Each plastic container has an "ID card", usually at the bottom of the plastic container. There are numbers 1 to 7 inside the triangle, and each number represents a type of plastic container. Plastic product recycling labels are formulated by relevant agencies in the U.S. plastics industry. This set of signs puts plastic material identification codes on containers or packages, ranging from No. 1 to No. 7, so that people can easily join the recycling process without having to bother to learn the similarities and differences of various plastic materials.

No. 1

PET (polyethylene terephthalate), containers made of this material are common plastic bottles for soda, also commonly known as "treasure bottles". Special bottle".

Common mineral water bottles, carbonated drink bottles, etc. It is heat-resistant to 70°C and is easily deformed, and substances harmful to the human body may melt out. Plastic product No. 1 may release the carcinogen DEHP after being used for 10 months. Do not put it in the car in the sun; do not contain alcohol, oil and other substances

No. 2

HDPE (high-density polyethylene), detergent, shampoo, shower gel, Containers for cooking oil, pesticides, etc. are mostly made of HDPE. The containers are mostly opaque and feel like wax.

White medicine bottles, cleaning supplies, and bath products are common. Do not use it as a water cup or as a storage container for other items. If cleaning is not thorough, do not reuse.

No. 3

PVC (polyvinyl chloride) 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 is cheap, so it is widely used. It can only withstand heat of 81°C. It is easy to produce bad substances at high temperatures, so it is rarely used in food packaging. Difficult to clean and prone to residue, do not recycle. Do not buy if it contains drinks.

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. When toxic substances enter the human body with food, they may cause diseases such as breast cancer and birth defects in newborns. Keep the plastic wrap out of the microwave.

No. 5

PP (polypropylene) is mostly used to make buckets, trash cans, baskets, baskets and food containers for microwave ovens, etc.

(Commonly used are soy milk bottles, yogurt bottles, juice drink bottles, and microwave lunch boxes. It can withstand high temperatures up to 167°C and is the only plastic box that can be put into a microwave oven. It can be reused after careful cleaning. Use. It should be noted that some microwave lunch boxes are made of No. 5 PP but the lid is made of No. 4 PE. Since PE cannot withstand high temperatures, it cannot be put into the microwave oven together with the box body.)

No. 6

PS (polystyrene), due to its low water absorption, is mostly used to make building materials, toys, stationery, rollers, as well as drink cup boxes or disposables in fast food restaurants tableware.

(Common bowls of instant noodle boxes and fast food boxes. Do not put them in microwave ovens to avoid releasing chemicals due to excessive temperature. After being filled with acids (such as orange juice) and alkaline substances, they will decompose Emit carcinogens. Avoid using fast food boxes to pack hot food. Do not use microwave ovens to cook instant noodles.)

No. 7

Others. (Common PC types, such as kettles, space cups, and baby bottles. Department stores commonly use water cups made of this material. PA type, that is, nylon, is mostly used for fiber textiles and internal parts of some home appliances and other products. PC can easily release toxic substances under high temperatures. The substance bisphenol A is harmful to the human body. Do not heat it when using it, and do not expose it to direct sunlight)

Extended information:

Different materials have different usage conditions

< p>The small recycling mark on the bottom of plastic products is like a small ID card for each plastic container. They are made of different materials and have different uses.

“01”——PET (polyethylene terephthalate) Mineral water bottles and carbonated drink bottles are made of this material. Dong Jinshi pointed out that beverage bottles cannot be reused to hold hot water. This material is heat-resistant to 70°C and is only suitable for holding warm or frozen drinks. It is easy to deform when filled with high-temperature liquids or heated, and substances harmful to the human body may dissolve.

Furthermore, scientists have discovered that after 10 months of use, this plastic product may release carcinogens and be toxic to the human body.

Therefore, throw away beverage bottles after use, and do not use them as water cups or storage containers to hold other items, so as not to cause health problems.

“02”——HDPE (High Density Polyethylene) Plastic containers for cleaning supplies and bath products. Most of the plastic bags currently used in supermarkets and shopping malls are made of this material and can withstand 110 ℃ high temperature, plastic bags marked for food can be used to contain food.

Plastic containers for cleaning supplies and bath products can be reused after careful cleaning. However, these containers are usually difficult to clean and retain the original cleaning supplies, becoming a breeding ground for bacteria and incomplete cleaning. It is best not to recycle.

“03”——PVC (polyvinyl chloride) According to reports, the toxic and harmful substances easily produced by plastic products of this material come from two aspects. One is the monomers that are not completely polymerized during the production process. Molecule vinyl chloride, the second is harmful substances in plasticizers.

These two substances are easy to precipitate when exposed to high temperatures and grease. When toxic substances enter the human body with food, they can easily cause cancer. At present, containers made of this material are rarely used for packaging food. If in use, never let it get heated.

“04”——LDPE (low density polyethylene) cling film, plastic film, etc. are all made of this material. The heat resistance is not strong. Generally, qualified PE cling film will melt when the temperature exceeds 110°C, leaving some plastic preparations that cannot be decomposed by the human body. Moreover, when food is wrapped in plastic wrap and heated, the fat in the food can easily dissolve harmful substances in the plastic wrap. Therefore, before food is put into the microwave oven, the plastic wrap must be removed first.

“05”——PP (polypropylene) microwave lunch box is made of this material, which is resistant to 130℃ high temperature and has poor transparency. This is the only plastic box that can be put into the microwave oven. After careful cleaning Reusable.

It is important to note that some microwave lunch boxes are made of No. 05 PP for the body, but the lid is made of No. 06 PS (polystyrene). PS has good transparency, but is not resistant to high temperatures. , so it cannot be put into the microwave oven together with the box body. For safety reasons, remove the lid from the container before placing it in the microwave.

“06”——PS (polystyrene) This is the material used to make bowl-type instant noodle boxes and foam fast food boxes. It is heat-resistant and cold-resistant, but cannot be placed in a microwave oven to avoid releasing chemicals due to excessive temperature. And it cannot be used to hold strong acids (such as orange juice) or strong alkaline substances, because it will decompose polystyrene that is not good for the human body. Therefore, you want to avoid packing hot food in snack boxes.

“07”——PC and other types PC is a material that is widely used, especially in the manufacture of baby bottles, space cups, etc. It is controversial because it contains bisphenol A. Experts point out that theoretically, as long as bisphenol A is 100% converted into a plastic structure during the production of PC, it means that the product does not contain bisphenol A at all, let alone releases it. However, if a small amount of bisphenol A is not converted into the plastic structure of PC, it may be released and enter food or drinks.

Therefore, be careful when using this plastic container. The higher the temperature, the more bisphenol A remains in PC will be released, and the faster it will be released. Therefore, PC water bottles should not be used to hold hot water. If your kettle is numbered 07, the following methods can reduce the risk: do not heat it when using it, and do not expose it to direct sunlight. No need to use a dishwasher or dishdryer to clean the kettle.

Before first use, clean with baking soda and warm water and dry naturally at room temperature. If the container is dropped or damaged in any way, it is recommended to stop and not use it again, because if there are fine pits on the surface of plastic products, bacteria can easily hide. Avoid repeated use of aged plastic utensils.

Reference: Baidu Encyclopedia---Plastic recycling logo