17 Semi-worked synthetic plastic and synthetic resins as semi-finished products in form of pellets, rods, foils, foams, fibers, films and sheets; semi-processed resins; semi-processed natural resins; semi-processed synthetic resins; resins in bars, block, pellets, rods, sheets and tubes for general industrial use; resins in extruded form for general industrial use; acrylic resin sheeting for use in the manufacture of laminated glass