液体农药软包装的研究现状及展望

摘要

液体农药因含有毒性较大且腐蚀性较强的甲苯、二甲苯等有机溶剂,其软包装材料应具备较强的耐腐蚀性能和阻隔性能。目前国内市场上液体农药软包装常用的材料主要有PET/Al/CPP（或PE）复合膜、PET/VMPET/CPP（或PE）复合膜、含PA或EVOH的PP,PE多层共挤膜、PET/PVDC（或EVOH）/CPP（或PE）透明复合膜等,常用的胶黏剂为聚氨酯胶黏剂。液体农药包装废弃物的处理一般采取随意丢弃和集中填埋焚烧2种方式,均对环境及人类健康危害较大,必须采取相应的措施以降低其危害。液体农药软包装必须朝绿色环保方向发展,研发并推广可降解材料与水溶性膜。%There exist high toxic and strong corrosive organic solvents such as methylbenzene and dimethylbenzene in liquid pesticide,therefore materials used in packaging pesticide should have strong anti-corrosive and high barrier property.At present,common flexible materials in domestic market mainly include PET/Al/CPP（or PE）,PET/VMPET/CPP（or PE） dry laminated films,PP or PE coextrusion film including PA or EVOH and PET/PVDC（or EVOH） /CPP（or PE） transparent film.Meanwhile polyurethane adhesive is often used.Discarding and dumping in landfills and burning are two main ways for waste disposal,which are detrimental to environment and physical health and some appropriate measures should be taken.In future,researching and developing degradable materials and water soluble film is a green and environmental-friendly way to liquid pesticide packaging.