Kapangidwe kowonjezera kowonjezera moto kwa SK Polyester ES500 (mlingo wa UL94 V0).
I. Njira Yopangira Mapangidwe
- Kugwirizana kwa gawo lapansi
- SK Polyester ES500: Polyester ya thermoplastic yokhala ndi kutentha kwapakati pa 220–260°C. Choletsa moto chikuyenera kupirira kutentha uku.
- Zofunikira Zofunikira: Kuchepetsa kuchepa kwamoto (V0), makina amakina (mphamvu yamakina / mphamvu), komanso kukonza madzi.
- Synergistic Flame Retardant System
- Ultrafine Aluminiyamu Hydroxide (ATH): Choyimitsa moto choyambirira, kuchepa kwa madzi m'thupi. Kutsegula kuyenera kulinganiza kuchedwa kwa moto ndi mawotchi.
- Aluminiyamu Hypophosphite: Char-forming synergist, amagwira ntchito ndi ATH kuti apange phosphorous-aluminium synergistic effect, kupititsa patsogolo khalidwe la char.
- Zinc Borate: Chowonjezera cha Char, imachepetsa utsi, ndikupanga chotchinga cholimba ndi ATH.
- MCA (Melamine Cyanurate): Gas-phase retardant flame retardant, dilutes oxygen and inhibites kusungunuka kudontha.
II. Kupanga Kovomerezeka (Kulemera Paperesenti)
| Chigawo | Chiŵerengero | Kukonza Mfundo |
|---|---|---|
| SK Polyester ES500 | 45-50% | Base utomoni; kusankha mkulu-fluidity kalasi kubwezera kukhuthala kwa filler. |
| Mtengo wapatali wa magawo ATH | 25-30% | Pamwamba-wosinthidwa ndi silane coupling agent (KH-550), D50 <3 μm. |
| Aluminium Hypophosphite | 10-12% | Imasamva kutentha (> 300 ° C), yosakanikirana ndi ATH ndikuwonjezedwa pang'onopang'ono. |
| Zinc Borate | 6-8% | Yowonjezedwa ndi MCA kuti mupewe kuwonongeka kwamapangidwe apamwamba. |
| MCA | 4-5% | Njira kutentha <250 ° C, otsika-liwiro kubalalitsidwa. |
| Wobalalitsa | 2-3% | Dispersant yogwirizana ndi poliyesitala (mwachitsanzo, BYK-161) + gulu la sera la polyethylene. |
| Coupling Agent (KH-550) | 1% | Pre-amachitira ATH ndi aluminium hypophosphite; Kumizidwa kwa ethanol kenako ndikuumitsa. |
| Anti-Dripping Agent | 0.5-1% | PTFE micropowder kupondereza kuyatsa kusungunuka. |
| Processing Aid | 0.5% | Zinc stearate (mafuta ndi anti-kumata). |
III. Key Process Controls
- Kukhathamiritsa kwa Dispersion
- Kuchiza: Zilowerereni ATH ndi aluminium hypophosphite mu 1% KH-550 ethanol solution kwa maola 2, kenako ziume pa 80°C.
- Kusakaniza Kutsata:
- Base resin + dispersant + coupling agent → Kusakaniza kothamanga kwambiri (500 rpm, 5 min).
- Onjezani zosinthidwa za ATH/aluminium hypophosphite → Kumeta ubweya wothamanga kwambiri (2500 rpm, 20 min).
- Onjezani zinki borate/MCA/PTFE → Kusakaniza kothamanga kwambiri (800 rpm, 10 min).
- Zida: Twin-screw extruder (zigawo zotentha: zone 200 ° C, zone yosungunuka 230 ° C, kufa 220 ° C).
- Processing Kutentha Control
- Onetsetsani kuti kutentha kusungunuka kupitirira 250 ° C kuti muteteze kuwonongeka kwa MCA (MCA imawola pa 250-300 ° C).
- Madzi ozizira pellets pambuyo extrusion kupewa moto retardant kusamuka.
IV. Flame Retardant Synergistic Mechanism
- ATH + Aluminium Hypophosphite
- ATH imayamwa kutentha ndikutulutsa mpweya wamadzi, kusungunula mpweya woyaka.
- Aluminium hypophosphite imathandizira kupanga char (AlPO₄), kutsekereza kusamutsa kutentha.
- Zinc Borate + MCA
- Zinc borate amapanga chotchinga chagalasi pa ming'alu yamoto.
- MCA imawola kuti itulutse NH₃, kukhetsa mpweya komanso kuletsa ma free radical reaction.
- PTFE Anti-Dripping
- PTFE micropowder imapanga network ya fibrous, kuchepetsa chiwopsezo choyatsira kusungunuka.
V. Kusintha kwa Magwiridwe & Kuthetsa Mavuto
| Wamba Nkhani | Yankho |
|---|---|
| Kuchedwa kwamoto pansi pa V0 (V1/V2) | Wonjezerani aluminium hypophosphite mpaka 12% + MCA mpaka 5%, kapena onjezerani 2% ya phosphorous yofiira (synergistic ndi aluminium hypophosphite). |
| Kuchepetsa makina katundu | Chepetsani ATH mpaka 25%, onjezani 5% magalasi CHIKWANGWANI (kulimbitsa) kapena 3% maleic anhydride-grafted POE (toughening). |
| Osauka processing fluidity | Wonjezerani dispersant kufika 3%, kapena kuwonjezera 0.5% low-MW polyethylene sera (mafuta). |
| Kufalikira pamwamba | Konzani mlingo wa ma coupling agent kapena sinthani ku titanate coupling agent (NDZ-201) kuti mugwirizane bwino. |
VI. Miyezo Yotsimikizira
- Mayeso a UL94 V0:
- Zitsanzo za 1.6 mm ndi 3.2 mm, nthawi yowotcha yonse <50 sec pambuyo poyatsa kawiri, palibe kuyatsa kodontha.
- LOI: Cholinga ≥30% (zenizeni ≥28%).
- Katundu Wamakina:
- Kulimba kwamphamvu> 40 MPa, mphamvu yamphamvu> 5 kJ/m² (ASTM standard).
- Thermal Stability (TGA):
- Zotsalira za Char pa 800 ° C > 20%, kutentha koyambirira kwa kuwonongeka > 300 ° C.
VII. Kupanga Zitsanzo
| Chigawo | Zomwe zili (%) |
|---|---|
| SK Polyester ES500 | 48% |
| Ultrafine ATH (yosinthidwa) | 28% |
| Aluminium Hypophosphite | 11% |
| Zinc Borate | 7% |
| MCA | 4% |
| BYK-161 Dispersant | 2.5% |
| KH-550 Coupling Agent | 1% |
| PTFE Anti-Dripping Agent | 0.8% |
| Zinc Stearate | 0.5% |
Kapangidwe kameneka ndi kamangidwe kameneka kamakwaniritsa bwino UL94 V0 flame retardancy ya SK Polyester ES500 kwinaku akulinganiza ma processability ndi makina amakina. Mayesero ang'onoang'ono amalangizidwa kuti atsimikizire kubalalitsidwa musanayambe kulinganiza bwino (monga kusanja aluminiyamu hypophosphite ndi MCA). Kuti muwongolerenso kuchedwa kwamoto, ganizirani kuwonjezera 2% boron nitride nanosheets (BNNS) ngati cholumikizira chapawiri chogwiritsa ntchito matenthedwe / choletsa moto.
More info., pls contact lucy@taifeng-fr.com
Nthawi yotumiza: Jul-01-2025
