Ukwakheka Okungashisi I-PBT Halogen-Free Flame Retardant

Ukwakheka Okungashisi I-PBT Halogen-Free Flame Retardant

Ukuze uthuthukise uhlelo lwe-halogen-free flame retardant (FR) lwe-PBT, kubalulekile ukulinganisela ukusebenza kahle kwe-flame retardancy, ukuzinza kokushisa, ukuhambisana kwezinga lokushisa lokucubungula, kanye nezakhiwo zemishini.

I. Izinhlanganisela Ezivimbela Umlilo Eziyinhloko

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

Indlela yokusebenza:

• I-Aluminium Hypophosphite (Ukuqina kokushisa > 300°C): Ikhuthaza ukwakheka kwe-char esigabeni esihlanganisiwe futhi ikhipha ama-PO· radicals esigabeni segesi ukuze iphazamise ukusabela kweketanga lokushiswa.
• I-MCA (Izinga lokushisa lokubola ~300°C): Ukubola kwe-Endothermic kukhipha amagesi angasasebenzi (NH₃, H₂O), kunciphisa amagesi avuthayo futhi kuvimbele ukuvuza okuncibilikayo.
• I-Zinc Borate (Izinga lokushisa lokubola > 300°C): Ithuthukisa ukwakheka kwe-char efana nengilazi, inciphisa intuthu kanye nokukhanya kwangemuva.

Isilinganiso Esinconyiwe:
I-Aluminium Hypophosphite (10-15%) + MCA (5-8%) + Zinc Borate (3-5%).

2. I-Magnesium Hydroxide Eguquliwe Ngaphezulu + I-Aluminium Hypophosphite + I-Organic Phosphinate (isib. I-ADP)

Indlela yokusebenza:

• I-Magnesium Hydroxide Eguquliwe (Izinga lokushisa lokubola ~300°C): Ukwelashwa kwendawo (i-silane/titanate) kuthuthukisa ukuhlakazeka kanye nokuqina kokushisa ngenkathi kudonswa ukushisa kuye ekushiseni kwezinto.
• I-Phosphinate Engokwemvelo (isb., i-ADP, Ukuqina Kokushisa > 300°C): I-retardant yomlilo esebenza kahle kakhulu yesigaba segesi, esebenzisana nezinhlelo ze-phosphorus-nitrogen.

Isilinganiso Esinconyiwe:
I-Magnesium Hydroxide (15-20%) + I-Aluminium Hypophosphite (8-12%) + I-ADP (5-8%).

II. Ama-Synergists Okuzikhethela

• I-Nano Clay/Talc (2-3%): Ithuthukisa ikhwalithi ye-char kanye nezakhiwo zemishini ngenkathi inciphisa umthamo we-FR.
• I-PTFE (i-Polytetrafluoroethylene, 0.2-0.5%): I-ejenti elwa nokuconsa ukuze ivimbele ukusha kwamaconsi.
• I-Silicone Powder (2-4%): Ikhuthaza ukwakheka kwe-char ejiyile, ithuthukisa ukubambezeleka komlilo kanye nokucwebezela kobuso.

III. Izinhlanganisela Okufanele Zigwenywe

• I-Aluminium Hydroxide: Iyabola ku-180-200°C (ngaphansi kwezinga lokushisa lokucubungula le-PBT elingu-220-250°C), okuholela ekuwohlokeni kwangaphambi kwesikhathi.
• I-Magnesium Hydroxide Engashintshiwe: Idinga ukwelashwa kwendawo ukuze kuvinjelwe ukuhlangana kanye nokubola kokushisa ngesikhathi sokucubungula.

IV. Izincomo Zokuthuthukisa Ukusebenza

1. Ukwelashwa Komphezulu: Sebenzisa ama-ejenti okuhlanganisa i-silane ku-magnesium hydroxide kanye ne-zinc borate ukuze uthuthukise ukusabalala kanye nokubopha okuphakathi.
2. Ukulawulwa Kokushisa Kokucubungula: Qinisekisa ukuthi izinga lokushisa lokubola kwe-FR lingaphezulu kuka-250°C ukuze ugweme ukubola ngesikhathi sokucubungula.
3. Ibhalansi Yempahla Yomshini: Faka ama-nano-filler (isb., i-SiO₂) noma ama-tougheners (isb., i-POE-g-MAH) ukuze ubuyisele ukulahleka kwamandla.

V. Isibonelo Sokwakheka Esijwayelekile

VI. Amapharamitha Okuhlola Okubalulekile

• Ukumelana Nokushisa Komlilo: UL94 V-0 (1.6mm), LOI > 35%.
• Ukuzinza Kokushisa: Izinsalela ze-TGA > 25% (600°C).
• Izakhiwo Zomshini: Amandla okunamathela > 45 MPa, umthelela onamachashazi > 4 kJ/m².

Ngokwenza ngcono izilinganiso, uhlelo olusebenzayo lokuvimbela ilangabi olungenalo i-halogen lungatholakala ngenkathi kugcinwa ukusebenza kwe-PBT iyonke.

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