PPE-个人防护用品分类
一、防护头盔
在生产现场,为防止意外重物坠落击伤、生产中不慎撞伤头部,或防止有害物质的污染,劳动者应当佩戴安全防护头盔。我国国家标准GB2811—81对安全头盔的形式、颜色、耐冲击、耐燃烧、耐低温、绝缘等技术性能有专门的规定。
根据用途,防护头盔可分为单纯式和组合式两类。
(一)单纯式有:一般建筑工人、煤矿工人佩戴的帽盔,用于防重物坠落砸伤头部;机械、化工等工厂用于防污染用的以棉布或合成纤维制成的带舌帽
(二)组合式的有:1、电焊工安全防护帽,防护帽和电焊工面罩连为一体,起到保护头部和眼睛的作用;2、矿用安全防尘帽,由滤尘帽盔和口鼻罩及其附件组成。防尘帽盔包括外盔、内帽和帽衬,外盔和内帽滤层,将夹层空间分隔为过滤外腔和过滤内腔。帽盔前端设进气孔,连通外腔,内腔设出气孔,于帽盔两侧与橡胶导气管连接,再通往口鼻罩。口鼻罩按一般人面型设计,接面严密,并设呼气阀。每当吸气时,含尘空气通过外盔上的进气孔进入过滤外腔,透过高效过滤层净化后进入过滤内腔,将净化后的空气再经出气孔橡胶导气管、口鼻罩进入呼吸道,呼出气由呼气阀排出。3、防尘防噪声安全帽,为安全防尘帽上加上防噪声耳罩。
二、防护服
防护服包括帽、衣、裤、围裙、鞋罩等,有防止或减轻热辐射、X-射线、微波辐射和化学物污染机体的作用
(一)防热服
防热服应具有隔热、阻燃、牢固的性能,但又应透气,穿着舒适,便于穿脱;可分为非调节和空气调节式两种。
1.非调节防热服:(1)阻燃防热服:用经阻燃剂处理的棉布制成,不仅保持了天然棉布的舒适、耐用和耐洗性,而且不会聚集静电,在直接接触火焰或炽热物体后,能延缓蔓延,使衣物炭化形成隔离层,不仅有隔热作用,而且不致由于衣料燃烧或暗燃而产生继发性灾害,适用于有明火、散发火花或在熔融金属附近操作以及在易燃物质并有发火危险的场所工作时穿着。(2)铝箔防热服:能反射绝大部分热辐射而起到隔热作用,缺点是透气性差。可在防热服内穿一件由细小竹段或芦苇编制的帘子背心,以利通风透气和增强汗液蒸发。(3)白帆布防热服:经济耐用,但防热辐射作用远比不上前两种。
2.空气调节防热服:可分为通风服和制冷服两种。(1)通风服:将冷却空气用空气压缩机压入防热服内,吸收热量后从排气阀排出。通风服需很长的风管,只适于固定的作业。还有一种装有微型风扇的通风服,直接向服装间层送风,增加其透气性而起到隔热作用。(2)制冷服:又可分为液体制冷服、干冰降温服和冷冻服,基本原理一致,不同处是防热服内分别装有低温无毒盐溶液、干冰、冰块的袋子或容器,最实用者为装有冰袋的冷冻服。
(二)防化学污染物的服装
一般有两类:一类是用涂有对所防化学物不渗透或渗透率小的聚合物化纤和天然织物做成,并经某种助剂浸轧或防水涂层处理,以提高其抗透过能力,如喷洒农药人员防护服;另一类是以丙纶、涤纶或氯纶等织物制作,用以防酸碱。对这些防护服,国家有一定的透气、透湿、防油拒水、防酸碱及防特定毒物透过的标准。
(三)微波屏蔽服
有两类:1、金属丝布微波屏蔽服:是用柞蚕铜丝拼捻而制成,具有反射屏蔽作用。2、镀金属布微波屏蔽服:以化学镀铜(镍)导电布为屏蔽层,衣服外层为有一定介电绝缘性能的涤棉布,内层为真丝薄绸衬里。这种屏蔽服具有镀层不易脱落、比较柔软舒适、重量轻等特点,是目前较新,效果较好的一种防微波屏蔽服。
(四)防尘服
一般用较致密的棉布、麻布或帆布制作。需具有良好的透气性和防尘性,式样有连身式和分身式两种,袖口、裤口均须扎紧,用双层扣,即扣外再缝上盖布加扣,以防粉尘进入。
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