The discussion about barrier effects of plastic materials has never died down in the past few years. The discussions about an obligatory deposit and the related debate about the introduction of a plastic bottle for beer as it has successfully been existing on the non-alcoholic beverage market, contribute to the topicality of the package plastic bottle. At the moment, there is a large number of different measuring methods and opinions existing on the optimum plastic material for returnable or non returnable plastic bottles.
      All authors who have dealt with the problems involved with permeation processes being therefore concerned with the suitability of plastic bottles for the beer bottling, however, have agreed on the fact that the gas permeation of oxygen and carbon dioxide still deserves further examination before a plastic material can be employed that on the one hand will meet the quality requirements and, on the other hand will not exceed the price limits