To, bari mu yi bayani dalla-dalla ka'idar gyaran elastomer don inganta taurinspunbond nonwoven yadudduka. Wannan misali ne na yau da kullun na samun babban aiki ta hanyar "ƙaramar ƙarfi da rage rauni" ta hanyar haɗakar abubuwa.
Mahimman Ka'idoji: Tauri vs. Brittleness
Da farko, bari mu fahimci “tauri”. Tauri ƙarfin abu ne don ɗaukar ƙarfi da jurewa nakasar filastik har sai ya karye cikin damuwa. Abun da ke da tauri mai kyau yana da ƙarfi da ƙarfi, yana buƙatar babban adadin aiki don karyewa.
Kayan gaggautsa (irin su polypropylene da ba a canza su ba): Ƙarƙashin ƙarfin waje, sarƙoƙin ƙwayoyin cuta ba su da lokacin da za su sake tsarawa, damuwa yana mai da hankali kan lahani, kai tsaye yana haifar da karyewar sauri da ƙarancin haɓakawa a lokacin hutu.
Abubuwa masu tauri: Ƙarƙashin ƙarfin waje, za su iya ba da kyauta da kuma jurewa nakasar filastik, suna cinye yawan adadin kuzari a cikin tsari, don haka tsayayya da karaya.
Babban manufar gyaran elastomer shine canza nau'ikan polymers na semi-crystalline kamar polypropylene daga halayen karyewa zuwa halayen karyewar ductile.
Cikakken Ka'idodin Gyaran Elastomer
Za'a iya fahimtar ƙa'idar daga duka matakan microscopic da macroscopic. Jigon ya ta'allaka ne a cikin barbashi na elastomer da ke aiki azaman wuraren tattara damuwa da masu ɗaukar makamashi.
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Wannan ita ce ka'ida mafi mahimmanci. Lokacin da masana'anta spunbond ke ƙarƙashin ƙarfin waje (kamar tsagewa ko tasiri), matakai masu zuwa suna faruwa a ciki:
a) Damuwa Matsi da Ƙaddamarwa
Elastomers (kamar EPDM, POE) yawanci ba su dace ba ko kuma wani ɓangare na matrix na polypropylene. Sabili da haka, bayan haɗuwa, ana rarraba su a matsayin ƙananan, tarwatsa tsarin "tsibirin" a cikin ci gaba na "teku" na polypropylene.
Tun da modules na elastomer ya fi ƙasa da na polypropylene, babban ƙarfin damuwa yana faruwa a tsaka-tsakin tsaka-tsakin biyu lokacin da aka yi wa sojojin waje.
Waɗannan wuraren tattara damuwa sun zama wuraren farawa don hauka. Crazing ba fashe ba ne, sai dai tsarin damshin fiber na microporous daidai gwargwado ga alkiblar damuwa, har yanzu ana haɗa su ta ciki ta filayen polymer. Samuwar hauka yana sha mai yawa makamashi.
b) Ƙarshe Ƙarshe da Ƙirƙirar Ƙarshen Ƙarshe
Makullin aiki na biyu na elastomer barbashi shine kawo karshen hauka. Lokacin da mahaukaci ya ci karo da barbashi na elastomer masu sassauƙa yayin yaɗuwar sa, babban filin damuwa a bakinsa yana lumshewa, yana hana mahaukacin haɓakawa zuwa fashewar macroscopic.
A lokaci guda, ƙaddamarwar damuwa kuma yana haifar da samar da ƙarfi a cikin matrix polypropylene. Wannan yana nufin zamewar dangi da sake dawo da sarƙoƙin ƙwayoyin ƙwayoyin cuta na polypropylene a ƙarƙashin damuwa mai ƙarfi, samar da igiyoyi masu ƙarfi; wannan tsari kuma yana buƙatar adadin kuzari mai yawa.
c) Tsarin Rushewar Makamashi na Haɗin kai
Daga qarshe, makamashin da ake amfani da shi a waje yana bazuwa da farko ta hanyoyi masu zuwa:
Samar da yawan hauka: amfani da makamashi.
Nakasawa da karaya na elastomer barbashi da kansu: amfani da makamashi.
Samar da ƙarfi na matrix: amfani da makamashi.
Interface debonding: elastomer barbashi peeling daga matrix, makamashi amfani.
Wannan tsari yana ƙara haɓaka aikin da ake buƙata don karyewar abu, wanda aka bayyana a cikin macroscopically a matsayin babban ci gaba a cikin ƙarfin tasiri da juriya, yayin da kuma yana haɓaka haɓakawa a lokacin hutu.
2. Canje-canje Tsarin Tsarin lokaci: Yana shafar Halayen Crystallization
Bugu da ƙari na elastomers ba kawai yana aiki a matsayin "ƙari" na jiki ba amma kuma yana rinjayar microstructure na polypropylene.
Refining Spherulites: Barbashi na Elastomer na iya aiki azaman rukunin rukunoni daban-daban, suna ɓata tsarin sarƙoƙin ƙwayoyin ƙwayoyin cuta na polypropylene na yau da kullun kuma yana haifar da su zuwa cikin mafi kyawun tsarin spherulite.
Inganta Interface: Ta amfani da compatibilizers, da interfacial adhesion tsakanin elastomer da polypropylene matrix za a iya inganta, tabbatar da cewa danniya za a iya yadda ya kamata canjawa wuri daga matrix zuwa elastomer barbashi, game da shi mafi inganci inducing crazes da shear banding.
Takamaiman Aikace-aikace a cikin Spunbond Nonwoven Fabric Production
Aiwatar da ƙa'idodin da ke sama don samar da yadudduka marasa saƙa na spunbond yana da sakamako masu zuwa:
Ingantattun Taurin Fiber Na Mutum:
A lokacin aikin juyawa, narkewar polypropylene mai ɗauke da elastomers an shimfiɗa shi cikin zaruruwa. Zaburan da aka gyara da kansu sun zama masu tauri. Ƙarƙashin ƙarfi na waje, zaruruwan ba su da saurin karyewa kuma suna iya fuskantar nakasar filastik mai girma, suna ɗaukar ƙarin kuzari.
Ƙarfafawa da Ƙarfafa Tsarin Sadarwar Fiber:
A lokacin ƙarfafa juyi mai zafi, zaruruwan suna haɗawa a wurin mirgina. Zaɓuɓɓukan da ke da tauri mafi kyawu ba su da yuwuwar karyewa nan take a wurin jujjuyawa lokacin da aka yi musu tsaga.
Za a iya sake rarraba sojojin waje yadda ya kamata a cikin hanyar sadarwa ta fiber. Lokacin da fiber ke fuskantar babban damuwa, zai iya canja wurin danniya zuwa filayen da ke kewaye da shi ta hanyar nakasawa, hana saurin gazawar da ke haifar da damuwa.
Tsalle gaba cikin hawaye da juriyar huda:
Juriyar Hawaye: Tsagewa shine tsarin yaduwa. Barbashi na Elastomer suna farawa da ƙare da yawa microcracks, suna hana su haɗakarwa zuwa fashewar macroscopic, suna rage gudu sosai.
Juriyar huda: Huda wani hadadden hade ne na tasiri da tsagewa. Kayayyakin masu tsananin ƙarfi na iya samun fa'ida mai yawa da nakasu lokacin da wani baƙon abu ya huda, yana rufe abin da yake hudawa maimakon huda kai tsaye.
Kammalawa
Takaitawa: Ka'idar gyaran elastomer don haɓaka taurin spunbond nonwovens shine ainihin haɗa matrix polypropylene mai ƙarfi amma gaggautsa tare da taushi, roba mai laushi, yana gina ingantaccen tsarin lalata makamashi a cikin kayan.
Ta hanyar haifar da hauka, ƙare tsagewa, da haɓaka samar da ƙarfi ta hanyar ingantattun ingantattun injiniyoyi, makamashi mai lalacewa (tasiri, tsagewa) da ake amfani da shi a waje yana jujjuya shi zuwa babban adadin kankanin, aikin nakasar da ba mai lalacewa ba. Wannan macroscopically yana haɓaka juriyar tasirin kayan, juriya da tsagewa, da tsayin daka a lokacin hutu, yana canza masana'anta maras saƙa daga “mai rauni” zuwa “tauri.” Wannan yayi kama da ƙara sandunan ƙarfe zuwa siminti, wanda ba kawai yana ƙara ƙarfi ba amma, mafi mahimmanci, yana ba da ƙarfi mai mahimmanci.
Dongguan Liansheng Non saka Technology Co., Ltd.an kafa shi a watan Mayu 2020. Babban kamfani ne wanda ba sa saka masana'anta wanda ke haɗa bincike da haɓakawa, samarwa, da tallace-tallace. Yana iya samar da launuka daban-daban na PP spunbond yadudduka marasa saƙa tare da faɗin ƙasa da mita 3.2 daga gram 9 zuwa 300.
Lokacin aikawa: Nuwamba-16-2025