Kugadzirwa kweAcrylic Adhesive yeThermosetting
Kuti zvizadzise zvinodiwa zveUL94 V0 zvinodzivirira moto zve thermosetting acrylic adhesives, tichifunga nezvehunhu hwezvinodzivisa moto zviripo uye hunyanzvi hwe thermosetting systems, nzira inotevera yakagadziriswa uye ongororo yakakosha inokurudzirwa:
I. Nheyo dzeKugadzira Magadzirirwo & Zvinodiwa neSisitimu yeThermosetting
- Inofanira kunge iine tembiricha yekupisa (kazhinji 120–180°C)
- Zvinodzora moto zvinofanirwa kutsungirira kugadziriswa kwekupisa kwakanyanya (kudzivirira kuora kukundikana)
- Iva nechokwadi chekuti kupararira kwakasimba muhurongwa hwe crosslink-density hwakanyanya
- Kuenzanisa simba remakanika mushure mekupora uye kushanda zvakanaka kwekunonoka kwemurazvo
II. Dhizaini yeSisitimu Inodzivirira Moto Inobatanidza Murazvo
Mabasa Anodzivisa Murazvo & Kuenderana kweThermoset
| Rinodzivirira Murazvo | Basa Guru | Kuenderana kweThermoset | Zvinokurudzirwa Kurodha |
|---|---|---|---|
| ATH yakanaka kwazvo | Main FR: Kupera mvura mumuviri, kuderedzwa kwegasi | Inoda kugadziriswa kwenzvimbo (anti-agglomeration) | ≤35% (kurodha zvakanyanya kunoderedza kubatana kwe crosslinking) |
| Aruminiyamu hypophosphate | Synergist: Char catalyst, radical scavenger (PO·) | Bvisa tembiricha >300°C, yakakodzera kucheneswa | 8–12% |
| Zinc borate | Char enhancer: Inoita girazi, inoderedza utsi | Inoshanda pamwe chete neATH (Al-BO char) | 5–8% |
| MCA (Melamine cyanurate) | Gas-phase FR: Inoburitsa NH₃, inodzivirira kutsva | Bvisa tembiricha 250–300°C (tembiricha inodziya <250°C) | 3–5% |
III. Kugadzirwa Kunokurudzirwa (Huremu %)
Nhungamiro dzeKugadzirisa Zvikamu
| Chikamu | Chiyero | Zvinyorwa Zvinokosha Zvekugadzirisa |
|---|---|---|
| Thermoset acrylic resin | 45–50% | Rudzi rwekusviba kwakaderera (semuenzaniso, epoxy acrylate) yekuzadza zvakawanda |
| ATH yakagadziridzwa pamusoro (D50 <5µm) | 25–30% | Yakarapwa kare neKH-550 silane |
| Aruminiyamu hypophosphate | 10–12% | Yakasanganiswa kare neATH, yakawedzerwa mumabatch |
| Zinc borate | 6–8% | Yakawedzerwa neMCA; dzivisa kuora kwakanyanya |
| MCA | 4–5% | Kusanganisa kwekukurumidza kunonoka (<250°C) |
| Dispersant (BYK-2152 + PE wax) | 1.5–2% | Inovimbisa kupararira kwakafanana kwekuzadza |
| Mushonga wekubatanidza (KH-550) | 1% | Yakarapwa kare paATH/hypophosphite |
| Mushonga wekurapa (BPO) | 1–2% | Chinosimudzira kupisa kwakanyanya kuti chigadziriswe nekukurumidza |
| Mushonga unodzivirira kupwanya (Aerosil R202) | 0.5% | Thixotropic inodzivirira kusvibiswa kwevhu |
IV. Kudzora Maitiro Akakosha
1. Maitiro Ekupararira
- Kurapa kusati kwaitwa: ATH & hypophosphite zvakanyikwa mu 5% KH-550/ethanol solution (2h, 80°C kuomesa)
- Kutevedzana kwekusanganisa:
- Resin + dispersant → Kusanganisa kwekukurumidza → Wedzera ATH/hypophosphite yakagadziriswa → Kupararira kwekukurumidza (2500 rpm, 20 min) → Wedzera zinc borate/MCA → Kusanganisa kwekukurumidza (kudzivirira kukanganiswa kweMCA)
- Zvishandiso: Muchina wekusanganisa mapuraneti (vacuum degassing) kana muchina wekugadzira marori matatu (weupfu hwakatsetseka)
2. Kugadzirisa Kugadzirisa
- Kupisa kwematanho: 80°C/1h (pre-gel) → 140°C/2h (mushure mekupora, dzivisa kuora kweMCA)
- Kudzora kumanikidzwa: 0.5–1 MPa kudzivirira kugadzika kwefiller
3. Nzira dzeKubatsirana
- ATH + Hypophosphite: Inogadzira AlPO₄-reinforced char uku ichibvisa radicals (PO·)
- Zinc borate + MCA: Chipingamupinyi chegasi chakasimba (NH₃ dilution + girazi rakanyungudutswa)
V. Maitiro Ekugadzirisa Mashandiro
Matambudziko Akajairika & Mhinduro
| Dambudziko | Chikonzero Chikuru | Mhinduro |
|---|---|---|
| Kudonhedza moto | Kunyunguduka kwakaderera | Wedzera MCA kusvika 5% + hypophosphite kusvika 12%, kana kuwedzera 0.5% PTFE micropowder |
| Kuomarara mushure mekupora | Kutakura kwakawandisa kweATH | Deredza ATH kusvika pa25% + 5% nano-CaCO₃ (kusimbisa) |
| Kuchengetera matope | thixotropy isina kunaka | Wedzera silica kusvika 0.8% kana chinja kuita BYK-410 |
| LOI <28% | Kusakwana kwegasi-phase FR | Wedzera 2% phosphorus tsvuku yakaputirwa kana 1% nano-BN |
VI. Zviyero zvekusimbisa
- UL94 V0: 3.2 mm sampuro, nguva yese yemurazvo <50 s (hapana kubatidza donje)
- LOI ≥30% (muganhu wekuchengetedza)
- TGA zvakasara >25% (800°C, N₂)
- Kuenzana kwemuchina: Simba rekudhonza >8 MPa, simba rekuchekerera >6 MPa
Zvinhu Zvinokosha Zvaunofanira Kuziva
- Anowana chiyero cheV0 uku achichengetedza kuvimbika kwemuchina.
- Kuedza zvidiki (50g) kunokurudzirwa usati waisa zvidimbu.
- Kuti pave nekushanda kwepamusoro: 2–3% yeDOPO derivatives (semuenzaniso, phosphaphenanthrene) inogona kuwedzerwa.
Iyi nzira inoita kuti zvienderane nemitemo yakasimba inodzivirira moto uku ichivandudza mashandiro ekugadzirisa uye kushanda kwekupedzisira.
Nguva yekutumira: Chikunguru-01-2025
