Research And Development Of Expanded Perlite Buffering Cushion

EPS and EPE are used widely in buffering cushion. Their capabilities are perfect, and they are very cheap .The processings are simple, but they can't degrade ,so it is difficult to callback them. That results in environment pollution .The development of EPS and EPE is disturbed by green barrier and energy sources crisis. It is a trend that there is no pollution in packaging materials. In the item, using expanded perlite's low density, no pollution and cheapness, we add no polluted bond and appropriated vesicant to perlite, and then put the mixture of them into mould after being mixed up adequately. The mixture loses water and agglutinates by heated. At the same time, it foams, forms and shapes .In this paper, the problems in packaging materials and development on environment-friendly materials are summarized. On the basic, appropriated bond and vesicant are selected by experiments. On this basis, we did experiments about foaming, forming and shaping. The mechanism is discussed and contrasted with that of foam. The effects of bond, vesicant, pressure on density of the cushion are discussed. On this basis, The components and the proportion of the mixture are ensured through experiments. The static and dynamic compressing, creep and rebound are tested. In order to estimate fairly the capabilities of the cushion, the results are compared with those of EPE, EPS and honeycomb paperboard. The cushion has the same buffering property as that of EPE. The small electronic products can be packaged by the cushion.