Emndenini ovimbela umlilo, kune-MCA evimbela umlilo oshisayo eminyakeni yamuva nje, ngisho noma yayingekho. Ngakho-ke iyini i-MCA evimbela umlilo oshisayo ? Uyaqonda ukuthi isimiso se-flame retardant sicacile? Ake sibheke ndawonye!
Yiziphi i-nitrogen-based flame retardants?
Njengamanje, i-nitrogen-based retardants ye-flame ikakhulukazi ihlanganisa izigaba ezintathu: i-melamine, i-dicyandiamide, usawoti we-guanidine (i-guanidine carbonate, i-guanidine phosphate, i-guanidine phosphate condensed ne-guanidine sulfamate) kanye nokuphuma kwayo, ikakhulukazi okuphuma ku-phosphate.
- I-Melamine
I-Melamine ivamise ukusetshenziswa njengesakhi esigwebulile ekwakhiweni kwezingubo ezingashi, ezinomphumela omuhle wokukhihliza amagwebu kanye nokwakheka kwekhabhoni eminyene. Ngaphezu kokusetshenziswa njenge-flame retardant yodwa, izinhlobo ezivame ukusetshenziswa ezivimbela amalangabi ziwusawoti ophumayo okhiqizwa ukusabela nge-asidi futhi usetshenziswa kakhulu kumapulasitiki e-PE, PP kanye ne-PVC namanye amapulasitiki ashisayo kanye ne-thermosetting. Ihlanganiswe ne-liquid phosphate, i-melamine isetshenziswa kakhulu ku-flame retardant polyurethane foam.
- I-Dicyandiamide
I-Dicyandiamide isetshenziswa kakhulu ekwenzeni i-guanidinium salt flame retardants, engathatha indawo ye-melamine noma ihlanganiswe ne-melamine. Amalungelo obunikazi ase-Europe abika ukuthi i-dicyandiamide exutshwe ngezilinganiso ezilinganayo futhi yengezwe ku-5% ingenza i-polyamide ifinyelele umphumela we-UL94 V-0 we-flame retardant, futhi lesi sinqamuleli somlilo sinomthelela omncane emandleni okudabula okokusebenza. Ngaphezu kwalokho, i-dicyandiamide ingasetshenziswa ukwenza ingcina yezinkuni engashi.
- Guanidine usawoti
Ngaphandle kokusetshenziswa njengezimaphakathi zezidakamizwa nodayi, usawoti we-guanidine uvame ukusetshenziswa njengezinqamuleli zomlilo ezintweni ezisekelwe ku-cellulose, njengokhuni, iphepha kanye namakhadibhodi. Lawa ma-flame retardants anezindawo ezihlala isikhathi eside ezivimbela amalangabi futhi aphansi kakhulu kune-hygroscopic kune-inorganic flame retardants futhi anezici ezinhle zokuhlobisa, ngakho-ke asetshenziswa kabanzi ekwenzeni izinkuni zokuhlobisa ezisezingeni eliphezulu. Ngaphezu kwalokho, ingasetshenziswa futhi njengengxenye ye-ejenti enegwebu emigqonyeni ye-intumescent engenamlilo.
I-MCA iyi-additive flame retardant eyenziwe nge-melamine ne-cyanuric acid ezingeni lokushisa elithile futhi ihlanganiswe namanzi njengendlela ephakathi. Ayinabuthi, ayinaphunga futhi ayinambitheki, futhi inezinga lokushisa eliphezulu lokubola (lizinze kakhulu ku-300°C, libola ngaphezu kuka-600°C). Ayigcini nje ngokuba nomphumela omuhle we-flame-retardant, kodwa futhi inomusi omncane ngesikhathi sokucubungula, ukuhambisana okuhle nezinto ze-polymer futhi akukho mkhuba wokufuduka kwendawo. Isetshenziselwa ikakhulukazi i-flame retardant ye-nylon, i-PBT, i-PP, i-epoxy resin, i-organosilicon, i-polyurethane, irabha nezinye izinto ze-polymer. Umthelela wayo we-flame-retardant muhle, futhi ungaba nomphumela omuhle we-synergistic ne-phosphorus, i-bromine kanye ne-antimony flame retardants, futhi ingasetshenziswa ngokuhambisana nezinye izithasiselo ukuze uthole umphumela omuhle we-flame-retardant. Ngokombono wezomnotho, iyisinqamuleli somlilo esisebenza kakhulu sezinto zenayiloni. Imibhalo ibika ukuthi ukungezwa kwengxenyana engu-10% yesisindo se-MCA kunayiloni 6, inayiloni engu-66 noma imixube yakhona ingafinyelela izinga le-UL94 V-0 le-flame retardant.
Indlela yokubuyisela amalangabi
Ngokuvamile kunenkolelo yokuthi i-nitrogen flame retardants ijwayele ukukhipha amagesi angashi njenge-ammonia, i-nitrogen, ama-nitrogen oxides ajulile kanye nomhwamuko wamanzi lapho kuboliswa ukushisa. Ukukhiqizwa kwala magesi kanye nokubola kwezinqamuleli zomlilo kubamba ukushisa okuningi, kunciphisa kakhulu izinga lokushisa elingaphezulu kwe-polymer.
Futhi lawa magesi angashi, njenge-nitrogen, awagcini nje ngokudlala indima ekunciphiseni umoya-mpilo emoyeni kanye nokuhlushwa kwamagesi avuthayo akhiqizwa ukubola okushisayo kwama-polymers, kodwa futhi asabela nge-oksijini emoyeni ukuze akhiqize i-nitrogen, amanzi nama-oxide ajulile, adle umoya-mpilo phezu kwento ngenkathi efinyelela umphumela omuhle we-flame retardant.
Izinzuzo ze-flame retardant
- Ubuthi obuphansi
Ukuhlolwa kwezinto eziphilayo kubonisa ukuthi inkomba yobuthi ye-halogen flame retardants edingekayo ukuze kuzuzwe ukusebenza okufanayo kwe-flame-retadant iphindwe kahlanu kune-nitrogen flame retardants, futhi ukukhishwa kwentuthu yezinto ezisetshenziswayo ze-polymer ezilashwa nge-nitrogen flame retardants kuphansi, okwesibili kuphela kuma-fillers asekelwe ensimbi asekelwe kwi-inorganic flame-retardant. Ikakhulukazi, ukushuba kwentuthu ekuqaleni komlilo kuncane, okunikeza abantu ithuba lokubalekela nokwenza lula umsebenzi wokulwa nomlilo ekuqaleni.
- Ukusebenza kahle kwe-flame-retardant
Ngokusebenzisa ama-halides, ama-oxide ensimbi, ama-flame retardants e-phosphate, ama-hydrate e-inorganic, ama-hydroxyl compounds, ama-borides, ama-silicates, ama-carbonate compounds, ama-nitrogen compounds aqukethe isikhathi sokuthungela kanye nezinga elimangalisayo lokuhlola kubonisa ukuthi ukusebenza kahle kwe-nitrogen flame retardants kuphezulu kakhulu.
- Ukugqwala okuncane
- Amagesi akhiqizwa izinhlanganisela eziqukethe i-nitrogen ngesikhathi sokusha agqwala kakhulu futhi awanawo umthelela obalulekile wokugqwala emikhiqizweni kagesi. Ukuhlola kubonise ukuthi i-nitrogen-based flame retardant ephathwayo kagesi noma izingxenye zikagesi zingaqhubeka nokusetshenziswa ngemva komlilo.
- Akukho ukungqubuzana nokuqiniswa kokukhanya kokubalulekile
Izinqamuleli zamalangabi ezisekelwe ku-nitrogen azinawo amaqembu angakwazi ukukhiqiza kalula ama-radicals mahhala njenge-halides, ngakho-ke azisebenzisi iziqinisi zokukhanya kwezinye izinto.
- Izinga lokushisa eliphezulu lokubola okushisayo
Asikho isidingo sokukhathazeka mayelana nokubola kwe-flame-retardant ngesikhathi sokucutshungulwa kwento, okungase kuholele ekuhlulekeni kokuvimbela ilangabi. Izinto ezisetshenziswayo zigcina izakhiwo ezinhle zemishini kanye ne-flame retadancy ngisho nangemva kokukhishwa nge-extruder enemiphumela eminingi.
- Ubungane kumvelo
Udoti awubangeli ukungcoliswa kwemvelo.
Ulwazi olwengeziwe noma amasampula wamahhala noma izingcaphuno zamanani, sicela usithinte nge-imeyili: [email protected] , noma usithumelele izwi ku: +86-28-8411-1861.
Ezinye izithombe nemibhalo kukhiqizwa kabusha ku-inthanethi, futhi i-copyright ingeyombhali wokuqala. Uma kukhona ukwephulwa komthetho, sicela usithinte ukuze ukususe.