Kupanga Kwaulere kwa Flame Retardant ya Halogen kwa TPU Coating System Pogwiritsa Ntchito DMF Solvent
Kwa machitidwe opaka a TPU pogwiritsa ntchito Dimethyl Formamide (DMF) monga zosungunulira, kugwiritsa ntchito aluminium hypophosphite (AHP) ndi zinc borate (ZB) monga zolepheretsa moto zimafuna kuunika mwadongosolo. M'munsimu muli ndondomeko yowunikira ndi kukhazikitsa:
I. Kuthekera Kusanthula kwa Aluminium Hypophosphite (AHP)
1. Njira Yochepetsera Moto ndi Ubwino
- Njira:
- Amawola pa kutentha kwakukulu kuti apange phosphoric ndi metaphosphoric acid, kulimbikitsa mapangidwe a char mu TPU (condensed-phase flame retardancy).
- Imamasula PO· ma radicals kuti asokoneze machitidwe oyatsa (gas-phase flame retardancy).
- Ubwino:
- Zopanda halogen, utsi wochepa, kawopsedwe wochepa, wogwirizana ndi RoHS/REACH.
- Kukhazikika kwamafuta abwino (kuwola kutentha ≈300 ° C), koyenera kwa TPU kuyanika njira (nthawi zambiri <150 ° C).
2. Mavuto Ogwiritsa Ntchito ndi Mayankho
| Chovuta | Yankho |
| Kubalalikana kosauka mu DMF | Gwiritsani ntchito AHP yosinthidwa pamwamba (mwachitsanzo, silane coupling agent KH-550). Pre-kubalalitsidwa ndondomeko: Mpira-mphero AHP ndi DMF ndi dispersant (mwachitsanzo, BYK-110) kuti tinthu kukula <5μm. |
| Kufunika kokweza kwambiri (20-30%) | Kuphatikiza kwa Synergistic ndi ZB kapena melamine cyanrate (MCA) kuti muchepetse kuchuluka kwa 15-20%. |
| Kuchepetsa ❖ kuyanika poonekera | Gwiritsani ntchito nano-kakulidwe AHP (tinthu kukula <1μm) kapena kusakaniza ndi mandala flame retardants (mwachitsanzo, organic phosphates). |
3. Kukonzekera Kovomerezeka ndi Njira
- Kupanga Zitsanzo:
- TPU/DMF maziko: 100 phr
- AHP yosinthidwa pamwamba: 20 phr
- Zinc borate (ZB): 5 phr (smoke suppression synergy)
- Zosokoneza (BYK-110): 1.5 phr
- Mfundo Zofunika Kwambiri:
- Sakanizani AHP ndi dispersant ndi pang'ono DMF pansi pa kukameta ubweya wambiri (≥3000 rpm, 30 min), kenaka phatikizani ndi TPU slurry.
- Kuyanika pambuyo pakuyanika: 120-150 ° C, onjezerani nthawi ndi 10% kuti mutsimikizire kuti DMF imatuluka nthunzi.
II. Kuthekera Kusanthula kwa Zinc Borate (ZB)
1. Njira Yochepetsera Moto ndi Ubwino
- Njira:
- Amapanga B₂O₃ galasi wosanjikiza pa kutentha kwambiri, kutsekereza mpweya ndi kutentha (condensed-phase flame retardancy).
- Kutulutsa madzi omangika (~ 13%), kusungunula mpweya woyaka ndi kuziziritsa dongosolo.
- Ubwino:
- Mphamvu ya synergistic yokhala ndi AHP kapena aluminium trihydroxide (ATH).
- Kuletsa kwabwino kwa utsi, koyenera kugwiritsa ntchito utsi wochepa.
2. Mavuto Ogwiritsa Ntchito ndi Mayankho
| Chovuta | Yankho |
| Kusakhazikika kobalalika | Gwiritsani ntchito ZB ya nano-kakulidwe (<500nm) ndi zonyowetsa (mwachitsanzo, TegoDispers 750W). |
| Kuchepetsa mphamvu yamoto yochepetsera (kutsitsa kwakukulu kumafunika) | Gwiritsani ntchito ngati synergist (5-10%) yokhala ndi zoletsa moto (mwachitsanzo, AHP kapena organic phosphorous). |
| Kuchepetsa ❖ kuyanika kusinthasintha | Lipirani ndi mapulasitiki (mwachitsanzo, DOP kapena polyester polyols). |
3. Kukonzekera Kovomerezeka ndi Njira
- Kupanga Zitsanzo:
- TPU/DMF maziko: 100 phr
- Nano-size ZB: 8 phr
- AHP: 15 phr
- Wonyowetsa (Tego 750W): 1 phr
- Mfundo Zofunika Kwambiri:
- Pre-balalitsa ZB mu DMF kudzera mkanda mphero (tinthu kukula ≤2μm) pamaso kusakaniza ndi TPU slurry.
- Wonjezerani nthawi yowumitsa (monga 30 min) kuti mupewe chinyezi chotsalira chomwe chimakhudza kuchedwa kwa moto.
III. Kuwunika kwa Synergistic kwa AHP + ZB System
1. Synergistic Flame Retardant Zotsatira
- Synergy ya Gasi-Gasi & Condensed-Phase:
- AHP imapereka phosphorous pakuwotcha, pomwe ZB imakhazikika pagawo la char ndikupondereza kuwala.
- Kuphatikiza LOI: 28-30%, UL94 V-0 (1.6mm) yotheka.
- Kuletsa Utsi:
- ZB imachepetsa utsi ndi>50% (kuyesa kwa Cone Calorimeter).
2. Malangizo Osamalitsa Ntchito
- Malipiro a Katundu Wamakina:
- Onjezani 2-3% TPU plasticizer (mwachitsanzo, polycaprolactone polyol) kuti mukhalebe kusinthasintha (elongation> 300%).
- Gwiritsani ntchito ufa wa ultrafine (AHP/ZB <2μm) kuti muchepetse kutaya mphamvu kwamphamvu.
- Kuwongolera Kukhazikika:
- Sungani kukhuthala kwa slurry pa 2000-4000 cP (Brookfield RV, spindle 4, 20 rpm) pakupaka yunifolomu.
IV. Poyerekeza ndi Solvent-Based Liquid Flame Retardants
| Parameter | AHP + ZB System | Liquid Phosphorus-Nitrogen FR (monga, Levagard 4090N) |
| Kutsegula | 20-30% | 15-25% |
| Kuchulukana Kuvuta | Imafunikira chithandizo chisanachitike (kumeta ubweya wambiri / kusinthidwa kwapamwamba) | Kuwonongeka kwachindunji, palibe kubalalitsidwa kofunikira |
| Mtengo | Otsika (~$3-5/kg) | Zapamwamba (~$10-15/kg) |
| Environmental Impact | Halogen wopanda, kawopsedwe kochepa | Itha kukhala ndi ma halojeni (odalira mankhwala) |
| Kuphimba Transparency | Semi translucent mpaka opaque | Zowonekera kwambiri |
V. Njira zoyendetsera bwino
- Mayeso a Lab-Scale:
- Unikani AHP/ZB payekhapayekha komanso kuphatikiza (kutsitsa kwa gradient: 10%, 15%, 20%).
- Unikani kukhazikika kwa kubalalitsidwa (palibe matope pambuyo pa 24h), kusintha kwa mamachulukidwe, ndi ❖ kuyanika kufanana.
- Kutsimikizika kwa Sikelo:
- Konzani zowumitsa (nthawi / kutentha) ndikuyesa kuzizira kwamoto (UL94, LOI) ndi makina amakina.
- Yerekezerani mtengo: Ngati AHP + ZB imachepetsa mtengo ndi> 30% motsutsana ndi madzi FRs, ndizopindulitsa pachuma.
- Kukonzekera Sikelo:
- Gwirizanani ndi ogulitsa kuti mupange masterbatches obalalitsidwa a AHP/ZB (DMF-based) kuti apange zosavuta.
VI. Mapeto
Ndi njira zoyendetsedwa zobalalitsidwa, AHP ndi ZB zitha kukhala zoziziritsira moto zoyatsira TPU/DMF, ngati:
- Kusintha kwapamtunda + kubalalitsidwa kwakukulu kwameta ubweyaumagwiritsidwa ntchito kuteteza tinthu agglomeration.
- AHP (primary) + ZB (synergist)kulinganiza bwino ndi mtengo.
- Zakuwonekera kwakukulu / kusinthasinthazofunika, madzi phosphorous-nayitrogeni FRs (mwachitsanzo, Levagard 4090N) kukhala bwino.
Sichuan Taifeng New Flame Retardant Co., Ltd. (ISO & REACH)
Email: lucy@taifeng-fr.com
Nthawi yotumiza: May-22-2025
