Degradable waterproof oilproof coating on food packaging paper

The invention discloses a degradable waterproof oilproof coating on food packaging paper. The coating is composed of modified chitosan, montmorillonite and a fluorine-silicon organic matter, wherein the modified chitosan is carboxymethyl chitosan; the montmorillonite and the fluorine-silicon organic matter are combined to form a hydrophobic surface layer; and a weight ratio of the modified chitosan to the montmorillonite to the fluorine-silicon organic matter is (5-10): (5-10): 1. Because the coating does not contain a laminating film, time and energy are not consumed for treating the laminating film in the recycling process, so benefits are greatly improved; and the food packaging paper formed by coating base paper with the coating has more excellent characteristics in the aspect of an environmental protection function. 一种食品包装纸上的可降解防水防油涂层由改性壳聚糖、蒙脱土、氟硅有机物构成；所述的改性壳聚糖为羧甲基壳聚糖；所述的蒙脱土与氟硅有机物结合形成疏水表面层；所述的改性壳聚糖、蒙脱土、氟硅有机物的重量比为（5-10）：（5-10）：1；本发明由于不包含淋膜，所以回收再利用过程中不用花费时间、能源处理淋膜，大大提高效益；本发明涂布于底纸上形成的食品包装纸，在环保功能上有着更优越的特点。