B PERFORMING OPERATIONS; TRANSPORTING
B29 WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
B29K INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR; MOULDS,; REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
B29K2509/00 Use of inorganic materials not provided for in groups; B29K2503/00 - B29K2507/00,; as filler