Control of air contaminants at mixers and mills used in tire manufacturing.
Heitbrink-WA; McKinnery-WN Jr.
Am Ind Hyg Assoc J 1986 Jun; 47(6):312-321
Methods of controlling air contaminants at Banbury mixers and mills used in the tire manufacturing industry (SIC-3011) were described as the result of a study conducted by NIOSH during the period 1978 to 1982. Banbury mixers and the mills located beneath them are normally used to mix elastomers, and other ingredients into a homogeneous mixture. These operations create aerosols, which may escape into the factory atmosphere when materials are transferred during steps in processing. At Banbury mixers, substitution, isolation, and local exhaust ventilation were employed to control air contaminants. Local exhaust ventilation could isolate the worker from the air contaminants created by mixer operation. Dust released when feeding material into the mixer could be controlled by substituting equipment or material or by changing equipment configurations. Practically all the local exhaust systems studied controlled the emissions they were designed to control. Large (factor of more than 5) differences in respirable particulates were found in personal sampling of workers at factories with different Banbury mixture operational configurations. The authors conclude that the air sampling results show that the worker must be physically isolated from the air contaminants before the ventilation system can protect the worker.
NIOSH-Author; Control-technology; Rubber-processing-equipment; Industrial-dusts; Airborne-dusts; Ventilation-equipment; Dust-control-equipment
Control Technology and Personal Protective Equipment; Research Tools and Approaches; Control-technology
American Industrial Hygiene Association Journal