Ifomyula ethintela ilangatye esetyenziswa kwi-SK Polyester ES500 (UL94 V0 rating).
I. Indlela yoYilo loYilo
- Ukuhambelana kweSubstrate
- I-SK Polyester ES500: I-polyester ye-thermoplastic enobushushu obuqhelekileyo bokucubungula obuyi-220–260°C. I-flame retardant kufuneka imelane nolu luhlu lobushushu.
- Iimfuno eziphambili: Ukulinganisela ukuthintela ilangabi (V0), iimpawu zoomatshini (amandla okuxinana/okuchaphazela), kunye nokugeleza kokucubungula.
- Inkqubo yokuBuyisela ilangatye ehambelanayo
- I-Ultrafine Aluminium Hydroxide (ATH): I-primary flame retardant, endothermic dehydration. Ukulayisha kufuneka kulungelelanise i-flame retardancy kunye neempawu zoomatshini.
- I-Aluminium Hypophosphite: I-Char-forming synergist, isebenza ne-ATH ukudala isiphumo se-phosphorus-aluminium synergistic, iphucula umgangatho we-char.
- I-Zinc Borate: I-Char enhancer, ithintela umsi, kwaye yenza umqobo oxineneyo nge-ATH.
- I-MCA (iMelamine Cyanurate): Ithintela ilangatye elingaphantsi kwegesi, inciphisa ioksijini kwaye ithintele ukuvuza kwencibiliko.
II. Ukwenziwa Okucetyiswayo (Ipesenti Yobunzima)
| Icandelo | Umlinganiselo | Amanqaku okuCwangcisa |
|---|---|---|
| I-SK Polyester ES500 | 45–50% | I-resin esisiseko; khetha umgangatho wokunyibilika okuphezulu ukuze ubuyisele i-viscosity yokuzalisa. |
| I-ATH ecocekileyo kakhulu | 25–30% | Umphezulu oguqulwe nge-arhente yokudibanisa i-silane (KH-550), D50 < 3 μm. |
| I-Aluminium Hypophosphite | 10–12% | Ayinabushushu (>300°C), ixutywe kwangaphambili ne-ATH kwaye yongezwa ngokwamanqanaba. |
| I-Zinc Borate | 6–8% | Yongezwe kunye ne-MCA ukuze kuthintelwe umonakalo omkhulu kwisakhiwo. |
| I-MCA | 4–5% | Ubushushu benkqubo <250°C, ukusasazeka ngesantya esiphantsi. |
| Umsasazi | 2–3% | Isinyibilikisi esihambelana nepolyester (umz., i-BYK-161) + i-polyethylene wax composite. |
| Iarhente yokudibanisa (KH-550) | 1% | Inyanga i-ATH kunye ne-aluminium hypophosphite kwangaphambili; ukuntywiliselwa kwi-ethanol kulandele ukomiswa. |
| Iarhente Yokuchasa Ukuvuza | 0.5–1% | I-PTFE micropowder yokuthintela ukutsha okunyibilikisiweyo. |
| Uncedo Lokucubungula | 0.5% | I-Zinc stearate (ukuthambisa kunye nokunganamatheli). |
III. Ulawulo lweNkqubo oluPhambili
- Ukuphuculwa koSasazo
- Ngaphambi konyango: Nciphisa i-ATH kunye ne-aluminium hypophosphite kwisisombululo se-ethanol se-1% KH-550 iiyure ezi-2, uze womise kwi-80°C.
- Ulandelelwano lokuxuba:
- I-resin esisiseko + i-dispersant + i-agent yokudibanisa → Ukuxuba ngesantya esiphantsi (500 rpm, imizuzu emi-5).
- Yongeza i-ATH/aluminiyam hypophosphite eguquliweyo → I-High-speed shear (2500 rpm, imizuzu engama-20).
- Yongeza i-zinc borate/MCA/PTFE → Ukuxuba ngesantya esiphantsi (800 rpm, imizuzu eli-10).
- Izixhobo: I-extruder enezikrufu ezimbini (iindawo zobushushu: indawo yokutya engama-200°C, indawo yokunyibilika engama-230°C, i-die 220°C).
- Ulawulo lobushushu obusebenzayo
- Qinisekisa ukuba ubushushu bokunyibilika bungaphantsi kwama-250°C ukuze uthintele ukubola kwe-MCA (i-MCA iyabola kuma-250–300°C).
- Iipellets ezipholisa amanzi emva kokukhupha ukuthintela ukufuduka kwezinto ezithintela ilangatye.
IV. Indlela yokusebenzisana ethintela ilangatye
- I-ATH + i-Aluminium Hypophosphite
- I-ATH ifunxa ubushushu kwaye ikhuphe umphunga wamanzi, inyibilikise iigesi ezivuthayo.
- I-aluminium hypophosphite ikhuthaza ukwakheka kwe-dense char (AlPO₄), ithintela ukudluliselwa kobushushu.
- I-Zinc Borate + MCA
- I-Zinc borate yenza umqobo onjengeglasi phezu kwemifantu yetshani.
- I-MCA iyabola ukuze ikhuphe i-NH₃, inyibilikise ioksijini kwaye ithintele ii-free radical reactions.
- I-PTFE Anti-Dripping
- I-PTFE micropowder yenza inethiwekhi ye-fibrous, inciphisa umngcipheko wokutsha kwe-melt-drip.
V. Ukulungiswa koMsebenzi kunye nokusombulula iingxaki
| Ingxaki Eqhelekileyo | Isisombululo |
|---|---|
| Ukuthintela ilangatye ngaphantsi kwe-V0 (V1/V2) | Yongeza i-aluminium hypophosphite ukuya kwi-12% + MCA ukuya kwi-5%, okanye yongeza i-2% ye-phosphorus ebomvu efakwe ngaphakathi (ehambelanayo ne-aluminium hypophosphite). |
| Iipropati zoomatshini ezinciphileyo | Yehlisa i-ATH iye kwi-25%, yongeza i-5% yefayibha yeglasi (ukuqinisa) okanye i-3% ye-maleic anhydride-grafted POE (ukuqinisa). |
| Ukungaguquguquki kakuhle kokucubungula | Yongeza i-dispersant ukuya kwi-3%, okanye yongeza i-0.5% ye-low-MW polyethylene wax (ukuthambisa). |
| Ukudubula komphezulu | Lungiselela umthamo we-coupling agent okanye utshintshele kwi-titanate coupling agent (NDZ-201) ukuze ufumane i-interfacial bonding engcono. |
VI. IiMetriki zoQinisekiso
- Uvavanyo lwe-UL94 V0:
- Iisampulu ze-1.6 mm kunye ne-3.2 mm, ixesha elipheleleyo lokutsha < imizuzwana engama-50 emva kokutsha kabini, akukho kutsha okuvuzayo.
- I-LOI: Ithagethi ≥30% (yokwenyani ≥28%).
- Iipropati zoomatshini:
- Amandla okutsalwa > 40 MPa, amandla okutshaya > 5 kJ/m² (umgangatho we-ASTM).
- Uzinzo lobushushu (TGA):
- Intsalela yeChar kwi-800°C > 20%, ubushushu bokuqala bokubola > 300°C.
VII. Umzekelo weNgxelo yoBuchule
| Icandelo | Umxholo (%) |
|---|---|
| I-SK Polyester ES500 | 48% |
| I-Ultrafine ATH (itshintshiwe) | 28% |
| I-Aluminium Hypophosphite | 11% |
| I-Zinc Borate | 7% |
| I-MCA | 4% |
| I-BYK-161 Dispersant | 2.5% |
| Iarhente yoQhagamshelo lweKH-550 | 1% |
| Iarhente yokuthintela ukuvuza ye-PTFE | 0.8% |
| I-Zinc Stearate | 0.5% |
Olu lwakhiwo kunye noyilo lwenkqubo lufezekisa ngempumelelo i-UL94 V0 flame retardancy ye-SK Polyester ES500 ngelixa ilinganisa i-processability kunye neempawu zoomatshini. Kucetyiswa uvavanyo oluncinci ukuqinisekisa ukusasazeka ngaphambi kokulinganisa kakuhle (umz., ukulinganisela i-aluminium hypophosphite kunye ne-MCA). Ukuze kuphuculwe ngakumbi i-flame retardancy, cinga ngokongeza i-2% boron nitride nanosheets (BNNS) njenge-full-functional thermal conductive/flame retardant filler.
More info., pls contact lucy@taifeng-fr.com
Ixesha leposi: Julayi-01-2025
