Tsarin maganin hana harshen wuta na SK Polyester ES500 (ƙimar UL94 V0).
I. Tsarin Tsarin Tsarin
- Daidaiton Substrate
- SK Polyester ES500: Polyester mai thermoplastic wanda ke da yanayin zafin aiki na yau da kullun na 220–260°C. Dole ne mai hana harshen wuta ya jure wannan yanayin zafin.
- Muhimman Bukatu: Daidaita jinkirin harshen wuta (V0), halayen injiniya (ƙarfin tauri/tasiri), da kuma sauƙin sarrafawa.
- Tsarin Hana Wuta Mai Haɗaka
- Ultrafine Aluminum Hydroxide (ATH): Babban maganin hana harshen wuta, bushewar jiki a cikin endothermic. Dole ne a daidaita ɗaukar nauyi da kuma halayen injina.
- Aluminum Hypophosphite: Mai haɗa sinadarai masu kama da Char-forming, yana aiki tare da ATH don ƙirƙirar tasirin haɗin phosphorus-aluminum, yana inganta ingancin char.
- Zinc Borate: Yana ƙara yawan hayaki, yana hana hayaki, kuma yana samar da shinge mai yawa tare da ATH.
- MCA (Melamine Cyanurate): Mai hana harshen wuta a lokacin iskar gas, yana rage iskar oxygen kuma yana hana narkewar ruwa.
II. Tsarin da aka ba da shawarar (Kashi Nauyi)
| Bangaren | Rabon | Bayanan Sarrafawa |
|---|---|---|
| SK Polyester ES500 | Kashi 45–50% | Resin tushe; zaɓi matakin ruwa mai yawa don rama danko na cikawa. |
| Ultrafine ATH | 25–30% | An gyara saman da aka yi amfani da wakilin haɗin silane (KH-550), D50 < 3 μm. |
| Aluminum Hypophosphite | Kashi 10–12% | Mai jure zafi (>300°C), an riga an haɗa shi da ATH kuma an ƙara shi a matakai. |
| Zinc Borate | 6–8% | An ƙara shi da MCA don guje wa lalacewar tsarin da ke da ƙarfi. |
| MCA | 4–5% | Zafin aiki < 250°C, watsawa mai ƙarancin gudu. |
| Mai watsawa | 2–3% | Na'urar watsawa mai jituwa da Polyester (misali, BYK-161) + haɗin kakin polyethylene. |
| Wakilin Haɗawa (KH-550) | 1% | Yana yin maganin ATH da aluminum hypophosphite kafin lokaci; nutsewar ethanol sannan ya bushe. |
| Maganin hana digo | 0.5–1% | Micropowder na PTFE don rage ƙonewar narkewa. |
| Taimakon Sarrafawa | 0.5% | zinc stearate (mai shafawa da hana mannewa). |
III. Mahimman Sarrafa Tsarin Aiki
- Inganta Watsawa
- Kafin a fara magani: A jiƙa ATH da aluminum hypophosphite a cikin maganin ethanol na 1% KH-550 na tsawon awanni 2, sannan a bushe a zafin 80°C.
- Jerin Haɗawa:
- Resin tushe + mai watsawa + wakilin haɗawa → Haɗawa mai ƙarancin gudu (500 rpm, minti 5).
- Ƙara ATH/aluminum hypophosphite da aka gyara → Babban yankewa mai sauri (2500 rpm, minti 20).
- Sai a zuba sinadarin zinc borate/MCA/PTFE → Haɗawa mai ƙarancin gudu (800 rpm, minti 10).
- Kayan aiki: Injin fitar da sukurori biyu (yankunan zafin jiki: yankin ciyarwa 200°C, yankin narkewa 230°C, mutu 220°C).
- Sarrafa Zafin Jiki da Sarrafawa
- Tabbatar da zafin narkewa ƙasa da 250°C don hana ruɓewar MCA (MCA tana ruɓewa a 250–300°C).
- Kwalaye masu sanyaya ruwa bayan an fitar da su don hana ƙaura daga masu hana wuta.
IV. Tsarin Hadin Gwiwa Mai Rage Wuta Mai Hana Wuta
- ATH + Aluminum Hypophosphite
- ATH yana shan zafi kuma yana fitar da tururin ruwa, yana narkar da iskar gas mai ƙonewa.
- Aluminum hypophosphite yana ƙarfafa samuwar char mai yawa (AlPO₄), yana toshe canja wurin zafi.
- Zinc Borate + MCA
- Sinadarin zinc borate yana samar da shinge mai kama da gilashi a kan fasawar char.
- MCA yana rugujewa don sakin NH₃, yana rage iskar oxygen da kuma hana halayen free radicals.
- PTFE Anti-Digar
- Micropowder na PTFE yana samar da hanyar sadarwa ta fibrous, yana rage haɗarin ƙonewa da narkewa.
V. Gyaran Aiki da Shirya Matsaloli
| Matsalar gama gari | Mafita |
|---|---|
| Rashin ƙarfin harshen wuta a ƙasa da V0 (V1/V2) | Ƙara sinadarin aluminum hypophosphite zuwa 12% + MCA zuwa 5%, ko kuma ƙara 2% jan phosphorus da aka lulluɓe (wanda ke aiki tare da sinadarin aluminum hypophosphite). |
| Rage halayen injina | Rage ATH zuwa 25%, ƙara 5% na zare na gilashi (ƙarfafawa) ko 3% na POE na maleic anhydride (ƙarfafawa). |
| Rashin isasshen sassaucin sarrafawa | Ƙara mai watsawa zuwa 3%, ko kuma ƙara kakin polyethylene mai ƙarancin MW 0.5% (mai shafawa). |
| Fuskar fure tana fure | Inganta yawan maganin haɗin gwiwa ko canza zuwa maganin haɗin gwiwa na titanate (NDZ-201) don ingantaccen haɗin gwiwa na fuska. |
VI. Ma'aunin Tabbatarwa
- Gwajin UL94 V0:
- Samfuran 1.6 mm da 3.2 mm, jimillar lokacin ƙonewa < daƙiƙa 50 bayan kunna wuta sau biyu, babu ɗigon wuta.
- LOI: Manufa ≥30% (ainihin ≥28%).
- Kayayyakin Inji:
- Ƙarfin tauri > 40 MPa, ƙarfin tasiri > 5 kJ/m² (ƙa'idar ASTM).
- Kwanciyar Hankali ta Zafi (TGA):
- Ragowar Char a 800°C > 20%, zafin farko na ruɓewa > 300°C.
VII. Tsarin Misali na Nazari
| Bangaren | Abun ciki (%) |
|---|---|
| SK Polyester ES500 | kashi 48% |
| Ultrafine ATH (an gyara) | kashi 28% |
| Aluminum Hypophosphite | 11% |
| Zinc Borate | 7% |
| MCA | 4% |
| Na'urar Rarraba BYK-161 | 2.5% |
| Wakilin Haɗin Kai na KH-550 | 1% |
| Wakilin hana zubar da PTFE | 0.8% |
| Sinadarin Zinc | 0.5% |
Wannan tsari da ƙirar tsari sun cimma nasarar rage harshen wuta ta UL94 V0 ga SK Polyester ES500 ta hanyar da ta dace yayin da suke daidaita iya aiki da halayen injiniya. Ana ba da shawarar ƙananan gwaje-gwaje don tabbatar da warwatsewa kafin daidaita rabon gyara (misali, daidaita aluminum hypophosphite da MCA). Don ƙarin haɓaka hana harshen wuta, yi la'akari da ƙara 2% boron nitride nanosheets (BNNS) azaman cika mai aiki biyu na thermal conductive/harbin harshen wuta.
More info., pls contact lucy@taifeng-fr.com
Lokacin Saƙo: Yuli-01-2025
