| 摘要 |
PROBLEM TO BE SOLVED: To provide a returnable box which is obtained by the in-mold foam molding of polypropylene-based resin foaming particles, and from which sticking stains and molds are easily cleaned out.SOLUTION: The amount of eluted components at 40°C or less is set to be 7.5 wt.% or less, in a cross fractionation chromatography method of a returnable box foam molded article. Thereby, a returnable box from which sticking stains and molds are easily cleaned out is obtained. |
