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目的分析液晶显示面板生产项目中氧化铟锡(ITO)靶材维护保养时铟的职业病危害。方法采取现场职业卫生调查方法,根据国家现行职业卫生标准进行工作场所空气中铟水平检测,对45名维护人员采用电感耦合等离子体-质谱法检测血铟水平,并进行胸部CT检查。结果阵列、彩色滤光片和电容式触摸显示屏工序ITO靶材打磨工作岗位空气中铟的时间加权平均浓度(CTWA)和短时间接触浓度(CSTEL)存在超标情况,CTWA、CSTEL的最大值分别为2.98和10.20 mg/m3,最大超标倍数分别为28.8和33.0倍。45名ITO靶材维护人员胸部CT均未见异常;阵列和彩色滤光片工序的42名维护人员均未检出血铟,电容式触摸显示屏工序的3名维护人员均检出血铟(血铟水平为0.39~1.73μg/L),检出率为6.7%。结论该液晶显示面板生产项目ITO靶材维护保养时存在铟的职业病危害,应严格按管理制度操作,加强维护人员的个人防护,控制维护频率与持续时间,保障维护人员的职业健康。
Objective To analyze the occupational hazards of indium in the maintenance of indium tin oxide (ITO) targets in the production of liquid crystal display panels. Methods On-the-spot occupational health survey was used to detect indium levels in the workplace air according to the current national occupational health standards. 45 maintenance workers were tested for blood indium levels by inductively coupled plasma-mass spectrometry and chest CT. Results Array, Color Filter, and Capacitive Touch Screen Process ITO Target Sampling Exhausted concentrations of indium in the air at work (CTWA) and short-term exposure concentrations (CSTEL) were excessive, with the maximum values for CTWA and CSTEL being For 2.98 and 10.20 mg / m3, respectively, with the maximum exceeding multiple of 28.8 and 33.0 times respectively. Forty-five ITO target maintainers showed no abnormalities in their thoracic CT images. None of the 42 maintenance personnel in the array and color filter processes detected blood indium. Three maintenance personnel in the capacitive touch display process detected blood indium Level of 0.39 ~ 1.73μg / L), the detection rate was 6.7%. Conclusion The indium occupational hazards posed by ITO targets during the maintenance of ITO liquid crystal display project should be strictly controlled by the management system. Personal protection of maintenance personnel should be strengthened, frequency and duration of maintenance should be controlled, and occupational health of maintenance personnel should be protected.