Dabarar bango
Foda roba mai sake dawowa foda ce mai farin foda mai ƙarfi wanda aka sarrafa ta hanyar feshi da busar da latex na musamman. Ana amfani da ita galibi azaman ƙarin abu mai mahimmanci ga "turmi mai gauraya dubu" da sauran ƙarin turmi mai gauraya don kayan gini na injiniyan rufin bango na waje. . Foda latex mai sake dawowa da aka saba amfani da ita copolymer ne na vinyl acetate, wanda foda ne mai farin da zai iya zamewa cikin sauƙi kuma ana iya watsa shi cikin ruwa don samar da emulsion mai ƙarfi tare da aiki iri ɗaya kamar latex na asali. A matsayin kayan ƙari mai mahimmanci a cikin samfuran turmi mai gauraya busasshe, foda latex mai sake rabuwa yana taka muhimmiyar rawa a cikin turmi mai busasshe na siminti. Yana iya inganta ƙarfin haɗin gwiwa da haɗin kai na kayan. Inganta ƙarfin lanƙwasa mai lanƙwasa da ƙarfin lanƙwasa na kayan. Inganta juriyar daskarewa da narke kayan. Inganta juriyar yanayi, juriya, juriyar lalacewa na kayan. Inganta hydrophobicity na kayan kuma rage sha ruwa. Inganta iya aiki da rage raguwar kayan. Zai iya hana fashewa yadda ya kamata. (I) Inganta ƙarfin haɗin gwiwa da haɗin kai
A cikin busassun kayayyakin turmi na siminti, yana da matuƙar muhimmanci a ƙara foda roba mai sake wargajewa. Yana da matuƙar bayyananne don inganta ƙarfin haɗin kai da haɗin kai na kayan. Wannan ya faru ne saboda shigar ƙwayoyin polymer cikin ramuka da capillaries na matrix na siminti, da kuma sakamakon kyakkyawan ƙarfi mai haɗin kai bayan an shaƙa shi da siminti. Saboda kyakkyawan mannewar resin polymer da kansa, yana iya inganta mannewar samfuran turmi na siminti zuwa substrates, musamman haɗa abubuwan haɗin da ba na organic ba kamar siminti zuwa substrates na organic kamar itace, zare, PWC, da PS. Ingantaccen aiki mara kyau yana da tasiri mafi bayyana.
Inganta lanƙwasawa da juriyar tensile
A cikin kwarangwal mai tauri da aka samar bayan an jika turmin siminti, fim ɗin polymer ɗin yana da laushi da tauri, kuma yana aiki kamar haɗin gwiwa mai motsi tsakanin barbashin turmin siminti, wanda zai iya jure wa manyan nauyin lalacewa da rage damuwa. Inganta juriyar lanƙwasa da lanƙwasawa.
Inganta juriyar tasiri
Foda mai latex mai sake dawowa wani resin thermoplastic ne. Fim ɗin mai laushi da aka lulluɓe a saman barbashi na turmi zai iya shaƙar tasirin ƙarfin waje kuma ya huta ba tare da ya karye ba, ta haka yana inganta juriyar turmi.
Inganta hydrophobicity da rage shan ruwa
Ƙara foda mai latex mai sake wargazawa zai iya inganta tsarin turmi na siminti. Polymer ɗinsa yana samar da hanyar sadarwa mara canzawa yayin aikin ruwan siminti, yana rufe murfin da ke cikin gel ɗin siminti, yana toshe shaye-shayen ruwa, yana hana shigar ruwa, kuma yana inganta rashin shiga ruwa.
Inganta juriya da juriyar lalacewa
Ƙara foda roba mai sake wargajewa zai iya ƙara daɗaɗɗen tsari tsakanin barbashi na turmi na siminti da fim ɗin polymer. Haɓaka ƙarfin haɗin kai yana inganta ikon turmi na jure wa matsin lamba, yana rage saurin lalacewa, yana inganta juriyar lalacewa, kuma yana tsawaita rayuwar turmi.
Inganta kwanciyar hankali na daskarewa da narkewa da kuma hana fashewa da kayan aiki yadda ya kamata
Foda mai sake lalacewa, tasirin filastik na resin thermoplastic ɗinsa zai iya shawo kan lalacewar da faɗaɗa zafi da matsewar kayan turmi na siminti ke haifarwa sakamakon canjin yanayin zafi. Shawo kan gazawar turmi mai sauƙi na siminti, kamar babban busasshiyar bushewa da sauƙin fashewa, na iya sa kayan su zama masu sassauƙa, ta haka ne inganta kwanciyar hankali na kayan na dogon lokaci. Duk da haka, akwai wasu matsaloli a cikin tsarin samar da foda mai sake lalacewa a cikin fasahar da ta gabata, wanda ke haifar da cewa ƙwayoyin latex ba su da daidaito kuma sun yi kyau sosai, kuma haɗuwa tana iya faruwa yayin samarwa, jigilar kaya da ajiya. Ta haka ne ke shafar tasirin amfani da shi.
Ana iya cimma wannan tsari ta hanyar hanyoyin fasaha masu zuwa: tsarin samar da foda mai narkewa a baya, an tsara kayan da ke ƙasa bisa ga kashi 72-85% na polymer emulsion; kariya daga colloid 4-9%; wakili mai fitarwa 11-15%; ƙarin aiki 0-5%; wanda aka samar ta hanyar tsari mai zuwa
a, shiri na colloid mai kariya: a cikin kettle na amsawa, ba a haɗa foda mai kariya na adadin batching da ruwa ba kuma a dumama shi don a daidaita shi zuwa manne, sannan a ƙara defoamer, a dumama shi kuma a ajiye shi ɗumi don samar da colloid mai kariya mai haske, don haka danko ya kai 2500as, mai ƙarfi. Abun da ke ciki ya kai 19.5-20.5%.
b. Shiri na warwatsewa: sanya colloid mai kariya da aka shirya a cikin tukunyar shiri, sannan a zuba polymer emulsion na adadin batching, a gauraya daidai gwargwado, sannan a zuba defoamer a zuba ruwa don daidaita danko zuwa 70-200Mas, kuma sinadarin da ke cikinsa ya kai 39%-42%, yana dumama zuwa 50-55°
C, don amfani;
C, busar da feshi ta girgije: buɗe hasumiyar busar da feshi ta girgije, lokacin da zafin shigar abinci a saman hasumiyar busar da gajimare ya kai digiri 140-150 na Celsius, ana isar da watsawar da aka shirya zuwa wurin shiga abinci a saman hasumiyar busar da feshi tare da famfon sukurori. A tashar ciyarwa, ana ƙara ruwan watsawa zuwa ƙananan ɗigogi tare da diamita na microns 10-100 ta cikin faifan atomization mai sauri na centrifugal a tashar ciyarwa. A lokaci guda, ƙananan ɗigogi suna dumama da sauri tare da iska mai zafi, kuma a lokaci guda, ana ƙara wakilin saki a cikin iska mai zafi. , lokacin da aka dumama ƙananan ɗigogi don samar da ɗanko, wakilin saki yana manne da ƙananan ɗigogi a kan lokaci, sannan ruwan da ke cikin ƙananan ɗigogi yana bushewa da sauri ta hanyar iska mai zafi don samar da cakuda mai ƙarfi na gas;
d, sanyaya da rabuwa: kiyaye zafin iskar da ke fitowa daga bututun iskar busar da iskar hasumiyar feshi a zafin 79°C-81°C, kuma ana fitar da cakuda mai ƙarfi da iskar gas cikin sauri daga bututun iska a ƙasan hasumiyar busar da iskar, sannan a shigo da shi cikin babban matatar jaka bayan sanyaya. Ana raba foda a cikin iskar da ke shiga sannan a rarraba fodar da aka raba kuma a tace don samun samfurin foda mai latex da aka sake rabawa. Takamaiman Kayan Aiki Ƙara wani adadin ruwa mai tsabta gwargwadon mai tsabtace reactor, ɗaga zafin zuwa kusan 50°C, kunna tsarin juyawa, ƙara foda mai kariya bisa ga 25% na adadin ruwan da aka ƙara wa reactor, kuma tsarin ƙarawa ya kamata ya kasance a hankali. Ƙara shi don hana foda ya taruwa a cikin ruwa. Kada a ƙara shi a bangon gefe na reactor. Bayan an gama ƙarawa, ƙara defoamer daidai da 1% na jimlar adadin. Ana ba da shawarar amfani da defoamer mai tushen silicone. Rufe ramin ciyarwa kuma a dumama har zuwa kusan 95°C. Idan aka sanyaya na tsawon awa 1, za a samar da ruwan da ke cikin reactor ɗin ya zama manne mai haske, ba tare da fararen barbashi ba, ɗaukar samfur, gwada danko da abun ciki mai ƙarfi, wanda ke buƙatar danko ya kai kimanin 2500as, da abun ciki mai ƙarfi ya kai 19.5~20.5%. Sai a zuba colloid mai kariya da aka shirya a cikin tukunyar haɗawa, sannan a ƙara polymer emulsion gwargwadon iko, a haɗa colloid mai kariya da emulsion daidai gwargwado, sannan a ƙara defoamer daidai gwargwado, wanda ya yi daidai da kusan 0.1% na jimlar adadin, kuma defoamer ɗin ya kamata ku yi amfani da shi da kanku.
Maganin kumfa, sannan a ƙara ruwa don daidaita danko zuwa 70-200pas, da kuma sinadarin da ke cikinsa zuwa 39%-42%. Ƙara zafin zuwa 5055C. Gwajin samfurin, a shirye don amfani.
Ruwan da ke cikin digo-digo zai busar da shi da sauri ta hanyar iska mai zafi, sannan za a fitar da cakuda mai ƙarfi da iskar gas da sauri daga hasumiyar busarwa, ta haka za a kiyaye zafin fitowar iska a ƙasan magudanar iska ta kayan busarwa a 79 ° C -81 ° Co. Ana shiryar da cakuda mai ƙarfi da iskar gas daga kayan busarwa Bayan fita, a ƙara iskar busasshiya da aka cire danshi 5°C don ta huce, sannan a shigar da iskar da ke ɗauke da foda a cikin babban matatar jakar, sannan a raba foda a cikin iskar ta hanyoyi biyu na rabuwar guguwa da rabuwar tacewa. , Ana rarraba foda da aka raba kuma a tace don samun tsibiran foda na latex da za a iya sake rabawa.
A kai kilogiram 1,000 na ruwa mai narkewa tare da abun ciki mai ƙarfi na kashi 42% zuwa hasumiyar busarwa a wani matsin lamba, sannan a ƙara kilogiram 51 na maganin sakin jiki bisa ga hanyar da ke sama a lokaci guda, a busar da shi ta hanyar feshi sannan a raba daskararru da iskar gas, sannan a sami fitar da foda na kilogiram 461 tare da daidaito mai dacewa.
Lokacin Saƙo: Fabrairu-27-2023