Abstract
The impact pressure occurred in new containers used for liquid products subjected to impact loads due to dropping was investigated, and compared with that of conventional paper containers. The new containers consist of a paper container with and without ribs and a liquid packaging bag and contain about 1000ml of water. The paper container and bag in the new containers were made of a sheet of recycled paper and a plastic film, respectively. The impact test with the bottom due to drop from a height of 0.25m to 1.5m was carried out. The impact pressure was measured using a pressure sensor. Results indicated that the maximum impact pressure occurred in the new containers was lower than that of the conventional containers. The impact pressure calculated by the water hammer theory was five times higher than that obtained from the experiment. However, the impact pressure calculated by the water hammer theory with modified pressure diffusion speed was the almost same as similar to that obtained from the experiment.
