1. Dankowar lamba
Lambar danko tana nuna matsakaicin nauyin kwayoyin halitta na guduro kuma shine babban sifa don ƙayyade nau'in guduro. Kaddarorin da amfani da guduro sun bambanta dangane da danko. Yayin da ƙimar polymerization na resin PVC ke ƙaruwa, kayan aikin injiniya kamar ƙarfin ƙarfi, ƙarfin tasiri, ƙarfin karyewa, da elongation a haɓaka haɓaka, yayin da ƙarfin amfanin ƙasa ya ragu. Sakamakon binciken ya nuna cewa yayin da matakin polymerization na kayan aikin sarrafa PVC ya karu, ainihin kaddarorin resin suna inganta, yayin da aikin sarrafawa da halayen rheological suka lalace. Ana iya ganin cewa rarraba nauyin kwayoyin halitta na resin PVC yana da dangantaka ta kusa tare da sarrafa filastik da aikin samfurin.
2. Ƙirar barbashi na ƙazanta (dige baki da rawaya)
Abubuwan da ba su da tsabta suna ɗaya daga cikin mahimman alamomi don kimanta guduro na PVC. Babban abubuwan da ke shafar wannan alamar sune: da farko, ragowar kayan da ke kan bangon rufi na kettle polymerization ba a wanke sosai ba kuma an gurbata da albarkatun kasa da ƙazanta; Abu na biyu, lalacewa ta injina gauraye da ƙazanta da aikin da bai dace ba yana kawo ƙazanta; A cikin tsarin sarrafa filastik, idan akwai ƙarancin ƙazanta da yawa, zai yi mummunan tasiri akan aiki da amfani da samfuran PVC da aka samar. Alal misali, a cikin aiki da kuma tsara bayanan martaba, akwai ƙazanta da yawa da yawa, wanda zai iya haifar da spots bayyana a saman bayanin martaba, don haka rage bayyanar samfurin. Bugu da ƙari, saboda rashin yin filastik na barbashi na ƙazanta ko ƙananan ƙarfi duk da filastik, kayan aikin injiniya na samfurin sun ragu.
3. Rashin ƙarfi (ciki har da ruwa)
Wannan ma'auni yana nuna asarar nauyi na guduro bayan an yi zafi a wani zazzabi. Ƙananan abun ciki na abubuwa masu lalacewa na iya haifar da wutar lantarki mai sauƙi, wanda ba shi da amfani ga ayyukan ciyarwa yayin sarrafawa da gyare-gyare; Idan abun ciki mai canzawa ya yi yawa, resin yana da haɗari ga clumping da rashin ruwa mara kyau, kuma ana samun kumfa cikin sauƙi yayin gyare-gyare da sarrafawa, wanda ke da mummunar tasiri akan ingancin samfur.
4. Bayyanar yawa
Matsakaicin da aka bayyana shine nauyin kowane juzu'in juzu'in foda na guduro na PVC wanda ba a matsa shi da gaske ba. Yana da alaƙa da ilimin halittar ɗan adam, matsakaicin girman barbashi, da girman girman barbashi na guduro. Ƙarƙashin ƙaƙƙarfan ƙima, babban girma, saurin ɗaukar filastik, da sauƙin sarrafawa. A akasin wannan, high matsakaita barbashi size yawa da kuma kananan girma kai ga sha na PVC aiki AIDS. Don samar da samfurori masu wuyar gaske, nauyin nauyin kwayoyin da ake bukata ba shi da yawa, kuma ba a kara yawan masu amfani da filastik ba yayin aiki. Sabili da haka, ana buƙatar porosity na ƙwayoyin guduro don zama ƙasa, amma akwai buƙatu don busassun kwararar guduro, don haka ƙarancin guduro ya fi girma daidai.
5. Filastik sha na guduro
Adadin sha na kayan aikin sarrafa PVC yana nuna ƙimar pores a cikin ɓangarorin guduro, tare da yawan sha mai da babban porosity. Guduro yana ɗaukar robobi da sauri kuma yana da kyakkyawan aikin sarrafawa. Don gyare-gyaren extrusion (irin su bayanan martaba), kodayake buƙatun don porosity resin ba shi da yawa, pores a cikin ƙwayoyin cuta suna da tasiri mai kyau akan ƙari na additives a lokacin aiki, inganta tasirin abubuwan da ke tattare da su.
6. Farar fata
Farin farin yana nuna kamanni da launi na resin, da kuma lalacewar lalacewa ta hanyar rashin kwanciyar hankali na thermal ko tsawan lokacin riƙewa, yana haifar da raguwa mai yawa a cikin farin. Matsayin fari yana da tasiri mai mahimmanci akan juriya na tsufa na bishiyoyi da samfurori.
7. Sauran abun ciki na vinyl chloride
Ragowar VCM yana nufin ɓangaren resin da ba a haɗa shi ba ko narkar da shi a cikin polyethylene monomer, kuma ƙarfin tallansa ya bambanta dangane da nau'in guduro. A cikin ainihin abubuwan da suka rage na VCM, manyan abubuwan sun haɗa da ƙananan zafin jiki na hasumiya mai tsiri, bambance-bambancen matsa lamba mai yawa a cikin hasumiya, da ƙarancin ƙwayar ƙwayar cuta na guduro, duk waɗannan na iya shafar ɓarnar ragowar VCM, wanda shine alama don auna matakin tsafta. guduro. Don samfura na musamman, kamar jakunkuna na marufi na fim mai wuyar gaske don kayan aikin likitanci, ragowar VCM abun ciki na guduro bai kai daidai ba (kasa da 5PPM).
8. Thermal kwanciyar hankali
Idan abun ciki na ruwa a cikin monomer ya yi yawa, zai haifar da acidity, lalata kayan aiki, samar da tsarin polymerization na ƙarfe, kuma a ƙarshe yana rinjayar yanayin yanayin zafi na samfurin. Idan hydrogen chloride ko chlorine kyauta yana cikin monomer, zai yi mummunan tasiri akan halayen polymerization. Hydrogen chloride yana da wuyar samuwa a cikin ruwa, wanda ya rage darajar pH na tsarin polymerization kuma yana rinjayar kwanciyar hankali na tsarin polymerization. Bugu da ƙari, babban abun ciki na acetylene a cikin monomer na samfurin yana rinjayar kwanciyar hankali na thermal na PVC a ƙarƙashin tasirin synergistic na acetaldehyde da baƙin ƙarfe, wanda ke rinjayar aikin sarrafawa na samfurin.
9. Sieve ragowar
Ragowar sieve yana nuna matakin girman girman guduro mara daidaituwa, kuma babban abubuwan da ke haifar da shi shine adadin watsawa a cikin dabarar polymerization da tasirin motsawa. Idan barbashi na guduro sun yi girma sosai ko kuma sun yi kyau sosai, zai shafi darajar guduro kuma suna da tasiri akan sarrafa samfurin na gaba.
10. "Idon Kifi"
“Idon Kifi”, wanda kuma aka sani da matsayin crystal, yana nufin barbashi na guduro masu haske waɗanda ba a sanya su cikin filastik ba a ƙarƙashin yanayin sarrafa thermoplastic na yau da kullun. Tasiri a ainihin samarwa. Babban mahimmancin "idon kifi" shine cewa lokacin da abun ciki na manyan abubuwan tafasa a cikin monomer ya yi girma, yana narkar da polymer a cikin kwayoyin halitta yayin aikin polymerization, yana rage porosity, yana sa barbashi da wuya, kuma ya zama "kifi na wucin gadi". ido” a lokacin sarrafa filastik. Ana rarraba mai ƙaddamarwa ba daidai ba a cikin ɗigon mai na monomer. A cikin tsarin polymerization tare da canja wurin zafi mara daidaituwa, samuwar guduro tare da nauyin kwayoyin marasa daidaituwa, ko ƙazanta na reactor yayin ciyarwa, ragowar guduro, ko mannewa da yawa na kayan reactor duk na iya haifar da "fisheye". Samar da "idon kifi" kai tsaye yana shafar ingancin samfuran PVC, kuma a cikin aiki na gaba, zai shafi kyawawan samfuran samfuran. Har ila yau, zai rage yawan kayan aikin injiniya kamar ƙarfin ƙarfi da haɓaka samfuran, wanda zai iya haifar da lalatawar fina-finai na filastik ko zanen gado, musamman na USB, wanda zai yi tasiri ga kayan aikin su na lantarki. Yana ɗaya daga cikin mahimman alamomi a cikin samar da guduro da sarrafa filastik.
Lokacin aikawa: Juni-12-2024
