Uburyo bwo gupima ubushyuhe butagira halogen butuma umuriro ugabanuka

Uburyo bwo gupima ubushyuhe butagira halogen butuma umuriro ugabanuka

Kugira ngo habeho uburyo bwo kunoza ikoreshwa ry’ibidakoresha umuriro bitagira halogen kuri PBT, ni ngombwa kuringaniza imikorere y’ibidakoresha umuriro, ubushyuhe buhamye, uburinganire bw’ubushyuhe n’imiterere ya mekanike. Hasi hari ingamba nziza zo guhuza ibintu hamwe n’isesengura ry’ingenzi:

1. Uruvange rw'ibice bigabanya umuriro

Amahitamo ya 1: Aluminium Hypophosphite + MCA (Melamine Cyanurate) + Zinc Borate

Uburyo:

• Hypophosphite ya Aluminium (Ubushyuhe buhamye > 300°C): Itera imbere kurema kwa char mu gice cyo gufungana kandi ikarekura PO· radicals mu gice cya gaze kugira ngo ihagarike ibikorwa byo gutwika.
• MCA (Isenyuka kuri ~300°C): Isenyuka rya endothermic risohora imyuka idakora (NH₃, H₂O), rigagabanya imyuka ishobora gushya kandi rigahagarika amazi ashongesha.
• Zinc Borate (Ibora > 300°C): Yongera imiterere y'ikirahure, ikagabanya umwotsi n'urumuri ruturutse inyuma.

Igipimo cyatanzwe:

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

Amahitamo ya 2: Magnesium Hydroxide yahinduwe ku buso + Aluminium Hypophosphite + Organic Phosphinate (urugero, ADP)

Uburyo:

• Magnesium Hydroxide yahinduwe (Isenyuka ~ 300°C): Gutunganya ubuso (silane/titanate) binoza ikwirakwira ry'amazi n'ubushyuhe; gukonjesha mu kirere bigabanya ubushyuhe bw'ibikoresho.
• Fosfeneti y’umwimerere (urugero: ADP, ubushyuhe burambye > 300°C): Ikora neza cyane mu gukumira umuriro mu gihe cya gaze, ikorana na sisitemu ya fosfene na azote.

Igipimo cyatanzwe:

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

2. Abahuza b'ibintu badashaka

• Ibumba rito/Talc (2-3%): Itera imbere ubwiza bw'ibumba n'imiterere ya mekanike mu gihe igabanya umuvuduko utuma umuriro udakora neza.
• PTFE (0.2-0.5%): Irinda gutonyanga kugira ngo idatwika ibitonyanga.
• Ifu ya Silicone (2-4%): Itera imbere kurema udukoko twinshi, yongera ubushyuhe bw'umuriro n'ubushyuhe bw'ubuso.

3. Uruvange rwo kwirinda

• Aluminium Hydroxide: Ibora kuri 180-200°C (munsi y'ubushyuhe bwo gutunganya PBT bwa 220-250°C), bigatuma ibora imburagihe.
• Magnesium Hydroxide idahinduwe: Isaba gusukurwa ku buso kugira ngo hirindwe ko ibintu bihinduka no kubora kw'ubushyuhe mu gihe cyo gutunganya.

4. Inama zo kunoza imikorere

• Gutunganya ubuso: Koresha imiti ihuza silane kuri Mg(OH)₂ na zinc borate kugira ngo wongere uburyo bwo gukwirakwiza no guhuza hagati y’urusobe rw’amabara.
• Kugenzura ubushyuhe: Menya neza ko ubushyuhe butuma umuriro ugabanuka bugera kuri dogere selisiyusi 250 kugira ngo wirinde kwangirika.
• Ingano y'Imiterere ya Mekaniki: Kwishyura igabanuka ry'imbaraga hakoreshejwe nano-fillers (urugero, SiO₂) cyangwa tougheners (urugero, POE-g-MAH).

5. Ingero zo gukora

6. Ibipimo by'ingenzi by'ibizamini

• Ingufu z'umuriro: UL94 V-0 (1.6mm), LOI > 35%.
• Ubudahangarwa bw'ubushyuhe: Ibisigazwa bya TGA > 25% (600°C).
• Imiterere ya Mekanike: Ingufu zo gukurura > 45 MPa, ingaruka z'ingufu > 4 kJ/m².

Mu kunoza ibipimo, ubushobozi bwo kugabanya umuriro udafite halogen bushobora kugerwaho mu gihe PBT ikomeza gukora neza muri rusange.

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