Knowledge about plastic packaging containers
"01" - PET (polyethylene terephthalate) mineral water bottles, carbonated beverage bottles are made of this material. Dong Jinshi pointed out that beverage bottles can not be recycled with hot water. This material is heat resistant to 70 ° C. It is only suitable for hot drinks or frozen drinks. It is easy to deform when filled with high temperature liquid or heated, and it is soluble in harmful substances. Moreover, scientists have found that this plastic product may release carcinogens after 10 months of use and is toxic to humans. Therefore, if the beverage bottle is used up, it will be discarded. Do not use it as a water cup, or use it as a storage container to wear other items, so as not to cause health problems.
"02" - HDPE (High Density Polyethylene) plastic containers for cleaning products, bath products, plastic bags used in supermarkets and shopping malls are mostly made of this material, can withstand high temperatures of 110 ° C, and indicate food Plastic bags can be used to savour food. Plastic containers for cleaning products and bath products can be reused after careful cleaning. However, these containers are usually not easy to clean, and the original cleaning products remain, which become a hotbed of bacteria. It is not clean enough. It is best not to recycle.
"03"——PVC (polyvinyl chloride) According to the introduction, the toxic and harmful substances easily produced by plastic materials of this material come from two aspects. One is that the single-molecule vinyl chloride is not completely polymerized during the production process, and the other is Harmful substances in plasticizers. These two substances are easily precipitated when they encounter high temperature and oil, and the toxic substances are easily carcinogenic when they enter the human body with food. Currently, containers of this material have been used less for packaging foods. If you are using it, don't let it get hot.
"04" - LDPE (low density polyethylene).... Road fan: Our commonly used kettle is generally the material and the material below, and the plastic film, plastic film, etc. are all such materials. The heat resistance is not strong. Generally, the qualified PE cling film will have a hot melt phenomenon when the temperature exceeds 110 ° C, leaving some plastic preparations that cannot be decomposed by the human body. Moreover, the food is wrapped with a wrap film, and the oil in the food easily dissolves the harmful substances in the wrap film. Therefore, when the food enters the microwave oven, the wrapped plastic wrap is first removed.
"05" - PP (polypropylene) microwave lunch box made of this material, resistant to 130 ° C high temperature, poor transparency, this is the only plastic box that can be placed in the microwave oven, can be reused after careful cleaning. Special attention should be paid to some microwave oven lunch boxes, which are made of PP No. 05, but the cover is made of PS PS (polystyrene). PS transparency is good, but it is not resistant to high temperature, so it cannot be combined with the box. And put it in the microwave. To be on the safe side, remove the lid before placing it in the microwave oven.
"06" - PS (Polystyrene) This is the material used to make bowled instant noodles and foamed snack boxes. It is heat and cold resistant, but it cannot be placed in a microwave oven to prevent the release of chemicals due to excessive temperature. And can not be used for scented strong acid (such as orange juice), strong alkaline substances, due to the decomposition of polystyrene that is not good for the human body. Therefore, you should try to avoid using hot food boxes to pack hot food.
"07" - PC and other PCs are a kind of material that is widely used, especially for the manufacture of baby bottles, space cups, etc., which are controversial because they contain bisphenol a. Experts pointed out that in theory, as long as the bisphenol a is converted into a plastic structure during the process of making PC, it means that the product is completely free of bisphenol a, let alone release. However, if a small amount of bisphenol a is not converted into a 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, the faster the speed. Therefore, you should not use a PC water bottle to hold hot water. If your kettle number is 07, the following methods can reduce the risk: do not heat when using, do not direct in the sun. 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 there is any damage or breakage in the container, it is recommended to stop using it. Because of the fine pit pattern on the surface of the plastic product, it is easy to hide the bacteria. Avoid repeated use of aging plastic appliances.
The plastic recycling symbol is a triangular symbol, usually at the bottom of a plastic container. There are 1 to 7 numbers in the triangle, each of which represents a different material, so the different numbers in the recycling mark indicate which resin the product is made of, if the product is made of several different materials, then The main, basic materials of the product are indicated. This set of symbols originated in the United States and is now accepted and cited by many countries including China. In China, the marking of recycling of plastic products is non-mandatory. Some formal big brand enterprises have recently begun to mark recycling marks in order to facilitate the recycling of plastic products.
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