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塑料工业是当今世界上发展速度较快的领域之一。塑料制品品种多、价廉物美从而在国民经济中赢得了广泛市场。它不仅代替了大量的金属、木材、皮革、棉花等天然材料而且在很多地方起到了独特的作用。聚氯乙烯是最常用而且产量又非常多的塑料之一,约占整个塑料生产的20％。过去认为它对各化学物质属惰性,不易经皮肤或消化道侵入机体,因此认为是无毒物。聚氯乙烯是由氯乙烯聚合而成的白色粉末,在盛袋包装或拆袋配料时,作业场所粉尘飞扬。吸入肺泡的聚氯乙烯其颗粒大小一般为0.5×0.3～1.0×0.3μm,也有小至0.1μm。
The plastics industry is one of the fastest growing areas in the world today. Plastic products variety, cheap and thus won in the national economy, a broad market. It not only replaces a lot of natural materials such as metal, wood, leather, cotton, but also plays a unique role in many places. Polyvinyl chloride is one of the most commonly used and very productive plastics, accounting for about 20% of the total plastic production. In the past that it is inert to the chemical substances, not easy to invade the body through the skin or digestive tract, it is considered non-toxic. Polyvinyl chloride is a white powder polymerized from vinyl chloride, dusting in the workplace when bagging or unpacking ingredients. Inhalation of alveolar polyvinyl chloride particle size is generally 0.5 × 0.3 ~ 1.0 × 0.3μm, but also as small as 0.1μm.