Airborne Nanoparticle Concentrations in the Manufacturing of Polytetrafluoroethylene (PTFE) Apparel.
One form of waterproof, breathable apparel is manufactured from polytetrafluoroethylene (PTFE) membrane laminated fabric using a specific process to seal seams that have been sewn with traditional techniques. The sealing process involves applying waterproof tape to the seam by feeding the seam throu...
| Publicado en: | Journal of Occupational & Environmental Hygiene Vol. 8; no. 3; pp. 139 - 147 |
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| Autores principales: | , , , |
| Formato: | CEU research tables/charts Journal Article |
| Publicado: |
Taylor & Francis Ltd
Mar2011
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| Acceso en línea: | Ver este registro en EBSCOhost |
| fields | @attributes: recordID: 1 pdfLink: plink: https://search.ebscohost.com/login.aspx?direct=true&db=ccm&AN=104564976&site=ehost-live header: @attributes: shortDbName: ccm uiTerm: 104564976 longDbName: CINAHL Complete uiTag: AN controlInfo: bkinfo: dissinfo: jinfo: jid: 15459624 V1L jtl: Journal of Occupational & Environmental Hygiene issn: 15459624 maglogo: Y pubinfo: dt: Mar2011 vid: 8 iid: 3 pid: 377 pub: Taylor & Francis Ltd place: Philadelphia, Pennsylvania artinfo: ui: 104564976 75127910 10.1080/15459624.2011.554317 NLM21347955 104564976 ppf: 139 ppct: 8 formats: fmt: @attributes: type: P tig: atl: Airborne Nanoparticle Concentrations in the Manufacturing of Polytetrafluoroethylene (PTFE) Apparel. aug: au: Vosburgh, Donna J. H. Boysen, Dane A. Oleson, Jacob J. Peters, Thomas M. affil: Department of Occupational and Environmental Health, The University of Iowa, Iowa City, Iowa sug: subj: Polytetrafluoroethylene Analysis Occupational Exposure Evaluation Funding Source Human Education, Continuing (Credit) Descriptive Statistics P-Value Videorecording Repeated Measures T-Tests One-Way Analysis of Variance Post Hoc Analysis Data Analysis, Statistical Data Analysis Software Confidence Intervals ab: One form of waterproof, breathable apparel is manufactured from polytetrafluoroethylene (PTFE) membrane laminated fabric using a specific process to seal seams that have been sewn with traditional techniques. The sealing process involves applying waterproof tape to the seam by feeding the seam through two rollers while applying hot air (600°C). This study addressed the potential for exposure to particulate matter from this sealing process by characterizing airborne particles in a facility that produces more than 1000 lightweight PTFE rain jackets per day. Aerosol concentrations throughout the facility were mapped, breathing zone concentrations were measured, and hoods used to ventilate the seam sealing operation were evaluated. The geometric mean (GM) particle number concentrations were substantially greater in the sewing and sealing areas (67,000 and 188,000 particles cm-3) compared with that measured in the office area (12,100 particles cm-3). Respirable mass concentrations were negligible throughout the facility (GM = 0.002 mg m-3 in the sewing and sealing areas). The particles exiting the final discharge of the facility's ventilation system were dominated by nanoparticles (number median diameter = 25 nm; geometric standard deviation of 1.39). The breathing zone particle number concentrations of the workers who sealed the sewn seams were highly variable and significantly greater when sealing seams than when conducting other tasks (p < 0.0001). The sealing workers' breathing zone concentrations ranged from 147,000 particles cm-3 to 798,000 particles cm-3, and their seam responsibility significantly influenced their breathing zone concentrations (p = 0.03). The finding that particle number concentrations were approximately equal outside the hood and inside the local exhaust duct indicated poor effectiveness of the canopy hoods used to ventilate sealing operations. pubtype: Academic Journal doctype: CEU research tables/charts Journal Article ougenre: Article language: English refInfo: holdings: @attributes: islocal: N |
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