Halogin-Free Flame Retardant Formulation for TPU Coating System Amfani da DMF Solvent
Don tsarin suturar TPU ta amfani da Dimethyl Formamide (DMF) azaman mai narkewa, yin amfani da aluminium hypophosphite (AHP) da zinc borate (ZB) azaman masu ɗaukar wuta yana buƙatar ƙima na tsari. A ƙasa akwai cikakken nazari da shirin aiwatarwa:
I. Binciken Yiwuwar Aluminum Hypophosphite (AHP)
1. Injiniyan Gyaran Wuta da Fa'idodi
- Makaniyanci:
- Yana rushewa a yanayin zafi mai girma don samar da phosphoric da metaphosphoric acid, inganta haɓakar char a cikin TPU (ƙaddamar da yanayin harshen wuta).
- Yana fitar da PO · masu tsattsauran ra'ayi don katse halayen sarkar konewa (jinkirin harshen wuta-lokacin iskar gas).
- Amfani:
- Marasa halogen, ƙananan hayaki, ƙarancin guba, mai yarda da RoHS/REACH.
- Kyakkyawan kwanciyar hankali na thermal (ruwan zafin jiki ≈300 ° C), dace da matakan bushewa TPU (yawanci <150 ° C).
2. Kalubalen Aikace-aikace da Mafita
| Kalubale | Magani |
| Rashin tarwatsawa a cikin DMF | Yi amfani da AHP da aka gyaggyara (misali, wakilin haɗin gwiwar silane KH-550). Pre-watsawa tsari: Ball-mill AHP tare da DMF da dispersant (misali, BYK-110) to barbashi size <5μm. |
| Bukatar babban lodi (20-30%) | Haɗin haɗin gwiwa tare da ZB ko melamine cyanurate (MCA) don rage jimlar lodi zuwa 15-20%. |
| Rage bayyana gaskiya | Yi amfani da AHP mai girman nano (girman barbashi <1μm) ko gauraya da madaidaicin harshen wuta (misali, kwayoyin phosphates). |
3. Shawarar Ƙirƙira da Tsari
- Misali Tsarin:
- Tushen TPU/DMF: 100 phr
- AHP da aka gyara saman: 20 phr
- Zinc borate (ZB): 5 phr (Haɗin gwiwar hana hayaki)
- Mai Watsewa (BYK-110): 1.5 phr
- Maɓalli Maɓalli:
- Pre-hada AHP tare da rarrabawa da DMF mai ɓarna a ƙarƙashin babban ƙarfi (≥3000 rpm, 30 min), sannan a haɗe tare da slurry TPU.
- Bayan-shafi bushewa: 120-150 ° C, ƙara lokaci da 10% don tabbatar da cikakken DMF evaporation.
II. Binciken Yiwuwar Zinc Borate (ZB)
1. Injiniyan Gyaran Wuta da Fa'idodi
- Makaniyanci:
- Yana samar da Layer gilashin B₂O₃ a yanayin zafi mai girma, yana toshe iskar oxygen da zafi (jinkirin harshen wuta-lokaci).
- Yana sakin ruwa mai ɗaure (~ 13%), yana diluting gas mai ƙonewa da sanyaya tsarin.
- Amfani:
- Ƙarfafa tasirin haɗin gwiwa tare da AHP ko aluminum trihydroxide (ATH).
- Kyakkyawan kawar da hayaki, manufa don aikace-aikacen ƙananan hayaki.
2. Kalubalen Aikace-aikace da Mafita
| Kalubale | Magani |
| Rashin kwanciyar hankali tarwatsawa | Yi amfani da ZB mai girman nano (<500nm) da ma'aikatan jika (misali, TegoDispers 750W). |
| Ƙarfin ƙarancin wuta mai ƙarfi (ana buƙatar babban lodi) | Yi amfani da azaman mai haɗin gwiwa (5-10%) tare da masu riƙe harshen wuta na farko (misali, AHP ko phosphorus na halitta). |
| Rage sassaucin sutura | Rayya da masu yin filastik (misali, DOP ko polyester polyols). |
3. Shawarar Ƙirƙira da Tsari
- Misali Tsarin:
- Tushen TPU/DMF: 100 phr
- ZB mai girman Nano: 8 phr
- AHP: 15 ph
- Wakilin jika (Tego 750W): 1 phr
- Maɓalli Maɓalli:
- Pre-watsa ZB a cikin DMF ta hanyar milling (girman barbashi ≤2μm) kafin a haɗe tare da slurry TPU.
- Tsawaita lokacin bushewa (misali, mintuna 30) don guje wa ragowar danshi da ke shafar jinkirin harshen wuta.
III. Ƙimar Haɗin kai na tsarin AHP + ZB
1. Haɓakar Harshen Harshen Harshen Wuta
- Gas-Hanyar Gas & Ƙarfafa-Matsalar Haɗin Kai:
- AHP yana samar da phosphorus don yin caji, yayin da ZB yana daidaita layin char kuma yana danne bayan haske.
- Haɗin LOI: 28-30%, UL94 V-0 (1.6mm) mai yiwuwa.
- Magance shan taba:
- ZB yana rage fitar da hayaki da>50% (gwajin Cone Calorimeter).
2. Shawarwari Daidaita Ayyuka
- Diyya na Kayan Kanikanci:
- Ƙara 2-3% TPU plasticizer (misali, polycaprolactone polyol) don kula da sassauci (elongation> 300%).
- Yi amfani da foda na ultrafine (AHP/ZB <2μm) don rage girman asarar ƙarfi.
- Sarrafa Tsawon Tsari:
- Kula da dankowar slurry a 2000-4000 cP (Brookfield RV, spindle 4, 20 rpm) don sutura iri ɗaya.
IV. Kwatanta tare da Matsalolin Harshen Harshen Ruwan Rara
| Siga | AHP + ZB tsarin | Liquid Phosphorus-Nitrogen FR (misali Levagard 4090N) |
| Ana lodawa | 20-30% | 15-25% |
| Wahalar Watsewa | Yana buƙatar riga-kafi (haɓaka girma/gyara saman) | Rushewar kai tsaye, babu tarwatsawa da ake buƙata |
| Farashin | Ƙananan (~$3-5/kg) | Maɗaukaki (~ $10-15/kg) |
| Tasirin Muhalli | Halogen-free, ƙananan guba | Yana iya ƙunsar halogens (dogaran samfur) |
| Rufaffen Gaskiya | Semi-translucent zuwa opaque | M sosai m |
V. Matakan Aiwatar da Nasiha
- Gwajin-Mai Girma:
- Kimanta AHP/ZB akayi daban-daban kuma a hade (saukar gradient: 10%, 15%, 20%).
- Yi la'akari da kwanciyar hankali tarwatsewa (babu natsewa bayan awa 24), canje-canjen danko, da daidaiton sutura.
- Tabbatar da Sikelin Matukin Jirgin Sama:
- Inganta yanayin bushewa (lokaci/zazzabi) da gwada jinkirin harshen wuta (UL94, LOI) da kaddarorin inji.
- Kwatanta farashi: Idan AHP+ZB ya rage farashin ta> 30% vs. ruwa FRs, yana da tasiri a tattalin arziki.
- Shiri Mai Girma:
- Haɗin kai tare da masu kaya don haɓaka AHP/ZB masterbatches da aka riga aka tarwatsa (na tushen DMF) don sauƙaƙe samarwa.
VI. Kammalawa
Tare da sarrafa tarwatsa hanyoyin sarrafawa, AHP da ZB na iya aiki azaman ingantattun masu kare harshen wuta don suturar TPU/DMF, an bayar:
- Gyaran saman ƙasa + tarwatsewar ƙarfi mai ƙarfiAna amfani da shi don hana ƙwayar ƙwayar cuta.
- AHP (na farko) + ZB (masanin haɗin gwiwa)daidaita inganci da farashi.
- Dominhigh nuna gaskiya / sassauciAbubuwan buƙatu, ruwa na phosphorus-nitrogen FRs (misali, Levagard 4090N) ya kasance mafi fifiko.
Sichuan Taifeng New Flame Retardant Co., Ltd.(ISO & REACH)
Email: lucy@taifeng-fr.com
Lokacin aikawa: Mayu-22-2025
