17 Semi-processed plastic materials for use in manufacturing; elastomeric polymers in the form of sheets, strips, cells, layers, and blocks for use in manufacturing; polymeric and elastomeric materials, foamed or unfoamed, in the form of sheets, strips, cells, layers, and blocks for use in manufacturing; semi-processed plastics in the form of profiles, sections, tubes, blocks, rods, sheets, mats, laminates, films, and fibres, all of plastics and all for use in manufacturing; padding, packing, stopping, stuffing, sealing, filling, insulating, shock-absorbing and impact-absorbing materials of plastic and/or rubber; padding of plastic and/or rubber for impact protection; insulating materials; foam rubber; shock buffers of plastic and/or rubber for industrial machinery; flexible pipes and hoses, not of metal; elastomeric polymers in the form of sheets, strips, cells, layers, and blocks for use in the manufacture of impact-absorbing materials, protective cases, clothing, footwear, headgear and articles for protection against injury or accident, body, limb and head protectors, protective helmets, body armour, cushioning devices for medical use, and clothing, footwear, headgear, sportswear and underwear