论文部分内容阅读
上世纪80年代,国内食品市场上各式碳酸软饮料、热灌装饮料、矿泉水、食用油、调味类、酒类、果酱等产品的包装几乎全部使用可回收玻璃瓶,而现在已被品种繁多的塑料瓶、二片易拉罐、三片易拉罐、纸塑铝复合软包装等新型材料所取代。尤其是PET塑料瓶的市场需求增长非常快,现已占据国内饮料包装市场的主要份额。由于外包装阻氧性能的好坏直接影响产品的货架期,对其透氧性能进行标准化测试的要求十分迫切。传统的透氧性测试方法是将材料制成片材进行试验,而制成瓶后,瓶体各处厚薄
80s of last century, the domestic food market all kinds of carbonated soft drinks, hot drinks, mineral water, cooking oil, seasonings, alcohol, jams and other products almost all of the packaging of recyclable glass bottles, and now has a wide variety Plastic bottles, two cans, three cans, aluminum-plastic composite paper and other new materials replaced. In particular, the market demand for PET plastic bottles is growing very fast and now occupies the major share of the domestic beverage packaging market. Outer packaging oxygen barrier performance directly affects the product shelf life, the oxygen permeability of its standardized test requirements are urgent. The traditional oxygen permeability test method is to test the material into a sheet, and made of bottles, the bottle around the thickness