Digital printing fabrics are widely applied to banners in outdoors and also many wastes generated in digital fabric process are produced, however most of them are threw into fire or buried. It can also release more harmful gas into the air in the destructing process by fire. Digital printing fabrics are made the silica and several resins coated polyester textiles and most raw materials should be imported from overseas. So recycling technology is strongly demanded for wastes generated in digital printing fabric process. We investigated about recycled polyester from wastes of digital printing fabric by separating the polyester fabric and attached materials such as silica and several resins. We have setup the manufacturing system of eliminating process including steam condition, cleaning and drying process for it. We also developed the special chemical additives such as NaOH, surfactant and defoamer to eliminate the coating layer from the polyester textiles in digital printing fabric and also optimized formulation. As a result, we could obtain the recycled polyester textiles having eliminating rate of coating layer more than 95% and approximately equal performance to that of pure polyester textiles.

• Seokmoon Lee(Kumoh Institute of Technology)
• Hunsuk Koo(Korea Industrial Complex Corporation)
• Sangwon Ryu(Samil)