Zvakanaka, ngatitsanangure zvakadzama musimboti wekugadziriswa kwe elastomer kuvandudza kuoma kwespunbond machira asina kuruka. Uyu ndiwo muenzaniso wekuwana kuita kwepamusoro ne "kuwedzera kusimba uye kuderedza kusasimba" kuburikidza nezvinhu zvinoumba.
Core Concepts: Kusimba vs. Brittleness
Kutanga, ngatinzwisise "kuoma." Kuomarara kugona kwechinhu kutora simba uye kuita deformation yepurasitiki kusvika yatyoka pasi pekushushikana. Chinhu chine kusimba kwakanaka chiri zvese chakasimba uye chinoshingirira, chinoda huwandu hwakakura hwebasa kuti chityoke.
Brittle zvinhu (zvakadai senge unmodified polypropylene): Pasi pesimba rekunze, macheni emamorekuru haana nguva yekugadzirisa patsva, kushushikana kunowedzera pakuremara, zvichitungamira kukurumidza kuputsika uye kurebesa kwakadzika pakuzorora.
Zvishandiso zvakaoma: Pasi pesimba rekunze, vanogona kuburitsa uye kuita deformation yepurasitiki, vachipedza huwandu hwakawanda hwesimba mukuita, nekudaro vachiramba kuputsika.
Chinangwa chikuru chekugadzirisa elastomer ndechekushandura semi-crystalline mapolymers sepolypropylene kubva kubrittle fracture maitiro kuenda kuductile fracture maitiro.
Yakadzama Nheyo dzeElastomer Kugadziriswa
Nheyo yacho inogona kunzwisiswa kubva kune ese ari maviri macroscopic uye macroscopic mazinga. Iwo musimboti uri mu elastomer particles anoita senge stress concentration point uye simba rinotora.
1. Microscopic Mechanical Mechanism: Induction uye Kugumiswa kweKupenga, Kusimudzira kweShear Goho.
Uyu ndiwo musimboti wakakoshesesa. Kana jira re spunbond richiiswa pasi pesimba rekunze (sekubvaruka kana kukanganisa), zvinotevera zvinoitika mukati:
a) Stress Concentration uye Crazing Initiation
Elastomers (senge EPDM, POE) kazhinji haawirirane kana kuti anoenderana neiyo polypropylene matrix. Nokudaro, mushure mokusanganiswa, vanogoverwa sediki, rakapararira "chitsuwa" zvimiro mukati mechikamu chinopfuurira chepolypropylene "gungwa".
Sezvo iyo modulus ye elastomer yakadzikira zvakanyanya kupfuura yepolypropylene, kushushikana kukuru kunoitika pakusangana pakati pezvikamu zviviri kana zvichiiswa kune ekunze masimba.
Aya madhiri ekusimbisa anove nzvimbo dzekutanga dzekupenga. Kupenga hakusi kutsemuka, asi kune microporous fiber bundle chimiro perpendicular kune yekushushikana nzira, ichiri yakabatana nechomukati nemapolymer fiber. Kuumbwa kwekupenga kunotora huwandu hwakawanda hwesimba.
b) Crazing Termination uye Shear Band Kuumbwa
Chechipiri chakakosha basa re elastomer particles kumisa kupenga. Kana kupenga kunosangana neanochinjika elastomer particles panguva yekuparadzira kwayo, iyo yakanyanya kushushikana nzvimbo pamuromo wayo inobvongodzwa, ichidzivirira kupenga kubva mukumera kunouraya macroscopic.
Panguva imwe chete, kushushikana kwekushushikana kunokonzerawo kugera kubereka mune polypropylene matrix. Izvi zvinoreva kutsvedza uye kudzoreredzwa kwepolypropylene molecular cheni pasi pekunetseka kweshear, kugadzira mabhendi ekugera; nzira iyi inodawo huwandu hunokosha hwesimba.
c) Synergistic Energy Dissipation Mechanism
Pakupedzisira, simba rinoshandiswa kunze rinoparadzirwa kuburikidza nenzira dzinotevera:
Kugadzira kupenga kwakawanda: kushandiswa kwesimba.
Deformation uye kutsemuka kwe elastomer particles pachavo: simba rekushandisa.
Kuveura kubereka kwematrix: kushandiswa kwesimba.
Interfacial debonding: iyo elastomer zvimedu zvinopepeta kubva kune matrix, kushandiswa kwesimba.
Kuita uku kunowedzera zvakanyanya basa rinodiwa pakuputsika kwezvinhu, macroscopically inoratidzwa sekuvandudza kwakakosha musimba rekuita uye kuramba kubvarura, ukuwo ichiwedzera kurebesa pakuzorora.
2. Phase Structure Changes: Inobata Crystallization Behavior
Kuwedzerwa kwe elastomers hakungoite se "yekuwedzera" yemuviri asiwo kunokanganisa iyo microstructure ye polypropylene.
Kunatsa Spherulites: Elastomer zvimedu zvinogona kuita senge heterogeneous nucleation nzvimbo, kukanganisa kurongeka kwepolypropylene molecular cheni uye kuita kuti iite kristaro kuita yakatsetseka, denser spherulite zvimiro.
Kuvandudza Interface: Nekushandisa macompatibilizers, kubatana kwemukati pakati pe elastomer uye polypropylene matrix inogona kuvandudzwa, kuve nechokwadi chekuti kushushikana kunogona kufambiswa zvinobudirira kubva kumatrix kuenda kune elastomer particles, nekudaro zvinobudirira kufambisa kupenga uye shear banding.
Yakanyanya Zvishandiso muSpunbond Nonwoven Fabric Production
Kushandisa misimboti iri pamusoro pakugadzira machira e spunbond asina kurukwa kune zvinotevera:
Kuwedzerwa Kusimba kweIndividual Fibers:
Munguva yekutenderera, iyo polypropylene inonyunguduka ine elastomers inotambanudzwa kuita fiber. Iyo yakagadziridzwa fiber pachayo inova yakasimba. Pasi pesimba rekunze, mafiibhi haanyanyi kukoromoka uye anogona kuita deformation yakakura yepurasitiki, achitora simba rakawanda.
Kusimbisa uye Kuomesa kweFiber Network Structure:
Munguva inopisa yekusimbisa yekusimbisa, mafibers anobatana painotenderera. Fiber dzine kusimba kuri nani kashoma kuti dzityoke ipapo painokwidibira kana dzichibvaruka.
Masimba ekunze anogona kugovaniswa zvakare zvakanyanya mufiber network. Kana faibha iri pasi pekunetseka kwakanyanya, inogona kuendesa kushushikana kune yakatenderedza fiber kuburikidza ne deformation, kudzivirira kukurumidza kutadza kunokonzerwa nekunetsekana.
Kusvetukira kumberi mukubvarura uye kusaramba kubvongodza:
Kuramba kubvarura: kubvarura inzira yekuparadzira crack. Elastomer particles zvinobudirira kutanga uye kugumisa akawanda ma microcracks, achivadzivirira kubva pakubatana mumitsemuka macroscopic, zvichideredza zvakanyanya nzira yekubvarura.
Puncture kuramba: Puncture musanganiswa wakaoma wekukanganisa uye kubvarura. Zvekuomesera zvakanyanya zvinogona kuita goho uye deformation kana chinhu chekunze chinoboora, chichiputira chinhu chinoboora pachinzvimbo chekuti chibairwe zvakananga.
Mhedziso
Pfupiso: Nheyo yekuchinja kwe elastomer kuvandudza kuoma kwe spunbond nonwovens ndeyekusanganisa yakaoma asi ine brittle polypropylene matrix nerabha yakapfava, yakanyanyisa elastic, ichivaka inoshanda inoshanda yekubvisa simba mukati mechinhu.
Nekukurudzira kupenga, kugumisa kutsemuka, nekusimudzira kubereka kweshear kuburikidza ne microscopic mechanical mechanisms, simba rinoparadza (impact, kubvarura) rinoshandiswa kunze rinoshandurwa kuita basa guru rekugadzirisa, risingaparadzi. Iyi macroscopically inonatsiridza kupikisa kwechinhu, kuramba kubvarura, uye kurebesa panguva yekuzorora, kushandura spunbond nonwoven jira kubva ku "sina kusimba" kuenda kune "rakaoma." Izvi zvakafanana nekuwedzera simbi simbi kusimende, izvo zvisingango wedzera simba asi, zvinotonyanya kukosha, zvinopa kuoma kwakakosha.
Dongguan Liansheng Non woven Technology Co., Ltd.yakavambwa muna Chivabvu 2020. Ibhizimusi rekugadzira jira rakakura risingarukwe rinobatanidza tsvakiridzo nekusimudzira, kugadzira, uye kutengesa. Inogona kuburitsa mavara akasiyana-siyana ePP spunbond machira asiri akarukwa ane hupamhi husingasviki 3.2 metres kubva pa9 gramu kusvika 300 magiramu.
Nguva yekutumira: Nov-16-2025