Kupanga kwa PBT Halogen-Free Flame Retardant

Kupanga kwa PBT Halogen-Free Flame Retardant

Kuti pakhale njira yochepetsera moto yopanda halogen (FR) ya PBT, ndikofunikira kuti pakhale kulinganiza bwino momwe moto umagwirira ntchito, kukhazikika kwa kutentha, kuyanjana kwa kutentha kwa ntchito, komanso mawonekedwe a makina.

I. Kuphatikiza Kosatha kwa Moto Wapakati

1. Aluminium Hypophosphite + MCA (Melamine Cyanurate) + Zinc Borate

Njira:

• Aluminium Hypophosphite (Kukhazikika kwa kutentha > 300°C): Imalimbikitsa kupangika kwa char mu gawo lofupikitsidwa ndikutulutsa ma PO· radicals mu gawo la mpweya kuti asokoneze machitidwe a unyolo woyaka.
• MCA (Kutentha kwa Kuwola ~300°C): Kuwola kwa Endothermic kumatulutsa mpweya wosagwira ntchito (NH₃, H₂O), kumachepetsa mpweya woyaka ndikuletsa kutuluka kwa madzi osungunuka.
• Zinc Borate (Kutentha kwa kutentha > 300°C): Imawonjezera kupangika kwa ma char ngati galasi, kuchepetsa utsi ndi kuwala kwa dzuwa.

Chiŵerengero Chovomerezeka:
Aluminium Hypophosphite (10-15%) + MCA (5-8%) + Zinc Borate (3-5%).

2. Magnesium Hydroxide Yosinthidwa Pamwamba + Aluminium Hypophosphite + Organic Phosphinate (monga, ADP)

Njira:

• Magnesium Hydroxide Yosinthidwa (Kutentha kwa Kuwola ~300°C): Kukonza pamwamba (silane/titanate) kumathandizira kufalikira ndi kukhazikika kwa kutentha pamene kumatenga kutentha mpaka kutentha kochepa.
• Organic Phosphinate (monga, ADP, Kutentha kokhazikika > 300°C): Yogwira ntchito bwino kwambiri yoletsa moto wa gasi, yogwirizana ndi machitidwe a phosphorous-nayitrogeni.

Chiŵerengero Chovomerezeka:
Magnesium Hydroxide (15-20%) + Aluminium Hypophosphite (8-12%) + ADP (5-8%).

II. Ogwirizana Osankha

• Nano Clay/Talc (2-3%): Imakweza khalidwe la char ndi mphamvu zake zamagetsi pamene ikuchepetsa mlingo wa FR.
• PTFE (Polytetrafluoroethylene, 0.2-0.5%): Choletsa kudontha madzi kuti asapse madontho.
• Ufa wa silikoni (2-4%): Umalimbikitsa kupangika kwa ma char ochuluka, kukulitsa kuchedwa kwa moto ndi kunyezimira kwa pamwamba.

III. Kuphatikiza Koyenera Kupewa

• Aluminiyamu Hydroxide: Imawola pa 180-200°C (kutsika kwa kutentha kwa PBT processing kwa 220-250°C), zomwe zimapangitsa kuti iwonongeke msanga.
• Magnesium Hydroxide Yosasinthidwa: Imafunika kukonza pamwamba kuti ipewe kusonkhana ndi kuwola kwa kutentha panthawi yokonza.

IV. Malangizo Okonza Magwiridwe Antchito

1. Chithandizo cha pamwamba: Gwiritsani ntchito zinthu zolumikizira za silane pa magnesium hydroxide ndi zinc borate kuti muwonjezere kufalikira ndi kulumikizana kwa interfacial.
2. Kuwongolera Kutentha kwa Processing: Onetsetsani kuti kutentha kwa FR kuwonongeka > 250°C kuti mupewe kuwonongeka panthawi yokonza.
3. Kuchuluka kwa Katundu wa Makina: Phatikizani ma nano-fillers (monga, SiO₂) kapena tougheners (monga, POE-g-MAH) kuti mulipire kutayika kwa mphamvu.

V. Chitsanzo Chachizolowezi Chopangira

VI. Magawo Oyesera Ofunika

• Kubwerera kwa Lawi: UL94 V-0 (1.6mm), LOI > 35%.
• Kukhazikika kwa Kutentha: Zotsalira za TGA > 25% (600°C).
• Kapangidwe ka Makina: Mphamvu yolimba > 45 MPa, kukhudza kocheperako > 4 kJ/m².

Mwa kukonza bwino ma ratios, njira yothandiza yochepetsera moto yopanda halogen ikhoza kukwaniritsidwa pamene ikusunga magwiridwe antchito onse a PBT.

More info., pls contact lucy@taifeng-fr.com