摘要
提出了一种聚乙烯流滴膜流滴持效期快速判断方法，即用表面润湿张力法测定流滴膜的表面张力来表征聚乙烯流滴膜的流滴性好坏。研究了薄膜样品表面张力随干燥时间、浸泡时间和温度的变化关系，确定了失效时的临界表面张力（34×10^-3N／m），得出其快速判定方法：在50℃的水浴中浸泡薄膜样品后，通过测试达到失效临界表面张力，比较薄膜样品浸泡时间的长短，可预测流滴膜的实际流滴持效期。经实验证明了表面润湿张力法测定流滴膜流滴性的科学合理性。
In this paper, a new test method for anti-fogging performance of greenhouse film of polyethylene based on the determination of surface tension was proposed. The relationship between the surface tension and time of invalidation was formulated. A critical surface tension （34 × 10^-3 N/m） was set, below which the film was considered as invalidating. During the test, the film was immersed in hot water at 50 ℃ and the time lasted for the surface tension of the film decreased below the critical value was measured, which was considered measure of the time of invalidation.
出处
《中国塑料》
CAS
CSCD
北大核心
2007年第2期86-89,共4页
China Plastics
关键词
流滴持效期
检测方法
聚乙烯流滴膜
anti-fogging time
testing method
anti-fogging polyethylene greenhouse film
