The miscibility and the PSA (pressure sensitive ahesives) perfbnnance (l80°peel strength, probe tack and holding power) of acrylic copolymer/ disprcportionated rcsin systems were investigated. And the PSA performance was measured over a wide range of time scale and temperature. The influence of the viscoelasticity of PSA on the rheological characteristics of PSA perfblmance was discussed. A range of the miscibility became smaller as the tackifler was bulkler (as the Tg of the tackifier increases,or as the Tg of the bend system increases). In case of miscible blend systems, the viscoelasticity (the storage modulus, the loss modulus) shifted toward higher temperature-lower frequency and at the same time the PSA performance shifted toward lower rate side along the X (rate)-axis as the tackifier was bulkier. We found a few systems where a single Tg could be measured in spite of the fact that two phases were observed mlcmscopically. The PSA perfomance of such systems shifted toward lower rate side along the Ｘ (rate)-axis as the Tg increases just as the case of miscible blend systems.

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There are some countermeasures against cargo shifting. But the quantitative evaluation of cargo motions in the oscillating force and the effect of the countermeasures are not cleared. This paper deals with the characteristics of cargo shifting in response to seismic motion and external oscillating forces occurring transportation. Some basic physical model tests using actual palletized corrugated cartons are carried out, and complex movements under one dimensional horizontal inertia force are shown by the results. New shifting parameters of the palletized cargo are proposed. The quantitative displacement of cargo shifting can be indicated by the area load movement parameter which is derived from the size of a corrugated carton and unit load size．

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A simple method is proposed to detennine a gas permeability of polymeric films. Carbon dioxide gas was introduced into film packaging and packages were placed in an air-tight container. Head space gas in the container was regularly analyzed using gas chromatography. The initial void volume in packaging was calcu]ated by the equilibrated gas concentration in the container. The gas permeability of the films was calculated using computer simulation that fitted calculated gas concentrations to experimental data by a least squares method. Siｍulated values were in exellent agreement with those obtained with a conventional manometer. The method developed is useful in determining the gas penneability of polymeric films because it doesn't need to use special equipments, measure the initial void volume of packaging and inject a syringe into packaging．

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