Rarraba na Polyethylene
Rarraba na polyethylene
Polyethylene ya kasu kashi uku na polyethylene mai girma (HDPE), ƙananan polyethylene (LDPE) da ƙananan ƙananan polyethylene (LLDPE) bisa ga hanyar polymerization, nauyin kwayoyin halitta da tsarin sarkar.
LDPE
Properties: m, wari, mara guba, maras ban sha'awa surface, Milky farin waxy barbashi, yawa game da 0.920 g / cm3, narkewa batu 130 ℃～145 ℃. Rashin narkewa a cikin ruwa, dan kadan mai narkewa a cikin hydrocarbons, da dai sauransu. Yana iya jure lalacewar yawancin acid da alkalis, yana da ƙarancin sha ruwa, har yanzu yana iya kula da sassauci a ƙananan yanayin zafi, kuma yana da babban rufin lantarki.
Tsarin aikin:
Akwai nau'ikan nau'ikan nau'ikan nau'ikan nau'ikan nau'ikan nau'ikan nau'ikan nau'ikan nau'ikan nau'ikan bututu da hanyar kettle. Domin rage yawan zafin jiki da matsa lamba, tsarin tsarin tubularrally rungumi dabi'ar ƙananan zafin jiki mai haɓaka aiki don ƙaddamar da tsarin polymerization, ana amfani da ethylene mai tsabta mai tsabta a matsayin babban albarkatun kasa, propylene, propane, da dai sauransu ana amfani da su azaman masu daidaitawa. An yi amfani da polymerization a ƙarƙashin yanayin 330 ° C da 150-300MPa. Narkakkar polymer wanda ya fara polymerization a cikin reactor dole ne a sanyaya kuma a raba shi a babban matsa lamba, matsakaicin matsa lamba da ƙananan matsa lamba. Bayan rabuwa, ana aika shi zuwa mashigai na babban matsa lamba (30 MPa), yayin da aka kwantar da iskar gas mai raɗaɗi kuma an raba shi zuwa ƙananan matsa lamba (0.5 MPa) don sake amfani da shi, yayin da narkakken polyethylene. an aika zuwa ga granulator bayan babban matsin lamba da rabuwa mai rauni. Don granulation a cikin ruwa, a lokacin granulation, kamfanoni na iya ƙara abubuwan da suka dace daidai da filayen aikace-aikacen daban-daban, kuma an tattara granules kuma ana jigilar su.
Amfani:
Ana iya amfani da hanyoyin sarrafawa kamar gyare-gyaren allura, gyare-gyaren extrusion, da gyare-gyaren busa. An fi amfani dashi azaman nomaral fim, masana'antu marufi fim, Pharmaceutical da abinci marufi fim, inji sassa, bukatun yau da kullum, kayan gini, waya, na USB rufi, shafi da roba takarda.
LLDPE
Kayayyaki: Saboda tsarin kwayoyin halitta na LLDPE da LDPE a fili sun bambanta, kaddarorin kuma sun bambanta. Idan aka kwatanta da LDPE, LLDPE yana da kyakkyawan juriya na damuwa na muhalli da kuma rufin lantarki, juriya mai girma, juriya mai tasiri da juriya mai huda.
Tsarin aikin:
LLDPE guduro ne yafi samar da cikakken yawa polyethylene kayan aiki, da kuma wakilan samar da matakai ne Innovene tsari da UCC ta Unipol tsari.
Amfani:
Ta hanyar gyare-gyaren allura, extrusion, busa gyare-gyare da sauran hanyoyin gyaran fuska, samar da fina-finai, kayan yau da kullum, bututu, wayoyi da igiyoyi, da dai sauransu.
HDPE
Properties: Natural, Silindrical ko oblate barbashi, m barbashi, barbashi size ya zama 2 mm ~ 5 mm a kowace hanya, babu inji impurities, thermoplastik. Foda farin foda ne, kuma an ƙyale samfurin da ya cancanta ya sami ɗan rawaya launi. Ba shi da narkewa a cikin kaushi na gama-gari a cikin ɗaki, amma yana iya kumbura a cikin aliphatic hydrocarbons, hydrocarbons aromatic hydrocarbons da halogenated hydrocarbons lokacin da aka tuntube shi na dogon lokaci, kuma yana ɗan narkewa a cikin toluene da acetic acid a yanayin zafi sama da 70 ° C. Oxidation yana faruwa lokacin zafi a cikin iska da kuma ƙarƙashin rinjayar hasken rana. Mai jure wa yawancin acid da zaizayar alkali. Yana da ƙarancin sha ruwa, har yanzu yana iya kula da sassauci a ƙananan zafin jiki, kuma yana da babban rufin lantarki.
Tsarin aikin:
Ana ɗaukar matakai biyu na samarwa: hanyar lokacin gas da hanyar slurry.
Amfani:
Yin amfani da gyare-gyaren allura, gyare-gyaren busa, gyare-gyaren extrusion, rotomolding da sauran hanyoyin gyare-gyare don samar da samfurori na fina-finai, kayan yau da kullum da kuma amfani da masana'antu na nau'o'i daban-daban na kwantena mara kyau, bututu, kaset na calending da ƙulla kaset don marufi, igiyoyi, tarun kamun kifi da zaruruwa, Waya da kebul da sauransu.
Rarraba na Polyethylene