there are 5 in the triangle at the bottom of the plastic bottle, which represents that the material of the plastic product is PP (polypropylene). The triangle with arrow indicates that it can be recycled
extended data:
plastic products recycling logo, designed by relevant institutions of the American plastic industry. The sign is characterized by plastic material identification code containers and packages. From 1-7, according to the number, people can simply recycle without understanding the similarities and differences of various plastic materials
each plastic container has a small ID card – a triangular symbol, usually at the bottom of the plastic container. There are 1-7 numbers in the triangle, and each number represents a plastic container. They are made of different materials, and their use also has different taboos
No. 5 refers to PP (polypropylene), which is mostly used to make buckets, garbage cans, baskets, baskets and food containers for microwave ovens
common soy milk bottles, yogurt bottles, juice bottles and microwave boxes. It can withstand the high temperature of 167 ℃. It is the only plastic box that can be put into the microwave oven and can be reused after cleaning. It should be noted that in some microwave lunch boxes, the box body is made of No. 5 PP, but the cover of the box is not. Made of No. 4 PE, this one can’t withstand high temperature and can’t be put into the microwave oven together with the box
References: Baidu Encyclopedia – plastic recycling logo
there are 5 in the triangle at the bottom of the plastic bottle, which represents that the material of the plastic bottle is PP (polypropylene), which is special for the microwave oven lunch box. This is the only plastic box that can be put into the microwave oven and can be reused after careful cleaning
it should be noted that some microwave oven lunch boxes are made of No. 5 PP, but the box cover is not, so the cover needs to be removed when entering the microwave oven
extended data
I. different numbers represent different materials
1-pet (polyethylene terephthalate)
mineral water bottles and beverage bottles are mainly made of this material. The heat resistance of this material is up to 70 ℃, so it can not be used to recycle hot water. It is only suitable for warm or frozen drinks. It is understood that after 10 months of use, this plastic product may release carcinogens, which are harmful to human body. Therefore, it is best to throw away the beverage bottle after use, and do not use it as a container for water cups or other items
2-hdpe (high density polyethylene)
plastic containers of cleaning products and bath products. This material is not easy to clean, so it is best not to reuse the plastic containers of cleaning products and bath products, because it is not easy to clean, it will produce a lot of bacteria
3-pvc (polyvinyl chloride)
raincoats, building materials, plastic films, plastic boxes, etc. are mainly made of this material. It is understood that the containers of this material have been less used to package food. If it is used, do not let it be heated, because it can only withstand the high temperature of 81 ℃, and it is easy to cause cancer if it enters the human body in case of high temperature and grease
4-ldpe (low density polyethylene)
the fresh-keeping film and plastic film are mainly made of this material. When the heat exceeds 110 ℃, hot melting will occur. If put into the microwave oven, the oil in the food will dissolve the harmful substances in the fresh-keeping film. Therefore, when the food is put into the microwave oven, the fresh-keeping film should be removed first
5-pp (polypropylene)
special material for microwave oven lunch box, which is the only plastic box that can be put into the microwave oven and can be reused after careful cleaning. It should be noted that some microwave oven lunch boxes are made of No. 5 PP, but the box cover is not, so the cover needs to be removed when entering the microwave oven
6-ps (polystyrene)
this is mainly the material of bowl instant noodle box and foaming fast food box. You can’t put it in the microwave
7-pc and other
are mostly used to make milk bottles, space cups, etc., and can not be used to hold hot water
II. Identify the advantages and disadvantages of plastic products
1. No matter what kind of material you choose, you must have a clean and smooth appearance without peculiar smell and smell
the surface of many plastic tableware has beautiful color patterns. If the content of heavy metals such as lead and cadmium in the patterns exceeds the standard, it will bring potential safety hazards to human health. General plastic products have a protective film on the surface. Once the film is scratched by a hard tool, harmful substances will be released
the surface of inferior plastic tableware is often not smooth, and harmful substances may precipitate out. Therefore, once plastic products are damaged, it is best not to continue to use them
2. When purchasing, you can hold the bottle body with your hand, add a little force, and observe the instantaneous deformation of the bottle body. The smaller the deformation, the higher the strength
3. Do not excessively pursue transparency when purchasing beverage bottles
4. Check the product marks, such as production license mark, manufacturer’s address, contact information, material, production date, executive standard, recyclable mark, instructions and other relevant information
III. correctly use plastic bottles
1. Pay attention to the marks on the outer package of the bottle and understand the material and heat resistance of the bottle
at the bottom of the bottle, there is generally a triangular sign composed of three arrows, indicating that it can be “recycled”. As mentioned earlier, the numbers inside represent different materials. If it is made of several different materials, it identifies the main materials of the product. These figures do not directly indicate the heat resistance of plastic bottles. Understanding the materials represented by the figures can facilitate consumers to use plastic products scientifically
2. Consumers should try to choose plastic bottles without decorative patterns, colorless and tasteless, smooth surface and strong hand feel
3. Repeated use of mineral water bottles will have potential health hazards
nowadays, some mineral water bottles and beverage bottles in the market are fashionable and easy to carry. Many people like to reuse them. Many people often fill a bottle of hot water when they go out for a rainy day. For convenience, some people are used to putting a few bottles of mineral water in private cars, or leaving the mineral water they haven’t drunk at one time in the car, waiting for the next time. These practices pose health risks
4. The plastic bottle releases poison in case of heat
qualified beverage bottles and mineral water bottles are required to be made of food grade plastic, most of which are PET bottles (1 in the triangle symbol). These food grade PET bottles are usually not resistant to high temperature and are generally safe to use below 70 ℃. In particular, we remind you not to put hot water higher than 70 ℃ into beverage bottles or mineral water bottles
reference: People’s Daily – beverage bottle bottom figures have mystery & nbsp; Expert: reuse of some materials is harmful to health
five in the triangle at the bottom of the plastic bottle represents that the bottle is made of polyethylene and can be recycled.
there are 5 in the triangle at the bottom of the plastic bottle, which represents that the material of this plastic product is PP (polypropylene). The triangle with arrow indicates that it can be recycled
such plastic products are generally able to withstand temperatures above 100 degrees, such as: microwave oven lunch box
suggestion: when putting into the microwave oven, remove the cover
use: the only plastic box that can be put into the microwave oven can be reused after careful cleaning. It should be noted that for some microwave oven lunch boxes, the box body is indeed made of No. 5 PP, but the box cover is made of No. 1 PE. Because PE cannot withstand high temperature, it cannot be put into the microwave oven together with the box body. To be on the safe side, remove the lid before putting the container into the microwave oven
the numbers marked on plastic products respectively mean:
“No. 1” pet
mineral water bottles, carbonated beverage bottles and beverage bottles are not recycled. Use of hot water: heat resistant to 65 ℃ and cold resistant to – 20 ℃. It is only suitable for warm or frozen drinks. If it is filled with high-temperature liquid or heated, it is easy to deform, and substances harmful to human body will melt out In addition, scientists found that No. 1 plastic may release carcinogen DEHP after 10 months of use, which is toxic to testis Therefore, drink bottles should be discarded when they are used up. They should not be used as water cups or storage containers to hold other items, so as not to cause health problems
“No.2” HDPE
cleaning products and bath products are not thoroughly cleaned. It is recommended not to recycle them: they can be reused after careful cleaning, but these containers are usually difficult to clean, leaving the original cleaning products and becoming a hotbed of bacteria. You’d better not recycle them
“No.3” PVC
at present, it is rarely used for food packaging. It is best not to buy and use it: this material is easy to produce harmful substances at high temperature, and even it will be released during the manufacturing process. After the toxic substances enter the human body with food, they may cause breast cancer, neonatal congenital defects and other diseases At present, containers made of this material are rarely used to package food If in use, do not let it heat
“No.4” LDPE
wrap the fresh-keeping film, plastic film and other fresh-keeping films on the surface of food and use them in the microwave oven: the heat resistance is not strong. Generally, the qualified PE fresh-keeping film will melt when the temperature exceeds 110 ℃, leaving some plastic preparations that cannot be decomposed by the human body In addition, wrap the food with plastic wrap and heat it. The oil in the food can easily dissolve the harmful substances in the plastic wrap Therefore, when putting food into the microwave oven, first remove the wrapped preservative film
“No.5” PP
microwave oven lunch boxes and fresh-keeping boxes generally use special PP for microwave oven (polypropylene, special PP for microwave oven, high temperature resistance 120 ℃, low temperature resistance – 20 ℃), because of the cost, the special PP is generally not used for the cover. When putting into the microwave oven, it is necessary to take down the cover and use it Because all kinds of bayonet fresh-keeping boxes mostly use transparent PP instead of special PP, they can not be put into microwave oven Usage: the only plastic box that can be put into the microwave oven can be reused after careful cleaning It should be noted that for some microwave oven lunch boxes, the box body is indeed made of No. 5 PP, but the box cover is made of No. 1 Pet. Because pet cannot withstand high temperature, it cannot be put into the microwave oven together with the box body To be on the safe side, remove the lid before putting the container into the microwave oven
“No. 6” ps
do not use microwave oven to cook instant noodles in bowls of instant noodle boxes and fast food boxes: it is heat-resistant and cold resistant, but it cannot be put into microwave oven to avoid releasing chemicals due to high temperature (it will be released when the temperature is resistant to 70 ℃) And can not be used to carry strong acids (such as orange juice) and strong alkaline substances, because it will decompose polystyrene which is bad for human body and is easy to cause cancer Therefore, you should try to avoid packing hot food in fast food boxes
“No.7” PC
other categories: kettle, water cup and milk bottle PC glue is used in case of heat-release bisphenol A: a material widely used, especially in milk bottles, which is controversial because it contains bisphenol A Lin Hanhua, an associate professor of biology and chemistry at the City University of Hong Kong, said that in theory, as long as bisphenol A is 100% converted into plastic structure in the process of making PC, it means that the product has no bisphenol A at all, let alone release it However, if a small amount of bisphenol A is not converted into the plastic structure of PC, it may be released into food or drink Therefore, be careful and pay special attention when using this plastic container Cleaning measures to deal with bisphenol A: the higher the temperature, the more and faster the release rate of residual bisphenol A in PC Therefore, do not use PC water bottle to hold hot water, so as not to increase the release speed and efficiency of bisphenol A (if any)
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