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Daily plastic material encyclopedia (PET/PS/PP/PVC...) explanation

Views:5     Author:Xicheng Ep Ltd      Publish Time: 2021-09-25      Origin:Xicheng Ep Ltd

No. 1: PET (Polyethylene Terephthalate)


A container made of this material is a common plastic bottle for soda, also commonly known as a "poly bottle".

Common mineral water bottles, carbonated beverage bottles, etc. Heat-resistant to 70°C, it is easy to deform, and some harmful substances are melted out. No. 1 plastic product may release carcinogen DEHP after 10 months of use. Don't put it in the car to bask in the sun; don't put alcohol, oil and other substances.


No. 2: HDPE (High-Density Polyethylene)


Containers for detergents, shampoos, shower gels, edible oils, pesticides, etc. are mostly made of HDPE. The containers are mostly semi-opaque and feel waxy.

Common white medicine bottles, cleaning supplies, and bath products. Don't use it as a water cup or as a storage container for other items. If the cleaning is not thorough, do not recycle.


No. 3: PVC (Polyvinyl Chloride),


It is a polymer of vinyl chloride. Polyvinyl chloride (PVC) is a synthetic material with many advantages and is an ideal material for engineering plastics. Good chemical stability, resistance to acid, alkali and some chemicals. Moisture resistant, aging resistant, and flame retardant. The temperature cannot exceed 60°C during use, and it will become hard at low temperatures.


It is mostly used to make water pipes, raincoats, school bags, building materials, plastic films, plastic boxes and other utensils. Common raincoats, building materials, plastic films, plastic boxes, etc. It has excellent plasticity and cheap price, so it is widely used and can only heat up to 81℃. It is easy to produce bad substances at high temperatures, and it is rarely used for food packaging. Difficult to clean and easy to remain, do not recycle. Do not buy if it contains drinks.


Polyvinyl chloride is divided into soft plastic and hard plastic. The soft ones are mainly made into films, which are used as packaging materials, rainproof articles, agricultural seedling raising films, etc., as well as insulation layers for cables and wires, and artificial leather products. Rigid ones are generally made of pipes and plates. The pipes are used as water pipes and pipes for transporting corrosion-resistant fluids. The plates are used as the lining and floor of various storage tanks.


Other related: The natural color is yellowish translucent and shiny. Transparency is better than polyethylene and polystyrene, but worse than polystyrene. Depending on the number of additives, it can be divided into soft and hard polyvinyl chloride. The soft products are flexible and tough, and the hand feels sticky. The hardness of hard products is higher than that of low-density polyethylene. , And lower than polypropylene, whitening will occur at the inflection. Common products: plates, pipes, shoe soles, toys, doors and windows, wire sheaths, stationery, etc.


No. 4: LDPE (Low-Density Polyethylene),


Plastic bags that can be seen everywhere are mostly made of LDPE.

Common cling film, plastic film, etc. Harmful substances are produced at high temperatures, and toxic substances enter the human body with food, which may cause diseases such as breast cancer and birth defects of newborns. Do not put the plastic wrap into the microwave oven.


No. 5: PP (polypropylene),


A thermoplastic resin made by the polymerization of propylene. When uncolored, it is white translucent, waxy; lighter than polyethylene. The transparency is also better than polyethylene (PE) and harder than PE.


Common products: basins, barrels, furniture, films, woven bags, bottle caps, car bumpers, etc.


(Common soy milk bottles, yogurt bottles, juice drink bottles, microwave lunch boxes. The melting point is as high as 167℃. It is the only plastic box that can be placed in the microwave oven. It can be reused after careful cleaning. Note that some microwave lunch boxes, boxes The body is made of No. 5 PP, but the box cover is made of No. 1 PE. Because PE cannot withstand high temperatures, it cannot be placed in the microwave oven together with the box.)


No. 6: PS (Polystyrene)


Transparent when not colored. When the product falls on the ground or knocks, it has a metal-like crisp sound, good gloss and transparency, similar to glass, brittle and easy to break, and can mark the surface of the product with a fingernail. Modified polystyrene is opaque.


Because of its low water absorption, it is mostly used to make building materials, toys, stationery, rollers, as well as cup boxes, or disposable tableware for beverages in fast-food stores. Common products: stationery, cups, food containers, appliance shells, electrical accessories, bowls of instant noodle boxes, fast food boxes. Do not put it in a microwave oven to avoid the release of chemicals due to high temperatures. After loading acid (such as orange juice) and alkaline substances, carcinogens will be decomposed. Avoid using fast food boxes to pack hot food. Don't use the microwave to cook instant noodles in a bowl.


No. 7: Others.


Common PC categories, such as water bottles, space cups, and baby bottles. Department stores often use this kind of water cup, PA type, that is, nylon, which is mostly used for internal parts such as fiber textiles and some home appliances. PC easily releases the toxic substance bisphenol A at high temperature, which is harmful to the human body. Do not heat it when using it and do not expose it to direct sunlight. )-0

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