聚氯乙烯焊接烟雾中的氯乙烯单体及其他污染物。

Vinyl chloride monomer and other contaminants in PVC welding fumes.

作者信息

Williamson J, Kavanagh B

出版信息

Am Ind Hyg Assoc J. 1987 May;48(5):432-6. doi: 10.1080/15298668791384995.

Abstract

An investigation into the nature of fumes produced during thermal welding of plasticized PVC sheeting has been carried out with the objective of determining if the known carcinogen vinyl chloride monomer (VCM) is formed and to assess the level of exposure to the operator. The results show that the atmospheric concentrations of VCM are well below accepted occupational exposure limits. This finding is consistent with reports in the technical literature which suggest that VCM is produced during thermal degradation of PVC only at temperatures considerably higher than those encountered during plastic welding.

摘要

针对增塑聚氯乙烯薄膜热焊接过程中产生的烟雾性质展开了一项调查，目的是确定是否会形成已知致癌物氯乙烯单体（VCM），并评估操作人员的接触水平。结果表明，VCM的大气浓度远低于公认的职业接触限值。这一发现与技术文献中的报道一致，这些报道表明，PVC热降解过程中仅在远高于塑料焊接过程中所遇温度的情况下才会产生VCM。