Ukwakhiwa kwereferensi ye-flame retardant ye-SK Polyester ES500 (isilinganiso se-UL94 V0).
I. Indlela Yokuklama Ukwakhiwa
- Ukuhambisana kwe-substrate
- I-SK Polyester ES500: I-polyester ye-thermoplastic enezinga lokushisa elijwayelekile lokucubungula elingu-220–260°C. I-flame retardant kumele imelane nalesi sigaba sezinga lokushisa.
- Izidingo Eziyinhloko: Ibhalansi ukubambezeleka kwelangabi (V0), izici zokushintshwa (amandla okushuba/okuthinta), kanye nokucubungula uketshezi.
- Synergistic Flame Retardant System
- I-Ultrafine Aluminium Hydroxide (ATH): I-primary flame retardant, endothermic dehydration. Ukulayisha kufanele kulinganisele ukubambezeleka komlilo kanye nezakhiwo zemishini.
- I-Aluminium Hypophosphite: I-synergist eyenza i-Char-forming, isebenza ne-ATH ukuze idale umphumela we-phosphorus-aluminium synergistic, ukuthuthukisa ikhwalithi ye-char.
- I-Zinc Borate: Isithuthukisi se-char, sicindezela intuthu, futhi sakha umgoqo ominyene nge-ATH.
- I-MCA (i-Melamine Cyanurate): I-Gas-phase flame retardant, inciphisa umoya-mpilo futhi ivimbele ukuncibilika ukuconsa.
II. Ukwakhiwa Okunconyiwe (Iphesenti Lesisindo)
| Isakhi | Isilinganiso | Icubungula Amanothi |
|---|---|---|
| I-SK Polyester ES500 | 45–50% | Isisekelo se-resin; khetha ibanga elinoketshezi oluningi ukuze unxephezele i-viscosity yokugcwalisa. |
| Inani eliphakeme kakhulu lama-ATH | 25–30% | Ubuso obulungiswe nge-ejenti yokuhlanganisa i-silane (KH-550), i-D50 <3 μm. |
| I-Aluminium Hypophosphite | 10–12% | Ikwazi ukumelana nokushisa (>300°C), ixutshwe ngaphambili ne-ATH futhi yengezwa ngezigaba. |
| I-Zinc Borate | 6–8% | Kwengezwe ne-MCA ukuze kugwenywe ukulimala kwesakhiwo se-shear ephezulu. |
| I-MCA | 4–5% | Izinga lokushisa lenqubo lingu-250°C, ukuhlakazeka kwesivinini esiphansi. |
| Ukuhlakazeka | 2–3% | I-polyester-compatible dispersant (isb, BYK-161) + i-polyethylene wax composite. |
| I-ejenti yokuhlanganisa (KH-550) | 1% | Ukwelashwa kwangaphambili kwe-ATH ne-aluminium hypophosphite; ukucwiliswa kwe-ethanol kulandelwa ukomiswa. |
| I-Anti-Dripping Agent | 0.5–1% | I-PTFE micropowder yokucindezela ukuthungela okuncibilikayo. |
| Usizo Lokucubungula | 0.5% | I-Zinc stearate (i-lubrication kanye ne-anti-sticking). |
III. Izilawuli Zenqubo Ebalulekile
- Ukuthuthukisa Ukusabalalisa
- Ukwelashwa kwangaphambili: Gcoba i-ATH ne-aluminium hypophosphite ku-1% KH-550 isixazululo se-ethanol amahora angu-2, bese womisa ku-80°C.
- Ukulandelana Kokuxuba:
- Isisekelo se-resin + dispersant + i-ejenti yokuhlanganisa → Ukuxutshwa kwesivinini esiphansi (500 rpm, 5 min).
- Engeza i-ATH/aluminium hypophosphite eshintshiwe → Ishear yesivinini esikhulu (2500 rpm, 20 min).
- Engeza i-zinc borate/MCA/PTFE → Ukuhlanganisa isivinini esiphansi (800 rpm, 10 min).
- Izisetshenziswa: I-Twin-screw extruder (izindawo zokushisa: indawo yokuphakelayo 200°C, indawo encibilikayo 230°C, die 220°C).
- Icubungula Ukulawulwa Kwezinga Lokushisa
- Qinisekisa ukuthi izinga lokushisa elincibilikayo lingaphansi kuka-250°C ukuze uvimbele ukubola kwe-MCA (i-MCA ibola ku-250–300°C).
- Ama-pellets apholile amanzi ngemva kokukhishwa ukuze avimbele ukufuduka kwe-flame retardant.
IV. I-Flame Retardant Synergistic Mechanism
- I-ATH + Aluminium Hypophosphite
- I-ATH imunca ukushisa futhi ikhiphe umhwamuko wamanzi, ihlambulule amagesi avuthayo.
- I-Aluminium hypophosphite igqugquzela ukwakheka kwe-char elicinene (AlPO₄), ivimbe ukudluliswa kokushisa.
- Zinc Borate + MCA
- I-Zinc borate yakha umgoqo oyingilazi phezu kwemifantu ye-char.
- I-MCA iyabola ukuze ikhulule i-NH₃, ihlanza umoya-mpilo futhi ivimbele ukusabela kwama-radical mahhala.
- I-PTFE Anti-Dripping
- I-PTFE i-micropowder yakha inethiwekhi ene-fibrous, yehlisa ubungozi bokuthungela kokuncibilika.
V. Ukushuna Ukusebenza & Ukuxazulula Izinkinga
| Inkinga Ejwayelekile | Isixazululo |
|---|---|
| Ukuncipha komlilo ngaphansi kwe-V0 (V1/V2) | Khulisa i-aluminium hypophosphite ibe ngu-12% + MCA ukuya ku-5%, noma wengeze u-2% we-phosphorus ebomvu ehlanganisiwe (i-synergistic ne-aluminium hypophosphite). |
| Izakhiwo zemishini ezincishisiwe | Yehlisa i-ATH iye ku-25%, engeza u-5% we-glass fiber (ukuqinisa) noma u-3% we-poE ehlanganiswe ne-anhydride (toughening). |
| I-fluidity yokucubungula engalungile | Khulisa i-disperant ibe ngu-3%, noma wengeze i-wax ye-polyethylene engu-0.5% ephansi ye-MW (ukugcoba). |
| Ukuqhakaza komhlaba | Lungiselela umthamo we-ejenti yokuhlanganisa noma ushintshele kumenzeli wokuhlanganisa we-titanate (NDZ-201) ukuze uthole ukuhlangana okungcono kobuso. |
VI. Amamethrikhi okuqinisekisa
- Ukuhlolwa kwe-UL94 V0:
- 1.6 mm kanye nezibonelo ezingu-3.2 mm, isikhathi sokusha esiphelele < amasekhondi angu-50 ngemva kokubasela okubili, akukho ukuthungela okuconsayo.
- I-LOI: Ithagethi ≥30% (okwangempela ≥28%).
- Izici zikaMechanical:
- Amandla okuqina > 40 MPa, amandla omthelela > 5 kJ/m² (okujwayelekile kwe-ASTM).
- Ukuzinza Kwe-Thermal (TGA):
- Izinsalela ze-Char ku-800°C> 20%, izinga lokushisa lokuqala lokubola> 300°C.
VII. Isibonelo Sereferensi Ukwakhiwa
| Isakhi | Okuqukethwe (%) |
|---|---|
| I-SK Polyester ES500 | 48% |
| I-Ultrafine ATH (ilungisiwe) | 28% |
| I-Aluminium Hypophosphite | 11% |
| I-Zinc Borate | 7% |
| I-MCA | 4% |
| I-BYK-161 Dispersant | 2.5% |
| I-KH-550 Coupling Agent | 1% |
| I-PTFE Anti-Dripping Agent | 0.8% |
| I-Zinc Stearate | 0.5% |
Lokhu kwakhiwa kanye nedizayini yenqubo kuzuzisa ngempumelelo i-UL94 V0 flame retardancy ye-SK Polyester ES500 kuyilapho kulinganisa ukucutshungulwa kanye nezakhiwo zemishini. Ukuhlolwa kwezinga elincane kuyanconywa ukuze kuqinisekiswe ukuhlakazeka ngaphambi kwezilinganiso zokushuna kahle (isb, ukulinganisa i-aluminium hypophosphite ne-MCA). Ukuze uthole okunye ukuthuthukiswa kokubambezeleka komlilo, cabanga ukwengeza u-2% we-boron nitride nanosheets (BNNS) njengesigcwalisi esisebenza kabili esisebenzayo esishisayo/esibuyisela ilangabi.
More info., pls contact lucy@taifeng-fr.com
Isikhathi sokuthumela: Jul-01-2025
