Polyethylene terephthalate Iyo kemikari formula ndeye -OCH2-CH2OCOC6H4CO- Chirungu zita: polyethylene terephthalate, yakapfupikiswa sePET, imhando yepamusoro yepolymer, inotorwa kubva ku dehydration condensation reaction ye ethylene terephthalate.Ethylene terephthalate inowanikwa ne esterification reaction ye terephthalic acid uye ethylene glycol.PET ichena yemukaka kana yero yakapfava, inonyatso crystalline polima ine nzvimbo yakatsetseka uye inopenya.Iyo ine yakanakisa yemuviri uye yemagetsi zvimiro mune yakakura tembiricha renji.Tembiricha yekushandiswa kwenguva refu inogona kusvika 120°C.Kuiswa kwemagetsi kwakanakisa.Kunyangwe pakupisa kwepamusoro uye kuwanda kwepamusoro, zvimiro zvayo zvemagetsi zvichiri zvakanaka, asi kuramba kwekorona kwakashata.Creep resistance, kuneta kuramba, friction resistance, uye dimensional kugadzikana zvese zvakanaka.
advantage
1, ine yakanaka mechanical zvivakwa, simba rekuita 3 ~ 5 nguva kune mamwe mafirimu, uye kuramba kupeta kwakanaka.
2, inopesana nemafuta, mafuta, dilute acid, dilute alkali, uye yakawanda inonyungudutsa.
3, ine yakanakisa yakakwirira uye yakaderera tembiricha kuramba.Inogona kushandiswa kwenguva yakareba mutembiricha ye120 ℃, uye inogona kumira tembiricha yakakwira ye150 ℃ uye yakaderera tembiricha ye -70 ℃ mukushandiswa kwenguva pfupi, uye michina yemhando yepamusoro uye yakaderera tembiricha haina mhedzisiro.
4, gasi uye mvura mhute permeability yakaderera, kureva, ine yakanakisa gasi, mvura, mafuta uye kunhuwa kuramba.
5, kujeka kwepamusoro, kunogona kuvhara ultraviolet rays, yakanaka gloss.
6, isiri-chepfu, isina kunaka, hutsanana uye kuchengeteka, inogona kushandiswa zvakananga kurongedza chikafu.
PET ichena yemukaka kana yero yakatsvuka zvine crystalline polymer ine nzvimbo yakatsetseka uye inopenya.Yakanaka kukambaira kuramba, kuramba kuneta, kupokana uye kugadzikana kwedimensional, yakaderera abrasion uye kuomarara kwakanyanya, nekuomarara kukuru pakati pezvinhu zvethermoplastic: yakanaka magetsi ekudzivirira, yakaderera tembiricha pesvedzero, asi kushomeka kwekona.Tembiricha, kuramba kwemamiriro ekunze, kugadzikana kwakanaka kwemakemikari kuramba, kunyura kwemvura kuderera, kuramba kune isina simba acids uye organic solvents, asi kwete kunyudzwa mumvura inopisa uye alkali.PET resin ine yakakwira girazi tembiricha tembiricha, inononoka crystallization kumhanya, kureba kuumbwa kutenderera, kureba kuumbwa kutenderera, hombe kuumbwa shrinkage, kushomeka kwemaitiro kugadzikana, brittleness yekuumbwa kwekristaro, uye kushoma kupisa.Kuburikidza nekuvandudzwa kweiyo nucleating agent, crystallization agent uye girazi fiber reinforcement, PET ine zvinotevera maitiro mukuwedzera kune zvivakwa zvePBT:
1, tembiricha yekukanganisa kupisa uye tembiricha yekushandisa kwenguva refu ndiyo yepamusoro pakati pe thermoplastic general-chinangwa zvinhu.
2, nekuda kwekupisa kwayo kwakanyanya, PET yakasimbiswa inonyudzwa mubhati re solder pa 250 ° C kwemasekonzi gumi, uye inenge isingachinji ruvara.Inonyanya kukodzera kugadzirirwa kwekutengesa kwemagetsi uye zvikamu zvemagetsi.
3, simba rekukotama i200Mpa, iyo elastic modulus i4000Mpa, iyo inokambaira uye kuneta kuramba zvakare yakanaka kwazvo, kuoma kwepasi kwakakwira, uye michina yemagetsi yakafanana ne thermosetting mapurasitiki.
4, sezvo ethylene glycol inoshandiswa mukugadzirwa kwePET inenge hafu yemutengo webutylene glycol inoshandiswa mukugadzirwa, PET resin uye yakasimbiswa PET ndiyo mutengo wakaderera pakati peinjiniya mapurasitiki uye ane mutengo wepamusoro.