How many kinds of plastic materials are there for household goods?How to identify it?How about performance?
Usually plastic products have a triangle symbol, most of them at the bottom of the plastic container.There are 1-7 digits in the triangle. Each number represents a kind of plastic container."1" PET: mineral water bottles, carbonated beverage bottle bottles don't cycle use hot water use: heat resistant to 70 ℃, only suitable for the warm drink or beverage, with high temperature liquid, or heating is easy to deformation, have RongChu harmful substances.What's more, scientists have found that after 10 months of use, the no. 1 plastic may release the carcinogen DEHP, which is toxic to the testicles.HDPE no. 2: cleaning products, incomplete cleaning of bath products is not recommended for reuse: these containers can be reused after careful cleaning, but these containers are usually not easy to clean, leaving the original cleaning products to become a hotbed of bacteria, preferably not recycled."No. 3" PVC: it is seldom used in food packaging at present. It is best not to buy it.Use: this material is easy to produce harmful substances at high temperature, even it will be released in the process of manufacturing. When poisonous substances enter the human body with food, they may cause breast cancer, birth defects of newborn babies and other diseases.At present, the containers of this material are less used for packaging food.If used again, never let it get hot."4" LDPE: cling film, plastic film and other plastic wrap don't wrapped in food into the microwave oven use: surface heat resistance is not strong, in general, the qualified PE cling film in the hot melt phenomenon occurs when temperature over 110 ℃, can leave some of the human body cannot decompose plastic preparation.When food is heated by wrapping it in plastic wrap, the grease in the food dissolves the harmful substances easily.Accordingly, food enters microwave oven, want to take off the wrap to protect fresh film first."No. 5" PP: when the microwave dinner box is put into the microwave oven, remove the cover and use it: the only plastic box that can be put into the microwave oven can be reused after cleaning.Special attention should be paid to some microwave meal boxes. The box body is indeed made with no. 5 PP, but the box cover is made with no. 1 PE.To be sure, remove the lid from the container before putting it into the microwave."6" PS: bowl pack bubble noodles box, fast food box do not use microwave oven to cook bowl to pack instant noodles to use: heat resistant and cold resistant, but cannot put into microwave oven, lest because temperature is too high and release chemicals.And cannot be used to hold strong acid (such as orange juice), strong alkaline substance, because can decompose to human body bad polystyrene, easy to cause cancer.Therefore, try to avoid packing hot food in a fast-food box.Other types of "no. 7" PC: bisphenol A residues in water bottles, water bottles and milk bottles PC, the higher the temperature, the more release, the faster the speed.Therefore, the hot water should not be filled with PC water bottles to increase the speed and concentration of bisphenol A (if any) release, without heating, without entering the dishwasher, without direct sunlight, etc