Plastic type marking code
The United States Plastics Industry Association (Society of Plastics Industry, SPI) made use of plastic products of plastic type sign code, is composed of representatives of the circular triangle in the middle of the three arrows mark, plus the numbers, they will recover triangle marking attached to the plastic products, and with the numbers 1 to 7 and English abbreviations to refer to the use of plastic resin type generation. As a result, the identification of plastic varieties has become simple and easy, and the cost of recycling has been substantially reduced. Today, many countries in the world have adopted the SPI logo scheme. China enacted almost identical labeling standards in 1996.
The first goal of plastic packaging waste treatment is to recycle and reuse containers and other resources, so as to protect the limited resources and complete the recycling of packaging containers. Among them, carbonated drinks with PET (polyethylene terephthalate) bottle 28% can be recycled, PE-HD milk bottles (HDPE), PE-HD bottles can also be effectively recycled.
In order to facilitate the regeneration of various post consumer plastic products will need to use different kinds of plastic sorting, because the plastic consumption channels and more complex, som
e post consumer plastic and it is difficult to simply be distinguished by the appearance, therefore, the best in the plastic products marked material varieties. You ask, what are the different codes, what are their advantages and
disadvantages? The following will help you understand this:
Abbreviations and symbols - code and the corresponding plastic name as shown below:
Polyester - 01 - PET (bottle) such as mineral water, carbonated beverage bottles
卡农吉他谱Do not use hot water in the beverage bottle
Use: heat resistance to 70 degrees, only suitable for warm drinks or frozen drinks, high temperature liquid, or heating, it is easy to deformation, there are harmful substances melting. And, scientists have found that after 1 months of use of plastic, may release a carcinogen, DEHP, which is toxic to the testes.
As a result, when the bottle is used up, it is thrown away. It should not be used as a water cup, or used as a storage container to carry other articles, so as not to cause health problems.
HDPE - 02 - HDPE, such as cleaning products and bath products Cleaning is not thorough, it is recommended not to recycle
Usage: can be reused after careful cleaning, but these containers are usually not good cleaning, residual original cleaning supplies, become a hotbed of bacteria, you'd better not recycle.
Polyvinyl chloride - - 03 - PVC, such as: some decorative materials
Use: this material is easy to produce harmful substances at high temperatures, and even in the process of manufacturing it will be released, toxic substances into the human body with food, may cause breast cancer, neonatal congenital defects and other diseases. At present, this kind of material has few containers for packing food. Never use it if it is in use.
Low density polyethylene - 04 - LDPE, such as: plastic film, plastic film, etc.
Keep the plastic wrap on the surface of the food
Use: heat resistance is not strong, usually qualified PE cling film in case of temperature over 110 degrees of hot melt phenomenon, will leave some of the body can not be decomposed plastic preparations. And wrap the food with plastic wrap to heat it. The grease in the food easily dissolves t
he harmful substances in the preservative film. Therefore, the food into the microwave oven, it is necessary to remove the wrapped plastic wrap.
Polypropylene - - - 05 - PP (capable of more than 100 degrees of temperature), such as: microwave oven boxes
Put the lid off when you put it in the microwave oven
Use: the only plastic box that can be placed in a microwave oven. It can be reused after careful cleaning. Special attention should be paid to some microwave oven boxes. The box is made of No. 5 PP, but the box cover is made of No. 1 PE. Because the洪湖水浪打浪简谱
PE can not withstand high temperature, it can not be put into the microwave oven with the box. For insurance purposes, put the container in front of the microwave oven and remove the lid first.
Polystyrene - - 06 - PS (heat resistant 60-70 degrees, hot drinks will produce toxins,
Combustion will release styrene, such as: bowl, instant noodles box, snack box
Don't microwave a bowl of instant noodles
Usage: heat resistant and cold resistant, but not put into microwave oven, so as not to release chemicals because of excessive temperature. And can not be used for loading strong acid (such as Liu Chengzhi), strong alkaline material, because it will decompose the human body bad polystyrene, easy to cause cancer. So try to avoid hot food packed in a snack bar.
吻别吉他谱Other plastic codes - 07 - Others, such as water bottles, water bottles, bottles
PC rubber meets bisphenol A
Use: a widely used material, especially in bottles, which is controversial because of bisphenol A. Department of biology and chemistry, City University Hong Kong associate professor Lin Hanhua said, in theory, as long as in the process of making PC, bisphenol A 100 into plastic products structure, said no bisphenol A, not to mention the release. However, if a small
amount of bisphenol A is not converted into a plastic structure of PC, it may be released into the food or drink. Therefore, be careful and pay more attention to the use of this plastic container.
Cleaning measures against bisphenol A:
Bisphenol A residues in PC, the higher the temperature, the faster speed of release. Therefore, hot
water should not be used in PC bottles to avoid increasing the speed and concentration of bisphenol A (if any). If your kettle is numbered 7, the following methods can reduce the risk:
Don't heat it when using.
Clean the kettle without using a dishwasher or a bowl machine.
错的时间遇上错的你Keep the kettle out of direct sunlight.
before using for the first time, rinse with baking soda and warm water and dry naturally at room temperature. Because bisphenol A will be released more often for the first time and for long term use.
if the container has any falls or breakage, it is recommended to discontinue use, because it is easy to trap bacteria if there are fine pits on the surface of the plastic.
charmerAvoid repeated use of aged plastic appliances.
The PP, PE, and PVC are abbreviations of the English names. The
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