Shin Masu Rinjaye Harshen Harshen Fosfour-Nitrogen Suna Iya Cimma Ƙimar V0 a cikin Rubber Silicone?
Lokacin da abokan ciniki suka yi tambaya game da amfani da haɗin hypophosphite aluminium (AHP) ko AHP + MCA kawai don jinkirin harshen wuta na halogen a cikin roba na silicone don cimma ƙimar V0, amsar ita ce e-amma ana buƙatar daidaita sashi bisa ga buƙatun jinkirin harshen. A ƙasa akwai takamaiman shawarwari don yanayi daban-daban:
1. Amfani da Aluminum Hypophosphite (AHP) Kadai
Abubuwan da suka dace: Don buƙatun UL94 V-1/V-2 ko aikace-aikace masu kula da tushen nitrogen (misali, guje wa tasirin kumfa daga MCA wanda zai iya shafar bayyanar).
Tsarin da aka ba da shawarar:
- Base roba: Methyl vinyl silicone roba (VMQ, 100 phr)
- Aluminum hypophosphite (AHP): 20-30 phr
- Babban abun ciki na phosphorus (40%); 20 phr yana ba da ~ 8% abun ciki na phosphorus don ainihin jinkirin harshen wuta.
- Don UL94 V-0, haɓaka zuwa 30 phr (na iya shafar kaddarorin inji).
- Filler mai ƙarfafawa: Silica Fumed (10-15 phr, yana kiyaye ƙarfi)
- Additives: Hydroxyl silicone oil (2 phr, yana haɓaka aiki) + wakili mai warkarwa (peroxide ko tsarin platinum)
Halaye:
- AHP ita kaɗai ta dogara ne akan jinkirin ɗanɗano-lokaci (samuwar char), yana haɓaka ma'anar iskar oxygen (LOI) na roba na silicone amma tare da iyakancewar hayaki.
- Babban sashi (> 25 phr) na iya haɓaka taurin abu; ƙara 3-5 phr zinc borate zai iya inganta ingancin char Layer.
2. Haɗin AHP + MCA
Abubuwan da suka dace: Abubuwan buƙatun UL94 V-0, da nufin ƙarancin ƙarar ƙarawa tare da haɗin kai-lokacin harshen wuta.
Tsarin da aka ba da shawarar:
- Tushen roba: VMQ (100 phr)
- Aluminum hypophosphite (AHP): 12-15 phr
- Yana samar da tushen phosphorus, yana inganta samuwar char.
- MCA: 8-10 phr
- Tushen Nitrogen yana aiki tare da AHP (tasirin PN), yana fitar da iskar gas (misali, NH₃) don murkushe yaduwar harshen wuta.
- Filler mai ƙarfi: Fumed silica (phr 10)
- Additives: Silane coupling agent (1 phr, yana inganta watsawa) + wakili mai warkarwa
Halaye:
- Jimlar adadin kashe wuta: ~ 20-25 phr, mahimmanci ƙasa da AHP kadai.
- MCA yana rage adadin AHP amma yana iya ɗan ɗan shafan gaskiya (nano-MCA an ba da shawarar idan ana buƙatar bayyana gaskiya).
3. Kwatancen Maɓalli na Maɓalli
| Tsarin tsari | Dagewar Harshen Wuta da ake tsammani | Jimlar adadin (phr) | Ribobi & Fursunoni |
|---|---|---|---|
| AHP kadai (20 phr) | Saukewa: UL94V-1 | 20 | Mai sauƙi, ƙananan farashi; V-0 yana buƙatar ≥30 phr, tare da lalacewar aiki. |
| AHP kadai (30 phr) | Saukewa: UL94V-0 | 30 | Babban jinkirin harshen wuta amma ƙara ƙarfi da rage elongation. |
| AHP 15 + MCA 10 | Saukewa: UL94V-0 | 25 | Tasirin haɗin kai, daidaitaccen aiki - an ba da shawarar don gwaji na farko. |
4. Shawarwari na Gwaji
- Gwajin fifiko don AHP + MCA (15+10 phr): Idan V-0 ya samu, a hankali rage AHP (misali, 12+10).
- Tabbatar da AHP kaɗai: Fara a 20 phr, haɓaka ta 5 phr a kowane gwaji don kimanta LOI da UL94, sa ido kan canje-canjen kayan aikin injiniya.
- Bukatar kashe hayaki: Ƙara 3-5 phr zinc borate zuwa abubuwan da ke sama don rage hayaki ba tare da lalata jinkirin harshen wuta ba.
5. Wasu Rufaffen Ammonium Polyphosphate
Muna da wasu abokan ciniki cikin nasarar yin amfani da TF-201G don silicon roba.
Don ƙarin haɓakawa, la'akari da haɗa ƙaramin adadin aluminium hydroxide (10-15 phr) don rage farashin gabaɗaya, kodayake wannan yana ƙara yawan abun ciki mai cikawa.
More inof., pls contact lucy@taifeng-fr.com
Lokacin aikawa: Yuli-25-2025
