Yayin da lokacin hunturu ke gabatowa, yanayin zafi yana raguwa kuma yana raguwa, kuma wasu matsalolin marufi masu sassaucin ra'ayi na hunturu sun zama sananne sosai, kamar su.NY/PE buhunan buhukumaNY/CPP jakunan mayar da martanimasu wuya da gaggautsa; manne yana da ƙananan matakan farko; da kuma hadadden bayyanar samfurin Matsaloli kamar bambanci.
01 Manne yana da ƙananan maƙallan farko
Tun da yanayin zafi a wurare daban-daban ya yi sanyi.wasu abokan ciniki sun ba da rahoton cewa ƙarfin haɗin gwiwa na farko na manne mai zafin jiki mai zafi UF-818A / UK-5000 ya ragu lokacin yin tsarin PET / AL / RCPP, wanda ke nufin cewa ƙarfin saman Layer ɗin ba shi da kyau, amma ƙarfin Layer na ciki yayi ƙasa sosai. Amma bayan sanya shi a cikin dakin tsufa na minti goma, nan da nan ya sami ƙarfi mai kyau. Abokin ciniki yana amfani da wannan samfurin fiye da rabin shekara kuma yana da kwanciyar hankali sosai, kuma tsarin hada-hadar yanzu bai canza daga asali ba.
Bayan dubawa a kan shafin, an gano cewa tashin hankali na abu ya kasance na al'ada kuma adadin manne da aka yi amfani da shi ya kai 3.7 ~ 3.8g / m2, kuma babu matsaloli. Duk da haka, a lokacin da na'urar iska ta yi karo da fim din, an gano cewa fim din bai ji dumi ba, har ma ya ji sanyi. Duban saitunan ma'auni na naúrar abin nadi mai haɗaka, ƙirar abin nadi zafin jiki shine 50 ° C kuma matsa lamba mai ƙarfi shine 0.3MPa. Bayan daAn ɗaga zafin abin nadi na laminating zuwa 70°C kuma an ɗaga matsa lamba zuwa 0.4Mpa, ƙarfin haɗin gwiwa na farko ya inganta sosai, kuma an kuma inganta bayyanar haɗe-haɗe.
Abokin ciniki ya same shi baƙon abu: an yi amfani da sigogi biyu na laminating nadi zazzabi 50 ℃ da laminating matsa lamba 0.3Mpa, kuma babu irin wannan halin da ake ciki ya faru. Me ya sa muke bukatar mu yi canje-canje yanzu?
Bari mu fara da bincike na m matsa lamba: A lokacin bushe lamination tsari, da composite matsa lamba a kan kowane manufacturer ta aiwatar takardar da bushe lamination inji aka bayyana a mashaya ko MPa, kullum 3bar ko 0.3 ~ 0.6MPa. Wannan ƙimar a zahiri iri ɗaya ce da Matsi na Silinda da aka haɗa da abin nadi na roba. A gaskiya ma, matsa lamba mai haɗawa ya kamata ya zama matsa lamba akan kayan da aka danna tsakanin abin nadi mai mahimmanci da nadi na karfe. Wannan ƙimar matsa lamba yakamata ta zama kgf/m ko kgf/cm, wato, matsa lamba akan tsayin naúrar. Wato F=2K*P*S/L (K shine ma'auni daidai gwargwado, wanda ke da alaƙa da hanyar matsa lamba ta Silinda. Nau'in matsa lamba kai tsaye shine 1, kuma nau'in lever ya fi 1, wanda ke da alaƙa da rabo. na hannun hannu da juriya na P shine matsi na Silinda; Saboda girman Silinda na injuna daban-daban sun bambanta kuma hanyoyin aikace-aikacen matsa lamba sun bambanta, lokacin da ƙimar da aka nuna akan ma'aunin ma'aunin ma'aunin ma'aunin mashin ɗin ya kasance iri ɗaya, ainihin matsi ba dole ba ne.
Bari mu dubi yanayin zafin jiki: A cikin bushewar lamination, bayan manne ya fito daga ramin bushewa, daskararrun ya bushe da gaske, ya bar busasshiyar manne kawai. Wannan shi ne saboda busassun sake amfani da polyurethane adhesive zai rasa danko a dakin da zafin jiki bayan bushewa.Domin su biyun su dace tare da kyau, manne dole ne ya kunna mannewa. Don haka, lokacin laminating, abin nadi na laminating dole ne a mai zafi ta yadda zafin samansa zai iya haifar da danko mai kunnawa.
Bayan shiga watan Nuwamba, yanayin zafi ya ragu sosai a wasu yankuna. A ƙarshen Nuwamba, yawan zafin jiki a wasu wurare ya kasance kusan 10 ° C. Lokacin da abokan ciniki ke haɗa RCPP, ana fitar da albarkatun ƙasa kai tsaye daga sito zuwa wurin samarwa don samarwa. A wannan lokacin, zafin jiki na RCPP yana da ƙasa sosai. Haɗe tare da ƙananan zafin jiki na lamination, fim ɗin yana zafi na ɗan gajeren lokaci yayin lamination, kuma yawan zafin jiki na fim ɗin ya yi ƙasa sosai. Matsakaicin nauyin kwayoyin halitta na mannen dafa abinci mai zafi yana da girma sosai kuma yana buƙatar mai zafi don tada aikin mannen. Idan zafin jiki ya yi ƙasa sosai, ƙarfin haɗin gwiwa na farko zai ragu sosai. Bayan an sanya shi a cikin dakin warkewa, aikin manne yana motsawa kuma ana iya ƙara ƙarfin nan da nan.
Don haka, lokacin da muka ƙara yawan zafin jiki mai haɗuwa da haɗuwa, an warware wannan matsala.
Wata matsalar da za a iya fuskanta idan yanayin fim ɗin ya yi ƙasa sosai, shi ne, saboda bambancin yanayin zafi da ke tsakanin ciki da wajen wajen taron yana da yawa, kuma wurin da ake bugawa yana da ɗanɗano, idan fim ɗin ya buɗe, tururin ruwa yana takure, kuma saman. na fim din zai sami jin dadi, wanda zai shafi bayyanar samfurin bayan tsufa. kuma tsanani yana haifar da manyan hatsarori masu ɓoye. Bugu da ƙari, saboda rashin daidaituwa da ƙananan zafin jiki ke haifarwa lokacin da ake amfani da manne, matsalolin bayyanar da aka haɗa su ma suna faruwa lokaci zuwa lokaci.
Matakan rigakafi:A cikin hunturu, ya kamata a sanya albarkatun kasa da adhesives a cikin aikin samar da sa'o'i 24 a gaba gwargwadon yiwuwa. Abokan ciniki tare da yanayi na iya gina pre-greenhouse. Da kyau ƙara yawan zafin jiki da matsa lamba na abin nadi na lamination don tabbatar da cewa fim din yana "dumi" bayan lamination da winding.
02 Jakar mai mayarwa tana da wuya kuma tana da rauni
Tare da zuwan hunturu, NY/PE buhunan dafaffen jakunkuna da jakunkuna na NY/CPP sun zama masu tauri da tsinke. Matsalolin da aka samu shine yawan karyewar buhu ya karu. Wannan ya zama matsala mai dadewa a duk masana'antar. Manyan Kamfanonin tattara kaya da yawa suma suna cikin damuwa da wannan matsalar kuma suna neman mafita.
NY/CPP jakunkuna masu jure zafin jiki gabaɗaya suna nufin jakunkuna masu haɗaka waɗanda za'a iya haifuwa a 121°C na fiye da mintuna 30. Irin wannan marufi yana da kyau bayyananne, babban ƙarfi, kuma ana amfani dashi sosai. Ana amfani da jakunkuna na NY/PE sau da yawa don tafasa da buhunan buhunan ruwa saboda ƙarfinsu mai kyau da tauri mai kyau.Duk da haka, irin wannan nau'in buhunan marufi tare da olefin kamar yadda murfin rufewa na ciki koyaushe yana fuskantar manyan matsaloli guda biyu: na farko, a cikin tsananin sanyi na sanyi, karyewar jakar yana ƙaruwa, kuma raguwar buhun yana ƙaruwa; na biyu, bayan dafa abinci ko tafasa, jakar ta zama tauri kuma takuwar ta karu .
Gabaɗaya magana, kayan Layer na ciki na jakunkuna masu jujjuya zafin jiki shine RCPP. Babban fa'idar RCPP shine cewa yana da fa'ida mai kyau kuma yana iya jure yanayin zafi sama da 121 ° C. Rashin hasara shi ne cewa yana da wuya kuma ya fi gatse fiye da sauran kayan rufewar zafi. Wannan gaskiya ne musamman a ƙananan yanayin zafi.An raba RCPP zuwa gida da shigo da su. An fahimci cewa samfuran cikin gida sun fi yin homopolymerized, kuma ba shakka wasu kamfanoni suna tsunduma cikin gyaran RCPP. RCPP da aka shigo da shi galibi tushen toshe ne, kuma juriya mai zafi na homopolymer yana da muni fiye da na toshe. Homopolymer RCPP za a cire shi bayan haifuwar zafin jiki mai zafi, wato, RCPP zai zama mai wuya kuma mai karye, yayin da toshe RCPP zai iya kiyaye shi kafin haifuwa. na laushi.
A halin yanzu, Japan ce kan gaba a cikin bincike na duniya a kan polyolefins. Ana kuma fitar da polyolefin na Japan zuwa ko'ina cikin duniya. Taushi da kuma aikin gabaɗaya na fim ɗin NY/PE da fim ɗin RCPP dafa abinci mai zafi yana da kyau sosai.
Saboda haka, ni kaina yi imani da cewa polyolefin kayan taka muhimmiyar rawa a cikin matsalar taurin da brittleness na NY / PE Boiled bags da NY / CPP retort jakunkuna a cikin hunturu. Bugu da ƙari, ban da tasirin abubuwan polyolefin, tawada da mannen manne suma suna da wani tasiri, kuma suna buƙatar haɗin kai don a ƙarshe samar da buhunan dafaffen dafaffen abinci masu inganci da zafin jiki.
Lokacin hunturu yana da tasiri mai yawa akan lamination extrusion, daga cikin abin da daidaitawar iska yana da matukar muhimmanci, kuma kowa ya kamata ya kula da shi.
Lokacin aikawa: Dec-09-2023
