PVC nplaim Retardant Masterbatch Reference Formulation
Tsim thiab ua kom zoo dua ntawm PVC nplaim taws retardant masterbatch formulations, sib txuas cov nplaim hluav taws xob uas twb muaj lawm thiab cov khoom siv sib xyaw ua ke tseem ceeb, tsom rau UL94 V0 nplaim taws retardancy (kho rau V2 los ntawm kev txo cov nyiaj ntxiv).
I. Daim Ntawv Pom Zoo Pom Zoo (Rigid PVC)
Plastic Flame Retardant Formulation:
| Cheebtsam | Kev thauj khoom (wt%) | Function Description |
|---|---|---|
| PVC cob (SG-5 hom) | 40-50% | Cov khoom siv matrix, nyiam dua qib roj-absorption |
| Aluminium hypophosphite | 12-15% | Acid qhov chaw rau tsim char, suppresses afterglow |
| Zinc borate | 8-10% | Synergistic pa luam yeeb tua, reacts nrog HCl los ntawm PVC decomposition |
| Nto hloov kho aluminium hydroxide | 10-12% | Endothermic txias, yuav tsum tau silane coupling tus neeg sawv cev txheej (decomposition temp. matches PVC ua) |
| Antimony trioxide (Sb₂O₃) | 3-5% | Core synergist, txhim kho cov nplaim hluav taws xob ntawm Cl-Sb synergy |
| Zinc molybdate (Cov pa luam yeeb suppressant) | 5-8% | Pom zoo ntxiv, txo cov pa luam yeeb ntom ntom (qhov tseem ceeb rau kev ua raws DIN 4102) |
| Dipentaerythritol (DPE) | 2-3% | Char-forming pab, txhim kho yaj-drip tswj |
| Thermal Stabilizer (Ca-Zn Composite) | 3-4% | Qhov tseem ceeb los tiv thaiv thermal degradation thaum ua |
| Plasticizer (DOP lossis eco-alternative) | 0-8% | Kho rau hardness (yeem rau nruj PVC) |
| Lubricant (calcium stearate) | 1-1.5% | Txhim kho kev ua tau zoo, tiv thaiv cov menyuam nplaum |
| Kev pab cuam (ACR) | 1-2% | Txhim kho plastification thiab masterbatch dispersion |
II. Cov Ntsiab Cai Txhim Kho Qhov Tseem Ceeb
- Nplaim Retardant Synergy System
- Cl-Sb Synergy: PVC's inherent chlorine (56%) ua ke nrog 3-5% Sb₂O₃ tsim SbCl₃ barrier, ua kom muaj roj-theem / condensed-theem dual-action nplaim taws retardancy.
- Kev haus luam yeeb: Zinc molybdate + zinc borate txo cov pa luam yeeb ntau> 40% (ASTM E662).
- Char Enhancement: Aluminium hypophosphite + DPE generates cross-linked phosphoric ester char at 200–250°C, compensating for PVC's pre-stage char deficiency.
- Ua Adaptability
- Kub sib txuam: Aluminium hypophosphite (decomposition ≥250 ° C) thiab nto-hloov Al (OH) ₃ (ruaj khov rau > 200 ° C) nplua PVC ua (160-190 ° C).
- Kev ruaj ntseg ruaj ntseg: Ca-Zn stabilizers tiv thaiv resin degradation los ntawm HCl tso tawm; ACR pab plastification nyob rau hauv high-filler systems.
- Performance Balance
- Tag nrho cov nplaim retardant loading: 35-45%, tensile zog tuav ≥80% (ib txwm ≥40 MPa rau nruj PVC).
- Rau kev yooj yim (piv txwv li PVC), hloov DOP nrog 8% epoxidized soybean roj (dual plasticizer / nplaim retardant).
III. Test & Validation Metrics
Nplaim Retardancy:
- UL94 V0 (1.6 hli thickness)
- Kev txwv Oxygen Index (LOI) ≥32%
Tswj kev haus luam yeeb:
- NBS pam tuag chamber test: Qhov siab tshaj plaws ntawm qhov muag pomDs≤ 150 (hom nplaim taws)
Mechanical Properties:
- Tensile zog ≥35 MPa (nruj), elongation ntawm tawg ≥200% (hloov tau)
Thermal stability:
- DMA lees paub tias tsis muaj qhov hloov pauv ntawm 180 ° C.
IV. Nqi & Eco-phooj ywg hloov kho
Tus nqi qis tshaj lwm txoj kev:
- Txo zinc molybdate rau 3%, ib nrab hloov Al (OH)₃ nrog Mg (OH)₂ (nce mus rau 15%).
Antimony-Dawb Solution:
- Tshem tawm Sb₂O₃, siv 2% aluminium diethylphosphinate + 5% nano-kaolin (me ntsis qis dua; yuav tsum muaj 3 hli tuab rau V0).
Haus luam yeeb yam tseem ceeb:
- Ntxiv 1% silicone resin-coated carbon dub ntxiv kom txo cov pa luam yeeb los ntawm 15%.
V. Cov Txheej Txheem Ua Haujlwm
- Mixing Sequence:
PVC cob → stabilizer + lubricant → nplaim retardants (tsawg kom siab ceev) → plasticizer (txhaj tshuaj ntxiv kawg). - Kev Ua Haujlwm Kub:
Twin-ntsia hlau extruder zones: 160 ° C (feem) → 170 ° C (melting) → 180 ° C (sib tov) → 175 ° C (lub taub hau tuag). - Masterbatch Concentration:
Pom zoo 50% kev thauj khoom; dilute 1: 1 nrog nkauj xwb PVC rau kawg-siv txhaj molding.
Cov qauv no sib npaug cov nplaim hluav taws kub, tsis muaj pa taws, thiab kev ua haujlwm ruaj khov. Cov kev sim me me tau qhia ua ntej scaling, nrog rau kev hloov kho raws li cov khoom siv (cov ntawv txheeb, cables, thiab lwm yam).
More info., pls contact lucy@taifeng-fr.com
Lub sij hawm xa tuaj: Plaub Hlis-08-2025
