Imiyoboro y'amashanyarazi idafite insinga ni imiterere y'ingenzi irinda insinga guhangayika no gukurura ibintu byo hanze kandi igatuma imikorere yayo ihora ihagaze neza. Guhitamo ibikoresho bigena neza uburyo insinga zikoresha ...
Impamvu PBT ari yo ikundwa
Polybutylene terephthalate (PBT)ifite modulus isanzwe ya elastic ya 2-3 GPa, iri hejuru kurusha iya PA12 (polyamide 12), ikaba iri hafi 1.2-1.8 GPa. Ibi bivuze ko deformation igabanuka munsi y'umutwaro umwe no guhangana neza no gukandamizwa ku ruhande.
Igipimo cyayo cyo kwaguka k'ubushyuhe buri ku murongo ni hafi (6–10) × 10⁻⁵ /°C, bitanga ubuziranenge bwiza bwo kudahungabana, bifasha kugenzura uburebure burenze bwa fibre no kugabanya ibyago byo kugongana kwa microbe mu gihe cy'ihindagurika ry'ubushyuhe.
Byongeye kandi, ubushobozi bwo gufata amazi mu buryo budahagije, ubushobozi bwo kurwanya imiti ihumanya ikirere neza, n'igiciro gito bituma PBT iba imwe mu bikoresho by'ingenzi byo gukoresha imiyoboro idafite amazi menshi.
Icyitonderwa ni uko PBT ari polimeri ifite imiterere ya semi-crystalline, kandi imiterere yayo ishingiye cyane ku miterere yo gutunganya extrusion. Kugenzura neza inzira ni ingenzi kugira ngo habeho imikorere ihamye.
Ibipimo bitatu by'ingenzi byo kugenzura
Gukomera kw'imikorere y'imiyoboro idafite imiyoboro biterwa no kugenzura neza ibipimo bitatu by'ingenzi, buri kimwe kikagira ingaruka ku mikorere y'insinga mu gihe kirekire:
Igipimo cy'umuvuduko w'amazi ashonga (MFI):
Igaragaza uburyo amazi atembera neza. Kuri PBT yoroshye, igenzurwa kuri 7.0–15.0 g/iminota 10. Igomba kuba ihuye neza n'ibikoresho byo kuyitunganya; bitabaye ibyo, ubwiza bw'imiyoboro bushobora kwangirika.
Kugabanuka:
Imyitwarire yo gushonga k'ubushyuhe igira ingaruka ku gukwirakwira k'uburebure bw'umugozi mu muyoboro, ibyo bigira ingaruka ku gutakaza ubushobozi bwo kugonga no gukora neza mu bushyuhe buke. Ni ikintu cy'ingenzi kugira ngo uburyo bwo kohereza amatara buhamye burusheho guhindagurika.
Ubudahangarwa bwo gusaza mu mazi ashyushye:
Imigozi ya ester mu migozi ya molekile ya PBT ishobora kunyura mu mazi mu gihe cy'ubushyuhe bwinshi n'ubushuhe bwinshi, bigatera kwangirika k'imikorere. Gusaza vuba hakoreshejwe ibizamini by'imiyoboro y'umuvuduko, gusuzuma ubukana bw'umubiri n'uburyo imiterere y'imashini igumana, bikunze gukoreshwa mu gusuzuma uburyo ikora neza igihe kirekire. Iyi ni imwe mu mpamvu zituma PBT ikoreshwa cyane mu nsinga z'amashanyarazi zo munsi y'ubutaka no mu bidukikije bikomeye.
Ibikoresho n'Impinduka mu Bikoresho Bidasanzwe
Si porogaramu zose zikwiriye PBT y’umwimerere. Bitewe n’ibikenewe ku bidukikije, ibikoresho bisimbura ibindi n’ikoranabuhanga ryo kubihindura bikoreshwa nk’inyongera:
PP (Polypropylene):
PP itanga ubushobozi bwo kurwanya hidrolisise neza no koroherwa neza. Ariko, bitewe n'uko ifite polarite nke, guhuza kwayo n'ibinyabutabire byuzuza biterwa na sisitemu runaka zo gukora kandi bigomba gusuzumwa neza.
PA12 (Polyamide 12):
PA12 yakoreshejwe mu miterere ya mbere y’imiyoboro y’amashanyarazi idafite amashanyarazi, ariko kubera ko ikoreshwa mu buryo budakomeye kandi ihendutse, yasimbuwe cyane mu mikoreshereze isanzwe. Ubu ikoreshwa cyane mu mikoreshereze isaba ubushobozi bworoshye bwo kuyikoresha.
Uburyo bwo guhindura:
Uburyo bukunze kugaragara bwo kunoza imikorere yo kurwanya guhindagurika kw'imitsi buturuka ku kuvanga PBT na TPEE (Thermoplastic Polyester Elastomer). Imiterere y'imitsi ikomeye/yoroshye ituma irushaho gukomera, ikuzuza ibisabwa mu guhuza insinga no guhindura inzira.
Byongeye kandi, sisitemu zo kuvanga PET/PBT nazo zirimo gusuzumwa kugira ngo habeho kuringaniza imikorere n'ikiguzi.
Ibisabwa by'ingenzi mu mikorere y'ibikoresho byo kuzuza (Cable Jelly)
Urusobe rw'amazi ruri mu muyoboro ni igikoresho cy'ingenzi cyo kurinda imigozi y'urumuri, kandi imikorere yayo igenzurwa ahanini n'ibi bikurikira:
Thixotropi:
Ikora nk'amazi afite umuvuduko muke iyo ikoze mu buryo bworoshye bwo kuyizuza, hanyuma igahita isubira mu mwanya wayo wa gel iyo idahinduka, igatanga uburyo bwo kuyirinda igihe kirekire no kuyirinda mu buryo bwa mashini.
Ihindagurika rya Hydrogen (Urwego rwo Guteza Hydrogen):
Kwinjira kwa hydrogen mu migozi y'urumuri byongera igabanuka ry'ikwirakwizwa ry'ibintu. Kubwibyo, ibintu byuzuza bigomba kugaragaza umusaruro muto cyane wa hydrogen. Ibicuruzwa byiza cyane bishobora kuba birimo hydrogen scavengers kugira ngo bigabanye ibyago.
Isuku n'uburyo ikoreshwa:
Iki gikoresho kigomba kuba kimwe, kidafite umwanda n'udupira tw'umwuka, kandi gihuye n'ibikomoka kuri fibre n'ibikoresho by'imiyoboro kugira ngo hirindwe kwangirika cyangwa ingaruka zo gukorana.
Kuva ku kugenzura PBT mu buryo bwa crystallization, kugeza ku kunoza ikoranabuhanga ryo guhindura, ndetse no ku kuzuza imikorere y’ibikoresho, buri ntambwe igomba kugenzurwa neza kugira ngo habeho kohereza optique mu buryo burambye kandi habeho ishingiro ryizewe ry’imiyoboro y’itumanaho.
Igihe cyo kohereza: Gicurasi-28-2026