Sebopeho sa Halogen-Free Flame Retardant bakeng sa TPU Coating System Ho Sebelisa DMF Solvent
Bakeng sa mekhoa ea ho roala ea TPU e sebelisang Dimethyl Formamide (DMF) e le solvent, tšebeliso ea aluminium hypophosphite (AHP) le zinc borate (ZB) e le li-flame retardants e hloka tlhahlobo e hlophisitsoeng. Ka tlase ke tlhahlobo e qaqileng le moralo oa ts'ebetsong:
I. Tlhahlobo ea ho khoneha ha Aluminium Hypophosphite (AHP)
1. Mokhoa le Melemo ea ho Fokotsa Lelakabe
- Mokhoa:
- E bola ka mocheso o phahameng ho hlahisa phosphoric le metaphosphoric acid, e khothalletsang ho thehoa ha char ho TPU (condensed-phase flame retardancy).
- E lokolla PO· radicals ho sitisa tšebetso ea ketane ea ho tuka (gas-phase flame retardancy).
- Melemo:
- Halogen ha e na mosi o tlase, chefo e tlase, e tsamaellana le RoHS/REACH.
- Botsitso bo botle ba mocheso (mocheso oa ho bola ≈300 ° C), o loketse mekhoa ea ho omisa ea TPU (ka tloaelo <150 ° C).
2. Mathata a Kopo le Litharollo
| Phephetso | Tharollo |
| Phallo e mpe ho DMF | Sebelisa AHP e fetotsoeng holimo (mohlala, silane coupling agent KH-550). Tshebetso ea ho hasana pele: Ball-mill AHP e nang le DMF le dispersant (mohlala, BYK-110) ho boholo ba likaroloana <5μm. |
| Tlhokahalo e phahameng ea ho kenya (20-30%) | Motsoako oa Synergistic le ZB kapa melamine cyanrate (MCA) ho fokotsa palo eohle ea 15-20%. |
| Phokotso ea ho roala pepeneneng | Sebelisa nano-size AHP (karolo ea boholo <1μm) kapa kopanya le li-flame retardants tse bonaletsang (mohlala, li-organic phosphates). |
3. Tlhahiso le Ts'ebetso e khothalelitsoeng
- Sebopeho sa Mehlala:
- TPU/DMF motheo: 100 phr
- AHP e fetotsoeng ka holim'a metsi: 20 phr
- Zinc borate (ZB): 5 phr (smoke suppression synergy)
- Dipersant (BYK-110): 1.5 phr
- Lintlha tsa Bohlokoa tsa Ts'ebetso:
- Pele ho kopanya AHP le dispersant le karolo e itseng ea DMF tlas'a ho kuta e phahameng (≥3000 rpm, 30 min), ebe o kopanya le TPU slurry.
- Ho omisa ka mor'a ho koahela: 120-150 ° C, eketsa nako ka 10% ho netefatsa hore DMF e fetoha mouoane ka ho feletseng.
II. Tlhahlobo ea ho khoneha ha Zinc Borate (ZB)
1. Mokhoa le Melemo ea ho Fokotsa Lelakabe
- Mokhoa:
- E etsa lera la khalase ea B₂O₃ mochesong o phahameng, e thibelang oksijene le mocheso (condensed-phase flame retardancy).
- E lokolla metsi a tlamiloeng (~ 13%), ho hlapolla likhase tse tukang le ho pholisa tsamaiso.
- Melemo:
- Tšusumetso e matla ea synergistic e nang le AHP kapa aluminium trihydroxide (ATH).
- Khatello e ntle ea mosi, e loketseng lits'ebetso tsa mosi o tlase.
2. Mathata a Kopo le Litharollo
| Phephetso | Tharollo |
| Botsitso bo bobe ba ho hasana | Sebelisa ZB e boholo ba nano (<500nm) le lisebelisoa tsa ho kolobisa (mohlala, TegoDispers 750W). |
| Ts'ebetso e tlase ea ho khutlisa lelakabe (ho hlokahala ho laela haholo) | Sebelisa e le synergist (5-10%) le li-primary retardants (mohlala, AHP kapa organic phosphorus). |
| Fokotsa barbotage tenyetsehang | Ho lefa ka li-plasticizers (mohlala, DOP kapa polyester polyols). |
3. Tlhahiso le Ts'ebetso e khothalelitsoeng
- Sebopeho sa Mehlala:
- TPU/DMF motheo: 100 phr
- Nano-size ZB: 8 phr
- AHP: 15 phr
- Moemeli oa ho kolobisa (Tego 750W): 1 phr
- Lintlha tsa Bohlokoa tsa Ts'ebetso:
- Hlakola pele ho ZB ho DMF ka ho sila lifaha (saese ea boholo ba ≤2μm) pele u kopanya le TPU slurry.
- Eketsa nako ea ho omisa (mohlala, 30 min) ho qoba mongobo o setseng o amang ho lieha ha lelakabe.
III. Tlhahlobo ea Synergistic ea AHP + ZB System
1. Synergistic Flame Retardant Liphello
- Tšebelisano-Mokhahlelo oa Khase le Mokhahlelo o Koetsoeng:
- AHP e fana ka phosphorus bakeng sa ho chara, ha ZB e tsitsisa char layer le ho hatella khanya e ka morao.
- LOI e kopantsoeng: 28-30%, UL94 V-0 (1.6mm) e ka finyelloang.
- Khatello ea Mosi:
- ZB e fokotsa ho tsoa ha mosi ka >50% (teko ea Cone Calorimeter).
2. Litlhahiso tsa ho leka-lekanya ts'ebetso
- Matšeliso a Thepa ea Mechini:
- Eketsa 2-3% TPU plasticizer (mohlala, polycaprolactone polyol) ho boloka ho feto-fetoha ha maemo (elongation> 300%).
- Sebelisa li-ultrafine powders (AHP / ZB <2μm) ho fokotsa tahlehelo ea matla a thata.
- Taolo ea Botsitso:
- Boloka viscosity ea slurry ho 2000-4000 cP (Brookfield RV, spindle 4, 20 rpm) bakeng sa ho roala junifomo.
IV. Ha ho bapisoa le Solvent-Based Liquid Flame Retardants
| Paramethara | Sistimi ea AHP + ZB | Liquid Phosphorus-Nitrogen FR (mohlala, Levagard 4090N) |
| Loading | 20-30% | 15-25% |
| Bothata ba ho hasana | E hloka kalafo ea pele (ho shear e phahameng / phetoho ea bokaholimo) | Ho qhalana ka ho otloloha, ha ho hlokahale ho hasana |
| Litšenyehelo | Tlase (~$3-5/kg) | Holimo (~$10-15/kg) |
| Tšusumetso ea Tikoloho | Halogen-mahala, chefo e tlase | E ka ba le li-halogens (tse itšetlehileng ka sehlahisoa) |
| Coating Transparency | Semi-translucent ho opaque | E pepeneneng haholo |
V. Mehato ea Phethahatso e khothalelitsoeng
- Liteko tsa Lab-Scale:
- Lekola AHP/ZB ka bomong le ka kopanelo (ho roala likhahla: 10%, 15%, 20%).
- Lekola botsitso ba ho hasana (ha ho na sedimentation ka mor'a 24h), liphetoho tsa viscosity, le ho lumellana ha seaparo.
- Netefatso ea Sekala sa Pilot:
- Ntlafatsa maemo a ho omisa (nako / mocheso) le tlhahlobo ea lelakabe la teko (UL94, LOI) le thepa ea mochini.
- Bapisa litšenyehelo: Haeba AHP+ZB e fokotsa litšenyehelo ka > 30% vs. liquid FRs, e ka sebetsa moruong.
- Boitokisetso ba ho Eketsa:
- Sebelisana 'moho le barekisi ho theha li-masterbatches tse hasantsoeng pele tsa AHP/ZB (DMF-based) bakeng sa tlhahiso e nolofalitsoeng.
VI. Qetello
Ka mekhoa e laoloang ea ho hasana, AHP le ZB li ka sebetsa e le li-retardants tse sebetsang hantle bakeng sa liphahlo tsa TPU/DMF, hafeela:
- Phetoho ea bokaholimo + phallo e phahameng ea ho kutae sebelisoa ho thibela particle agglomeration.
- AHP (ea mantlha) + ZB (synergist)e leka-lekanya katleho le litšenyehelo.
- Bakeng sapepeneneng e phahameng/bofetohelilitlhoko, metsi phosphorus-nitrogen FRs (mohlala, Levagard 4090N) li lula li le molemo.
Sichuan Taifeng New Flame Retardant Co., Ltd.(ISO & REACH)
Email: lucy@taifeng-fr.com
Nako ea poso: May-22-2025
