Polyethylene terephthalate Tsarin sinadarai shine -OCH2-CH2OCOC6H4CO- Sunan Ingilishi: polyethylene terephthalate, wanda aka rage a matsayin PET, babban polymer ne, wanda aka samo shi daga yanayin rashin ruwa na ethylene terephthalate.Ana samun Ethylene terephthalate ta hanyar esterification dauki na terephthalic acid da ethylene glycol.PET farin madara ne ko rawaya mai haske, polymer crystalline sosai tare da santsi da haske.Yana da kyawawan kaddarorin jiki da na injiniya a cikin kewayon zafin jiki mai faɗi.Zazzabi mai amfani na dogon lokaci zai iya kaiwa 120 ° C.Rufin lantarki yana da kyau.Ko da a babban zafin jiki da mita mai yawa, kayan lantarki har yanzu suna da kyau, amma juriyar corona ba ta da kyau.Juriya mai raɗaɗi, juriyar gajiya, juriya, da kwanciyar hankali duk suna da kyau sosai.
amfani
1, yana da kyawawan kayan aikin injiniya, ƙarfin tasiri shine sau 3 ~ 5 na sauran fina-finai, kuma juriya na nadawa yana da kyau.
2, juriya ga mai, kitse, dilute acid, dilute alkali, da mafi yawan kaushi.
3, yana da kyau kwarai high da low zazzabi juriya.Ana iya amfani da na dogon lokaci a cikin kewayon zafin jiki na 120 ℃, da kuma iya jure high zafin jiki na 150 ℃ da low zafin jiki na -70 ℃ a cikin gajeren lokaci amfani, da kuma inji Properties na high da low zafin jiki da kadan sakamako.
4, Gas da ruwa tururi permeability ne low, wato, yana da kyau kwarai gas, ruwa, mai da wari juriya.
5, high nuna gaskiya, na iya toshe ultraviolet haskoki, mai kyau sheki.
6, maras guba, maras ɗanɗano, tsafta mai kyau da aminci, ana iya amfani dashi kai tsaye don marufi abinci.
PET farar madara ne ko rawaya mai haske mai ƙyalƙyali polymer mai santsi da haske.Kyakkyawan juriya mai raɗaɗi, juriya ga gajiya, juriya juriya da kwanciyar hankali, ƙarancin abrasion da tauri mai ƙarfi, tare da mafi girman ƙarfi tsakanin kayan thermoplastic: ingantaccen rufin lantarki, ƙarancin zafin jiki, amma ƙarancin juriya na corona.Zazzabi, juriya na yanayi, kyakkyawan kwanciyar hankali na juriya na sinadarai, ƙarancin ƙarancin ruwa, juriya ga raunin acid da kaushi mai ƙarfi, amma ba a nutsar da shi cikin ruwan zafi da alkali ba.PET guduro yana da babban zafin canjin gilashin, jinkirin saurin crystallization, dogayen gyare-gyaren sake zagayowar, dogon gyare-gyaren sake zagayowar, babban gyare-gyaren gyare-gyare, ƙarancin kwanciyar hankali, rashin ƙarfi na gyare-gyaren crystal, da ƙarancin zafi.Ta hanyar haɓaka wakili na nucleating, wakilin crystallization da ƙarfafa fiber gilashi, PET yana da halaye masu zuwa ban da kaddarorin PBT:
1, zafin zafi na murdiya da zafin amfani da dogon lokaci sune mafi girma tsakanin kayan maƙasudin maƙasudin thermoplastic.
2, saboda tsananin zafinsa, PET ƙarfafa yana nutsewa a cikin wanka mai siyar a 250 ° C na daƙiƙa 10, kuma kusan baya canza launi.Ya dace musamman don shirye-shiryen siyar da kayan lantarki da na lantarki.
3, da lankwasawa ƙarfi ne 200Mpa, da na roba modulus ne 4000Mpa, da creep da gajiya juriya ma da kyau sosai, da surface taurin ne high, da inji Properties ne kama da thermosetting robobi.
4, tun da ethylene glycol da ake amfani da shi wajen samar da PET kusan rabin farashin butylene glycol da ake amfani da shi wajen samarwa, PET resin da ƙarfafa PET sune mafi ƙasƙanci farashin tsakanin robobin injiniya kuma suna da babban farashi.