Ngaba ii-Phosphorus-Nitrogen Flame Retardants zingafikelela kwi-V0 Rating kwiSilicone Rubber?
Xa abathengi bebuza malunga nokusebenzisa kuphela i-aluminium hypophosphite (AHP) okanye i-AHP + MCA indibaniselwano ye-halogen-free flame retardancy kwirabha ye-silicone ukuze kufezekiswe i-V0 rating, impendulo ithi ewe—kodwa kufuneka uhlengahlengiso lwedosi ngokusekelwe kwiimfuno ze-flame retardancy. Apha ngezantsi kukho iingcebiso ezithile kwiimeko ezahlukeneyo:
1. Ukusebenzisa iAluminium Hypophosphite (AHP) Yodwa
Iimeko ezisebenzayo: Kwiimfuno ze-UL94 V-1/V-2 okanye usetyenziso olubuthathaka kwimithombo ye-nitrogen (umz., ukuphepha iziphumo zegwebu ezivela kwi-MCA ezinokuchaphazela imbonakalo).
Indlela ecetyiswayo:
- Irabha esisiseko: Irabha ye-silicone ye-Methyl vinyl (VMQ, 100 phr)
- I-aluminium hypophosphite (AHP): 20–30 phr
- Umxholo ophezulu we-phosphorus (40%); i-20 ph inika umxholo we-phosphorus ongama-8% ekuthinteleni ilangatye.
- Kwi-UL94 V-0, yonyuka iye kwi-30 phr (ingachaphazela iimpawu zoomatshini).
- Isithambisi sokuqinisa: I-Fumed silica (10–15 phr, igcina amandla)
- Izongezo: Ioyile ye-Hydroxyl silicone (2 phr, iphucula ukucubungula) + i-ejenti yokunyanga (inkqubo ye-peroxide okanye yeplatinum)
Iimpawu:
- I-AHP yodwa ixhomekeke kwi-condensed-phase flame retardancy (char formation), iphucula kakhulu i-oxygen index (LOI) yerabha ye-silicone kodwa ngokunciphisa umsi.
- Umthamo ophezulu (>25 phr) unokunyusa ubulukhuni bezinto; ukongeza i-3-5 phr zinc borate kunokuphucula umgangatho womaleko we-char.
2. Umxube we-AHP + MCA
Iimeko ezisebenzayo: Iimfuno ze-UL94 V-0, ezijolise kwidosi ephantsi yokongeza kunye nentsebenziswano ethintela ilangatye yesigaba segesi.
Indlela ecetyiswayo:
- Irabha esisiseko: VMQ (100 phr)
- I-aluminium hypophosphite (AHP): 12–15 phr
- Inika umthombo we-phosphorus, ikhuthaza ukwakheka kwe-char.
- I-MCA: 8–10 izifundo
- Umthombo we-nitrogen uhambelana ne-AHP (isiphumo se-PN), ukhupha iigesi ezingasebenziyo (umz., i-NH₃) ukuze kuthintelwe ukusasazeka komlilo.
- Isithambisi sokuqinisa: I-Fumed silica (10 phr)
- Izongezo: Iarhente yokudibanisa iSilane (1 phr, iphucula ukusasazeka) + iarhente yokunyanga
Iimpawu:
- Idosi iyonke ethintela ilangatye: ~20–25 phr, iphantsi kakhulu kune-AHP yodwa.
- I-MCA iyanciphisa idosi ye-AHP kodwa inokuchaphazela kancinci ukucaca (i-nano-MCA iyacetyiswa ukuba ukucaca kuyadingeka).
3. Uthelekiso lweeParamitha eziPhambili
| Ukwenziwa kwefomyula | Ukulinda komlilo okulindelekileyo | Idosi iyonke (phr) | Iingenelo kunye neengozi |
|---|---|---|---|
| I-AHP yodwa (iiphr ezingama-20) | UL94 V-1 | 20 | Ixabiso eliphantsi, elilula; i-V-0 ifuna i-≥30 phr, kunye nokwehla kokusebenza. |
| I-AHP yodwa (30 phr) | UL94 V-0 | 30 | Ubushushu obuphezulu kodwa ubunzima obuphezulu kunye nobude obunciphileyo. |
| I-AHP 15 + i-MCA 10 | UL94 V-0 | 25 | Isiphumo sokusebenzisana, ukusebenza okulungeleleneyo—kucetyiswa kwiimvavanyo zokuqala. |
4. Iingcebiso zovavanyo
- Uvavanyo oluphambili lwe-AHP + MCA (15+10 phr): Ukuba i-V-0 ifikelelwe, yehlisa i-AHP kancinci kancinci (umz., 12+10).
- Ukuqinisekiswa kwe-AHP yodwa: Qala kwi-20 phr, yonyuswe nge-5 phr ngovavanyo ngalunye ukuze kuvavanywe i-LOI kunye ne-UL94, kujongwe utshintsho lweempawu zoomatshini.
- Iimfuno zokunciphisa umsi: Yongeza i-3-5 phr zinc borate kwezi fomyula zingasentla ukuze unciphise umsi ngaphandle kokuphazamisa ukulibaziseka komlilo.
5. I-Ammonium Polyphosphate Egqunywe Ngeengubo
Sinabathengi abasebenzisa i-TF-201G ngempumelelo kwirabha ye-silicon.
Ukuze uphucule ngakumbi, cinga ngokufaka izixa ezincinci ze-aluminium hydroxide (10–15 phr) ukunciphisa iindleko zizonke, nangona oku kwandisa umxholo opheleleyo wokuzalisa.
More inof., pls contact lucy@taifeng-fr.com
Ixesha leposi: Julayi-25-2025
