| 摘要 |
<p>PROBLEM TO BE SOLVED: To utilize used thermoplastic resin moldings more effectively than previously and at the same time, create circumstances where the user is able to use the thermoplastic resin moldings which have always a sufficient function. SOLUTION: A chopping board made of a thermoplastic resin manufactured by a maker P is sold to a customer through a retail store Q. The customer R swaps his used chopping board for a new one at a lower than regular price for trading. The maker P estimates the use conditions for the sold chopping board and notifies the customer of the arrival of time for the swap of the chopping board when its life is about to expire. Further, the maker P cleans the old chopping board bought back through the swap and removes the soiled surface by cutting and grinds the old chopping board after cleaning or the removal of the soiled surface to obtain a material for the chopping board. Thus the new chopping board is molded by reusing the ground material. The removed cuttings are utilized, for example, as an auxiliary fuel at an ironworks and the like.</p> |
