2, 7 main plastics classification PC.
3, 7 plastic classification and pictures.
4, 7 plastic classification icon.
1.7 plastic classification: PET, HDPE, PVC, LDPE, PP, PS, others.
2.PET: It is often used to make transparent protective films such as mineral water bottles, cola beverage bottles, juice bottles and screen protective films, which are usually colorless and transparent.
3. Because it can only resist heat to 70℃, this kind of beverage bottle is only suitable for cold drinks and warm drinks. It is easy to deform when filled with high-temperature liquid (such as hot water) or heated, and some substances harmful to human body are dissolved out.
4. And plastic products may release carcinogens after using 10 months, which is toxic to human body.
5.PET can also be spun, which is what we often call polyester, so there is a saying that beverage bottles can be recycled to make clothes during the Olympic Games.
6. Many sportswear that pursue breathability and portability are made of polyester, which is also the popular clothing material "polyester" a long time ago. However, due to the backward spinning method at that time, polyester clothes were not comfortable to wear now.
7. In addition, PET has many engineering applications.
8.HDPE: bottles, yogurt bottles, chewing gum bottles, shopping bags, trash cans, agricultural pipes, cup holders, car guardrails, playground equipment and composite plastic wood suitable for food and medicine, cleaning supplies and bathing supplies.
9. At present, most plastic bags used in supermarkets and shopping malls are made of this material, which can withstand the high temperature of 1 10℃, indicating that plastic bags for food can be used to hold food.
10.HDPE is widely used in all kinds of translucent and opaque plastic containers, and it feels thick.
1 1.PVC: Now it is mostly used to make some cheap artificial leather, floor mats, sewer pipes, raincoats, PVC plastic pipes, plastic switches, sockets and so on.
12. Because of its good electrical properties and certain flame retardant characteristics, it is widely used to manufacture wire and cable sheaths.
13. In addition, PVC is also widely used in industrial fields, especially in places with high requirements for acid and alkali corrosion resistance.
14.LDPE: All kinds of containers, medicine bottles, washing bottles, pipes and various molding laboratory equipment, plastic films and cling films, hose packaging of toothpaste or facial cleanser, paper milk boxes, beverage boxes and other packaging boxes are made of LDPE.
15. It is mostly used for plastic film and other appliances, and should not be used as a beverage container.
16.PP: secondary juice, beverage cups, plastic plates, locked fresh-keeping boxes, etc.
17. The microwave lunch box is made of this material, which can withstand the high temperature of 130℃ and has poor transparency. It is the only plastic box that can be put into the microwave oven and reused after careful cleaning.
18.PP has high hardness and glossy surface.
19.PP is also widely used, such as packaging, toys, washbasins, buckets, clothes hangers, cups, bottles and so on.
20. Automotive bumpers and other engineering applications.
The PP spun by 2 1. is called polypropylene fiber, which is very common in textiles, non-woven fabrics, ropes, fishing nets and other products.
22.PS: fast food boxes, cheap transparent products, foam plastics, desk accessories, self-service trays, utensils, toys, videos, Yakult bottles, ice cream boxes, instant noodle bowls, partitions, and styrofoam products.
23. There are two kinds: foamed and unfoamed: foamed plastic lunch boxes are common.
24. Unfoamed, such as yogurt bottles.
25. White marks will appear when it is lightly folded without foaming, which can generally be torn by hand.
26. Others: synthesized from bisphenol A and diphenyl carbonate, often used to make kettles, transparent cups, baby bottles, drinking buckets, CD substrates, lenses, lampshades, etc.
27. In the process of making PC, raw material bisphenol A should completely become a plastic structural component and should not be released during use, but unqualified products can't. A small part of bisphenol A can't be completely converted into plastic, and it will be released into food when heated, which is harmful to children and fetuses.
28. At present, the most common water cup material is used as a gift by many department stores and automobile manufacturers.