PVC e kile ea e-ba polasetiki e kholo ka ho fetisisa lefatšeng ka bophara ho etsoa le ho sebelisoa haholo. E sebelisoa haholo ho thepa ea kaho, lihlahisoa tsa indasteri, litlhoko tsa letsatsi le letsatsi, letlalo la fatše, lithaele tsa fatše, letlalo la maiketsetso, liphaephe, lithapo le likhoele, lifilimi tsa ho paka, libotlolo, thepa e phophomang, thepa ea ho tiisa, likhoele le masimo a mang.
Leha ho le joalo, ka la 27 Mphalane 2017, lenane la carcinogen le hatisitsoeng ke Setsi sa Machaba sa Lipatlisiso ka Kankere ea Mokhatlo oa Lefatše oa Bophelo (WHO) le ile la kopanngoa le ho hlalosoa pele, 'me PVC e kenyelelitsoe lethathamong la Class 3 carcinogen.Vinyl chloride, e le thepa e tala bakeng sa motsoako oa PVC, e thathamisitsoe lethathamong la Class I carcinogen.
01 Mehloli ea lintho tsa vinyl chloride lihlahisoa tsa lieta
Vinyl chloride, eo hape e tsejoang e le vinyl chloride, ke motsoako oa organic o nang le foromo ea lik'hemik'hale C2H3Cl. Ke monomer ea bohlokoa k'hemistri ea polymer mme e ka fumanoa ho tsoa ho ethylene kapa acetylene. E sebelisoa haholo ho etsa li-homopolymers le copolymers tsa polyvinyl chloride. E ka boela ea etsoa copolymerized ka vinyl acetate, butadiene, joalo-joalo, 'me e ka boela ea e-ba teng.se sebedisoang joalo ka ntho e ntshang dae le dinoko.E ka boela ea sebelisoa e le motsoako oa li-polymer tse fapaneng. Le hoja vinyl chloride e le thepa ea bohlokoa e tala indastering ea polasetiki, e ka boela ea sebelisoa e le sehatsetsi, joalo-joalo E ka boela ea sebelisoa e le ntho e ntšang dae le linoko. Ha ho etsoa lihlahisoa tsa lieta le liaparo, vinyl chloride e sebelisetsoa ho hlahisa polyvinyl chloride (PVC) le li-polymers tsa vinyl, tse ka bang thepa e thata kapa e tenyetsehang. Tšebeliso e ka bang teng ea PVC e kenyelletsa khatiso ea skrine ea polasetiki, likarolo tsa polasetiki, le liphahlo tse fapaneng tsa letlalo, letlalo la maiketsetso le masela.
Masala a vinyl chloride monomer ka har'a thepa e entsoeng ka vinyl chloride e ka lokolloa butle-butle ka har'a thepa, e nang le tšusumetso ho bophelo bo botle ba bareki le tikolohong ea tikoloho.
02 Likotsi tsa lintho tsa vinyl chloride
Vinyl chloride e ka kenya letsoho liketsong tsa mosi oa photochemical tikolohong, empa ka lebaka la ho feto-fetoha ha eona ho matla, e tloaetse ho etsa photolysis sepakapakeng. Vinyl chloride monomer e beha likotsi tse fapaneng ho basebetsi le bareki, ho latela mofuta oa monoma le tsela ea ho pepeseha. Chloroethylene ke khase e se nang 'mala mocheso oa kamore, e nang le monate o fokolang o ka bang 3000 ppm. Ho pepeseha ho matla (nako e khutšoane) maemong a phahameng a vinyl chloride moeeng ho ka ba le litlamorao tsamaisong ea methapo e bohareng (CNS),joalo ka ho tsekela, ho otsela, le hlooho e opang. Ho hema ka nako e telele le ho pepesehela vinyl chloride ho ka baka mofetše oa sebete.
Hajoale, limmaraka tsa Europe le Amerika li tsepamisitse maikutlo ts'ebelisong ea vinyl chloride monomers ka thepa ea PVC le thepa ea bona, 'me e kentse tšebetsong taolo ea molao. Mefuta e tsebahalang haholo ea machabeng e hloka hore lisebelisoa tsa PVC li haneloe lihlahisoa tsa bona tsa bareki. Haeba PVC kapa thepa e nang le PVC e hlokahala ka lebaka la mabaka a theknoloji, litaba tsa vinyl chloride monomers ka thepa li tlameha ho laoloa. The International RSL Management Working Group for Clothing and Footwear AFIRM, Khatiso ea 7th 2022, e hloka horelitaba tsa VCM ka thepa ha lia lokela ho feta 1ppm.
Baetsi le likhoebo li lokela ho matlafatsa taolo ea phepelo ea thepa,e tsepamisitse maikutlo haholo le ho laola litaba tsa vinyl chloride monomers ka thepa ea PVC, khatiso ea skrine ea polasetiki, likarolo tsa polasetiki, le liphahlo tse fapaneng tsa PVC letlalong, letlalo la maiketsetso le masela.. Ka nako e ts'oanang, hoa hlokahala ho ela hloko ntlafatso ea lits'ebetso tsa tlhahiso, ho ntlafatsa sistimi ea taolo ea boleng, le ho ntlafatsa le ho feta boemo ba polokeho ea sehlahisoa le boleng ho latela litlhoko tse nepahetseng tsa taolo.
Nako ea poso: Apr-14-2023