Intangiriro kuri PBT

Polybutylene terephthalate (PBT mu magambo ahinnye) ni urukurikirane rwa polyester, ikozwe muri 1.4-pbt butylene glycol na aside terephthalic (PTA) cyangwa acide terephthalic acide (DMT) ikoresheje polycondensation, kandi ikozwe mu mata yera binyuze mu nzira yo kuvanga.Birasobanutse neza, kristaline ya termoplastique polyester resin.Hamwe na PET, bizwi hamwe nka polyester ya thermoplastique, cyangwa polyester yuzuye.

PBT yatunganijwe bwa mbere n’umuhanga w’umudage P. Schlack mu 1942, hanyuma itezwa imbere n’inganda na Celanese Corporation (ubu ni Ticona) hanyuma igurishwa ku izina ry’ubucuruzi Celanex, yatangijwe mu 1970 nka fibre 30% y’ibirahure ikomeza plastike ku izina ry’ubucuruzi X- 917, nyuma ihinduka kuri CELANEX.Eastman yatangije ibicuruzwa bifite kandi bidafite ibirahuri byongera imbaraga, munsi yubucuruzi Tenite (PTMT);muri uwo mwaka, GE nayo yateje imbere ibicuruzwa bisa nubwoko butatu budashyigikiwe, bushimangirwa kandi bwizimya.Nyuma yaho, inganda zizwi cyane ku isi nka BASF, Bayer, GE, Ticona, Toray, Mitsubishi Chemical, Tayiwani Shin Kong Hefei, Changchun Synthetic Resins, na Nanya Plastics zagiye zinjira mu bicuruzwa, kandi ku isi hose hari inganda zirenga 30.

Nkuko PBT ifite ubushyuhe, guhangana nikirere, kurwanya imiti, ibiranga amashanyarazi meza, kwinjiza amazi make, gloss nziza, ikoreshwa cyane mubikoresho bya elegitoronike, ibice byimodoka, imashini, ibikoresho byo murugo, nibindi, nibicuruzwa bya PBT na PPE, PC, POM, PA, nibindi hamwe bizwi nkibintu bitanu byingenzi byububiko rusange.PBT yihuta, uburyo bwiza bwo gutunganya ni uburyo bwo guterwa inshinge, ubundi buryo ni ugusohora, gushushanya, gutwikira, nibindi.

Urwego rusanzwe rusaba

Ibikoresho byo murugo (ibyuma bitunganya ibiryo, ibyuma bisukura ibyuka, ibyuma bikoresha amashanyarazi, ibishishwa byumisha umusatsi, ibikoresho bya kawa, nibindi), ibikoresho byamashanyarazi (guhinduranya, inzu ya moteri, agasanduku ka fuse, urufunguzo rwa mudasobwa, nibindi), inganda zitwara ibinyabiziga (amakaramu yerekana amatara , radiator grille idirishya, imbaho ​​z'umubiri, ibipfukisho by'uruziga, urugi n'ibirahuri, nibindi).

Imiterere yimiti niyumubiri

PBT nimwe mubintu bikomeye byubushakashatsi bwa thermoplastique, ni igice cya kristaline gifite ibikoresho byiza bya chimique, imbaraga za mashini, imiterere yumuriro wamashanyarazi hamwe nubushyuhe bwumuriro.pbt ifite ituze ryiza mubihe bidukikije.pbt ifite intege nke cyane zo kwinjiza amazi.Imbaraga zingana za PBT zidashimangirwa ni MPa 50, naho imbaraga zingana zubwoko bwa fibre yongeyeho ubwoko bwa PBT ni 170 MPa.ibirahuri byinshi bya fibre fibre bizatera ibikoresho gucika.kristu ya PBT irihuta cyane, kandi gukonjesha kutaringaniye bizatera guhindagurika.Kubintu bifite ibirahuri byongeweho ibirahuri, igipimo cyo kugabanuka mubyerekezo cyibikorwa birashobora kugabanuka, kandi igipimo cyo kugabanuka mubyerekezo gihagaritse ntaho gitandukaniye nibintu bisanzwe.Igabanuka ryibikoresho rusange bya PBT riri hagati ya 1.5% na 2.8%.Kugabanuka kw'ibikoresho birimo 30% byongeweho ibirahuri biri hagati ya 0.3% na 1,6%.

Ibiranga uburyo bwo gutera inshinge PBT

Inzira ya polymerisation ya PBT irakuze, igiciro gito kandi cyoroshye kubumba no gutunganya.Imikorere ya PBT idahinduwe ntabwo ari nziza, kandi ikoreshwa ryukuri rya PBT rigomba guhindurwa, muribyo, ibirahuri fibre byongerewe amanota yahinduwe bingana na 70% ya PBT.

1, PBT ifite aho igaragara gushonga, gushonga ya 225 ~ 235 ℃, ni ibikoresho bya kristu, kristu igera kuri 40%.ubwiza bwa PBT gushonga ntabwo bugerwaho nubushyuhe nkubwo guhagarika umutima, kubwibyo, mugihe cyo guterwa inshinge, umuvuduko wo gutera inshinge za PBT ushonga biragaragara.PBT muburyo bwashongeshejwe bwamazi meza, ubukonje buke, icya kabiri nyuma ya nylon, muguhindura byoroshye kugaragara "Ibicuruzwa byakozwe na PBT ni anisotropique, kandi PBT biroroshye kumanuka munsi yubushyuhe bwinshi uhuye namazi.

Imashini itera inshinge

Mugihe uhisemo imashini yo gutera inshinge.Ingingo zikurikira zigomba gusuzumwa.

① Umubare wibikoresho bikoreshwa mubicuruzwa bigomba kugenzurwa kuri 30% kugeza 80% byumubare ntarengwa wateganijwe wo gutera imashini itera inshinge.Ntibikwiye gukoresha imashini nini yo gutera inshinge kugirango itange ibicuruzwa bito.

② igomba gutoranywa hamwe buhoro buhoro ibyiciro bitatu, uburebure bwa diameter ya 15-20, compression ya 2.5 kugeza 3.0.

IsNibyiza gukoresha no kwifungisha nozzle hamwe nubushyuhe bwo kugenzura ubushyuhe.

④Mu gucana flame retardant PBT, ibice bijyanye nimashini ibumba inshinge bigomba kuvurwa hakoreshejwe anti-ruswa.

3 、 Ibishushanyo mbonera

ThicknessUbugari bwibicuruzwa ntibigomba kuba binini cyane, kandi PBT yunvikana kurwego, bityo ahantu hinzibacyuho nkiburyo bwibicuruzwa bigomba guhuzwa na arcs.

②Gushushanya kugabanuka kwa PBT idahinduwe ni nini, kandi ifumbire igomba kugira ahantu runaka hamanuka.

MoldIcyuma gikeneye kuba gifite imyenge isohoka cyangwa ahantu hasohoka.

DiameterUmurambararo w'irembo ugomba kuba munini.Birasabwa gukoresha uruziga ruzenguruka kugirango wongere ihererekanyabubasha.Ubwoko butandukanye bwamarembo burashobora gukoreshwa kandi kwiruka bishyushye nabyo birashobora gukoreshwa.Irembo rya diameter rigomba kuba hagati ya 0.8 na 1.0 * t, aho t nubunini bwigice cya plastiki.Mugihe amarembo yarengewe, hasabwa byibuze diameter ya 0,75mm.

Ifumbire igomba kuba ifite ibikoresho byo kugenzura ubushyuhe.Ubushyuhe ntarengwa bwububiko ntibugomba kurenga 100 ℃.

OrKu byiciro bya flame retardant PBT ibumba, ubuso bwububiko bugomba kuba chrome yashizwemo kugirango birinde ruswa.

Gushiraho ibipimo byimikorere

Kuvura byumye: Ibikoresho bya PBT byoroshye hydrolyz mubushyuhe bwinshi, bityo bigomba gukama mbere yo kubitunganya.Birasabwa gukama mu kirere gishyushye kuri 120 ℃ mu masaha 4, kandi ubuhehere bugomba kuba munsi ya 0.03%.

Ubushyuhe bwo gushonga: 225 ℃ ～ 275 ℃, ubushyuhe busabwa: 250 ℃.

Ubushyuhe bwubushyuhe: 40 ℃ ～ 60 ℃ kubintu bidashyizweho ingufu.Gukonjesha ibishushanyo bigomba kuba bimwe kugirango bigabanye guhindagurika kw'ibice bya plastiki, kandi diameter isabwa y'umuyoboro ukonjesha wa kaburimbo ni 12mm.

Umuvuduko wo gutera inshinge: hagati (muri rusange 50 kugeza 100MPa, ntarengwa kuri 150MPa).

Umuvuduko wo gutera inshinge: Igipimo cyo gutera inshinge PBT yo gukonjesha yihuta, bityo hagomba gukoreshwa igipimo cyihuse cyo gutera inshinge.Igipimo cyihuta cyo gutera inshinge kigomba gukoreshwa (kuko PBT ikomera vuba).

Umuvuduko wihuta hamwe nigitutu cyinyuma: Umuvuduko wumugozi wo kubumba PBT ntugomba kurenza 80r / min, kandi mubisanzwe uri hagati ya 25 na 60r / min.Umuvuduko winyuma muri rusange 10% -15% byumuvuduko watewe.

Icyitonderwa

UseGukoresha ibikoresho bitunganyirizwa Ikigereranyo cyibikoresho bitunganyirizwa hamwe nibikoresho bishya ni 25% kugeza 75%.

UseIkoreshwa ryumubitsi wo kurekura Mubisanzwe, ntamukozi wo kurekura wifashishijwe, kandi umukozi wo kurekura silicone arashobora gukoreshwa nibiba ngombwa.

ProcessingGuhagarika gutunganya Igihe cyo guhagarika PBT kiri muri 30min, kandi ubushyuhe burashobora kugabanuka kugeza kuri 200 ℃ mugihe cyo guhagarika.Mugihe wongeye kubyara nyuma yigihe kirekire cyo guhagarika, ibikoresho biri muri barrale bigomba gusibwa hanyuma ibikoresho bishya bigomba kongerwamo umusaruro usanzwe.

④ Nyuma yo gutunganya ibicuruzwa Mubisanzwe, nta muti usabwa, kandi nibiba ngombwa, kuvura 1 ~ 2h kuri 120 ℃.

PBT idasanzwe

Kuri PBT, yoroshye kubora, yunvikana nigitutu kandi ikeneye kongeramo fibre yikirahure, umugozi udasanzwe wa PBT utanga umuvuduko uhamye kandi ukoresha amavuta abiri kugirango utezimbere kwambara kubintu bifite fibre yibirahure (PBT + GF).