Airborne nanoparticle concentrations in the manufacturing of polytetrafluoroethylene (PTFE) apparel.
Airborne nanoparticle concentrations in the manufacturing of polytetrafluoroethylene (PTFE) apparel.
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聚四氟乙烯 (PTFE) 服装制造过程中空气中纳米颗粒的浓度。
DOI：
10.1080/15459624.2011.554317
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发表时间：
2011
影响因子：
2
通讯作者：
Peters,ThomasM
中科院分区：
文献类型：
--
作者：
Vosburgh,DonnaJH;Boysen,DaneA;Oleson,JacobJ;Peters,ThomasM
一种形式的防水透气服装是使用特定工艺由聚四氟乙烯（PTFE）膜层压织物制造的，以密封已经用传统技术缝合的接缝。密封过程包括将防水胶带应用于接缝，通过两个辊将接缝送入，同时施加热空气（600°C）。本研究通过表征每天生产1000多件轻质PTFE防雨夹克的设施中的空气传播颗粒，解决了该密封过程中暴露于颗粒物的可能性。绘制了整个设施的气溶胶浓度图，测量了呼吸区浓度，并对用于密封接缝操作的通风罩进行了评价。缝纫和密封区域的几何平均（GM）粒子数浓度（67，000和188，000个粒子cm-3）显著高于办公区域的测量值（12，100个粒子cm-3）。整个设施的可吸入质量浓度可忽略不计（缝纫和密封区域的GM = 0.002 mg m− 3）。离开该设施的通风系统的最终排放的颗粒主要由纳米颗粒（数中值直径= 25 nm;几何标准偏差为1.39）。密封接缝的工人的呼吸区颗粒数浓度变化很大，密封接缝时比执行其他任务时显著更大（p < 0.0001）。密封工人的呼吸区浓度范围从147，000个粒子cm-3到798，000个粒子cm-3，他们的煤层责任显著影响他们的呼吸区浓度（p = 0.03）。结果表明，罩外和局部排气管道内的颗粒数浓度大致相等，这表明用于密封操作的遮篷罩的效果较差。
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−3in 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−3to 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.