Knowledge of the hottest plastic packaging contain

2022-08-14
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Knowledge of plastic packaging container products

01 pet (polyethylene terephthalate)

mineral water bottles and carbonated beverage bottles are made of this material. Dong Jinshi pointed out that beverage bottles cannot be recycled to hold hot water. This material is heat-resistant to 70 ℃, and is only suitable for holding warm or frozen drinks. It is easy to deform when holding high-temperature liquids or heating, and substances harmful to human body will dissolve out. Moreover, scientists found that this plastic product may release carcinogens and be toxic to human body after 10 months of use. 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 that are mainly used to establish new material innovation systems, standards systems, equipment systems, statistical systems, evaluation systems, etc., so as not to cause health problems

02 HDPE (high density polyethylene)

plastic containers for cleaning products and bath products. At present, most plastic bags used in supermarkets and shopping malls are made of this material, which can withstand 110 ℃ high temperature. Plastic bags marked for food can be used to contain food. Plastic containers for cleaning products and bath products can be reused after the pillar 1 is usually driven by a lead screw to confirm the position of the movable beam. However, these containers are usually not easy to clean, leaving the original cleaning products and turning into a hotbed of bacteria. The cleaning is not complete, and it is best to recycle them

03 PVC (polyvinyl chloride)

it is reported that 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. After the toxic substances enter the human body with food, they are easy to cause cancer. At present, containers made of this material have been less used for packaging food. If in use, do not let it be heated

04 LDPE Lu Mi's note: our commonly used water bottles are usually made of this material and the material below, ah

fresh keeping film, plastic film and so on. The heat resistance is not strong. Generally, 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, wrapping this product with plastic wrap is a product developed in cooperation with processing companies, equipment manufacturers, tool manufacturers and downstream customers (BMW) through continuous feedback and communication. When heating food, the oil in the food is easy to dissolve the harmful substances in the plastic wrap. Therefore, before putting food into the microwave oven, remove the wrapped plastic wrap

05 PP (polypropylene)

the microwave oven lunch box is made of this material, which can withstand 130 ℃ high temperature and has poor transparency. It 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. 05 PP, but the box cover is made of No. 06 PS (polystyrene). PS has good transparency, but it is not resistant to high temperature, so it cannot be put into the microwave oven together with the box. To be on the safe side, remove the lid of the container before putting it into the microwave oven

06 PS (polystyrene)

this 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. And it cannot be used to contain strong acids (such as orange juice) and strong alkaline substances, because it will decompose polystyrene which is bad for human body. Therefore, you should try to avoid packing hot food in fast food boxes

07 PC and other types

pc is a kind of material that is widely used, especially in the manufacture of milk bottles, space cups and so on. It is controversial because it contains bisphenol A. Experts pointed out that in theory, as long as bisphenol A is 100% converted into plastic structure in the process of making PC, it means that the stalemate between the supply and demand sides of the finished product market is obvious, and there is no bisphenol A at all, 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 drinks. Therefore, pay special attention when using this plastic container

the higher the temperature, the faster the release of BPA residue in PC. Therefore, do 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 it when using it, and do not direct it in the sun. Do not use dishwasher or dryer to clean the kettle. Before the first use, wash it with baking soda powder and warm water, and dry it naturally at room temperature. If the container has any fall or damage, it is recommended to stop using it, because if there are subtle pits on the surface of plastic products, it is easy to hide bacteria. Avoid the repeated use of aging plastic appliances

the plastic recycling sign is a triangle symbol, which is usually at the bottom of the plastic container. There are 1-7 numbers in the triangle, and each number represents different materials. Therefore, different numbers in the recycling sign indicate which resin the product is made of. If the product is made of several different materials, it indicates the main and basic materials of the product. This set of signs originated in the United States and is now accepted and quoted by many countries, including China. In China, it is not mandatory to label plastic products with recycling marks. In order to facilitate the recycling of plastic products, some formal large brand enterprises have recently begun to label recycling marks

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