Kugadzirwa kwePBT Halogen-Isina Murazvo Unodzivirira
Kuti ugadzire sisitimu yekudzivirira moto isina halogen (FR) yePBT, zvakakosha kuti pave nekuenzanisa kushanda zvakanaka kwekudzivirira moto, kugadzikana kwekupisa, kuenderana kwekupisa kwekugadzirisa, uye hunhu hwemakanika.
I. Musanganiswa weCore Flame Retardant
1. Aluminum Hypophosphite + MCA (Melamine Cyanurate) + Zinc Borate
Maitiro:
- Aluminium Hypophosphite (Kugadzikana kweThermal > 300°C): Inokurudzira kuumbwa kwechar muchikamu chakakomberedzwa uye inoburitsa PO· radicals muchikamu chegasi kuti imise maitiro ekupisa.
- MCA (Kupisa kwekuora ~300°C): Kuora kwe endothermic kunoburitsa magasi asina simba (NH₃, H₂O), zvichideredza magasi anobvira uye zvinoderedza kudonha kwemvura inonyunguduka.
- Zinc Borate (Kupisa kwekuora > 300°C): Inowedzera kugadzirwa kwechai yakaita segirazi, inoderedza utsi uye kubwinya kunotevera.
Chiyero Chinokurudzirwa:
Aruminiyamu Hypophosphite (10-15%) + MCA (5-8%) + Zinc Borate (3-5%).
2. Magnesium Hydroxide Yakagadziriswa Pamusoro + Aluminum Hypophosphite + Organic Phosphinate (semuenzaniso, ADP)
Maitiro:
- Magnesium Hydroxide Yakagadziriswa (Kupisa kwekuora ~300°C): Kugadziriswa kwepamusoro (silane/titanate) kunovandudza kupararira uye kugadzikana kwekupisa uku kuchitora kupisa kusvika pakuderedza kupisa kwezvinhu.
- Organic Phosphinate (semuenzaniso, ADP, Kugadzikana kwekupisa > 300°C): Inodzivirira moto zvine simba guru, inoshanda pamwe chete nemaitiro ephosphorus-nitrogen.
Chiyero Chinokurudzirwa:
Magnesium Hydroxide (15-20%) + Aluminum Hypophosphite (8-12%) + ADP (5-8%).
II. Vatsigiri veSarudzo
- Nano Clay/Talc (2-3%): Inovandudza hunhu hwechar uye hunhu hwemakanika uku ichideredza dosage yeFR.
- PTFE (Polytetrafluoroethylene, 0.2-0.5%): Mushonga unodzivirira madonhwe emvura kudzivirira madonhwe emvura kutsva.
- Silicone Powder (2-4%): Inokurudzira kuumbwa kwechani chakasimba, ichivandudza kunonoka kwemurazvo uye kupenya kwepazasi.
III. Misanganiswa Yekudzivirira
- Aluminium Hydroxide: Inoora pa 180-200°C (pasi pekupisa kwePBT kwe220-250°C), zvichiita kuti iparare nguva isati yakwana.
- Magnesium Hydroxide Isina Kugadziriswa: Inoda kugadziriswa pamusoro pechinhu kudzivirira kuungana kwechinhu uye kuora kwekupisa panguva yekugadzirisa.
IV. Mazano Ekuvandudza Mashandiro
- Kurapa Pamusoro: Shandisa zvinhu zvinobatanidza silane pa magnesium hydroxide ne zinc borate kuti uwedzere kupararira uye kubatana kwe interfacial.
- Kudzora Kupisa Kwekugadzirisa: Iva nechokwadi chekuti tembiricha yekuora kweFR iri > 250°C kudzivirira kuora panguva yekugadzirisa.
- Kuenzanisa Kwezvinhu Zvemuchina: Isa ma nano-fillers (semuenzaniso, SiO₂) kana tougheners (semuenzaniso, POE-g-MAH) kuti utsive kurasikirwa kwesimba.
V. Muenzaniso weKugadzira Kwakajairika
| Rinodzivirira Murazvo | Kurodha (wt%) | Basa |
|---|---|---|
| Aruminiyamu Hypophosphite | 12% | FR Yekutanga (yakapfava + gasi) |
| MCA | 6% | Gas-phase FR, kudzvinyirirwa kweutsi |
| Zinc Borate | 4% | Kuumbwa kwechani inoshanda pamwe chete, kudzvinyirirwa kweutsi |
| Nano Talc | 3% | Kusimbiswa kweChar, kuvandudzwa kwemuchina |
| PTFE | 0.3% | Kudzivirira kudonha kwemvura |
VI. MaParamende Ekuyedza Akakosha
- Kudzivirira Murazvo: UL94 V-0 (1.6mm), LOI > 35%.
- Kugadzikana kwekupisa: TGA residue > 25% (600°C).
- Hunhu hweMuchina: Simba rekudhonza > 45 MPa, kukanganiswa kwakachekwa > 4 kJ/m².
Nekugadzirisa zviyero, sisitimu inoshanda isingashandise halogen-fire retardant inogona kuwanikwa ukuwo PBT ichiramba ichishanda zvakanaka.
More info., pls contact lucy@taifeng-fr.com
Nguva yekutumira: Chikunguru-01-2025
