Habka dib u dhigista ololka tixraaca ee SK Polyester ES500 (qiimaynta UL94 V0).
I. Qaabaynta Qaabaynta Habka
- Waafaqid Substrate
- SK Polyester ES500: Polyester heerkulbeeg ah oo leh heerkul hawleedka caadiga ah ee 220-260°C. Dab-demiska ololku waa inuu u adkaystaa kala duwanaanshaha heerkulkan.
- Shuruudaha Muhiimka ah: Isku dheelli tirka dib-u-dhaca ololka (V0), sifooyinka farsamaysan (xoogga jilicsan/saamaynta), iyo habaynta dareeraha.
- Nidaamka Dib u Celinta Ololka Isku-dhafka ah
- Ultrafine Aluminum Hydroxide (ATH): Dib u celi ololka aasaasiga ah, fuuqbaxa endotermic. Soodejistu waa in ay isku dheelitirto dib u dhaca ololka iyo sifooyinka farsamada.
- Aluminium Hypophosphite: Char-forming synergist, wuxuu la shaqeeyaa ATH si loo abuuro saameyn isku-dhafan fosfooraska-aluminium, hagaajinta tayada char.
- Zinc Borate: Kor u qaada char, waxay xakamaysaa qiiqa, waxayna samaysaa caqabad cufan oo leh ATH.
- MCA (Melamine Cyanurate): Dib u celi ololka wajiga-gaaska, waxa uu milo oksijiinta oo uu joojiyaa dhalaalidda.
II. Habka lagu taliyay (Boqolkiiba Miisaanka)
| Qayb | Saamiga | Farsamaynta Qoraalada |
|---|---|---|
| SK Polyester ES500 | 45-50% | Xabagta salka; dooro darajada dareeraha sare si aad u magdhabiso viscosity-ka buuxinta. |
| Ultrafine ATH | 25-30% | Dusha sare oo lagu beddelay wakiilka isku xirka silane (KH-550), D50 <3 μm. |
| Aluminium Hypophosphite | 10-12% | Kuleyl u adkaysta (>300°C), horay loogu daray ATH oo lagu daray heerar. |
| Zinc Borate | 6-8% | Lagu darey MCA si looga fogaado burburka qaabdhismeedka sare ee dhogorta. |
| MCA | 4-5% | Heerkulka habka <250°C, firidhsan xawaare hoose. |
| Kala firdhisan | 2-3% | Kala firdhiso polyester-ku habboon (tusaale, BYK-161) + wax ka samaysan polyetylen |
| Wakiilka Isku-xidhka (KH-550) | 1% | Horay u daaweeyaa ATH iyo aluminium hypophosphite; immersion ethanol oo ay ku xigto qalajinta. |
| Wakiilka ka-hortagga dhibicda | 0.5-1% | PTFE micropowder si loo xakameeyo dabka dhalaalka. |
| Hawlaha Gargaarka | 0.5% | Zinc stearate (saliid iyo ka-hortagga dhejinta). |
III. Xakamaynta Habraaca Furaha
- Hagaajinta Kala-firdhinta
- Daawaynta ka hor: Ku qooya ATH iyo aluminium hypophosphite 1% KH-550 ethanol xal 2 saacadood, ka dibna ku qallaji 80 ° C.
- Isku dhafka isku dhafka:
- Xawaaraha-hooseeya ee isku dhafka ah + firdhiye + wakiilka isku xirka (500 rpm, 5 min).
- Ku dar ATH/aluminium hypophosphite oo la beddelay → Xiritaanka xawliga sare leh (2500 rpm, 20 min).
- Ku dar zinc borate/MCA/PTFE → Isku darka xawaare hooseeya (800 rpm, 10 min).
- Qalabka: Twin-screw extruder (goobaha kulaylka: aagga quudinta 200°C, aagga dhalaalka 230°C, dhimanaya 220°C).
- Xakamaynta heerkulka
- Hubi heerkulka dhalaalka <250°C si aad uga hortagto burburka MCA (MCA waxay ku qurmaysaa 250-300°C
- Pellets biyo-qabow ka dib marka la soo saaro si looga hortago haajiridda ololka.
IV. Farsamaynta Dab-demiska Ololka
- ATH + Aluminium Hypophosphite
- ATH waxay nuugtaa kulaylka waxayna sii deysaa uumiga biyaha, waxayna miisaamaysaa gaasaska gubanaya.
- Aluminium hypophosphite waxay kicisaa samaynta dhuxusha cufan (AlPO₄), xannibaysa wareejinta kulaylka.
- Zinc Borate + MCA
- Zinc borate waxay samaysaa xayndaab quraarad ah oo kor u qaada dillaacyada dhuxusha.
- MCA waxay u jajabisaa si ay u sii deyso NH₃, oo miisaamaysa ogsijiinta waxayna joojisaa falcelinta xagjirka ah ee xorta ah.
- PTFE Ka-hortagga Dhibicda
- PTFE micropowder waxay samaysaa shabakad fayruus ah, taas oo yaraynaysa khatarta shilalka dhalaalidda.
V. Habaynta Waxqabadka & Cilad-bixinta
| Arrin guud | Xalka |
|---|---|
| Dib u dhaca ololka ee ka hooseeya V0 (V1/V2) | Kordhi aluminium hypophosphite ilaa 12% + MCA ilaa 5%, ama ku dar 2% fosfooraska cas koofiyadaysan (isku xidhka aluminium hypophosphite). |
| Guryaha farsamada oo la dhimay | Iska yaree ATH ilaa 25%, ku dar 5% fiber galaas ah (xoojin) ama 3% maleic anhydride- grafted POE (adkeynta). |
| Dheecaan ka shaqeynta oo liidata | Kordhi kala firdhiya ilaa 3%, ama ku dar 0.5% polyetylen-ka hoose ee MW (saliid). |
| Dusha oo ubaxaysa | Hagaaji qiyaasta wakiilka isku xidhka ama u beddel titanate coupling agent (NDZ-201) si loo helo xidhidh wanagsan |
VI. Qiyaasaha Xaqiijinta
- Tijaabada UL94 V0:
- 1.6 mm iyo 3.2 mm muunadaha, wadarta wakhtiga gubashada <50 sekan ka dib laba shid, ma jirto dab dami.
- LOI: Bartilmaameedka ≥30% (dhabta ≥28%).
- Guryaha Makaanikada:
- Xoog xajin> 40 MPa, awoodda saamaynta> 5 kJ/m² (heerka ASTM).
- Xasilloonida kulaylka (TGA):
- Haraaga baabuurka ee 800°C>20%, heerkulbeegga hore ee burburka>300°C.
VII. Tusaale Tixraaca Qaabaynta
| Qayb | Waxa ku jira (%) |
|---|---|
| SK Polyester ES500 | 48% |
| Ultrafine ATH (la beddelay) | 28% |
| Aluminium Hypophosphite | 11% |
| Zinc Borate | 7% |
| MCA | 4% |
| BYK-161 kala firdhiyey | 2.5% |
| KH-550 Wakiilka Isku-xidhka | 1% |
| PTFE Kahortagga Dhibicda | 0.8% |
| Zinc Stearate | 0.5% |
Qaabayntan iyo qaabaynta habraacan ayaa si wax ku ool ah u gaadhay dib u dhaca ololka UL94 V0 ee SK Polyester ES500 iyada oo la dheellitirayo karti-socodka iyo sifooyinka farsamada. Tijaabooyin yar-yar ayaa lagula talinayaa in la xaqiijiyo kala firdhisanaanta ka hor inta aan si fiican loo habeynin saamiga (tusaale, isu dheellitirka aluminium hypophosphite iyo MCA). Kordhinta dib u dhaca ololka, ka fiirso inaad ku darto 2% boron nitride nanosheets (BNNS) sidii buuxinta dab-demiska ee laba-shaqeeya.
More info., pls contact lucy@taifeng-fr.com
Waqtiga boostada: Jul-01-2025
