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Document ID (ISN)106641
CIS number 07-632
ISSN - Serial title 1077-3525 - International Journal of Occupational and Environmental Health
Year 2006
Convention or series no.
Author(s) Sakai K., Hisanaga N., Shibata E., Ono Y., Takeuchi Y.
Title Asbestos exposures during reprocessing of automobile brakes and clutches
Bibliographic information Apr.-June 2006, Vol.12, No.2, p.95-105. Illus. 29 ref.
Abstract This study investigated asbestos exposures of workers in three small factories reprocessing automobile brakes and clutches in Japan. Airborne asbestos was collected on a membrane filter using an air sampler. Asbestos counting was performed on 295 samples using phase contrast microscopy. Only chrysotile asbestos was detected. Workers who reprocessed automobile brakes and clutches were exposed to asbestos concentrations of between 0.025 and 76.4 fibres/cm3. Geometric mean asbestos concentrations during attaching linings to brake shoes and attaching facings to clutch disks were 0.859 and 0.780 fibres/cm3, respectively. Concentrations during stripping worn brake linings and clutch facings were 0.484 and 0.382 fibres/cm3, respectively. Machine grinding and levelling of new brake lining surfaces represent potential sources of heavy asbestos exposures, unless enclosures and local ventilation are efficient.
Descriptors (primary) small enterprises; motor vehicle industry; exposure evaluation; asbestos
Descriptors (secondary) exhaust hoods; local exhaust; personal sampling; brake linings; determination in air; Japan; chrysotile; clutches; breathing atmosphere; fibre counts
Document type D - Periodical articles
Country / State or ProvinceJapan
Subject(s) Metal production and metalworking
Toxic and dangerous substances
Broad subject area(s) Chemical safety
Browse category(ies) Small and medium-sized enterprises
Motor vehicle manufacturing industry
Exposure evaluation