聚丙烯非织造布拒水整理对葡萄套袋微环境的影响

为提高普通聚丙烯(PP)非织造布拒水性以及获取果实套袋对生长微环境影响状况等信息,以水性聚氨酯(PU)为交联剂,用氟系拒水剂对PP非织造布进行拒水整理,通过正交试验分析拒水剂质量浓度、交联剂质量浓度、浸润时间、焙烘温度对整理后拒水效果、透气率、透光率、断裂强力的影响,并得出最优整理工艺。用非织造布制袋并进行葡萄套袋下田试验,测量果袋内外日均光照强度、温度、湿度,探究拒水PP套袋对果袋内微环境和葡萄果实品质的影响。结果表明,影响拒水整理的因素主次排序及最佳工艺分别为:焙烘温度130℃;拒水剂质量浓度40 g/L;浸润时间10 min;水性PU质量浓度3 g/L。整理后PP果袋拒水性提高60%。

Influence of water repellent finished polypropylene nonwoven fabric nonwoven fabric on micro environment of grape bagging

In order to improve water repellency of polypropylene ( PP) nonwoven fabric and investigate the influence of bagging microenvironment on growth situation, PP nonwoven fabric with water repellent finishing was prepared using the waterborne polyurethane as crosslinking agent in combination with fluorine based water repellent agent. By orthogonal experiments analysis, the influence of water repellent concentration, crosslinking agent concentration, soaking time and curing temperature on water-repellency , ventilation property and light transmittance were studied and the optimal finishing process was obtained. By bagging experiment for grape in the fields, the light intensity, temperature and humidity of grape fruit bag were measured inside and outside, and the influence of PP nonwoven bags of water repellent finishing of fruit microenvironment on grape fruit quality were investigated. The results show that the primary and secondary factors and the optimal processing of water repellent finishing are curing at 130 ℃, water repellent concentration of 40 g/L , soaking time of 10 min and crosslinking agent of 3 g/L. Water repellent performance of the PP nonwoven grape bag increases by 60%.