Digital analysis of the bottom of the hottest food

  • Detail

According to China's national standard, the bottom of plastic containers should be marked with a triangular plastic recycling symbol, which is equivalent to the ID card of plastic containers. Although this marking method is a non mandatory requirement, large and medium-sized enterprises generally mark plastic recycling labels in order to facilitate the recycling of plastic products. When consumers choose plastic containers to hold food, they must recognize the bottom logo

professor dongjinshi, vice president and Secretary General of the International Food Packaging Association, pointed out that the bottom of the plastic bottle is printed with a triangle composed of three arrows, among which there is a number, ranging from 1 to 7. The triangle indicates that the material of the plastic bottle can be recycled, which does not mean that it can be reused. Each number from 1 to 7 represents a type of material. If the product is made of several different materials, then the identification is its main material. This annotation method originated in the United States and has been accepted and quoted by many countries, including China. Although this marking method is mainly for the convenience of plastic recycling, consumers can also know the material, purpose and environment of plastic products through this logo

1 means pet (polyethylene terephthalate), mine 10. Power supply of temperature control system: AC380V, 4.5kw spring water bottle and carbonated beverage bottle are made of this material, which is heat-resistant to 70 ℃, and it is easy to deform when filled with high-temperature liquid or heated, and substances harmful to human body will dissolve. Scientists found that this plastic product can release carcinogens after 10 months of use, which is toxic to human body

2 refers to HDPE (high density polyethylene), which is commonly used in the production of white medicine bottles, cleaning products and bath products. At present, most plastic bags used in supermarkets are made of this material, which can withstand 110 ℃ high temperature. Plastic bags used for food can be used to contain food. Plastic containers containing cleaning products and bath products can be reused after careful cleaning, but these containers are usually not easy to clean, leaving the original cleaning products and becoming a hotbed of bacteria, * so they should not be recycled

3 refers to PVC (polyvinyl chloride), which is commonly used in the production of raincoats, building materials, plastic films, plastic boxes and other products. The toxic and harmful substances easily produced by plastic products made of this material come from two aspects: one is the monomolecular vinyl chloride that has not been fully polymerized in the production process, and the other is the harmful substances in plasticizers. These two substances are easy to precipitate when encountering high temperature and grease, and toxic substances may cause cancer after entering the human body with food. At present, containers made of this material have been less used for packaging food. If you use this kind of food packaging, don't let it get heated

4 indicates that LDPE (low density polyethylene), fresh-keeping film, plastic film, etc. are all made of this material, and the heat resistance is not strong. Generally, qualified PE fresh-keeping film will appear hot melt when the temperature exceeds 110 ℃, leaving some plastic preparations that cannot be decomposed by the human body. Wrap food with plastic wrap and heat it. The oil in the food can easily dissolve the harmful substances in the plastic wrap. Therefore, before putting food into the microwave oven, remove the wrapped plastic wrap

5 means PP (polypropylene). The microwave oven lunch box is made of this material, which can withstand 130 ℃ high temperature and has poor transparency. This is a plastic box that * * can put into the microwave oven and can be reused after careful cleaning. Special attention should be paid to some microwave oven lunch boxes. The box body is made of PP, but the box cover is made of PS (polystyrene). PS has good transparency, but it is not resistant to high temperature. It cannot be put into the microwave oven together with the box body. To be on the safe side, remove the lid of the container before putting it into the microwave oven

6 means PS (polystyrene), which is the material used to make bowled instant noodles boxes and foaming fast food boxes. It is heat-resistant and cold resistant, but it cannot be put into the microwave oven to avoid releasing chemicals due to high temperature. At the same time, such plastic containers cannot be used to contain strong acids (such as orange juice) and strong alkaline substances, because polystyrene, which is harmful to human body, will be decomposed. Therefore, people should try to avoid packing hot food in fast food boxes

7 means that the result caused by the difference of P operation is not a problem; 2. Guide documents are formulated for the energy of friction resistance consumed by the impact pendulum in the process of one swing, and C (polycarbonate) and other categories are regularly updated. They are mostly used to manufacture milk bottles, space cups and other products, which contain bisphenol A. the higher the temperature, the more the release, and the faster the speed. When people use such containers, do not heat them and do not direct them in the sun** Wash with baking soda powder and warm water before first use, and dry naturally at room temperature; Do not use dishwasher and dryer to clean the kettle; If the container has any fall or damage, it should be stopped using, because if there is a slight crack on the surface of the plastic products, it is easy to hide dirt; The repeated use of aged plastic appliances should be avoided

plastic bottles are not allowed to be used as food packaging after recycling, otherwise the quality supervision department will immediately cancel the production license of relevant manufacturers once it is found. Because some properties of plastic bottles have changed during recycling, it is difficult to be used to produce plastic bottles, and most of them are used to produce non food container products

this article comes from the Internet, and the copyright belongs to the original author. It is only for everyone to share and learn. If the author believes that infringement is involved, please contact us, and we will immediately affect the forecast deletion after verification

Copyright © 2011 JIN SHI