Layin PP/PE/PA/PETG/EVOH Takardar Shamaki Mai Layi Mai Yawa
Babban Sigar Fasaha
| Tsarin layi | Samfurin Extruder | Faɗin samfura | Kauri na samfura | Tsarin fitarwa na fitarwa |
| 7 yadudduka na haɗin gwiwa | 120/75/50/60/75 | 800-1200mm | 0.2-0.5mm | 500-600kg/sa'a |
| 9 yadudduka na haɗin gwiwa | 75/100/60/65/50/75/75 | 800-1200mm | 0.05-0.5mm | 700-800kg/sa'a |
Lura: Bayanan da aka ƙayyade za a iya canzawa ba tare da sanarwa ba.
Matsayin kasuwa na aikace-aikacen marufi na EVOH
A fannin marufin abinci mai sanyi, mutane suna amfani da kayan ƙarfe ko gilashi a matsayin marufin abinci don ware shigar da sassan iskar gas daban-daban a ciki da waje yadda ya kamata don tabbatar da ingancin abubuwan da ke ciki da ƙimar kayayyaki. Domin akwai manyan abubuwa guda uku da ke haifar da lalacewar abinci: abubuwan halitta (halayen enzyme na halitta, da sauransu), abubuwan sinadarai (galibi oxidation na abubuwan abinci) da abubuwan jiki (hygroscopic, bushewa, da sauransu). Waɗannan abubuwan suna taka rawa a cikin yanayin muhalli kamar iskar oxygen, haske, zafin jiki, danshi, da sauransu, waɗanda ke haifar da lalacewar abinci. Hana lalacewar abinci galibi shine hana yaɗuwar ƙwayoyin cuta a cikin abinci, hana oxidation na abubuwan abinci ta hanyar iskar oxygen, da hana danshi da kuma kiyaye ɗanɗanon abincin na asali.
Ethylene-vinyl alcohol copolymer, wanda aka fi sani da EVOH, an san shi da manyan resin shinge guda uku a duniya tare da polyvinylidene chloride (PVDC) da polyamide (PA) [2]. EVOH na iya hana iskar oxygen shiga cikin abinci sosai, ta haka yana hana samar da gubobi da sauran abubuwa masu cutarwa saboda yaduwar ƙwayoyin cuta, kuma yana iya hana canje-canje a cikin abun da ke ciki wanda iskar shaka ke haifarwa, yayin da yake kiyaye ƙamshi da hana gurɓatar wari na waje. Bugu da ƙari, rashin halayen shingen danshi za a iya rama shi ta hanyar wasu layukan polyolefin. Saboda haka, kayan marufi na EVOH masu layuka da yawa na iya hana lalacewar abinci yadda ya kamata da kuma tsawaita tsawon lokacin shiryawa. Bugu da ƙari, yana da sauƙin sarrafawa da samar da shi, kuma yana da kyakkyawan aikin kare muhalli. Saboda kyawawan halayen shingen iskar gas, bayyananniya, iya sarrafawa da juriyar narkewar resin EVOH, filayen aikace-aikacensa suna ƙara faɗaɗawa, kuma buƙatar kuma tana ƙaruwa da sauri.
Babban resin EVOH mai shinge
1. Abubuwan da ke cikin kayan
Sifofin shinge na EVOH Sifofin shinge na kayan polymer suna nufin ikon kariyar samfura ga ƙananan iskar gas, ruwa, tururin ruwa, da sauransu. Nau'ikan resin da ake amfani da su a yanzu tare da kyawawan halayen shinge sun haɗa da: EVOH, PVDC, PAN, PEN, PA da PET.
2. Idan aka yi amfani da EVOH a matsayin kayan shinge mai tsayi, yawanci yana ɗaukar tsarin haɗakar abubuwa masu yawa. Kayan haɗakar abubuwa da aka fi amfani da su sune: PP, HIPS, PE, EVOH, AD, da AD shine manne a cikin tsarin. Tsarin haɗakar abubuwa masu yawa na iya ba da cikakken wasa ga halayen kowane abu, inganta juriyar ruwa na EVOH, da kuma samun kayan shinge mai tsayi tare da kyawawan halaye masu kyau. Yawancinsu ana amfani da su a cikin marufi mai sassauƙa a baya, amma resins masu haɗakar abubuwa kamar PP, PE, da PA ba su da sauƙin bugawa saboda kyakkyawan tauri da rashin ƙarfi, wanda ke iyakance amfaninsu a fagen marufi mai tsauri, musamman a cikin samfuran cikewa ta yanar gizo. HIPS mai jure wa tasiri yana da kyakkyawan tauri da kyawawan halayen ƙira, wanda ya dace da naushi kuma ya dace da kayan marufi mai tauri. Saboda haka, yana da matuƙar muhimmanci a haɓaka kayan haɗakar abubuwa masu ƙarfi na EVOH waɗanda suka dace da marufi mai tauri.
Saboda rashin daidaito tsakanin resin EVOH da resin HIPS, da kuma babban bambanci a cikin ƙimar resin rheology, ƙarfin haɗin gwiwa tsakanin substrate da EVOH, buƙatun halayen tensile na EVOH yayin ƙera kayan haɗin gwiwa na biyu, da kuma rarrabawar Layer na EVOH yayin kalanda don samar da zanen gado. Daidaiton kayan haɗin gwiwa duk manyan batutuwa ne da ke shafar aiki da amfani da kayan haɗin gwiwa, kuma matsaloli ne masu wahala waɗanda ke buƙatar warwarewa yayin samar da irin wannan kayan haɗin gwiwa.
Mabuɗin fasahar haɗakarwa mai layuka da yawa shine manne (AD). Kayan marufi na EVOH galibi sun haɗa da PPEVOH, amma ba za a iya haɗa PP da EVOH kai tsaye ta hanyar zafi ba, kuma dole ne a ƙara manne (AD) tsakanin PP da EVOH. Lokacin zaɓar manne, ya zama dole a yi la'akari da manne na PP a matsayin kayan tushe, na biyu shine daidaitawar narkewar PP da EVOH, na uku kuma shine buƙatar halayen tauri, don guje wa raguwa yayin sarrafawa na biyu. Saboda haka, zanen da aka haɗa galibi zanen da aka haɗa layuka biyar ne (PPADEVOHADPP). /AD/EVOH/AD/R/PP, layin waje shine sabon kayan PP, sauran layuka biyu kuma kayan da aka sake yin amfani da su ne PP da aka niƙa R(PP). Haka kuma ana iya amfani da tsarin rashin daidaituwa, kuma ana iya ƙara wasu kayan fitarwa (PE/HIPS, da sauransu) don haɗakarwa. Ka'idar iri ɗaya ce, kuma ana iya cimma wannan hanyar haɗakarwa mai layuka da yawa.
Aikace-aikace
Kayan EVOH yana da kyawawan halaye na shinge. Ta hanyar fasahar haɗakarwa tare da PP, PE, PA, PETG da sauran kayayyaki, ana iya sarrafa shi zuwa kayan marufi masu sauƙi masu layuka 5, 7, da 9, galibi ana amfani da su a cikin marufi na aseptic, abubuwan sha na jelly, kayayyakin kiwo, marufi na kifi da nama mai sanyi da sauransu. A ɓangaren da ba abinci ba, ana amfani da shi a cikin marufi na magunguna, marufi na narkewa mai canzawa da sauran fannoni, tare da kyawawan halaye na shinge, wanda ke inganta rayuwar kayayyakin sosai.
