Kupanga Kosatha kwa Lawi kwa Thermosetting Acrylic Adhesive
Kuti akwaniritse zofunikira za UL94 V0 zoletsa moto pa zomatira za acrylic zomwe zimayikidwa pa thermosetting, poganizira za mawonekedwe a zoletsa moto zomwe zilipo komanso mawonekedwe a makina oyika thermosetting, njira zotsatirazi zokonzedweratu komanso kusanthula kwakukulu zikuperekedwa:
I. Mfundo Zofunikira pa Kupanga Mapangidwe ndi Zofunikira pa Dongosolo la Thermosetting
- Ayenera kufanana ndi kutentha kozizira (nthawi zambiri 120–180°C)
- Zoletsa moto ziyenera kupirira kutentha kwambiri (kupewa kuwonongeka)
- Onetsetsani kuti kufalikira kwa zinthu kukhazikika m'makina olumikizirana kwambiri
- Sungani mphamvu ya makina pambuyo pochira komanso mphamvu yoletsa moto
II. Kapangidwe ka Dongosolo Loletsa Moto Logwirizana
Ntchito Zoletsa Moto & Kugwirizana kwa Thermoset
| Woletsa Moto | Udindo Waukulu | Kugwirizana kwa Thermoset | Kukweza Koyenera |
|---|---|---|---|
| ATH yabwino kwambiri | Main FR: Kutaya madzi m'thupi kudzera mu endothermic, kuchepetsedwa kwa mpweya m'gawo la mpweya | Imafuna kusintha kwa pamwamba (kuletsa kusonkhana) | ≤35% (kukweza kwambiri kumachepetsa kulumikizana) |
| Hypophosphite ya aluminiyamu | Synergist: Char catalyst, radical scavenger (PO·) | Kuchepetsa kutentha >300°C, koyenera kutsukidwa | 8–12% |
| Zinc borate | Chowonjezera cha Char: Chimapanga chotchinga ngati galasi, chimachepetsa utsi | Imagwirizana ndi ATH (Al-BO char) | 5–8% |
| MCA (Melamine cyanurate) | Gas-phase FR: Imatulutsa NH₃, imaletsa kuyaka | Kuchepetsa kutentha 250–300°C (kutentha kotsitsimula <250°C) | 3–5% |
III. Mankhwala Ovomerezeka (Kulemera %)
Malangizo Ogwiritsira Ntchito Zigawo
| Chigawo | Chiŵerengero | Zolemba Zofunikira Zokhudza Kukonza |
|---|---|---|
| Utomoni wa acrylic wa Thermoset | 45–50% | Mtundu wochepa wa kukhuthala (monga epoxy acrylate) kuti muzitha kudzaza zinthu zambiri |
| ATH yosinthidwa pamwamba (D50 <5µm) | 25–30% | Yokonzedwa kale ndi KH-550 silane |
| Hypophosphite ya aluminiyamu | 10–12% | Yosakanizidwa kale ndi ATH, yowonjezedwa m'magulu |
| Zinc borate | 6–8% | Yowonjezeredwa ndi MCA; pewani kuwonongeka kwambiri |
| MCA | 4–5% | Kusakaniza kofulumira pang'ono kwa nthawi yochepa (<250°C) |
| Dispersant (BYK-2152 + PE sera) | 1.5–2% | Zimaonetsetsa kuti zodzaza zonse zifalikira mofanana |
| Wothandizira kulumikizana (KH-550) | 1% | Anachiritsidwa kale pa ATH/hypophosphite |
| Wothandizira kuchiritsa (BPO) | 1–2% | Choyambitsa kutentha kochepa kuti chizigwira ntchito mwachangu |
| Woletsa kukhazikika (Aerosil R202) | 0.5% | Thixotropic yoletsa kusefukira kwa madzi |
IV. Kulamulira Kofunikira kwa Njira
1. Njira Yofalitsira
- Chithandizo chisanachitike: ATH & hypophosphite yoviikidwa mu yankho la 5% KH-550/ethanol (maola awiri, kuyanika kwa 80°C)
- Kusakaniza ndondomeko:
- Resin + dispersant → Kusakaniza kothamanga pang'ono → Onjezani ATH/hypophosphite yosinthidwa → Kufalikira kothamanga kwambiri (2500 rpm, mphindi 20) → Onjezani zinc borate/MCA → Kusakaniza kothamanga pang'ono (pewani kuwonongeka kwa MCA)
- Zipangizo: Chosakaniza cha mapulaneti (chochotsa mpweya m'malo otayira mpweya) kapena mphero ya mipukutu itatu (ya ufa wa ultrafine)
2. Kukonza Kukonza
- Kukonza pang'onopang'ono: 80°C/1h (pre-gel) → 140°C/2h (mutatha kuchiritsa, pewani kuwonongeka kwa MCA)
- Kulamulira kuthamanga kwa mpweya: 0.5–1 MPa kuti madzi asatseke
3. Njira Zogwirira Ntchito Pamodzi
- ATH + Hypophosphite: Amapanga AlPO₄-reinforced char pamene akuchotsa ma radicals (PO·)
- Zinc borate + MCA: Chotchinga cha gasi cholimba (NH₃ dilution + wosanjikiza wagalasi wosungunuka)
V. Njira Zosinthira Magwiridwe Antchito
Mavuto Ofala ndi Mayankho
| Nkhani | Choyambitsa | Yankho |
|---|---|---|
| Kutaya kwa madzi | Kukhuthala kochepa kwa kusungunuka | Wonjezerani MCA kufika pa 5% + hypophosphite kufika pa 12%, kapena onjezerani 0.5% PTFE micropowder |
| Kufooka pambuyo pochira | Kuchuluka kwa ATH | Chepetsani ATH kufika pa 25% + 5% nano-CaCO₃ (kulimbitsa) |
| Kusungirako dothi | thixotropy wosauka | Wonjezerani silika kufika pa 0.8% kapena sinthani ku BYK-410 |
| LOI <28% | Kusakwanira kwa mpweya wa FR | Onjezani phosphorous wofiira wophimbidwa ndi 2% kapena 1% nano-BN |
VI. Ziyeso Zotsimikizira
- UL94 V0: Zitsanzo za 3.2 mm, nthawi yonse ya moto <50 s (palibe kuyatsa kwa thonje)
- LOI ≥30% (malire a chitetezo)
- TGA zotsalira > 25% (800°C, N₂)
- Kulinganiza kwa makina: Mphamvu yokoka >8 MPa, mphamvu yocheka >6 MPa
Mfundo Zofunika Kwambiri
- Amapeza V0 rating pamene akusunga umphumphu wa makina.
- Mayeso ang'onoang'ono (50g) amalimbikitsidwa musanayese.
- Kuti ntchito ikhale yabwino kwambiri, 2–3% ya zinthu zochokera ku DOPO (monga phosphaphenanthrene) zitha kuwonjezeredwa.
Kapangidwe kameneka kamatsimikizira kuti kakutsatira miyezo yokhwima yoletsa moto pamene kakukonza bwino momwe zinthu zikuyendera komanso momwe zimagwiritsidwira ntchito kumapeto.
Nthawi yotumizira: Julayi-01-2025
