What Are The Common Plastics in Life Which Are Polypropylene Materials?

Generally, the plastic products we use in our lives, such as plastic cups, plastic cutlery, plastic lunch boxes, plastic bowls (plastic kitchen utensils and the like), including some plastic toys, or some fitness balls, raincoats, etc. , They are all made of PP, PE, PVC, etc. PP is mostly used for some plastic kitchen utensils, such as some plastic stools, tables, etc., all use this, PE is generally some raincoats and the like, PVC is more like to do Some toys, fitness balls, PVC balls are not unfamiliar names, because I do foreign trade, the company produces more of these things, so I know some. PP, PE, PVC are the abbreviations of English names. The Chinese names are polypropylene, polyethylene, and polyvinyl chloride. The full English names are: polypropylene, polyethylene, and polyvinylchloride. You will find that the English abbreviations of the materials listed upstairs have a P in front of them, and P stands for "multiple polymerizations". It means that general macromolecules or high polymers are polymerized from ordinary low molecular weight monomers. For example, the Chinese name of PP is polypropylene, and the English name is polypropylene. The first P stands for poly-"multiple, polymerization", and the latter P stands for propylene "propylene". PE, PVC can be deduced by analogy. All three are polymer materials, and all are polyolefins. In layman's terms, they are all plastic raw materials, and these three are generally granular. Some of our common old-fashioned slippers are made of PVC. They are soft in summer and hard in winter, which has a lot to do with the temperature sensitivity of PVC. PVC will decompose toxic gas - chlorine gas at high temperature. Among the three, PVC has the highest density. Ordinary plastic bags are made of PE, which has good toughness. PE is also divided into HDPE (high density polyethylene) and LDPE (low density polyethylene), and the density is different, which leads to some of its properties. difference. PP is a relatively safe plastic among plastics. Generally, the packaging bags on food are made of it. Of course, PP also has grades, and the packaging of food must be food-grade. pp has the smallest density among the three and can float on the water. Such polymer materials can generally be modified by adding some other materials to make them superior in overall performance or in a certain aspect, so as to be used for special purposes. Of course, the price will sometimes be greatly increased after modification. These are the knowledge in "polymer material science".