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Identification of plastic products

views: 81 time: 2021-09-15

Identification of plastic products

The small recycling mark on the bottom of the plastic product is like a clear ID card for each plastic container. They are made of different materials and used in the same way. Consumers can also use this logo to know what material the plastic products used are made of and what environment they should be used in.


1. Classification

"01"——PET (polyethylene terephthalate) mineral water bottles and carbonated beverage bottles are all made of this material. Jinshi Dong pointed out that beverage bottles cannot be recycled or hold boiling water. This material is heat-resistant to 70°C. It is only suitable for warm or cold drinks. It is easy to deform if it is filled with high-temperature liquid or heated, and produce harmful substances to the human body. In addition, scientists have discovered that after 10 months of use, such plastic products may release carcinogens that are toxic to humans. Therefore, throw away the beverage bottle when it is used up, and don't use it as a water cup or as a storage container to hold other items, so as not to cause health problems.


"02"——HDPE (High Density Polyethylene) Plastic containers for cleaning products and bath products, and most of the plastic bags currently used in supermarkets and shopping malls are made of this material, which can withstand a high temperature of 110 ℃, indicating that it is used for food Plastic bags can be used to hold food. Plastic containers containing cleaning supplies and bath products can be reused after careful cleaning. However, these containers are usually not easy to clean. The original cleaning supplies remain and become a breeding ground for bacteria. The cleaning is not thorough and it is best not to recycle.


"03"-PVC (Polyvinyl Chloride) According to reports, the toxic and hazardous substances that plastic products of this material are prone to produce come from two aspects. Harmful substances in plasticizers. These two substances are easy to separate out when encountering high temperature and grease. After the toxic substances enter the human body with food, they are easy to cause cancer. At present, containers of this material have been less used for packaging food. If it is in use, do not let it heat up.


"04"-LDPE (low-density polyethylene) cling film, plastic film, etc. are all 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. In addition, when food is wrapped with plastic wrap and heated, the fat in the food can easily dissolve harmful substances in the plastic wrap. Therefore, when the food is put into the microwave oven, the wrapped plastic wrap must be removed first.


"05"——PP (Polypropylene) The microwave lunch box is made of this material, resistant to high temperatures of 130°C, and has poor transparency. This is the only plastic box that can be placed in a microwave oven. It can be reused after careful cleaning. It is important to note that some microwave lunch boxes, the box body is made of No. 05 PP, 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 the same as the box body. And put it in the microwave. To be safe, remove the lid of the container before putting it in the microwave.


"06"——PS (Polystyrene) This is the material used to make bowls of instant noodle boxes and foam snack boxes. It is heat-resistant and cold-resistant, but cannot be placed in a microwave oven to avoid the release of chemicals due to excessive temperature. And can not be used to contain strong acids (such as orange juice), strong alkaline substances, because it will decompose polystyrene which is not good for the human body. Therefore, you should try to avoid using fast food boxes to pack hot food.


"07"-PC and other types PC is a material that is widely used, especially for the manufacture of baby bottles, space cups, etc., because it contains bisphenol A and is controversial. Experts point out that in theory, as long as 100% of the bisphenol A is converted into a plastic structure in the process of making PC, it means that the product is completely free of bisphenol A, let alone released. 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, pay special attention when using this plastic container.

The residual bisphenol A in PC, the higher the temperature, the more release and the faster the speed. Therefore, the PC water bottle should not be used to hold hot water. If your kettle number is 07, the following methods can reduce the risk: do not heat it when using it, and do not expose it to direct sunlight. Do not use a dishwasher or a dishwasher to clean the kettle. Before using for the first time, wash with baking soda powder and warm water, and dry naturally at room temperature. If the container has any fall or damage, it is recommended to stop using it, because if there are fine pits on the surface of the plastic product, it is easy to hide bacteria.


The most toxic ones above are Nos. 3, 6 and 7. If these three numbers appear on the bottom of the bottle, pls pay special attention.

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