A cikin iyalin masu hana harshen wuta, akwai MCA mai hana harshen wuta mai zafi a cikin 'yan shekarun nan, koda sau ɗaya a cikin ƙarancin wadata. To menene MCA mai hana harshen wuta ? Ka'idar mai hana harshen wuta a bayyane take? Bari mu duba tare!
Mene ne sinadaran hana harshen wuta da ke tushen nitrogen?
A halin yanzu, abubuwan hana harshen wuta da ke ɗauke da sinadarin nitrogen sun ƙunshi nau'i uku: melamine, dicyandiamide, gishirin guanidine (guanidine carbonate, guanidine phosphate, guanidine phosphate condensed da guanidine sulfamate) da kuma abubuwan da suka samo asali, musamman abubuwan da suka samo asali daga phosphate.
- Melamine
Ana amfani da Melamine sau da yawa a matsayin wani abu mai kumfa wajen kera murfin da ke hana wuta shiga, tare da kyakkyawan tasirin kumfa da kuma samuwar carbon mai yawa. Baya ga amfani da shi azaman mai hana wuta kawai, nau'in mai hana wuta da aka fi amfani da shi shine gishirin da aka samo ta hanyar amsawa da acid kuma ana amfani da shi sosai a cikin robobi na PE, PP da PVC da sauran robobi na thermoplastic da thermosetting. Idan aka haɗa shi da ruwa mai phosphate, ana amfani da melamine sosai a cikin kumfa mai hana wuta ta polyurethane.
- Dicyandiamide
Ana amfani da Dicyandiamide galibi wajen kera magungunan rage harshen wuta na gishirin guanidinium, waɗanda za su iya maye gurbin melamine ko kuma a haɗa su da melamine. Haƙƙin mallaka na Turai sun ba da rahoton cewa dicyandiamide da aka haɗa daidai gwargwado kuma aka ƙara a kashi 5% na iya sa polyamide ya sami tasirin hana harshen wuta na UL94 V-0, kuma wannan maganin hana harshen wuta ba shi da tasiri sosai kan ƙarfin yagewar kayan. Bugu da ƙari, ana iya amfani da dicyandiamide don yin manne mai hana wuta don itace.
- Gishirin Guanidine
Baya ga amfani da shi azaman matsakaici don magunguna da rini, ana amfani da gishirin guanidine a matsayin mai hana harshen wuta ga kayan da aka yi da cellulose, kamar itace, takarda da kwali. Waɗannan masu hana harshen wuta suna da kaddarorin hana harshen wuta na dogon lokaci kuma ba su da hygroscopic fiye da masu hana harshen wuta marasa tsari kuma suna da kyawawan halaye na ado, don haka ana amfani da su sosai wajen ƙera itacen ado mai inganci. Bugu da ƙari, ana iya amfani da shi azaman ɓangaren sinadarin kumfa a cikin rufin da ke hana harshen wuta.
MCA wani abu ne mai hana harshen wuta da aka yi da melamine da cyanuric acid a wani zafin jiki kuma an haɗa shi da ruwa a matsayin matsakaici. Ba shi da guba, ba shi da ƙamshi kuma ba shi da ɗanɗano, kuma yana da zafin ruɓewa mai yawa (yana da ƙarfi sosai a 300°C, yana ruɓewa sama da 600°C). Ba wai kawai yana da kyakkyawan tasirin hana harshen wuta ba, har ma yana da ƙaramin hayaƙi yayin sarrafawa, dacewa mai kyau da kayan polymer kuma babu wani abin da ke faruwa a saman ƙasa. Ana amfani da shi galibi don hana harshen wuta na nailan, PBT, PP, resin epoxy, organosilicon, polyurethane, roba da sauran kayan polymer. Tasirinsa na hana harshen wuta yana da kyau, kuma yana iya samun kyakkyawan tasirin haɗin gwiwa tare da phosphorus, bromine da antimony harshen wuta, kuma ana iya amfani da shi tare da wasu ƙari don samun kyakkyawan tasirin hana harshen wuta. Daga mahangar tattalin arziki, shine mafi kyawun maganin hana harshen wuta ga kayan nailan. Littattafan sun ba da rahoton cewa ƙara kashi 10% na yawan MCA zuwa nailan 6, nailan 66 ko gaurayawan su na iya cimma ma'aunin hana harshen wuta na UL94 V-0.
Injin hana wuta
Gabaɗaya ana kyautata zaton cewa masu hana harshen wuta na nitrogen suna da saurin fitar da iskar gas marasa ƙonewa kamar ammonia, nitrogen, nitrogen oxides masu zurfi da tururin ruwa lokacin da zafi ya ruɓe. Samar da waɗannan iskar gas da kuma ruɓewar masu hana harshen wuta suna shan mafi yawan zafi, wanda hakan ke rage zafin saman polymer sosai.
Kuma waɗannan iskar gas marasa ƙonewa, kamar nitrogen, ba wai kawai suna taka rawa wajen narkar da iskar oxygen a cikin iska da kuma yawan iskar gas masu ƙonewa da rugujewar zafi na polymers ke samarwa ba, har ma suna amsawa da iskar oxygen a cikin iska don samar da nitrogen, ruwa da kuma iskar oxides masu zurfi, suna cinye iskar oxygen a saman kayan yayin da suke cimma kyakkyawan tasirin hana harshen wuta.
fa'idodin hana harshen wuta
- Ƙananan guba
Gwaje-gwajen halittu sun nuna cewa ma'aunin guba na masu hana harshen halogen da ake buƙata don cimma irin wannan aikin hana harshen wuta ya ninka na masu hana harshen wuta na nitrogen sau biyar, kuma fitar da hayakin da ke fitowa daga kayan polymer da aka yi wa magani da masu hana harshen wuta na nitrogen yana da ƙasa, wanda ya fi na ƙarfe girma. Musamman ma, yawan hayakin da ke fitowa daga farkon wutar ƙarami ne, wanda ke ba mutane damar tserewa da kuma sauƙaƙe aikin yaƙi da wutar a farkonta.
- Babban inganci mai saurin wuta
Ta hanyar gwajin halides, ƙarfe oxides, phosphate flame retardants, inorganic hydrates, hydroxyl mahadi, borides, silicates, carbonate mahadi, nitrogen mahadi dauke da lokacin ƙonewa da kuma exothermic rate na gwajin ya nuna cewa ingancin nitrogen retardants harshen wuta shine mafi girma.
- Ba ya lalatawa sosai
- Iskar gas da mahaɗan da ke ɗauke da nitrogen ke samarwa yayin ƙonewa suna da ƙarfi sosai kuma ba su da wani tasiri mai yawa ga kayayyakin lantarki. Gwaje-gwaje sun nuna cewa ana iya ci gaba da amfani da na'urorin lantarki masu hana harshen wuta da aka yi wa magani da sinadarin nitrogen ko kuma abubuwan lantarki bayan gobara.
- Babu rikici da masu daidaita haske a cikin kayan aiki
Masu hana harshen wuta da ke ɗauke da sinadarin Nitrogen ba su da ƙungiyoyin da za su iya samar da ƙwayoyin cuta masu sauƙin lalacewa kamar halides, don haka ba sa cinye masu daidaita haske a wasu kayan aiki.
- Zafin zafi mai zafi mai yawa
Babu buƙatar damuwa game da ruɓewar da ke hana harshen wuta yayin sarrafa kayan, wanda zai iya haifar da gazawar mai hana harshen wuta. Kayan yana riƙe da kyawawan halaye na injiniya da kuma hana harshen wuta koda bayan an fitar da shi ta hanyar mai fitar da abubuwa masu tasiri da yawa.
- Mai sada zumunci da muhalli
Sharar ba ta haifar da gurɓatar muhalli ba.
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