PP, PE, PVC are abbreviations of English names. Chinese name is polypropylene, polyethylene, polyvinyl chloride, English full name are: polypropylene, polyethylene, polyvinyl chloride
You will find that there is a P character in front of the English abbreviations listed on the upper floors. P stands for "multiple polymerization," which means that general polymers or polymers are polymerized from common low molecular weight monomers. Made of. For example, the Chinese name of PP is polypropylene, and the English name is polypropylene. In the front one P means poly-“multiple, polymerization”, and the latter one means “propylene”. PE, PVC, and so on.
All three are polymer materials and all are polyolefins. Generally speaking, they are all plastic materials. The three are generally granular. The
Some of our common old-fashioned slippers are made of PVC. They are very soft in the summer and soft. This is very much related to the temperature sensitivity of PVC. Pvc will decompose toxic gases, chlorine, at high temperatures. The density of PVC in the three is the largest. The
Ordinary plastic bags are made of PE. Its toughness is relatively good. PE is also divided into HDPE (high-density polyethylene) and LDPE (low-density polyethylene), and the density is different. As a result, some of its properties are very high. difference. PP is a relatively safe plastic in plastics. In general, the packaging bag on food is used to do it. Of course, PP has a grade, and food packaging must be food-grade. Pp has the lowest density among the three and can float on the surface. Like these polymer materials, it is generally possible to add some other materials to modify them, so that their overall performance or performance in a certain area is superior for special purposes. Of course, the price after modification is sometimes greatly increased. These are the knowledge of "polymer materials science".
PS Polystyrene Polystyrene; PC Polychloroprene Polychloroprene PP Polypropylene Polypropylene
ABS Acrylonitrile Butadiene Styrene Acrylonitrile Butadiene Styrene (Plastic) PA polyamide Polyamide
Identification of PP and PE For more information on antimicrobial plastics, please visit: www.kangjun.net.cn Polyethylene and polypropylene are the most commonly used olefin plastics. Polybutene-1 and poly-4-methylpentene-1 are also used. Some copolymers of ethylene-ethylene and polyisobutylene used as gaskets are also important polyolefin plastics. The easiest way to identify these plastics is to use infrared spectroscopy. However, some information can also be obtained from the melting temperature range
Polyethylene (relative to density) 105~130°C Polypropylene 160~170°C Polybutene 120~135°C Poly 4-methylpentene-1 More than 240°C