Qaab-dhismeedka Tixraaca Dabaysha Ololka ee aan Halogen-ka lahayn ee PBT

Qaab-dhismeedka Tixraaca Dabaysha Ololka ee aan Halogen-ka lahayn ee PBT

Si loo wanaajiyo qaabaynta dab-damiyaasha aan halogen lahayn ee PBT, waxaa lagama maarmaan ah in la dheellitiro hufnaanta dib-u-celinta ololka, xasilloonida kulaylka, is-waafajinta heerkulka habaynta, iyo sifooyinka farsamada. Hoos waxaa ku yaal istaraatiijiyad isku-dhafan oo la habeeyay oo leh falanqayn muhiim ah:

1. Isku-darka Dabaysha Ololka ee Aasaasiga ah

Ikhtiyaarka 1aad: Aluminium Hypophosphite + MCA (Melamine Cyanurate) + Zinc Borate

Habka:

• Aluminium Hypophosphite (Xasilloonida kulaylka > 300°C): Waxay kor u qaaddaa sameynta daxalka marxaladda la isku daray waxayna sii deysaa xagjirrada PO· marxaladda gaaska si ay u joojiyaan falcelinta silsiladda gubashada.
• MCA (Kala-goysyada ~300°C): Kala-goysyada endothermic-ka ayaa sii daaya gaasaska aan firfircoonayn (NH₃, H₂O), iyagoo khafiifinaya gaasaska ololaya iyo xakamaynta dhibcaha dhalaalaya.
• Zinc Borate (Dhicitaan > 300°C): Waxay xoojisaa sameynta dhalaalka galaaska, waxayna yareysaa qiiqa iyo iftiinka dambe.

Saamiga lagu taliyay:

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

Ikhtiyaarka 2: Magnesium Hydroxide oo dusha sare laga beddelay + Aluminium Hypophosphite + Phosphinate dabiici ah (tusaale ahaan, ADP)

Habka:

• Magnesium Hydroxide oo wax laga beddelay (Dulbur ~ 300°C): Daaweynta dusha sare (silane/titanate) waxay hagaajisaa kala firdhinta iyo xasilloonida kulaylka; qaboojinta endothermic waxay hoos u dhigtaa heerkulka walxaha.
• Fosfinaat dabiici ah (tusaale ahaan, ADP, xasilloonida kulaylka > 300°C): Wax-ka-qabasho ololka wejiga gaaska oo aad waxtar u leh, oo la jaanqaadaya nidaamyada fosfooraska-nitrogen.

Saamiga lagu taliyay:

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

2. Isku-dubaridayaasha Ikhtiyaarka ah

• Dhoobo/Talc (2-3%): Waxay hagaajisaa tayada dhalaalka iyo sifooyinka farsamada iyadoo la yareynayo rarista dab-damiska.
• PTFE (0.2-0.5%): Wakiilka ka hortagga dhibcaha si looga hortago gubashada dhibcaha.
• Budada Silikoon (2-4%): Waxay kor u qaaddaa sameynta qolof cufan, waxayna xoojisaa dib u dhigista ololka iyo dhalaalka dusha sare.

3. Isku-darka la iska ilaalinayo

• Aluminium Hydroxide: Wuxuu ku burburaa heerkul ah 180-200°C (hoos u dhaca heerkulka habaynta PBT ee 220-250°C), taasoo keenta burbur degdeg ah.
• Magnesium Hydroxide oo aan wax laga beddelin: Waxay u baahan tahay daaweyn dusha sare ah si looga hortago isku-darka iyo kala-baxa kulaylka inta lagu jiro farsamaynta.

4. Talooyinka Hagaajinta Waxqabadka

• Daawaynta Dusha Sare: Isticmaal wakiilada isku xidhka silane ee ku jira Mg(OH)₂ iyo zinc borate si aad u xoojiso kala firdhinta iyo isku xidhka wejiga.
• Xakamaynta Heerkulka Habaynta: Hubi heerkulka kala-baxa dabka oo ka hooseeya 250°C si looga fogaado burburka.
• Dheelitirka Hantida Farsamada: Magdhawga khasaaraha xoogga adoo isticmaalaya nano-buuxiyeyaal (tusaale ahaan, SiO₂) ama kuwa adag (tusaale ahaan, POE-g-MAH).

5. Tusaalaha Qaabaynta

6. Tijaabooyinka Muhiimka ah

• Dib-u-celinta Ololka: UL94 V-0 (1.6mm), LOI > 35%.
• Xasiloonida Kulaylka: Hadhaaga TGA > 25% (600°C).
• Sifooyinka Farsamada: Xoogga jiidista > 45 MPa, saameyn la jaray > 4 kJ/m².

Iyada oo la hagaajinayo saamiga, dib-u-hagaajinta ololka aan halogen-ka lahayn ee waxtarka sare leh ayaa la gaari karaa iyadoo la ilaalinayo waxqabadka guud ee PBT.

More info., pls send email to lucy@taifeng-fr.com