What do the numbers on plastic mean and what do the numbers on plastic represent?

The number "1" stands for PET (polyethylene terephthalate.

This material is used in mineral water, carbonated drinks and energy drink bottles. It is heat-resistant to 70 and easily deformed, and may release harmful substances when repeated for a long time.

Try not to store mineral water in the open air or in the car for a long time in hot weather, and do not flush boiling water directly into the mineral water bottle. The number "2" stands for HDPE (High Density Polyethylene.

Common white medicine bottles, cleaning products, bath products. Do not recycle, for example, as a drinking glass or as a storage container for other items. The number "3" stands for PVC (Polyvinyl Chloride.

Common raincoats, building materials, plastic films, plastic boxes, etc. It has excellent plasticity and low price, so it is very commonly used.

It can only withstand heat 81, and it is easy to produce bad substances at high temperatures, and it is rarely used in food packaging. It is difficult to clean and easy to remain, so do not recycle. PVC is not currently used to hold beverages.

The number "4" stands for LDPE (low-density polyethylene): At present, this material is mostly used in plastic wrap and plastic film on the market, but it is not very heat-resistant, but there is no tangible evidence on whether it is harmful to use in the microwave oven, but it is still recommended that you remove the wrapped plastic wrap before putting the food in the microwave oven. The number "5" stands for PP (Polypropylene.

The microwave lunch box is made of this material, which is resistant to 130 degrees of high temperature and has poor transparency, which is a plastic box that can be put into the microwave oven and can be reused after careful cleaning. Some lunch boxes are made of No. 5 PP, but the lid is made of No. 6 PS (polystyrene.

Manufactured, PS has good transparency, but it is not resistant to high temperatures, so it cannot be put into the microwave oven with the box. The number "6" stands for PS (polystyrene): it is a material used to make bowls of instant noodle boxes and foaming fast food boxes, and cannot be used to contain strong acids (such as orange juice) and strong alkaline substances, and cannot be put into the microwave oven to avoid the release of harmful substances due to excessive temperature.

The number "7" stands for PC (other categories): common water bottles, space cups, and baby bottles. Poor quality or improper use may lead to the precipitation of BPA, a substance that is harmful to the human body

Do not heat at high temperature when using and do not expose to direct sunlight. （

Explain in detail what the numbers on the plastic packaging mean, what material they correspond to, and the useful speed collection.

There is a triangle on the plastic, and there are numbers 1-7 in it, and different numbers represent different materials.

1. The number "1" in the auction represents polyethylene terephthalate.

i.e. PET. Uses: Mainly used for mineral water bottles, carbonated water, fruit juice drink bottles and soy sauce vinegar bottles.

2. The number "2" stands for high-density polyethylene.

i.e. HDPE.

Usage: HDPE is made into composite film with other plastics, and is also used in aquatic products.

3. The number "3" stands for polyvinyl chloride.

i.e. PVC. Uses: Used to manufacture intravenous infusion bags and disposable sterile infusion equipment.

4. The number "4" is low-density polyethylene.

i.e. LDPE.

Uses: It is widely used in packaging, mainly used in the production of plastic wrap for food and plastic bags for food.

5. The number "5" is polypropylene.

i.e. pp. Uses: One is to make containers, which can be used as microwave oven lunch boxes, and the other is to make packaging films, which are often used for the packaging of snacks, bread, fruits, etc.

6. The number "6" is polystyrene.

i.e. ps. Uses: PS is mainly processed into film and foam on packaging. The film is used for the packaging of fruits and vegetables, and the styrofoam is mostly used for bowls of instant noodles.

boxes and fast food boxes, etc.

7. The number "7" is polycarbonate.

i.e. PC or other plastics.

Uses: PC material made of plastic containers, do not heat when using, and do not expose to direct sunlight, otherwise toxic bisphenol A may be released

The higher the temperature, the more it is released, and the faster it is.

The meaning of the representation is as follows:

1. Polyester ———01-PET (PET bottle) such as: mineral water bottles, carbonated drink bottles.

2. High-density polyethylene - 02-HDPE such as: cleaning products, bath products.

3. PVC ———03—PVC such as: some decorative materials.

4. Low-density polyethylene - 04-LDPE such as: plastic wrap, plastic film, etc.

5. Polypropylene———05-pp (can withstand temperatures above 100 degrees) such as: microwave oven lunch box.

6. Polystyrene———06-ps (heat-resistant 60-70 degrees, hot drinks will produce toxins, and styrene will be released when burning) Such as: bowls of instant noodle boxes, fast food boxes.

7. Other plastics**—— 07—others such as: kettles, cups, bottles.

Precautions should be taken when using plastic products:

1. To understand the performance of the plastic products used, you can look at the logo at the bottom of the product, and you can know the material of the plastic through the logo.

2. Most plastics are not resistant to high temperatures, so try not to use plastic products to heat at high temperatures.

3. It is best not to use plastic products to contain oil, vinegar, oil, etc., for example, if the vinegar is stored for a long time, it may make the plastic swell, thus producing harmful substances to the human body.

4. Pay attention to maintenance when using plastic products, do not expose them to the sun, try not to let them rain, and dry them as soon as possible if they are rained.

The number "1" stands for polyethylene terephthalate, or PET. It is mainly used for mineral water bottles, carbonated water, fruit juice drink bottles and soy sauce vinegar bottles. The heat-resistant temperature of PET bottles is 70 degrees Celsius, which is only suitable for warm or frozen drinks, and is easy to deform when filled with boiling water or heated, and harmful substances to the human body will also be dissolved.

The number "2" stands for high-density polyethylene, which is a composite film made with other plastics, and is also used in aquatic products.

The number "3" stands for polyvinyl chloride, or PVC, which is also used to make intravenous infusion bags and disposable sterile infusion sets because of its cheapness. However, long-term use can lead to the accumulation of harmful substances DEHP. Therefore, from the perspective of safety, the pharmaceutical industry chooses non-PVC materials in the future.

The number "4" is low-density polyethylene, which is used in large quantities in packaging. LDPE is mainly used in the production of plastic wrap for food and plastic bags for food.

The number "5" is polypropylene, i.e. PP. One is to make containers. Unlike other materials, PP can be put into a plastic container in a microwave oven, and it is a plastic container that can be used as a storage container for food, oil, condiments, etc.

The second is the packaging film, which is unstretched and biaxially stretched. Unstretched polypropylene (CPP) is commonly used in the packaging of snacks, bread, fruits, etc.; Biaxially oriented polypropylene (BOPP) is a flexible packaging material comparable to cellophane.

The number "6" is polystyrene, which is mainly processed into film and foam on packaging. The film is used for the packaging of fruits and vegetables; Styrofoam is mostly used in bowl-filled instant noodle boxes and fast food boxes, but it is not resistant to high temperatures, so it cannot be heated directly in the microwave to avoid the release of toxic chemicals due to excessive temperatures.

The number "7" is polycarbonate, i.e. PC or other plastic. Plastic containers made of PC material may release toxic bisphenol A, and the higher the temperature, the more and faster it will be released, so do not heat it when using it, and do not expose it to direct sunlight.