CD recycling polymerized carbonate plastic

A recent survey conducted by the German Ministry of Environment showed that only 5,000 tons of CDs are collected and recycled every year in Germany, where the use of CDs is huge. The German Ministry of the Environment believes that people have not yet realized the environmental value of CD recycling and called for people to pass CDs. The proper way to collect, because the disc is composed of 99% of polymer carbonate plastic, metal protective layer (aluminum), a small amount of surface lacquer and ink composition. The recycling of optical discs can result in a lot of polymerized carbonate plastics, which are high quality plastics that can be used as raw materials to produce medical devices, automobiles and computers, which can save a lot of raw material oil. However, how to separate the aluminum protective layer from the plastic on the surface of the optical disc has become a difficult point in the recycling of the optical disc. The aluminum protective layer is quite thin, but adheres strongly to the surface of the optical disc. Lime water and some special additives must be added to separate it. , 1,000 tons of CD-ROM recycling, can only get 100 kg of aluminum, the market price of these aluminum is only about 100 euros, but you can get a lot of high-quality polymer carbonate plastic for computer housing and automotive parts production .

At present, there are many professional CD recycling companies in Germany. The German Ministry of Environment established a German-wide CD recycling system in June 1997 and has an official website. People can learn about these recycling companies from the website. The recycling system thus discards the disc to the designated location. Bayer, the world's largest producer of polymeric carbonates, is a raw material supplier to many optical disk manufacturers. As early as 1994, it began recycling CDs in Germany. Bayer has one in Dumagan. The CD recycling company, which has a circulation capacity of 6,000 tons, has so far recycled 335 million optical discs and produced 5,000 tons of polymerized carbonate plastic.

At the same time, some companies have begun to recycle optical discs to save energy and enhance their environmental image. For example, Sony recycles used discs to produce new disc cases.