly formed by a plastic as a main material;
• a dry cleaning apparatus for applying a mechanical impact force and frictional force to crushed pieces crushed by the crushing apparatus;
• an air separation apparatus for removing crushed pieces having a small specific gravity among the cleaned crushed pieces by an air force;
• and
• a selecting apparatus for selecting the crushed pieces into various kinds of plastics by utilizing a difference in a specific gravity of the crushed pieces obtained by the air separation.

A plastic treating system comprising:

• a crushing apparatus for crushing a composite plastic mainly formed by a plastic as a main material;
• a dry cleaning apparatus for applying a mechanical impact force and frictional force to crushed pieces crushed by the crushing apparatus;
• an air separation apparatus for removing crushed pieces having a small specific gravity among the cleaned crushed pieces by an air force;
• a removing apparatus for removing metal pieces from the crushed pieces obtained by the air separation;
• and
• a selecting apparatus for selecting the crushed pieces into various kinds of plastics by utilizing a difference in a specific gravity of the crushed pieces from which the metal pieces are removed.

A plastic treating method comprising:

• a crushing process of crushing a composite plastic mainly formed by a plastic as a main material;
• a cleaning process of cleaning crushed pieces crushed in the crushing process;
• and
• a selecting process of selecting the crushed pieces into various kinds of plastics by utilizing a difference in a specific gravity of the cleaned crushed pieces,
• wherein there is further provided a process of cleaning each of said processes at a time of switching the composite plastic material to be treated to another composite plastic being different in both or one of a color and a material.