1AugPREVIEW: The use of poly polyethylene terephthalate (PET) for packaging has seen tremendous growth that can be attributed to the material’s ability to offer light weighting options, unique container designs, clarity, long shelf life (using special additives and/ or multilayer structures) and recyclability. But unfortunately, only non-colored and lightly-tinted blue PET bottles offer reclaimers a high value
31JulPREVIEW: One of the problems that limits the amount of recycled PET (rPET) used in rigid packaging applications is the degree of yellowness that it can cause. The more rPET that is added to virgin PET during bottle manufacture, the more yellow the resulting bottle tends to become. The source of the rPET used has
31JulPREVIEW: One of the primary issues that recyclers face today is the challenge to produce high-quality recycled polyethylene terephthalate (rPET) with low b* (yellow) values. This study wanted to example the effect that repeated melting of PET resins has on color. The trend seen shows (with some sample variability) that the yellowness, measured by b*, increases with
