... type of common type,high resistance,chemical treated etc. could be dry-compounded or co-extruded compound,use for food,medicine,cosmetics ... type of common type,high resistance,chemical treated etc. could be dry-compounded or co-extruded compound,use for food,medicine, ... type of common type,high resistance,chemical treated etc. could be dry-compounded or co-extruded compound,use for food,medicine, ...