Kodi zinthu zapulasitiki ndi ziti?
Zopangira pulasitiki zimagawidwa m'mitundu iwiri ya thermoplastic ndi thermosetting, zotsatirazi ndizofotokozera mwatsatanetsatane, ndikuyembekeza kuthandiza.
1. Thermoplastic
Thermoplastics, yomwe imadziwikanso kuti thermoplastic resins, ndiye gulu lalikulu la mapulasitiki.Amapangidwa ndi zinthu zopangidwa ndi polima zomwe zimatha kuyendana wina ndi mzake posungunuka ndi kutentha ndipo zimatha kuchiritsanso.Zidazi nthawi zambiri zimakhala ndi kulemera kwakukulu kwa maselo ndipo zimakhala ndi mawonekedwe obwerezabwereza.Thermoplastics imatha kukonzedwa ndi jekeseni, extrusion, kuwombera, calendering ndi njira zina kuti apange magawo ndi zinthu zamitundu yosiyanasiyana ndi makulidwe.
(1) Polyethylene (PE) : PE ndi imodzi mwa mapulasitiki omwe amagwiritsidwa ntchito kwambiri, omwe amagwiritsidwa ntchito popanga, mapaipi, ma insulators waya ndi zina.Malinga ndi kapangidwe kake ka maselo ndi kachulukidwe, PE imatha kugawidwa mu polyethylene yapamwamba kwambiri (HDPE), polyethylene yotsika kwambiri (LDPE) ndi polyethylene yotsika kwambiri (LLDPE).
Polypropylene (PP): PP ndi pulasitiki wamba, yomwe imagwiritsidwa ntchito kwambiri m'mitsuko, mabotolo, ndi zida zamankhwala.PP ndi pulasitiki ya semi-crystalline, kotero ndi yolimba komanso yowonekera kuposa PE.
(3) Polyvinyl kolorayidi (PVC) : PVC ndi imodzi mwa apamwamba kwambiri padziko lonse kupanga mapulasitiki, chimagwiritsidwa ntchito pomanga zipangizo, waya insulators, ma CD ndi zipangizo zachipatala ndi zina.PVC imatha kukhala yamitundu ndipo imalimbana ndi mankhwala ambiri.
(4) Polystyrene (PS) : PS amagwiritsidwa ntchito popanga zinthu zopepuka, zowonekera bwino, monga zotengera zakudya ndi mabokosi osungira.PS imagwiritsidwanso ntchito kwambiri popanga thovu, monga thovu la EPS.
Acrylonitrile-butadiene-styrene copolymer (ABS) : ABS ndi pulasitiki yolimba, yosagwira ntchito yomwe imagwiritsidwa ntchito popanga zogwirira ntchito, nyumba zamagetsi, ndi zida zamagalimoto.
(6) Zina: Komanso, pali mitundu ina yambiri ya thermoplastics, monga polyamide (PA), polycarbonate (PC), polyformaldehyde (POM), polytetrafluoroethylene (PTFE) ndi zina zotero.
2, thermosetting pulasitiki
Mapulasitiki a thermosetting ndi gulu lapadera la mapulasitiki, osiyana ndi thermoplastics.Zidazi sizimafewetsa ndikuyenda zikatenthedwa, koma zimachiritsidwa ndi kutentha.Mapulasitiki a thermosetting nthawi zambiri amakhala ndi mphamvu zambiri komanso kuuma ndipo ndi oyenera kugwiritsa ntchito zomwe zimafunikira kulimba komanso mphamvu.
Epoxy resin (EP) : Epoxy resin ndi pulasitiki yolimba ya thermosetting yomwe imagwiritsidwa ntchito kwambiri pomanga, zamagetsi ndi zamagalimoto.Ma epoxy resins amatha kuchitapo kanthu ndi zinthu zina kuti apange zomatira zamphamvu ndi zokutira.
(2) Polyimide (PI) : Polyimide ndi pulasitiki yosagwira kutentha kwambiri yomwe imatha kusunga katundu wake pa kutentha kwakukulu.Amagwiritsidwa ntchito kwambiri m'mafakitale am'mlengalenga, zamagetsi ndi magalimoto kuti apange zinthu zolimbana ndi kutentha kwambiri komanso zokutira.
(3) Zina: Kuphatikiza apo, pali mitundu ina yambiri ya mapulasitiki a thermosetting, monga phenolic resin, furan resin, polyester wosaturated ndi zina zotero.
Nthawi yotumiza: Dec-07-2023