Novel Principle for Mechanical Recycling of Carpet Waste Using Pressure Shear Pulverization Process
MetadataShow full item record
A proprietary Pressure Shear Pulverization (PSP) process based on Bridgmen Effect (combined action of pressure and shear forces) was developed for mechanical recycling by pulverization of various single and mixed thermoplastic and thermosetting waste, as well as polymer composites. For this study the PSP process has been used for recycling post-consume PVC-PET carpet waste. Using the PSP lab-scale machine, a fine commingled powder was produced. SEM analysis demonstrates that the powder consists of very fine PVC flake-type particles (size of 300 microns) and very short PET fiber-type particles (size of 0.5-1.0 mm). For further compression molding processing of the secondary polymeric items, the mechanically recycled powder has been applied using two approaches. First, commingled powder was used as a filler to produce composites based on PVC binder (virgin or waste one). Second, separated by shaking sieve technique PET fibers or PVC particles were used as fillers or co-components for PET or PVC binders (virgin or waste ones). Both secondary solid and foamed materials might be produced. Thus, the PSP method represents a new alternative for mechanical recycling of carpet waste using a very inexpensive and environmentally friendly technique.