Ukwakheka Okubhekisela Kokubambelela Komlilo Kwe-Thermosetting Acrylic Adhesive
Ukuze kuhlangatshezwane nezidingo ze-UL94 V0 ezivimbela ilangabi zama-adhesive e-thermosetting, uma kucatshangelwa izici zama-flame retardants akhona kanye nokucaciswa kwezinhlelo ze-thermosetting, kuphakanyiswa ukwakheka okulandelayo okulungiselelwe kanye nokuhlaziywa okubalulekile:
I. Izimiso Zokuklama Ukwakheka kanye Nezidingo Zesistimu Yokusetha I-Thermosetting
- Kumelwe kufane nokushisa kokushisa (ngokuvamile 120–180°C)
- Izinto ezivimbela ilangabi kumele zikwazi ukumelana nokucubungula okushisa okuphezulu (gwema ukwehluleka kokubola)
- Qinisekisa ukuqina kokusabalala ezinhlelweni eziphakeme zokuxhumanisa
- Linganisa amandla omshini ngemva kokwelashwa kanye nokusebenza kahle kokulinda ilangabi
II. Umklamo Wesistimu Ehambisanayo Evimbela Amalangabi
Imisebenzi Evimbela Umlilo Nokuhambisana Kwe-Thermoset
| Isivimbeli Somlilo | Indima Eyinhloko | Ukuhambisana kwe-Thermoset | Ukulayisha Okunconyiwe |
|---|---|---|---|
| I-ATH enhle kakhulu | I-FR Eyinhloko: Ukuphelelwa amanzi emzimbeni kwe-Endothermic, ukuncibilikiswa kwesigaba segesi | Kudinga ukuguqulwa kobuso (ukulwa nokuhlangana) | ≤35% (ukulayisha ngokweqile kunciphisa ukuxhumanisa) |
| I-hypophosphite ye-aluminium | I-Synergist: I-Char catalyst, i-radical scavenger (PO·) | Ukunciphisa izinga lokushisa >300°C, kufanelekile ukupholisa | 8–12% |
| I-borate ye-zinc | Isithuthukisi se-Char: Sakha isithiyo esinjengengilazi, sinciphisa intuthu | Isebenzisana ne-ATH (Al-BO char) | 5–8% |
| I-MCA (i-Melamine cyanurate) | I-Ges-phase FR: Ikhipha i-NH₃, ivimbela ukusha | Hlukanisa izinga lokushisa 250–300°C (izinga lokushisa elipholile <250°C) | 3–5% |
III. Ukwakheka Okunconywayo (Isisindo %)
Iziqondiso Zokucubungula Izingxenye
| Ingxenye | Isilinganiso | Amanothi Okucubungula Okuyinhloko |
|---|---|---|
| I-resin ye-acrylic ye-thermoset | 45–50% | Uhlobo olune-viscosity ephansi (isb., i-epoxy acrylate) yokulayisha okuphezulu kokugcwalisa |
| I-ATH eguquliwe ebusweni (D50 <5µm) | 25–30% | Kuphathwe kusengaphambili nge-KH-550 silane |
| I-hypophosphite ye-aluminium | 10–12% | Kuhlanganiswe ne-ATH kusengaphambili, kufakwe ngamaqoqo |
| I-borate ye-zinc | 6–8% | Kungezwe ne-MCA; gwema ukuwohloka okunoboya obukhulu |
| I-MCA | 4–5% | Ukuxuba ngesivinini esiphansi kwesigaba sekwephuzile (<250°C) |
| I-Disperant (BYK-2152 + PE wax) | 1.5–2% | Iqinisekisa ukusabalala okufanayo kokugcwalisa |
| I-ejenti yokuxhumanisa (KH-550) | 1% | Kulashwe kusengaphambili nge-ATH/hypophosphite |
| I-ejenti yokwelapha (i-BPO) | 1–2% | Isiqalisi sezinga lokushisa eliphansi sokupholisa ngokushesha |
| I-ejenti yokulwa nokuqeda (i-Aerosil R202) | 0.5% | Ukuvimbela ukuthuthwa kwendle kwe-Thixotropic |
IV. Ukulawulwa Kwenqubo Ebucayi
1. Inqubo Yokuhlakazeka
- Ngaphambi kokwelashwa: I-ATH kanye ne-hypophosphite kucwiliswe kusisombululo se-5% KH-550/ethanol (amahora ama-2, ukomisa okungu-80°C)
- Ukulandelana kokuxuba:
- I-Resin + i-dispersant → Ukuxuba ngesivinini esiphansi → Engeza i-ATH/hypophosphite eguquliwe → Ukusabalala ngesivinini esiphezulu (2500 rpm, imizuzu engama-20) → Engeza i-zinc borate/MCA → Ukuxuba ngesivinini esiphansi (gwema ukuwohloka kwe-MCA)
- Imishini: I-Planetary mixer (i-vacuum degassing) noma i-three-roll mill (yezimpushana ezicolekile kakhulu)
2. Ukuthuthukisa Ukwelapha
- Ukulungisa ngesinyathelo: 80°C/1h (ngaphambi kwejeli) → 140°C/2h (ngemuva kokwelashwa, gwema ukubola kwe-MCA)
- Ukulawula ingcindezi: 0.5–1 MPa ukuvimbela ukuqina kwe-filler
3. Izindlela Zokusebenzisana
- I-ATH + Hypophosphite: Yakha i-AlPO₄-reinforced char ngenkathi isusa ama-radical (PO·)
- I-Zinc borate + i-MCA: Isithiyo esikabili esiqinile segesi (i-NH₃ dilution + ungqimba olubunjiwe olufana nengilazi)
V. Amasu Okulungisa Ukusebenza
Izinkinga Ezivamile Nezixazululo
| Inkinga | Imbangela | Isixazululo |
|---|---|---|
| Ukuthungela okuconsayo | Ukuncibilika okuphansi | Khulisa i-MCA ibe ngu-5% + i-hypophosphite ibe ngu-12%, noma engeza u-0.5% we-PTFE micropowder |
| Ukuphuka ngemva kokwelashwa | Ukulayisha kwe-ATH okweqile | Yehlisa i-ATH ibe ngu-25% + 5% nano-CaCO₃ (ukuqinisa) |
| Ukugcinwa kwenhlabathi | I-thixotropy embi | Khulisa i-silica ibe ngu-0.8% noma ushintshele ku-BYK-410 |
| I-LOI <28% | I-FR enganele yesigaba segesi | Engeza i-phosphorus ebomvu embozwe ngo-2% noma i-nano-BN engu-1% |
VI. Amamethrikhi Okuqinisekisa
- I-UL94 V0: Amasampula angu-3.2 mm, isikhathi somlilo esiphelele <50 s (akukho ukusha kwekotini)
- I-LOI ≥30% (umkhawulo wokuphepha)
- Izinsalela ze-TGA >25% (800°C, N₂)
- Ibhalansi yemishini: Amandla okunamathela >8 MPa, amandla okucheba >6 MPa
Izinto Ezibalulekile Okufanele Uzicabangele
- Ifinyelela isilinganiso se-V0 ngenkathi igcina ubuqotho bomshini.
- Kunconywa ukuhlolwa ngezinga elincane (50g) ngaphambi kokukala.
- Ukuze kusebenze kahle kakhulu: 2–3% we-DOPO derivatives (isb., i-phosphaphenanthrene) ingangezwa.
Lokhu kwakhiwa kuqinisekisa ukuhambisana nezindinganiso eziqinile ezivimbela umlilo ngenkathi kuthuthukiswa ukucutshungulwa kanye nokusebenza kokusetshenziswa kokugcina.
Isikhathi sokuthunyelwe: Julayi-01-2025
