17 Semi-processed or semi-finished plastics and or other polymers in the form of pellets, bars, blocks, rods, sheets, films, and tubes for use in manufacturing and packing; Plastic and elastomeric polymers in the form of pellets, bars, blocks, rods, sheets, films, and tubes for use in manufacturing and packing; Plastic and other polymers containing, at least in part, substances made by or derived from biological organisms and processes for use in manufacture; Semi-worked plastic and elastomeric polymer fibers and polymer resin fibers other than for use in textiles; Yarns of plastic and polymer fibers, other than for use in textiles, for use in manufacture