Blister tshuab los tsim cov ntawv yas chloride yog dav siv

Polyvinyl chloride yas khoom siv dav siv, tab sis nyob rau hauv nruab nrab -1970s, nws tau lees paub tias cov monomer vinyl chloride (VCM) seem nyob rau hauv polyvinyl chloride resins thiab cov khoom yog ib tug loj carcinogen, uas yuav undoubtedly cuam tshuam polyvinyl chloride rau ib tug yam twg. Kev loj hlob ntawm vinyl chloride. Txawm li cas los xij, tib neeg tau ua tiav txo qhov seem ntawm VCM los ntawm lub tsheb, kom cov ntsiab lus ntawm VCM hauv polyvinyl chloride resin yuav tsawg dua 10ppm, uas ua tau raws li cov cai ntawm cov khoom siv huv huv thiab nthuav dav daim ntawv thov ntawm polyvinyl chloride. Txawm tias VCM cov ntsiab lus hauv cov resin tuaj yeem tsawg dua 5ppm, thiab cov seem VCM tom qab ua tiav tsawg heev. Nws yog qhov tsis muaj teeb meem rau tib neeg lub cev thiab tuaj yeem siv los ua zaub mov thiab ntim tshuaj thiab cov khoom ua si menyuam yaus.