What are the grades of plastics from 1 to 7?
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, some post consumer plastic and it is difficult to simply be distinguished by the appearance, therefore, the best in the plastic products marked material varieties.
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.
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.
