What do the numbers on the bottom or bottle of plastic products represent?

There is usually a triangle at the bottom of the plastic product, the number in the center indicates the number, and the English below indicates the name of the plastic material. The triangle symbol is a plastic ** sign, which is generally at the bottom of a plastic container. The triangle has numbers 1-7, each representing a different plastic material.

Generally, these numbers represent the composition of plastic products, and these numbers can be used to identify the various materials and properties used in their synthesis.

It usually represents the name of the material, melting point, and hardness, which can reflect whether he can be ** again, and what kind of plastic products will be returned.

1. The number 1 at the bottom of the plastic bottle represents PET, that is, polyethylene terephthalate, most of the mineral water bottles and carbonated beverage bottles are made of this material, and the maximum heat-resistant temperature is 70 degrees. It is easy to deform at high temperatures, and it is easy to release carcinogens, which is toxic to the human body.

2. The number 2 at the bottom of the plastic bottle represents HDPE, both high-density polyethylene, most of the plastic containers for bath products and shopping plastic bags are made of this material, the maximum heat-resistant temperature is 110 degrees, and some can be reused several times, but pay attention to cleaning.

3. The number 3 at the bottom of the plastic bottle represents PVC, that is, polyvinyl chloride, most of the raincoats, plastic films, plastic boxes, etc. are made of this material, and the maximum heat-resistant temperature is 81 degrees.

4. The number 4 at the bottom of the plastic bottle represents LDPE, that is, low-density polyethylene, a lot of plastic wrap, plastic film is this material, and the highest heat-resistant temperature is 110 degrees.

5. The number 5 at the bottom of the plastic bottle represents PP, that is, polypropylene, many microwave oven lunch boxes are made of this material, and the maximum heat-resistant temperature is 130 degrees, which can be put into the microwave oven for heating.

6. The number 6 at the bottom of the plastic bottle represents PS, that is, polystyrene, most of the bowls of instant noodle boxes and fast food boxes belong to this material, but they cannot be put into the microwave oven, otherwise toxic substances will be precipitated.

7. The number 7 at the bottom of the plastic bottle represents PC and other categories, most of the baby bottles and space cups belong to this material, and there is generally no problem.

Precautions for the use of plastic bottles.

Plastic bottles made of PET must not be used to hold oil, wine, beverages, etc.

Do not put it in the car, it will volatilize after the explosion, produce harmful substances, and people will harm people's health if they drink it again.

Be sure to keep plastic products out of the heat when used in the kitchen, because they will inevitably contain things.

The above content refers to Encyclopedia - Plastic Bottles.

The number 1 represents PET, which stands for polyethylene terephthalate. The number 2 stands for HDPE, which stands for High Density Polyethylene. The number 3 represents PVC, i.e., polyvinyl chloride.

The number 4 stands for LDPE, which stands for Low Density Polyethylene. The number 5 represents PP, which is polypropylene. The number 6 stands for PS, polystyrene.

The number 7 represents PC and other classes.

Each plastic utensil has a number at the bottom (it is a triangle with an arrow, and the triangle has a number inside) which is a plastic recyclable sign.

Different kinds of plastic have different logos. The types of plastics include polyvinyl chloride, low-density polyethylene, polystyrene, polypropylene, polyethylene, polyvinyl chloride, etc.

What does the number at the bottom of a plastic bottle mean? A lot of people don't know, if only they knew.

I'd suggest using the number 5 in the triangle.

The numbers 1-7 under the bottom of the plastic bottle indicate the basic building material of the plastic bottle, which is classified as follows:

1. "No. 1" stands for PET (polyethylene terephthalate), which is used in general mineral water, carbonated drinks and functional drink bottles. It is suitable for warm or cold drinks, and can withstand heat up to 45 degrees Celsius. After 10 months of use, the No. 1 plastic product may release the carcinogen DEHP.

It cannot be left in the car in the sun; Do not fill it with alcohol, oil, etc.

2. "No. 2" stands for HDPE (high-density polyethylene), and plastic containers containing cleaning products and bath products or plastic bags commonly used in shopping malls are mostly made of this material. It can withstand temperatures of 110 and can be used to hold food if it is indicated for food.

3. "No. 3" represents PVC (polyvinyl chloride), in which the plasticizer contains harmful substances, which is easy to precipitate when encountering high temperature and grease, and many plasticizers have been banned in Europe, and China has been less used for packaging food. Common raincoats, building materials, plastic films, plastic boxes, etc. The plasticity is excellent and the price is cheap, so it is very common to use, and it can only withstand heat 81.

4. "No. 4" is LDPE (low-density polyethylene), the raw material of plastic wrap and plastic film, and the heat resistance is not strong. Qualified PE plastic wrap will be hot melt when the temperature exceeds 110, leaving some plastic preparations that the human body cannot decompose.

5. "No. 5" stands for PP (polypropylene), which is the only material that can be heated in the microwave, so it has become the raw material for making microwave lunch boxes. Resistant to temperatures up to 130 °C.

6. "No. 6" is PS (polystyrene), which is the material used to make bowl-filled instant noodle boxes and foamed fast food boxes. It cannot be used to contain strong acids (such as orange juice) and strong alkaline substances, because it will decompose polystyrene (carcinogen) that is not good for the human body.

7. "No. 7" stands for PC and other types of PC, which is a material that is widely used, mostly used in the manufacture of baby bottles, space cups, etc., and is controversial because it contains toxic bisphenol A. Theoretically, as long as BPA is 100% converted into a plastic structure during the production process of PC, it means that the product is completely free of BPA.

It is indicated as a Class 7 plastic ** mark.

07" means other.

Common PC types, such as water bottles, space cups, and baby bottles. Department stores often use water cups made of this material, PA, that is, nylon, which are mostly used for fiber textiles and some home appliances and other products. PC is prone to release the toxic substance bisphenol A at high temperatures, which is harmful to the human body.

Each plastic container has an "ID card", which is generally at the bottom of the plastic container. Inside the triangle are 1 7 numbers, each of which represents a type of plastic container. Plastics** labeling, developed by relevant agencies in the U.S. plastics industry.

This set of logos will be made of plastic materials on the container or packaging, from No. 1 to No. 7, so that the public does not need to bother to learn the similarities and differences of various plastic materials, and can simply join the ranks of the first work.