PBT Cov Qauv Siv Los Ua Cov Khoom Siv Hluav Taws Xob Tsis Muaj Halogen
Yuav kom ua tau zoo tshaj plaws ntawm cov tshuaj tua hluav taws uas tsis muaj halogen rau PBT, nws yog ib qho tseem ceeb kom sib npaug qhov ua tau zoo ntawm cov tshuaj tua hluav taws, kev ruaj khov ntawm thermal, kev sib raug zoo ntawm qhov kub thiab txias, thiab cov khoom siv kho tshuab. Hauv qab no yog ib txoj kev sib xyaw ua ke zoo tshaj plaws nrog cov kev tshuaj xyuas tseem ceeb:
1. Cov Khoom Siv Hluav Taws Xob Tseem Ceeb
Xaiv 1: Aluminium Hypophosphite + MCA (Melamine Cyanurate) + Zinc Borate
Lub Tshuab:
- Aluminium Hypophosphite (Thermal stability > 300°C): Txhawb kev tsim cov char hauv theem condensed thiab tso tawm PO· radicals hauv theem roj los cuam tshuam cov tshuaj combustion chain reactions.
- MCA (Kev lwj ntawm ~300°C): Kev lwj ntawm cov khoom siv hluav taws xob (endothermic decomposition) tso tawm cov pa roj inert (NH₃, H₂O), ua rau cov pa roj uas yooj yim hlawv thiab tiv thaiv kev yaj ntawm cov dej ntws.
- Zinc Borate (Kev lwj > 300°C): Ua kom cov xim av zoo li iav zoo nkauj dua, txo cov pa luam yeeb thiab cov teeb ci ntsa iab.
Qhov Piv Txwv Pom Zoo:
- Aluminium Hypophosphite (10-15%) + MCA (5-8%) + Zinc Borate (3-5%).
Xaiv 2: Magnesium Hydroxide Hloov Kho Nto + Aluminium Hypophosphite + Organic Phosphonate (piv txwv li, ADP)
Lub Tshuab:
- Magnesium Hydroxide Hloov Kho (Kev lwj ~300°C): Kev kho qhov chaw (silane/titanate) txhim kho kev sib kis thiab kev ruaj khov ntawm thermal; kev txias endothermic txo qhov kub ntawm cov khoom.
- Organic Phosphonate (piv txwv li, ADP, thermal stability > 300°C): Cov tshuaj tua hluav taws zoo heev, ua haujlwm nrog cov kab ke phosphorus-nitrogen.
Qhov Piv Txwv Pom Zoo:
- Magnesium Hydroxide (15-20%) + Aluminium Hypophosphite (8-12%) + ADP (5-8%).
2. Cov Neeg Sib Koom Tes Xaiv Tau
- Nano-clay/Talc (2-3%): Txhim kho qhov zoo ntawm cov char thiab cov khoom siv kho tshuab thaum txo cov khoom siv tiv thaiv hluav taws.
- PTFE (0.2-0.5%): Tus neeg sawv cev tiv thaiv kom tsis txhob muaj dej ntws los tiv thaiv cov dej ntws kub hnyiab.
- Hmoov Silicone (2-4%): Txhawb kom muaj cov char ntom ntom, ua kom cov nplaim taws tsis kub hnyiab thiab ua kom qhov chaw ci ntsa iab.
3. Kev Sib Xyaws Ua Ke Yuav Tsum Tsis Txhob Ua
- Aluminium Hydroxide: Yuav lwj thaum kub txog 180-200°C (qis dua qhov kub ua PBT ntawm 220-250°C), ua rau lwj ua ntej lub sijhawm.
- Magnesium Hydroxide Tsis Hloov Kho: Yuav tsum tau kho qhov chaw kom tiv thaiv kev sib sau ua ke thiab kev puas tsuaj los ntawm cua sov thaum lub sijhawm ua haujlwm.
4. Cov Lus Qhia Txog Kev Txhim Kho Kev Ua Haujlwm
- Kev Kho Mob Nto: Siv cov neeg sawv cev silane coupling rau Mg (OH) ₂ thiab zinc borate los txhim kho kev sib kis thiab kev sib txuas ntawm cov khoom sib txuas.
- Kev Tswj Kub ntawm Kev Ua Haujlwm: Xyuas kom qhov kub ntawm cov khoom uas tsis kub hnyiab > 250°C kom tsis txhob puas tsuaj.
- Kev Sib Npaug ntawm Cov Khoom Siv Kho Tshuab: Them rau qhov poob zog siv cov nano-fillers (piv txwv li, SiO₂) lossis cov khoom tawv (piv txwv li, POE-g-MAH).
5. Piv txwv kev tsim qauv
| Hluav Taws Kub Tiv Thaiv | Thauj khoom (wt%) | Kev Ua Haujlwm |
|---|---|---|
| Aluminium Hypophosphite | 12% | Cov nplaim taws tseem ceeb (condensed + gas theem) |
| MCA | 6% | Cov nplaim taws uas tsis yog roj, kev tswj pa luam yeeb |
| Zinc Borate | 4% | Kev tsim cov char synergistic, txo cov pa luam yeeb |
| Nano Talc | 3% | Kev txhawb nqa char, kev txhim kho mechanical |
| PTFE | 0.3% | Tiv thaiv kev ntws dej |
6. Cov Kev Ntsuas Tseem Ceeb
- Hluav Taws Kub Tiv Thaiv: UL94 V-0 (1.6mm), LOI > 35%.
- Kev Ruaj Ntseg Thermal: TGA residue > 25% (600 ° C).
- Cov Khoom Siv Kho Tshuab: Lub zog Tensile > 45 MPa, qhov cuam tshuam notched > 4 kJ / m².
Los ntawm kev kho kom zoo dua cov piv, kev ua haujlwm siab halogen-free flame retardancy tuaj yeem ua tiav thaum tswj hwm PBT qhov kev ua tau zoo tag nrho.
More info., pls send email to lucy@taifeng-fr.com
Lub sijhawm tshaj tawm: Lub Xya Hli-08-2025
