PVB (polyvinyl butyral) is expensive and has recycled value. However, there is no recycling system of waste automotive and building laminated glass in Taiwan. Domestic producer of PVB application products are mainly imported recycled PVB from abroad. It is a pity that there are about 300~400 thousand end-of-life vehicles (ELVs) generated in Taiwan each year, with 300-400 tons of discarded PVB within laminated glass (3,300~4,400 tons), all entering the automobile shredder residue (ASR) by means of waste incineration. If we can develope a PVB recovery technology of laminated glass of automotive waste, we can establish the recycling system in Taiwan, in addition to reducing the amount of ASR. This project has developed the PVB recycling technology of waste automotive laminated glass in Taiwan. This project has firstly disassembed the windscreens of ELVs in the ELVs recovery factory. Afterward, Industrial Techloogy Research Institute (ITRI) has established the designation of PVB recovery process (separation and purification, etc.). A PVB recovery pilot plant test has also been proceeded. Finally, a recycling PVB application product has been demonstrated. This project had disassembed and separated 120 pieces windscreens of ELVs , and 66 Kg of PVB have been recovery. After purification, the recycling PVB are comparable to the properties of recycling PVB abroad. The recycling PVB is expected to be used by domestic PVB application product factory. Using the recycling PVB, 20 Kg of PVB leather and briefcase had been produced. A five-stage separating flowsheet of windscreens of ELVs have been proposed.

Laminated glass of automotive waste, Polyvinyl butyral, Recycling