What are the numbers on plastic products?

Plastic model ......You're stupid, and common sense is there.

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.