Xana u nga antswisa njhani ku tiya ka mahiselo ya rhaba?
Ku lwisana na ku dyuhala ka moya wo hisa kumbe ku dyuhala hi ku hisa swiya swiva swa nkoka swinene, ngopfu ngopfu eka switirhisiwa swa mimovha laha swiphemu swa rhaba switirhisiwa ngopfu eka tindzhawu leti funengetiweke letingana mahiselo yale henhla ya ndzhawu. Vaendli va timovha va twe ntshikilelo lowu andzaka wo tinyiketela ku hanya vutomi byo leha bya swiphemu swa vona swa rhaba. Swihlawulekisi swa ku dyuhala ka ku hisa ka anaerobic na swivumbeko swa ku dyuhala ka ku hisa na moya swa hambana. Rhaba yina ku tiya ko antswa ka kuhisa, kambe yinga ha tsandzeka ku tiyisela nhlaselo wa oxygen.
Xiya: Tiphurothokholo leti ta xikambelo xo angarhela ti nga ha va ti nga tirhi eka xiyimo xin’wana na xin’wana xo karhi. Xin’wana na xin’wana xa swilo leswi cinca cincaka lexi nga antswisaka ku lwisana na ku dyuhala ka moya kumbe ku lwisana na ku dyuhala ka ku hisa hakunene xi ta khumba swivumbeko swin’wana, ku nga va ku antswa kumbe ku biha.
1. Xitirhisiwa xa perfluoroelastomer
Loko swilo swa rhaba swilaveka kuva swikota ku tiya swinene, ufanele ku hlawula rhaba leyingana perfluorinated. Ku vikiwa leswaku mahiselo ya matirhiselo ya perfluoroelastomer ya fika eka 316°C.
2、 Raba ya fluorine
Fluorine rubber FKM yina ku tiya swinene ka kuhisa, naswona yinga tirhisiwa eka mahiselo yofika eka 260°C. Leswaku u ya emahlweni u tiyisisa ku tiya ka mahiselo yale henhla ya rhaba ya fluorine, ufanele ku hlawula acid acceptor leyi faneleke (acid absorbent), kufana na magnesium oxide ya ntirho wale hansi, magnesium oxide ya ntirho wale henhla, calcium oxide, calcium hydroxide, zinc oxide, etc. Matirhelo ya fluoroelastomer’s heat resistant air aging performance na yona ya kahle swinene, naswona mahiselo yaku tirhisiwa yanga va yale henhla swinene kufana na 200°C. Hiku hlawula bisphenol AF tani hi vulcanization system, ku tiya ka ku dyuhala ka kuhisa ka rhaba swita antswa. Yitirhisiwa eka ndzhawu yo tika ya oyili ya njhini, ku tiya ka ku dyuhala ka kuhisa ka ternary fluoroelastomer leyi endliweke kusuka eka vinylidene fluoride, tetrafluoroethylene na propylene swa antswa kutlula fluoroelastomer hiku angarhela. Leswi swivangiwa hiku cinciwa ka hexafluoropropylene hi propylene eka maendlelo ya polymerization.
3、 Xihlamusela-marito xa HNBR
Loko degree ya hydrogenation yiri e henhla, ku tiya ka kuhisa ka HNBR ku antswa, hikuva kwalomu ka kungari na unsaturated double bond eka main chain leyinga tshamisekangiki. Ti HNBR tin’wana ta ha kota ku vulcanized hi sulphur hikuva ta ha ri na ti unsaturated double bonds tin’wana. Hambiswiritano, loko yi vulcanized hi peroxide, ku tiya ka ku hisa ka compound ku ta antswisiwa. Eka rhaba ya HNBR, TOTM yinga nyika ku tiya ka kuhisa ko antswa kutlula DOP hikokwalaho ka volatility yale hansi xikan’we na ntiko wale henhla wa molecular weight ya ti trioctyl plasticizers leti.
4. Xitirhisiwa xa neoprene
W-type neoprene yina ku tiya ko antswa ka ku dyuhala ka kuhisa kutlula G-type neoprene. Diphenylamine octanoate i antioxidant yo antswa eka neoprene, leyi nga antswisaka kahle ku tiya ka kuhisa.
5、 EPDM ya xitsonga
EPDM yahari na ku tiya ka kahle ka kuhisa eka 125°C endzhaku ka ku ringanela loku faneleke. Ku tirhisiwa ka peroxide vulcanized EPDM, swinga endla leswaku rhaba yiva na ku tiya ko antswa ka kuhisa.
6、 Ndlela ya xiphemu xa vapor ya viscosity ya le hansi EPDM
Nhlayo yale henhla ya ethylene xikan’we na ultra-low viscosity vapor phase EPDM, yinga tatiwa hi nhlayo leyikulu ya ti fillers, hikokwalaho ka nhlayo yale henhla ya ethylene, ku lulamisiwa aswi lavi ku joyina ku lulamisiwa ka ku dyuhala ka moya lowu lwisanaka na kuhisa swinga tsakisi naswona resin, yahari kona swinga endla leswaku rhaba yiva na swivumbeko swa kahle swo lulamisa, hikokwalaho ku tiya ka xiviri ka kuhisa ka rhaba swa antswisiwa.
7、 Papalata ku tirhisa resin ya styrene ya le henhla
Papalata ku chela resin ya styrene yale henhla eka rhaba leyi tirhisiwaka eka mahiselo yale henhla.
8、 Xigwitsirisi xa Talcum
Eka rhaba ya hose ya EPDM, cinca 40% wa carbon black hi talcum powder, leswinga antswisaka ku tiya ka ku dyuhala ka kuhisa ka rhaba. Ti grade tin’wana ta talcum powder tina swipfuno leswi xiyekaka kutlula vumba lebyi tshunguriweke kumbe lebyi nga tshunguriwangiki eka mhaka leyi.
9、 Xitirhisiwa xa plastiki xa viscosity yale henhla
Exikarhi ka ti plasticizers, ti plasticizers ta viscosity yale henhla tinga nyika ku tiya ka ku dyuhala ka kuhisa kutlula ti plasticizers ta viscosity yale hansi. Hikuva high viscosity plasticizer hi ntolovelo yina molecular weight yale henhla, ayi olovi ku yi volatilize, xisweswo yitshamiseka kahle xikan’we naku tiya kahle eka kuhisa.
10、Mafurha ya mbewu ya rape ya neoprene
Leswaku neoprene yiva na resilience yo antswa, mafurha ya canola ya laveka hikuva yana viscosity yale hansi, leswi endlaka leswaku rhaba yiva na hysteresis yale hansi xikan’we na volatility yale hansi, leswinga endla leswaku rhaba yiva na ku tiya ka kahle ka ku dyuhala.
11、Sisiteme ya EV/semi-effective SEV vulcanization leyi tirhaka
Eka sisiteme ya vulcanization leyi tirhaka kumbe semi-effective, ratio ya accelerator na sulphur yile henhla, leswivulaka leswaku, 'high promotion na low sulphur' system, na 'sulphur kuya emirini' ematshan'wini ya single sulphur, eka sisiteme leyi ya vulcanization, xiphemu xa single sulphur bond na double sulphur bond eka rhaba leyi vulcanized yile henhla, hikokwalaho ka ku tshamiseka ka yona Eka vulcanization leyi system, ratio ya single sulphur bond na double sulphur bond yile henhla kutlula ya multi-sulphur bond, hikokwalaho, ku tiya ka ku tiya ka ku hisa ka rhaba swa antswisiwa naswona ku tiya ka ku dyuhala ka kuhisa swa antswisiwa.
12、Okisayidi ya zinki
Vulcanization / sub-sulfuramide vulcanization system ya rhaba, leyi tatiweke hi zinc oxide yotala, yinga nyika rhaba swivumbeko swo antswa swa ku dyuhala hi kuhisa xikan’we naku tiya swinene eka post-sulphur.
13、Peroxide vulcanized EPDM rhaba
Eka peroxide vulcanized EPDM compound, ZMTI yi hlawuriwa tani hi antioxidant, leswinga nyikaka compound modulus yale henhla xikan’we naku lwisana na ku dyuhala ka kuhisa.
