摘要
对我国生产的50余种农用塑料薄膜的规格、透光性能、保温性能及耐老化性能进行了分析,并根据我国的气候条件,对聚乙烯和聚氯乙烯棚膜的应用性能作了对比分析,指出了它们相应的使用条件和适用地区。介绍了一种评价我国现行各种棚膜的包括透光性、保温性和经济性在内的综合性能指标的模糊综合评判方法。对今后大棚覆盖材料的研究和生产提出了讨论意见。
More than 50 agricultural plastic films produced and used in China are tested and analyzed for their transmissivity of sunlight and long-wave radiation,as well as age-inhibit- ing properties.The performances of PE and PVC films used in defferent climate areas are investigated,and the suitable application areas are recommended.Fuzzy Synthetical Judge- ment is introduced to evaluate the plastic film synthetical performances,such as sun light transmissivity,thermal conservation,and costs.The future development trend is also dis- cussed.
关键词
塑料
塑料薄膜
透光率
保温性
green house
plastic film
light transmissivity
thermal conservation
