Floating anti-pollution barriers; marine pollution prevention membrane; plastic semi-worked products; plastic flat membrane; plastic flat sheets; plastic flat membrane for membrane element for water purification device; plastic flat membrane for membrane element for purification device for wastewater and/or sewage; filtering materials, semi-processed foams or films of plastic; filter material consisting of foamed plastics or plastic film semi-finished products; unprocessed porous membrane resin filter material; filtering materials for producing dust filters [semi-finished products]; chemical fiber, not for textile use; plastic fibers [fibres], not for textile use; rock wool; plastic sheeting for agricultural purposes; industrial adhesive tape; removable industrial adhesive tape; rubber; gum, raw or semi-worked; plastic substances, semi-processed