Introduction of different plastic materials

- Sep 23, 2019-

"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 to use hot water. This material is heat resistant to 70 ° C. It is only suitable for warm drinks or frozen drinks. It is easy to deform when filled with high temperature liquid or heated, and it has a harmful substance. 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 hold other items, so as not to cause health problems.


“02”——HDPE (High Density Polyethylene) Plastic containers for cleaning products and bath products, and plastic bags used in supermarkets and shopping malls are mostly made of this material, which can withstand high temperatures of 110 ° C and indicate food. Plastic bags can be used to hold 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 reports, 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 plastics. These two substances are easy to precipitate when they encounter high temperature and oil, and toxic substances are easy to cause cancer when they enter the human body with food. Currently, containers of this material have been used less for packaged foods. If you are using it, don't let it get hot.


"04" - LDPE (low density polyethylene) Wrap 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 wrapped in plastic wrap is heated, and the fat in the food can easily dissolve the harmful substances in the wrap film. Therefore, when the food is placed in the microwave oven, the wrapped plastic wrap is first removed.


“05”——PP (Polypropylene) The microwave lunch box is made of this material. It is resistant to high temperatures of 130°C and has poor transparency. This is the only plastic box that can be placed in the microwave oven and can be reused after careful cleaning. It is necessary to pay special attention to some microwave oven lunch boxes, which are made of PP No. 05, but the cover is made of PS PS (polystyrene). The PS has good transparency but 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 the container in the microwave oven.


"06" - PS (Polystyrene) This is the material used to make bowled instant noodles and foamed snack boxes. It is also heat-resistant and cold-resistant, but it cannot be placed in a microwave oven to prevent the release of chemicals due to excessive temperature. It can not be used to contain strong acid (such as orange juice) and strong alkaline substances, because it will decompose polystyrene which 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 types of PCs are a widely used material, especially for the manufacture of baby bottles, space cups, etc., because of the controversy of containing 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 higher the temperature of bisphenol A remaining in PC, the more release and 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 any damage or breakage of the container is recommended, it is recommended to stop using it because the surface of the plastic product has fine pits and it is easy to hide bacteria. Avoid repeated use of aging plastic appliances.


Here are some common plastic products that may not carry any recycling identification code, but still have recycling value. Most waste recycling bins accept these items, so if you happen to have these plastics, make sure they get recycled.


PETE 1# : Soft drink bottle (cover), condiment (ketchup, salad dressing, peanut butter) container


LDPE 4#: frozen food bag, soft honey bottle, bread bag, waste paper basket


HDPE 2#: shampoo, kitchen cleaner, washing liquid container, plastic flower pot


PP 5#: broom handle, brush handle, tissue box, white pill bottle


V 3#: Fresh food bags, wire insulation, water pipes, water pipes, magnetic tape cassettes, CD cases, credit cards


PS 6#: ruler, ID set, foam, egg box.