Abstract
Transportation tests by a freight car, from Fukuoka to Tokyo, were made to investigate the cause of deterioration of carton boxes of Citrus Unshu, and the data with respect to the shock of vibration, in-transit temperature and the increase of water-content of cartons during transportation were obtained.
1. The compressive strength of carton boxes used in the Fukuoka-district was lower than of the Saga district by about 76.8 percent and one of the reasons was attributed to the liner-paper used which was below the standard.
2. The printing design which crosses over the face of the carton such as used in the Fukuoka-district must be improved from the view point of compressive strength.
3. The temperature of cartons located in the center of the car was higher by 2.5 to 3°C than that of other boxes.
4. The shock of vibration acted on cartons in the freight car was severe in the upper part of loading, and th magnitude and occurrence of vibration were greater and more frequent in the following order: longitudinal, vertical and lateral direction.
5. The moisture content of carton boxes was 9.5 percent at the departure, whereas that at the destination (after 50 hours' transportation) was 18.1 percent for the carton filled with produce and 13.1 percent for the empty-carton.
6. Cartons loaded in the lower part of a freight-car resulted in a higher water-content of liners and lower compressive strength of boxes.
