Ukhuseleko lomlilo luyinto ebalulekileyo kwishishini lokwakha, nto leyo ebangela imfuno yezinto ezisebenza kakuhle ezingatshiyo ezinokumelana namaqondo obushushu aphezulu, ukusasazeka kancinci komlilo, kunye nokunciphisa ukudluliselwa kobushushu. Ii-mica flakes ezingatshiyo, ezinozinzo olukhethekileyo lobushushu (ukumelana namaqondo obushushu ukuya kuthi ga kwi-1200°C), ukuhanjiswa kobushushu obuphantsi, kunye neempawu ezingatshiyo, ziye zavela njengesongezelelo esibalulekileyo ekwakheni izinto ezingatshiyo. Ngokungafaniyo nezinto ezithintela umlilo ezenziweyo ezinokukhupha iigesi ezinobuthi xa zitshisiwe, ii-mica flakes zendalo, azinabuthi, kwaye zigcina ulwakhiwo lwazo nokuba kushushu kakhulu, nto leyo ezenza zilungele iingcango zomlilo, amakhethini omlilo, kunye neepaneli zokukhusela udonga.

Kwimveliso yeengcango zomlilo, ii-mica flakes zixutywa nefayibha yomthi okanye ifayibha yeminerali ukwenza izinto eziphambili ezimelana nomlilo. Xa i-20%-30% yee-mica flakes ezimelana nomlilo (ubukhulu bamasuntswana angama-40-80 μm) zongezwa kwizinto eziphambili, umlinganiselo wokumelana nomlilo womnyango womlilo unokuphuculwa ukusuka kwimizuzu engama-30 ukuya kwimizuzu engama-90-120. Oku kungenxa yokuba ii-mica flakes zenza umaleko oxineneyo, okhusela ubushushu xa ubekwe emlilweni, uthintela ukudluliselwa kobushushu kwaye uthintele ucango ukuba lungatshi okanye ludilike. Umenzi wezixhobo zokwakha e-UK uvavanye iingcango zethu zomlilo eziqiniswe yi-mica phantsi kweemeko zomlilo eziqhelekileyo (ISO 834): iingcango zigcine uzinzo lwazo lwesakhiwo kangangemizuzu eli-110, ubushushu obungasemva buhlala bungaphantsi kwe-140°C (umda wokusasazeka komlilo), zidlula iimfuno zeengcango zomlilo zeClass B.

Ngaphezu koko, iingcango zomlilo ezinee-mica flakes zibonakalise ukusebenza kakuhle kwiimeko zomlilo zokwenyani. Kumlilo wesakhiwo sezindlu esineemigangatho emininzi eOstreliya, iingcango zomlilo ezinee-mica flakes zilibazise ukusasazeka komlilo nomsi, nto leyo evumela abemi ukuba baphume ngokukhuselekileyo. Emva komlilo, kwafunyaniswa ukuba ezi ngcango zigcine inxalenye enkulu yesakhiwo sazo, nto leyo eyanceda ekunciphiseni umonakalo omkhulu kwisakhiwo.

Ukongeza, ii-mica flakes ziphucula amandla oomatshini ee-cores zomnyango womlilo, zinciphisa ukugoba nokuqhekeka ngexesha lokufakwa nokusetyenziswa. Isakhiwo esidibeneyo esenziwe zii-mica flakes ngaphakathi kwezinto eziphambili sisebenza njengenethiwekhi yokuqinisa, sibonelela ngenkxaso eyongezelelweyo kunye nozinzo. Oku akupheleli nje ekunyuseni ukumelana nomlilo kodwa kwandisa nobomi benkonzo yeengcango zomlilo.

Kwizikheni zomlilo—izithintelo eziguquguqukayo ezisetyenziselwa ukuvala iindawo ezisengozini yomlilo kwizakhiwo zorhwebo—izikheni ze-mica zigqunywa kwilaphu ezimelana nobushushu obuphezulu ezifana nefayibha yeglasi okanye ifayibha ye-aramid. Isigqubuthelo se-mica (esine-50%-60% ye-mica flakes) sisebenza njengesikhuselo sobushushu, sibonakalisa ukuya kuthi ga kwi-85% yobushushu obukhanyayo kwaye sithintela ilaphu ukuba linganyibiliki. Ivenkile enkulu eSpain ifake izikheni zomlilo eziphathwe ngezikheni zethu ze-mica ezimelana nomlilo: ngexesha lovavanyo lomlilo olulinganisiweyo, izikheni zamisa ukusasazeka kwamalangatye kangangemizuzu engama-80, zibonelela ngexesha elaneleyo lokuphuma kunye nokucima umlilo.

Ngaphezu koko, uphando lubonise ukuba indlela ezibekwe ngayo ii-mica flakes kwi-coating inokuchaphazela kakhulu ukusebenza kwee-fire curtains. Xa ii-mica flakes zilungelelaniswe kakuhle ngexesha lenkqubo yokugquma, zinokwenza umqobo osebenzayo ngakumbi kubushushu nakumalangatye. Iqela lethu le-R&D liphuhlise inkqubo yokugquma eyahlukileyo eqinisekisa indlela efanelekileyo yokugquma ii-flakes, nto leyo eyenza ukuba ii-curtains zikwazi ukumelana nomlilo.

Ngokungafaniyo neengubo zemveli zomlilo eziwohlokayo emva kokusetyenziswa okuphindaphindiweyo, iingubo ezisekelwe kwi-mica zihlala ixesha elide, zigcina iimpawu zazo ezingatshiyo ukuya kuthi ga kwiminyaka eli-10 ngaphandle kokulungiswa kakhulu. Olu bomi bude lwenza iikhethini zomlilo ezifakwe kwi-mica zibe sisisombululo esingabizi kakhulu kwizakhiwo zorhwebo, nto leyo enciphisa isidingo sokutshintshwa rhoqo kunye neendleko zokulungisa ezinxulumene noko.

Kwiiphaneli zokuthintela udonga, ii-mica flakes zifakwa kwizinto zokuthintela ubushushu ezisekelwe kwi-gypsum okanye kwisamente ukuze kuphuculwe ukuthintela ubushushu kunye nokumelana nomlilo. Ukongeza i-15%-25% yee-mica flakes kwiiphaneli zokuthintela ubushushu ze-gypsum kunciphisa ukuhanjiswa kobushushu ukusuka kwi-0.17 W/(m·K) ukuya kwi-0.12 W/(m·K), kuphucula ukusebenza kakuhle kwamandla nge-25%-30%. Kwangaxeshanye, ukumelana nomlilo kweephaneli kuphucuka kakhulu—azivuthisi okanye zikhuphe umsi onobuthi xa zichatshazelwe kumlilo ovulekileyo, zihlangabezana nemigangatho yokhuseleko lomlilo engqongqo ye-European Union (EN 13501-1) kunye ne-United States (ASTM E84).

Ukongeza ekuphuculeni ukumelana nomlilo kunye nokuthintela ubushushu, ii-mica flakes zikwanegalelo ekusebenzeni kwe-acoustic kweepaneli zokuthintela udonga. Ulwakhiwo oluqhekekileyo lwe-mica lunceda ukufunxa nokunciphisa amaza esandi, kunciphisa ukudluliselwa kwengxolo phakathi kwamagumbi. Oku kwenza iipaneli zokuthintela ubushushu eziqiniswe yi-mica zibe lukhetho olufanelekileyo kwizakhiwo apho ukuthintela isandi kukwayinto ephambili, njengeehotele, izikolo kunye nezibhedlele.

Iprojekthi yokwakha izindlu eJamani isebenzise ezi paneli zokukhusela eziqiniswe nge-mica: izakhiwo zifumene i-BREEAM Excellent rating yokusebenzisa kakuhle amandla, kwaye uvavanyo lokhuseleko lomlilo luqinisekisile ukuba ezi paneli zinegalelo ekunciphiseni umngcipheko wokusasazeka komlilo ngama-40% xa kuthelekiswa nokukhusela okuqhelekileyo. Impumelelo yale projekthi ikhokelele ekukhuleni komdla kwiipaneli zokukhusela eziqiniswe nge-mica kulo lonke elaseYurophu, kunye nabaphuhlisi abaninzi kunye nabakhi abazichazayo kwiiprojekthi zabo.

Iiflakes zethu ze-mica ezingatshiyo zifumaneka kwiindidi ezimbini: iiflakes ze-muscovite mica ezingatshiyo kakhulu (ezizinzileyo ukuya kuthi ga kwi-750°C) kunye neeflakes ze-phlogopite mica ezishushu kakhulu (ezizinzileyo ukuya kuthi ga kwi-1200°C). Izalathisi zobugcisa eziphambili ziquka: umxholo wokufuma ≤0.3%, umxholo womlotha ≤0.5%, ukuqhuba kobushushu ≤0.08 W/(m·K), kunye novavanyo lokurhoxiswa komlilo (UL94) V-0. Zonke iimveliso zivavanyelwa nzima, kubandakanya uvavanyo lokuzinza kobushushu (kwisithando somlilo esingenasici), uvavanyo lokusasazeka komlilo (kusetyenziswa i-cone calorimeter), kunye novavanyo lokukhutshwa kwegesi enobuthi (ngokuhambelana ne-ISO 19702), ukuqinisekisa ukuthotyelwa kwemigaqo yokhuseleko lomlilo yehlabathi.

Ukuqinisekisa umgangatho kunye nokuhambelana kwee-mica flakes zethu, siqalise inkqubo engqongqo yokulawula umgangatho kuzo zonke izigaba zemveliso. Ukususela ekufumaneni izinto eziluhlaza ukuya ekupakishweni kokugqibela, iqela ngalinye lee-mica flakes lihlolwa kwaye livavanywe ngononophelo.

Sinikezela ngenkxaso eyenzelwe abavelisi bezixhobo zokwakha. Kubavelisi beengcango zomlilo, sicebisa ukusebenzisa ii-phlogopite mica flakes kwiisicelo zobushushu obuphezulu kwaye sincede ekwenzeni ngcono umlinganiselo wokuxuba ukuze kulinganiswe ukumelana nomlilo kunye neendleko. Kwiingubo zelaphu zekhethini lomlilo, sinikezela ngee-micac flakes ze-micronized (ubukhulu beenxalenye ze-particle 10-20 μm) ezenza uqweqwe olugudileyo nolufanayo ngaphandle kokuchaphazela ukuguquguquka kwelaphu. Iqela lethu lobuchwephesha likwaqhuba uqeqesho kwindawo malunga neendlela zokusasazwa kwe-mica flake, ukuqinisekisa ukusasazwa ngokulinganayo kwezixhobo ukuze kuthintelwe iindawo ezibuthathaka ekumelaneni nomlilo.

Ukongeza kwinkxaso yobugcisa, sikwabonelela ngeenkonzo zophuhliso lwemveliso ezenzelwe wena. Ukuba abathengi baneemfuno ezithile zeempawu ze-mica flake, ezinje ngokusasazwa kobukhulu beesuntswana, unyango lomphezulu, okanye umbala, iqela lethu le-R&D lingasebenzisana nabo ngokusondeleyo ukuphuhlisa isisombululo esenziwe ngokwezifiso. Olu kuguquguquka lusenza sikwazi ukuhlangabezana neemfuno ezahlukeneyo zabathengi bethu kushishino lwezixhobo zokwakha.

Kwizinto zothutho, sisebenzisa ukupakisha okuvalwe ngobushushu, okungenamanzi (25 kg/ibhegi) ukuthintela ii-mica flakes ekufunxeni umswakama, nto leyo enokunciphisa ukusebenza kwazo okungatshiyo. Sisebenzisana neenkampani zokuthutha ezigxile kwizixhobo zokwakha, sizisa iimveliso eYurophu, eMntla Melika, nakuMbindi Mpuma kwiintsuku ezingama-20-35.