A cikin aikace-aikace kamar latsa mai zafi, na'ura mai zafi na lantarki, da kwantar da alluran da'ira, jinkirin harshen wuta, juriyar yanayin zafi, da konewar kayan kumfa kai tsaye suna ƙayyade haɗarin gobarar bita da yawan amfanin ƙasa. Kayayyakin yau da kullun na yau da kullun da ake samu akan kasuwa{2}}Kumfa EVA, kumfa EPDM, da harshen wuta{3}}kumfa silicone mai ɗorewa{4}} sun bambanta sosai a aikin juriyar harshensu. A ƙasa akwai cikakkiyar kwatancen da ke rufe ƙimar konewa, haɓakar yanayin zafi, gubar hayaki, da yanayin aiki masu dacewa.
一. Kumfa EVA (daidaitaccen kayan kumfa mai araha)
Native EVA abu ne mai ƙonewa sosai tare da matsanancin iskar oxygen na 17-19 kawai; Samfuran da ba a canza su ba sun haɗu da ƙimar ƙonewa na UL94 HB. Yana ci gaba da konewa yayin da yake buɗe wuta kuma yana narkewa cikin ɗigon ruwa wanda zai iya kunna bangon bango da kayan aiki, yana sakin hayaki mai ɗimbin yawa da mahadi masu rauni yayin konewa.
Ko da a lokacin da aka ƙara retardants na harshen wuta don samar da gyaggyarawa wuta - tsayayya EVA, kawai yana samun V{4}1/V-0 rating na ɗan lokaci kuma yana da babban lahani: ƙarƙashin tsayin daka zuwa yanayin zafi sama da digiri 80, filler na ciki mai ɗaukar wuta a hankali yana fita, yana haifar da saurin lalacewa bayan juriya mai zafi; a yanayin zafi da ya wuce digiri 120, kayan yana laushi kuma yana raguwa, yana sa shi gaba ɗaya bai dace ba don ci gaba da yanayin aiki mai zafi na PCB zafi presses (fiye da digiri 200).
Amfanin kawai shi ne ƙananan farashi; ya dace ne kawai don marufi na yanayi{0}}zazzabi da ƙananan ajiya{1}, kuma an haramta shi sosai don amfani a cikin manyan layin samar da zafi.
2. EPDM (Ethylene Propylene Diene Monomer) kumfa (gaba ɗaya - kumfa na hatimin HVAC )
EPDM yana fasalta tsarin cikakken tsarin kwayoyin halitta tare da juriyar yanayi na musamman da juriyar lemar ozone. Sigar da aka gyara ta ya dace da ka'idodin jinkirin harshen wuta na UL94 V-0, yana samar da kashin carbonized wanda ke hana yaduwar wuta yayin konewa yayin samar da ɗigon narke kaɗan da kuma nuna ƙarancin hayaki fiye da EVA.
Duk da haka, akwai ƙayyadaddun ƙayyadaddun ƙayyadaddun ƙayyadaddun ƙayyadaddun yanayin zafi: tsayin - tsayayyen yanayin zafin aiki ya bambanta daga{4}}digiri 40 zuwa digiri 120 , tare da gajeren lokaci - yanayin zafi mafi girma bai wuce digiri 175 ba. Ci gaba da bayyanar da yanayin zafi sama da digiri 180 a hankali zai haifar da laushi da asarar elasticity; harshen wuta{10}matsayin carbon ɗin na iya lalacewa kuma ya rabu a yanayin zafi sama da digiri 200, ta haka ya rasa damar kariyarsa ta wuta.
Ana amfani da shi da farko don tsarin kwandishan, rufin bututun bututu da rufewa, da kuma gajeriyar aikace-aikacen sanyaya zafin zafi na ɗan gajeren lokaci; duk da haka, bai dace da amfani da allunan multilayer na PCB ko manyan hanyoyin haɗin zafi na HDI{2} ba.
Kumfa EPDM tare da kumfa
3. Harshen harshen wuta{1}}Silicone kumfa mai ɗorewa (kayan da aka ba da shawarar don PCB maɗaurin soso)
An ƙirƙira shi musamman don aikace-aikacen masana'antu masu zafi, wannan kayan kumfa yana da ƙayyadaddun tsari wanda akai-akai ya dace da mafi girman ƙimar jinkirin wuta na UL94 V-0, yana mai da shi mafi cikakken zaɓin jure wuta tsakanin zaɓuɓɓuka uku da ake da su.
Halayen konewa: Da kansa -yana kashewa da sauri idan an tuntuɓar harshen wuta a cikin daƙiƙa 10, yana baje kolin iskar carbonation kaɗan ba tare da narkakkar digo mai konewa ba; yana samar da ƙananan hayaki, halogen -free kuma ba{3}}mai guba ba, kuma baya sakin iskar iskar gas da za ta iya cutar da foil ɗin tagulla ko allunan kewayawa.
Ƙunƙarar harshen wuta mai zafi{1}tabbatacciyar kwanciyar hankali: Yana jure tsawan lokaci ga yanayin zafi daga digiri 200-230, har ma ɗan gajeren lokaci - wuce gona da iri har zuwa digiri 250 a cikin latsawa baya haifar da laushi ko rushewa. Rufaffen tsarin sa na tantanin halitta yana ba da ɗorewa mai ɗorewa; harshen wuta -mai cikawa baya fita ko raguwa a yanayin zafi mai zafi, ba tare da wani gagarumin raguwar juriyar wuta ba bayan zagayowar matsar zafi sama da dubu.
Babban fa'idodi: sulfur -free kuma kyauta daga hazo, yana nuna babban juriya don amfani akai-akai yayin saduwa da manyan buƙatu guda uku{1}}lashin jinkirin harshen wuta, madaidaicin matsi mai daidaitawa, da tsayin{2}}juriya mai zafi{3} yana mai da shi dacewa da inganci mai girma aikace-aikacen rufewa.