Qaacido loogu talagalay SK Polyester ES500 (qiimeynta UL94 V0).
I. Habka Naqshadeynta Qaabaynta
- Iswaafajinta Substrate-ka
- SK Polyester ES500: Polyester thermoplastic ah oo leh heerkul caadi ah oo ah 220–260°C. Qalabka dab-damiska waa inuu u adkaystaa heerkulkan.
- Shuruudaha Muhiimka ah: Isku dheelitirka dib-u-celinta ololka (V0), sifooyinka farsamada (xoogga jiidista/saamaynta), iyo dabacsanaanta farsamaynta.
- Nidaamka Ka-hortagga Ololka ee Isku-dhafan
- Ultrafine Aluminium Hydroxide (ATH): Qalabka dab-damiska dabka ee aasaasiga ah, fuuq-baxa endothermic. Raritaanka waa inuu dheellitiraa dib-u-celinta dabka iyo sifooyinka farsamada.
- Aluminium Hypophosphite: Isku-dubaridka Char-forming synergist, wuxuu la shaqeeyaa ATH si uu u abuuro saameyn isku-dhafan oo fosfooraska-aluminium ah, taasoo hagaajinaysa tayada char.
- Zinc Borate: Kobciyaha xaydha, wuxuu joojiyaa qiiqa, wuxuuna sameeyaa caqabad cufan oo leh ATH.
- MCA (Melamine Cyanurate): Dawo dab-damis ah oo gaaska ah, waxay khafiifisaa oksijiinta waxayna joojisaa daadinta dhalaalka.
II. Qaacido Lagu Taliyay (Boqolkiiba Miisaanka)
| Qaybta | Saamiga | Qoraalada Habaynta |
|---|---|---|
| SK Polyester ES500 | 45–50% | Risin saldhig ah; dooro heerka dareeraha sare si aad u magdhabto dheellitirka buuxinta. |
| ATH-ka aadka u fiican | 25–30% | Dusha sare oo wax laga beddelay iyadoo la adeegsanayo wakiilka isku xidhka silane (KH-550), D50 < 3 μm. |
| Aluminium Hypophosphite | 10–12% | Kuleylka u adkaysta (>300°C), horay loogu qasay ATH oo lagu daray marxalado. |
| Zinc Borate | 6–8% | Waxaa lagu daray MCA si looga fogaado burburka dhismaha ee sare. |
| MCA | 4–5% | Heerkulka habka < 250°C, kala firdhis xawaare hoose leh. |
| Kala-bixiyaha | 2–3% | Kala firdhiye ku habboon Polyester (tusaale ahaan, BYK-161) + isku-darka wax polyetylen. |
| Wakiilka Isku-xidhka (KH-550) | 1% | Waxay sii daweysaa ATH iyo aluminium hypophosphite; ethanol-ka ayaa ku milma ka dibna qalajinta. |
| Wakiilka Ka-hortagga Dhibicda | 0.5–1% | Microbudada PTFE si loo xakameeyo dab-shidka dhalaalka. |
| Gargaarka Habaynta | 0.5% | Zinc stearate (saliidaynta iyo ka hortagga dhegdheg). |
III. Xakamaynta Habraaca Muhiimka ah
- Hagaajinta Kala-baxa
- Daawaynta kahor: Ku qooy ATH iyo aluminium hypophosphite xalka ethanol ee 1% KH-550 muddo 2 saacadood ah, ka dibna ku qallaji heerkul ah 80°C.
- Taxanaha Isku-darka:
- Risin saldhig ah + kala firdhiye + wakiilka isku xidhka → Isku-darka xawaare hoose (500 rpm, 5 daqiiqo).
- Ku dar ATH/aluminium hypophosphite oo wax laga beddelay → Gooyn xawaare sare leh (2500 rpm, 20 daqiiqo).
- Ku dar zinc borate/MCA/PTFE → Isku-darka xawaare hoose (800 rpm, 10 daqiiqo).
- Qalabka: Qalab laba-boolal ah (aagagga heerkulka: aagga quudinta 200°C, aagga dhalaalka 230°C, 220°C).
- Xakamaynta Heerkulka Habaynta
- Hubi heerkulka dhalaalka < 250°C si looga hortago burburka MCA (MCA waxay ku burburtaa 250–300°C).
- Kiniiniyada biyaha qaboojiya ka dib marka la saaro si looga hortago socdaalka dab-damiska.
IV. Habka Isku-dhafka ah ee Ka-hortagga Dabka
- ATH + Aluminium Hypophosphite
- ATH waxay nuugtaa kulaylka waxayna sii deysaa uumiga biyaha, iyadoo qaseysa gaasaska ololaya.
- Aluminium hypophosphite wuxuu kiciyaa sameynta char cufan (AlPO₄), isagoo xannibaya wareejinta kulaylka.
- Zinc Borate + MCA
- Zinc borate wuxuu sameeyaa difaac galaas ah oo ka sarreeya dildilaaca.
- MCA waxay u kala baxdaa si ay u sii deyso NH₃, iyadoo badineysa oksijiinta iyo joojinta falcelinta xagjirka xorta ah.
- Ka-hortagga PTFE ee Dhibicda
- Budada yar yar ee PTFE waxay samaysaa shabakad fiilooyin leh, taasoo yaraynaysa khatarta dab-damiska dhalaalka-dhibcaha.
V. Hagaajinta iyo Xal u helidda Dhibaatooyinka Waxqabadka
| Arrin Caadi ah | Xalka |
|---|---|
| Dib u dhaca ololka oo ka hooseeya V0 (V1/V2) | Kordhi aluminiinka hypophosphite ilaa 12% + MCA ilaa 5%, ama ku dar 2% fosfooraska cas ee la daboolay (oo la mid ah aluminiinka hypophosphite). |
| Sifooyinka farsamada oo la dhimay | Yaree ATH ilaa 25%, ku dar 5% fiber galaas ah (xoojin) ama 3% POE-ga maleic anhydride-grafted (adkeyn). |
| Dabacsanaan yar oo habayn ah | Ku dar kala firdhiyaha ilaa 3%, ama ku dar 0.5% wax polyethylene ah oo MW yar (saliidayn). |
| Ubaxyada dusha sare | Hagaaji qiyaasta wakiilka isku xidhka ama u beddel wakiilka isku xidhka titanate (NDZ-201) si aad u hesho isku xidhnaan wanaagsan oo wejiga ah. |
VI. Halbeegyada Xaqiijinta
- Tijaabada UL94 V0:
- Muunadaha 1.6 mm iyo 3.2 mm, wadarta waqtiga gubashada < 50 ilbiriqsi ka dib laba dab-shid, ma jiraan dab-shid daadanaya.
- LOI: Bartilmaameed ≥30% (dhab ahaantii ≥28%).
- Sifooyinka Farsamada:
- Xoogga jiidista > 40 MPa, xoogga saamaynta > 5 kJ/m² (Heerka ASTM).
- Xasiloonida Kulaylka (TGA):
- Hadhaaga Char-ka ah heerkul ah 800°C > 20%, heerkulka kala-baxa bilowga ah > 300°C.
VII. Tusaalaha Qaacidada Tixraaca
| Qaybta | Tusmada (%) |
|---|---|
| SK Polyester ES500 | 48% |
| Ultrafine ATH (wax laga beddelay) | 28% |
| Aluminium Hypophosphite | 11% |
| Zinc Borate | 7% |
| MCA | 4% |
| BYK-161 Dispersant | 2.5% |
| Wakiilka Isku-xidhka KH-550 | 1% |
| Wakiilka Ka-hortagga Dhibicda PTFE | 0.8% |
| Sink Stearate | 0.5% |
Qaab-dhismeedkan iyo naqshadeynta habkan ayaa si wax ku ool ah u gaarsiiya dib-u-celinta ololka UL94 V0 ee SK Polyester ES500 iyadoo la isku dheelitirayo hab-socodka iyo sifooyinka farsamada. Tijaabooyin yar yar ayaa lagu talinayaa in la xaqiijiyo kala firdhinta ka hor inta aan la hagaajin saamiga hagaajinta (tusaale ahaan, dheellitirka aluminium hypophosphite iyo MCA). Si aad u hesho kor u qaadida dib-u-celinta ololka, tixgeli inaad ku darto 2% boron nitride nanosheets (BNNS) oo ah buuxinta kuleyliyaha laba-shaqo leh/dareeraha dabka.
More info., pls contact lucy@taifeng-fr.com
Waqtiga boostada: Luulyo-01-2025
