plastics in extruded form for use in manufacture; packing, stopping and insulating materials; flexible pipes, not of metal; plastic film and fibre not for textile use, plastic sheeting pipes and rods in this class, plastic substances, semi-processed; packing's not of metal for pipes, synthetic lining materials, artificial resins (semi-processed); adhesive tapes in this class; acrylic resins (semi-processed) all being goods in this class