参考资料：
1.https://www.webmd.com/food-recipes/features/cookware-plastics-shoppers-guide-to-food-safety#1
2.https://www.livestrong.com/article/530191-clear-plastic-wrap-food-safety/
3.http://polymerdatabase.com/Films/Plastic Films2.html
4.https://www.fsai.ie/faqs/cling_film_safety.html
5.《GB 9685-2016 食品安全国家标准 食品接触材料及制品用添加剂使用标准》
