① It has good mechanical properties, impact strength is 3~5 times of other films, and good folding resistance. ② It is resistant to oil, fat, dilute acid and alkali, and most solvents. ③ It has excellent high and low temperature resistance, and can be used for a long time within the temperature range of 120 ℃. It can withstand 150 ℃ high temperature and - 70 ℃ low temperature for short term use, and has little impact on its mechanical properties at high and low temperatures. ④ Low permeability of gas and water vapor, which means excellent gas blocking, water, oil and odor performance. ⑤ High transparency, UV blocking, good gloss. ⑥ It is non-toxic, tasteless, sanitary and safe, and can be directly used for food packaging.
There is a triangle with an arrow at the bottom of the plastic bottle, and there is a number in the triangle. The following numbers in the triangle at the bottom of the plastic bottle refer to the ingredients contained in the bottle and the impact of the ingredients on human health - 1 - PET polyethylene terephthalate is common in mineral water bottles, carbonated beverage bottles, etc. When the temperature reaches 70 ℃, it is easy to deform, and substances harmful to human body dissolve out. After 10 months of use, No. 1 plastic may release carcinogen DEHP. This kind of bottle cannot be put in the car to bask in the sun, and cannot contain alcohol, oil and other substances. 2 - HDPE is commonly used in white medicine bottles, cleaning supplies and bath products. Do not use it as a water cup or as a storage container for other items. 3 - PVC is commonly used in raincoats, building materials, plastic films, plastic boxes, etc. Due to its good plasticity and low price, it is widely used. It reaches the peak when the heat resistance reaches 81 ℃. It is easy to produce harmful substances when the temperature is high. It is rarely used for food packaging. It is difficult to clean and easy to remain. Do not recycle. 4 - PE polyethylene is commonly used in fresh-keeping film, plastic film, etc. Harmful substances are produced when the temperature is high. When toxic substances enter the human body with food, they may cause breast cancer, congenital defects of newborns and other diseases. 5 - PP polypropylene is commonly used in soy milk bottles, yogurt bottles and microwave oven lunch boxes, with a melting point of 167 ℃. It is the only plastic product that can be put into the microwave oven and can be reused after careful cleaning. It should be noted that for some microwave oven lunch boxes, the box body is made of No. 5 PP, but the box cover is made of No. 1 PET. Since PET cannot withstand high temperature, it cannot be put into the microwave oven together with the box body. 6 - PS polystyrene is commonly used in bowls of instant noodles and fast food boxes. Do not put it into the microwave oven to avoid releasing harmful chemicals due to high temperature. Avoid using fast food boxes to pack hot food, and do not use microwave ovens to cook bowls of instant noodles. 7 - PC polycarbonate is commonly used in water bottles, space cups and milk bottles. Department stores often use these water cups as gifts. However, the cup made of this material can easily release the toxic substance bisphenol A, which is harmful to human health. In addition, do not heat the cup when using it, and do not expose it to the sun.