Packing and insulating materials; semi-finished products, namely, semi-processed synthetic resins; semi-finished goods, namely, filter materials in the nature of synthetic or mineral wools, fabrics, webs or felts for use in the manufacture of filter media; films and fabrics of metal or plastic for insulation and sealing purposes; inner sleeves, of plastic, for tanks for sealing and insulating the tank; semi-processed artificial resins, polyurethane film for use as building insulation, epoxy r...