Nhanganyaya kune Nitrogen-Yakavakirwa Flame Retardants yeNylon
Nitrogen-based flame retardants inotaridzwa nehuturu hwakaderera, kusaora, kudziya uye UV kugadzikana, yakanaka-inodzoreredza murazvo, uye mutengo-kushanda. Nekudaro, zvipingamupinyi zvavo zvinosanganisira matambudziko ekugadzirisa uye kupararira kwakashata mune polymer matrix. Kazhinji nitrogen-based flame retardants yenylon inosanganisira MCA (melamine cyanrate), melamine, uye MPP (melamine polyphosphate).
Iyo nzira yekudzosa moto inosanganisira zvinhu zviviri:
- "Sublimation uye Endothermic" Physical Mechanism: Iyo murazvo inodzoreredza inoderedza tembiricha yepasi pe polymer zvinhu uye inoitsaura kubva kumhepo kuburikidza ne sublimation uye kupisa kupisa.
- Catalytic Carbonization uye Intumescent Mechanism muCondensed Phase: Iyo murazvo unodzoreredza unopindirana nenylon, inosimudzira yakananga carbonization uye kuwedzera.
MCA inoratidza mabasa maviri ari mumurazvo-retardant process, kusimudzira zvese kabhoni uye kupupa furo. Iyo nzira inodzora murazvo uye kushanda kwayo kunosiyana zvichienderana nerudzi rwenaironi. Zvidzidzo paMCA neMPP muPA6 nePA66 zvinoburitsa kuti izvi zvinodzosa moto zvinokonzeresa kuyambuka muPA66 asi zvinokurudzira kudzikira muPA6, zvichikonzera kuita kurinani-kudzoreredza moto muPA66 kupfuura muPA6.
1. Melamine Cyanrate (MCA)
MCA inogadzirwa kubva ku melamine uye cyanuric acid mumvura, ichigadzira hydrogen-bonded adduct. Iyo yakanakisa halogen-isina, yakaderera-chepfu, uye yakaderera-inopfungaira murazvo wemoto inowanzoshandiswa mumapolima enylon. Nekudaro, yechinyakare MCA ine yakakwira kunyungudika (kuora uye sublimating pamusoro pe400 ° C) uye inogona chete kusanganiswa neresin muchimiro chakasimba chechikamu, zvichitungamira kupararira kusina kuenzana uye hukuru hukuru, izvo zvinokanganisa kusashanda kwemoto. Pamusoro pezvo, MCA inonyanya kushanda muchikamu chegasi, zvichikonzera kuderera kwechar kuumbwa uye yakasununguka, isingadziviriri kabhoni maseru panguva yekupisa.
Kugadzirisa nyaya idzi, tekinoroji inoumba tekinoroji yakashandiswa kugadzirisa MCA nekuunza inopindirana murazvo-retardant additive (WEX), iyo inodzikisa nzvimbo yekunyungudika yeMCA, ichigonesa kunyunguduka uye kwekupedzisira-kwakanaka kupararira nePA6. WEX inowedzerawo kuumbwa kwechar panguva yekupisa, kuvandudza kunaka kwekabhoni layer uye kusimbisa iyo yakapfupika-chikamu-inodzoreredza murazvo weMCA, nekudaro ichigadzira zvinhu zvinodzora murazvo zvine mashandiro akanaka.
2. Intumescent Flame Retardant (IFR)
IFR yakakosha halogen-isina flame-retardant system. Zvakanakira pamusoro pehalogenated flame retardants zvinosanganisira yakaderera utsi emission uye isina-chepfu gasi kuburitswa panguva yekupisa. Zvakare, iyo char layer yakaumbwa neIFR inogona kutora yakanyungudutswa, inopisa polymer, kudzivirira kudonha uye kupararira kwemoto.
Zvikamu zvakakosha zve IFR zvinosanganisira:
- Gasi rinobva (melamine-based compounds)
- Acid source (phosphorus-nitrogen flame retardants)
- Carbon source (nylon pachayo)
- Synergistic additives (semuenzaniso, zinc borate, aluminium hydroxide) uye anti-dripping agents.
Kana huwandu hwehuwandu hwephosphorus-nitrogen flame retardants kune melamine-based compounds ndeye:
- Pazasi pe1%: Kusakwana kwemoto-retardant maitiro.
- Pamusoro pe30%: Volatilization inoitika panguva yekugadzirisa.
- Pakati pe1% -30% (kunyanya 7% -20%): Yakanyanya kunaka-inodzoreredza murazvo kuita pasina kukanganisa processability.
More info., pls contact lucy@taifeng-fr.com
Nguva yekutumira: Aug-19-2025
