Mfundo yaikulu
M'zaka zaposachedwapa, pakhala nkhawa yowonjezereka yokhudza zoopsa zachilengedwe ndi thanzi zomwe zimachitika chifukwa cha zinthu zoletsa moto zopangidwa ndi halogen zomwe zimagwiritsidwa ntchito mu pulasitiki. Chifukwa cha zimenezi, zinthu zoletsa moto zomwe si za halogen zatchuka chifukwa cha makhalidwe awo otetezeka komanso okhazikika.
Zinthu zoletsa moto zopanda halogen zimagwira ntchito poletsa kuyaka komwe kumachitika pamene mapulasitiki ayikidwa pamoto.
1. Amachita izi mwa kusokoneza mpweya woyaka womwe umatulutsidwa panthawi yoyaka. Njira imodzi yodziwika bwino ndi kupanga mpweya woteteza kaboni pamwamba pa pulasitiki.
2. Zikatenthedwa, zinthu zoletsa moto zopanda halogen zimakumana ndi mankhwala, zomwe zimatulutsa madzi kapena mpweya wina wosayaka. Mpweya umenewu umapanga chotchinga pakati pa pulasitiki ndi lawi, motero zimachepetsa kufalikira kwa moto.
3. Zoletsa moto zopanda halogen zimawonongeka ndikupanga gawo lokhazikika la kaboni, lotchedwa char, lomwe limagwira ntchito ngati chotchinga chakuthupi, kuletsa kutulutsa mpweya woyaka.
4. Kuphatikiza apo, zinthu zoletsa moto zopanda halogen zimatha kuchepetsa mpweya woyaka mwa kuika ma ayoni ndikugwira ma free radicals ndi zinthu zina zoyaka moto. Izi zimaphwanya bwino kayendedwe ka kuyaka, zomwe zimachepetsanso mphamvu ya moto.
Ammonium polyphosphate ndi chinthu choletsa moto chomwe chilibe phosphorous-nayitrogeni halogen. Chimagwira ntchito bwino kwambiri poletsa moto m'mapulasitiki ndipo sichimayambitsa poizoni komanso chilengedwe.
Kugwiritsa Ntchito Mapulasitiki
Mapulasitiki oletsa moto monga FR PP, FR PE, FR PA, FR PET, FR PBT ndi zina zotero amagwiritsidwa ntchito kwambiri m'makampani opanga magalimoto pazinthu zamkati mwa magalimoto, monga ma dashboard, mapanelo a zitseko, zida za mipando, malo osungira magetsi, ma treyi a chingwe, mapanelo amagetsi oletsa moto, ma switchgear, malo osungira magetsi, ndi malo onyamula madzi, mapaipi a gasi.
Muyezo woletsa moto (UL94)
UL 94 ndi muyezo woti pulasitiki ipse ndi moto womwe watulutsidwa ndi Underwriters Laboratories (USA). Muyesowu umagawa mapulasitiki molingana ndi momwe amapsereza m'njira zosiyanasiyana komanso makulidwe osiyanasiyana kuyambira omwe amapsereza moto pang'ono mpaka omwe amapsereza moto m'magulu asanu ndi limodzi osiyanasiyana.
| Mlingo wa UL 94 | Tanthauzo la Kuwerengera |
| V-2 | Kuyaka kumasiya mkati mwa masekondi 30 pa gawo lomwe limalola kuti madontho a pulasitiki yoyima yoyaka agwe. |
| V-1 | Kuyaka kumasiya mkati mwa masekondi 30 mbali yoyima yomwe imalola madontho a pulasitiki omwe sakuyaka. |
| V-0 | Kuyaka kumasiya mkati mwa masekondi 10 mbali yoyima yomwe imalola madontho a pulasitiki omwe sakuyaka. |
Fomu Yotumizidwa
| Zinthu Zofunika | Fomula S1 | Fomula S2 |
| Homopolymerization PP (H110MA) | 77.3% | |
| Copolymerization PP (EP300M) | 77.3% | |
| Mafuta Opaka (EBS) | 0.2% | 0.2% |
| Antioxidant (B215) | 0.3% | 0.3% |
| Choletsa kudontha (FA500H) | 0.2% | 0.2% |
| TF-241 | 22-24% | 23-25% |
| Kapangidwe ka makina kotengera 30% yowonjezera ya TF-241. Ndi 30% TF-241 kuti ifike ku UL94 V-0 (1.5mm) | ||
| Chinthu | Fomula S1 | Fomula S2 |
| Chiwopsezo choyaka choyima | V0(1.5mm) | UL94 V-0(1.5mm) |
| Malire a mpweya (%) | 30 | 28 |
| Mphamvu yokoka (MPa) | 28 | 23 |
| Kutalika kwa nthawi yopuma (%) | 53 | 102 |
| Kuchuluka kwa kuyaka pambuyo powiritsa ndi madzi (70℃, 48h) | V0(3.2mm) | V0(3.2mm) |
| V0(1.5mm) | V0(1.5mm) | |
| Modulus yosinthasintha (MPa) | 2315 | 1981 |
| Meltindex(230℃,2.16KG) | 6.5 | 3.2 |
