The compressive densification strain of honeycomb paperboard is one of the important parameters which affect the energy absorption property of honeycomb paperboard. The in-plane bearing mechanism of honeycomb paperboard in plastic zone was analyzed based on compression tests of the single row and multi-rows of honeycomb paperboard. The result indicates that the core layer plays a supporting role in resisting the buckling of the face layer. The double inner folds are formed in machine direction and the symmetrical inner folds are formed in cross direction in a honeycomb core. The core single wall and the face layer play a critical role in the load bearing in machine direction, and the core double walls, core single wall, and face layer all play critical roles in the load bearing in cross direction. On this basis, the evaluation equation of the compressive densification strain was obtained based on the energy absorption efficiency method and geometric scale effect, which are verified so that the experiment and test results are in good agreement.

It’s necessary to equip the ship cabins with suitable air purification device which can ensure the ship’s air quality without affecting the physical and mental health of the crew living in the limited space of a ship during ocean voyage. In this paper, zeolite’s characteristics and application in air purification are introduced, and three different types of air purification filters are designed with zeolite particles as main materials, then three development programs of air purification engineering machine for ship cabins are proposed based on modular design concept. The air-purifying machine models proposed in this paper have been trial-produced and tested, which provides new choices for ship cabins’ air-purifying devices.

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