Sebopeho sa PBT se se nang Halogen se Sireletsang Mollo

Sebopeho sa PBT se se nang Halogen se Sireletsang Mollo

Ho ntshetsa pele sistimi ya halogen-free flame retardant (FR) bakeng sa PBT, ho bohlokwa ho leka-lekanya bokgoni ba ho thibela malakabe, botsitso ba mocheso, ho tsamaisana ha mocheso wa tshebetso, le thepa ya mechini.

I. Metswako e Sireletsang Mollo oa Motheo

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

Mokhoa:

• Aluminium Hypophosphite (Botsitso ba Thermal > 300°C): E khothalletsa ho thehoa ha char karolong e khutsufalitsoeng mme e lokolla li-radical tsa PO· karolong ea khase ho sitisa liketso tsa ketane ea ho tuka.
• MCA (Mocheso oa ho bola ~300°C): Ho bola ha endothermic ho ntša likhase tse sa sebetseng (NH₃, H₂O), ho fokotsa likhase tse tukang le ho thibela ho rotha ha metsi ho qhibilihang.
• Zinc Borate (Mocheso oa ho bola > 300°C): E ntlafatsa ho thehoa ha char e kang khalase, e fokotsa mosi le khanya e latelang.

Karolelano e Khothaletsoang:
Aluminium Hypophosphite (10-15%) + MCA (5-8%) + Zinc Borate (3-5%).

2. Magnesium Hydroxide e Fetotsoeng ka Holimo + Aluminium Hypophosphite + Organic Phosphinate (mohlala, ADP)

Mokhoa:

• Magnesium Hydroxide e Fetotsoeng (Mocheso oa ho bola ~300°C): Kalafo ea bokaholimo (silane/titanate) e ntlafatsa ho hasana le botsitso ba mocheso ha e ntse e monya mocheso ho isa mochesong o tlase oa thepa.
• Phosphinate ea Organic (mohlala, ADP, Botsitso ba Thermal > 300°C): E thibelang malakabe a khase ka katleho e phahameng, e sebelisanang le litsamaiso tsa phosphorus-nitrogen.

Karolelano e Khothaletsoang:
Magnesium Hydroxide (15-20%) + Aluminium Hypophosphite (8-12%) + ADP (5-8%).

II. Batho ba nang le boikhethelo ba ho sebelisana 'moho

• Nano Clay/Talc (2-3%): E ntlafatsa boleng ba char le thepa ea mechine ha e ntse e fokotsa tekanyo ea FR.
• PTFE (Polytetrafluoroethylene, 0.2-0.5%): Sehlahisoa se thibelang ho rotha marotholi ho thibela marotholi a tukang.
• Phofo ea Silicone (2-4%): E khothalletsa ho thehoa ha char e teteaneng, e eketsa ho lieha ha lelakabe le ho benya ha bokaholimo.

III. Metswako e Lokelang ho Qojoa

• Aluminium Hydroxide: E bola ho 180-200°C (ka tlase ho mocheso oa ts'ebetso ea PBT oa 220-250°C), e leng se lebisang ho senyehang pele ho nako.
• Magnesium Hydroxide e sa fetoloang: E ​​hloka kalafo ea bokaholimo ho thibela ho kopana le ho bola ha mocheso nakong ea ts'ebetso.

IV. Litlhahiso tsa Ntlafatso ea Tshebetso

1. Kalafo ea Bokaholimo: Sebelisa metsoako ea ho kopanya ea silane holim'a magnesium hydroxide le zinc borate ho ntlafatsa ho hasana le ho kopana ha lifahleho.
2. Taolo ea Mocheso oa Ts'ebetso: Netefatsa mocheso oa ho bola ha FR > 250°C ho qoba ho senyeha nakong ea ts'ebetso.
3. Tekanyo ea Thepa ea Mekaniki: Kenya li-nano-fillers (mohlala, SiO₂) kapa li-tougheners (mohlala, POE-g-MAH) ho lefella tahlehelo ea matla.

V. Mohlala o Tloaelehileng oa ho Sebetsa

VI. Liparamente tsa Teko ea Bohlokoa

• Ho Thibela Lelakabe: UL94 V-0 (1.6mm), LOI > 35%.
• Ho Tsitsisa ha Thempereichara: Masalla a TGA > 25% (600°C).
• Litšobotsi tsa Mekaniki: Matla a ho thapolla > 45 MPa, tšusumetso e sa koaheloang > 4 kJ/m².

Ka ho ntlafatsa dikarolelano, sistimi e sebetsang hantle e thibelang malakabe e se nang halogen e ka fihlellwa ha ho ntse ho bolokwa tshebetso ya PBT ka kakaretso.

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