Plastic cups are a common item in our life, we often use plastic cups to fill water or drinks. There are many kinds of plastic cups, some plastic cups can be filled with hot water, but some plastic cups can only be filled with cold water. At the same time, different materials will also be different in appearance. Life we use plastic cups are commonly made of PP and PET material, many people will be on the plastic cup is PP material or PET material is good to this problem feel puzzled? For this problem, the following small make-up to answer for you, interested friends will quickly come together to see it!
PP is polypropylene, PET is polyester. Theoretically both are non-toxic, but in terms of aging resistance and weather resistance, PP is more suitable for water cups, PP has good heat resistance, can withstand high temperatures of 120 degrees, is the only plastic material that can be put into the microwave.
Polypropylene (PP) applications: microwave dishes, pots, plastic buckets, thermos shells, woven bags, etc.. Characteristics: high chemical stability, good health performance, high heat resistance. Microwave tableware can be used marked PP plastic products. Toxicity: non-toxic, harmless to the human body. The polymer can have three three-dimensional structure: isometric, intergraphic, atactic polypropylene, the first two can crystallize, the latter can not. Commercially available polypropylene products are basically the structure of the market iso-gauge, melting point of 164 ~ 170 degrees Celsius, the crystalline part of the density of 0.935 grams / cubic centimeters, the non-clean part of the 0.851 grams / cubic centimeters. PP's biggest drawback is that it is easy to oxidize and age. Now with the addition of antioxidants and ultraviolet absorbers to overcome.
Polyester (PET) applications: plastic beverage bottles, medicine bottles, cosmetic bottles, oil bottles, and a variety of bottle caps, insulation cover. Characteristics: good transparency, not easy to break, good chemical stability, suitable for a variety of liquid or solid drug packaging. It has good shielding for ultraviolet rays. Toxicity: non-toxic.
PET plastic bottle is the mainstream of beverage packaging. The dominant position in China's beverage packaging industry should be PET plastic bottles, so far, there is no superior or better package materials found to replace PET plastic bottles.PP bottles are mainly one-step injection pull blowing and two-step heating pull blowing, molding machine in the molding of PP bottles have the advantages of transparent, robust, heat-resistant, and the cost is also relatively low.
PP plastic bottles with better heat resistance, bottle shape depiction sensitive, safety, hygiene and the contents of the taste of the maintenance of inferiority, the price is cheaper than PET, PS, PE and other materials.PP plastic bottles in the beverage packaging market in the use of the scale has been gradually approaching PET bottles, modified resins, permeability enhancers, and machinery and equipment skills from time to time to make the development of PP containers can replace glass, PET and PVC containers, the market share is growing.
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PP and PET materials have their own advantages and characteristics, there is no absolute good or bad, mainly depends on individual needs and use of the situation to decide, if often used at high temperatures, you can choose PP material. The above is the analysis of PP plastic cups and PET plastic cups, I hope it can help you.
Post time: Aug-22-2023