单翼迷宫式滴灌带抗热氧老化性能的影响研究

单翼迷宫式滴灌带产品新国家标准中增加了氧化诱导时间（OIT），这对产品的抗热氧老化性能提出了要求。本文从滴灌带配方出发，讨论了产品原料与其OIT的料效关系，结果表明，防老化母料的加入比例对滴灌带的OIT影响最大，增加其比例可增大滴灌带的OIT；高密度聚乙烯（PE?HD）的加入比例对滴灌带的OIT影响大于线性低密度聚乙烯（PE?LLD）和低密度聚乙烯（PE?LD）的加入比例，增加PE?HD比例、减小PE?LLD和PE?LD比例可增大滴灌带的OIT；PE?LD的加入比例对滴灌带OIT的影响最小，在配方设计时应综合使用比例合理的PE?HD、PE?LLD、PE?LD以满足滴灌带良好的加工和其他性能要求；防老化母料中稳定剂比例不应随成本而减少，稳定剂比例增大时，滴灌带的OIT增大；通过对滴灌带的熔体质量流动速率（MFR）、炭黑含量及OIT指标测试，得出滴灌带MFR和炭黑含量与其OIT无明显的相互变化关系。

Influence of Drip Tape with Labyrinth on One Side on Thermal Oxidation Aging Resistance

The oxidation induction time （OIT） has been included in the new national standard for the drip tapes with labyrinth on one side. This brings new requirements for resistance to thermal and oxygen aging of the products. Based on the formulation of drip tapes， this article discusses the material?efficiency relationship between the raw materials for products and their OIT. The weight fraction of anti?aging master batch has the greatest impact on the OIT of drip tapes. The OIT of drip tapes can be improved through increasing their ratios. The addition amount of PE?HD can generate a much greater influence on the OIT than those of PE?LLD and PE?LD. The OIT of drip tapes can be improved by increasing the weight fraction PE?HD in the raw materials. Moreover， the reduction of the weight fraction of PE?LLD and PE?LD can lead to an increase in the weight fraction of PE?HD. The weight fraction of PE?LD had the least impact on the OIT. A reasonable weight fraction of PE?HD， PE?LLD， and PE?LD should be adopted through formula design to meet the requirements for good processing and other performance of drip tape. The weight fraction of stabilizer in the anti?aging master batch should not be reduced in spite of its cost. The OIT of drip tapes increases with an increase in the weight fraction of stabilizer. Through the characterizations of melt flow rate （MFR）， carbon black content and OIT of drip belt， it was concluded that there was no obvious relationship between the MFR， the content of carbon black and OIT of drip tapes.