Why should plastic bottles be divided into food packaging and medical packaging?
ABS is composed of acrylonitrile, butadiene, styrene polymer plastic, it eye-catching colors, heat resistance, firmness, outer surface of chromium, nickel and other metal films, making keys, buttons, knife, TV shell, umbrella handle etc..PA nylon plastics, its characteristic of tenacity, firmness, wear resistance, commonly used in the production of comb, toothbrush, hook, fan, bag rope, fruit bags etc.. Non toxic, but not long-term contact with acid and alkali.
PP is a polypropylene plastic, non-toxic and tasteless, can be soaked in boiling water at 100 degrees Celsius, no deformation, no damage, the common acid, alkali, organic solvents almost do not work on it. Used for tableware.PS is polystyrene plastic. It is easy to dye and transparent. It is used to make lampshade, toothbrush handle, toy and electrical appliance parts. It is resistant to acid and alkali corrosion, but easily soluble in chloroform, two vinyl chloride, banana water and other organic solvents.PVC is a PVC, bright color, corrosion resistant, durable, due to an increase in the manufacturing process of plasticizer, anti ageing agent assisted a number of toxic materials, so their products generally do not store food and drug.
PE is polyethylene plastic, chemical stability, usually making food bags and various containers, acid, alkali and salt water solution erosion, but should not use strong alkaline detergent to wipe or soak.
Of course plastic is a general term, not a compound, but a lot of common collectively, including six species of PE, PP, PS, PVC, ABS, PA. Are called plastic, but not the same, according to the characteristics of different purposes. Such as medical containers generally use PE, food with more PP, there are unscrupulous traders with PS and PVC do, it is poison lunch box. Briefly explain the characteristics of the six
