Ƙirƙirar mai ɗaukar harshen wuta don SK Polyester ES500 (ƙimar UL94 V0).
I. Tsarin Tsara Tsara
- Daidaituwar Substrate
- SK Polyester ES500: Polyester thermoplastic tare da yanayin aiki na yau da kullun na 220-260°C. Dole ne mai riƙe harshen wuta ya yi tsayayya da wannan kewayon zafin jiki.
- Maɓallin Bukatun: Ma'auni na jinkirin harshen wuta (V0), kaddarorin inji (ƙarfin ƙarfi/tasiri), da sarrafa ruwa.
- Tsarin Tsare-tsare Harshen Harshe
- Ultrafine Aluminum Hydroxide (ATH): Farkon harshen wuta, rashin ruwa na endothermic. Load dole ne ya daidaita jinkirin harshen wuta da kaddarorin inji.
- Aluminum Hypophosphite: Char-forming synergist, yana aiki tare da ATH don ƙirƙirar tasirin haɗin gwiwa na phosphorus-aluminum, inganta ingancin char.
- Zinc Borate: Mai haɓaka char, yana hana hayaki, kuma yana samar da shinge mai yawa tare da ATH.
- MCA (Melamine Cyanurate): Gas-lokacin harshen wuta retardant, dilutes oxygen da kuma hana narke digo.
II. Shawarwari Na Musamman (Kashi Nauyi)
| Bangaren | Rabo | Bayanan Gudanarwa |
|---|---|---|
| SK Polyester ES500 | 45-50% | Gudun tushe; zaɓi babban ruwa mai ƙarfi don rama dankowar filler. |
| Farashin ATH | 25-30% | Gyaran fuska tare da wakilin haɗin silane (KH-550), D50 <3 μm. |
| Aluminum Hypophosphite | 10-12% | Mai jure zafi (> 300 ° C), an haɗa shi da ATH kuma an ƙara shi cikin matakai. |
| Zinc Borate | 6-8% | Ƙarawa tare da MCA don guje wa lalacewa mai ƙarfi mai ƙarfi. |
| MCA | 4-5% | Tsarin zafin jiki <250°C, ƙananan saurin watsawa. |
| Watsewa | 2-3% | Polyester-jituwa dispersant (misali, BYK-161) + polyethylene kakin zuma hada. |
| Wakilin Haɗi (KH-550) | 1% | Pre-maganin ATH da aluminum hypophosphite; Nitsewar ethanol ya biyo bayan bushewa. |
| Wakilin Anti-Dripping | 0.5-1% | PTFE micropowder don kashe wutan narkewa. |
| Taimakon sarrafawa | 0.5% | Zinc stearate (lubricating da anti-stick). |
III. Maɓalli Tsarin Gudanarwa
- Inganta Watsawa
- Pre-jiyya: Jiƙa ATH da aluminum hypophosphite a cikin 1% KH-550 ethanol bayani na 2 hours, sa'an nan bushe a 80 ° C.
- Jerin hadawa:
- Base guduro + dispersant + hadawa wakili → Low-gudun hadawa (500 rpm, 5 min).
- Ƙara gyare-gyaren ATH / aluminum hypophosphite → Ƙarƙashin sauri (2500 rpm, 20 min).
- Ƙara zinc borate/MCA/PTFE → Haɗin ƙananan sauri (800 rpm, 10 min).
- Kayan aiki: Twin-screw extruder (yankin zafin jiki: yankin ciyarwa 200°C, yankin narkewa 230°C, mutu 220°C).
- Gudanar da Zazzabi
- Tabbatar da zafin narke <250°C don hana lalatawar MCA (MCA tana ruɓe a 250-300°C).
- Pellets masu sanyin ruwa bayan extrusion don hana ƙaura mai hana wuta.
IV. Ƙunƙashin Ƙarƙashin Ƙarƙashin Ƙarƙashin Ƙarƙwara
- ATH + Aluminum Hypophosphite
- ATH yana ɗaukar zafi kuma yana fitar da tururin ruwa, yana diluting gas mai ƙonewa.
- Aluminum hypophosphite yana haifar da ƙima mai yawa (AlPO₄), yana toshe canjin zafi.
- Zinc Borate + MCA
- Zinc borate yana samar da shingen gilashi akan fashewar char.
- MCA yana rubewa don sakin NH₃, yana diluting oxygen kuma yana hana halayen radicals kyauta.
- PTFE Anti-Dripping
- PTFE micropowder yana samar da hanyar sadarwa ta fibrous, yana rage haɗarin ƙonewa-drip.
V. Daidaita Ayyuka & Shirya matsala
| Batun gama gari | Magani |
|---|---|
| Dagewar harshen wuta a ƙasan V0 (V1/V2) | Haɓaka hypophosphite aluminium zuwa 12% + MCA zuwa 5%, ko ƙara 2% ja fosfour da aka rufe (haɗin gwiwa tare da aluminium hypophosphite). |
| Rage kayan aikin injiniya | Rage ATH zuwa 25%, ƙara 5% gilashin fiber (ƙarfafawa) ko 3% maleic anhydride-grafted POE (toughening). |
| Rashin aikin ruwa mara kyau | Ƙara tarwatsawa zuwa 3%, ko ƙara 0.5% low-MW polyethylene wax (mai mai). |
| Surface blooms | Haɓaka adadin adadin wakili ko canza zuwa wakilin titanate coupling agent (NDZ-201) don ingantacciyar haɗin haɗin fuska. |
VI. Ma'aunin Tabbatarwa
- Gwajin UL94 V0:
- 1.6 mm da 3.2 mm samfurori, jimlar lokacin ƙonewa <50 sec bayan kunnawa biyu, babu ƙonewa.
- LOI: Manufar ≥30% (ainihin ≥28%).
- Kayayyakin Injini:
- Ƙarfin ƙarfi> 40 MPa, ƙarfin tasiri> 5 kJ/m² (ASTM misali).
- Ƙarfin Ƙarfi (TGA):
- Ragowar Char a 800°C> 20%, zafin bazuwar farko> 300°C.
VII. Misalin Tsarin Magana
| Bangaren | Abun ciki (%) |
|---|---|
| SK Polyester ES500 | 48% |
| Ultrafine ATH (gyara) | 28% |
| Aluminum Hypophosphite | 11% |
| Zinc Borate | 7% |
| MCA | 4% |
| BYK-161 Mai Rarraba | 2.5% |
| Wakilin Haɗaɗɗen KH-550 | 1% |
| PTFE Anti-Dripping Agent | 0.8% |
| Zinc Stearate | 0.5% |
Wannan tsari da ƙirar tsari da kyau sun cimma nasarar jinkirin harshen wuta na UL94 V0 don SK Polyester ES500 yayin daidaita iya aiki da kaddarorin inji. Ana ba da shawarar ƙananan gwaje-gwaje don tabbatar da tarwatsawa kafin daidaitawa mai kyau (misali, daidaita al'amurra hypophosphite da MCA). Don ƙarin haɓaka jinkirin harshen wuta, yi la'akari da ƙara 2% boron nitride nanosheets (BNNS) azaman mai aikin zafi mai ɗaukar zafi/harshen wuta.
More info., pls contact lucy@taifeng-fr.com
Lokacin aikawa: Jul-01-2025
