Mukugadzira jira re spunbond nonwoven, zvinhu zvakasiyana zvinogona kukanganisa chimiro chechigadzirwa. Kuongorora hukama pakati pezvinhu izvi uye kuita kwechigadzirwa kunogona kubatsira kudzora nemazvo maitiro ekugadzirisa mamiriro uye kuwana yakakwirira-mhando uye yakawanda inoshanda polypropylene spunbond isiri-yakarukwa machira ezvigadzirwa. Pano, isu tichaongorora muchidimbu izvo zvikuru zvinopesvedzera zvinhu pane zvemuviri zvimiro zve spunbond nonwoven machira uye kugovera iwo nemunhu wese.
Melt index uye molecular weight distribution ye polypropylene slices
Iwo makuru emhando zviratidzo zvepolypropylene zvimedu uremu hwemamorekuru, kugovera huremu hwemamorekuru, isotropy, melt index, uye madota. Iyo molecular huremu hwePP machipi anoshandiswa kutenderera ari pakati pe100000 ne250000, asi muitiro wakaratidza kuti rheological zvimiro zvekunyunguduka zviri nani kana molecular huremu hwepolypropylene huchitenderedza 120000, uye iyo yakanyanya kubvumidzwa kutenderera kumhanya yakakwira zvakare. Iyo yakanyunguduka index ndiyo parameter inoratidza rheological properties yekunyunguduka, uye iyo yakanyunguduka index ye polypropylene slices inoshandiswa mu spunbond inowanzova pakati pe 10 ne 50. Mukugadzirisa kutenderera mukati mewebhu, filament inogamuchira chete dhiyabhorosi yekuyerera kwemhepo, uye chiyero chechidimbu chefilament chinogumira ne rheological properties yekunyunguduka. Iyo yakakura iyo molecular uremu, ndiko kuti, iyo idiki iyo melt index, yakanyanya kuyerera, uye idiki dhizaini reshiyo inowanikwa nefilament. Pasi pemamiriro akafanana ekunyunguduka ejection kubva mumhuno, saizi yefayibha yefilament yakawanikwa yakakura zvakare, zvichikonzera kuomarara kweruoko rwemachira e spunbond asina kuruka. Kana iyo yakanyunguduka index yakakwirira, viscosity yekunyunguduka inoderera, iyo rheological properties yakanaka, kushorwa kwekutambanudza kunoderera, uye pasi pemamiriro akafanana ekutambanudza, chiyero chekutambanudza chinowedzera. Sezvo dhigirii rekutarisisa rema macromolecules richiwedzera, kutsemuka kwesimba re spunbond nonwoven jira rinowedzerawo, uye kutsetseka kwemafilaments kunodzikira, zvichikonzera kupfava kweruoko kunzwa kwejira. Pasi pemaitiro akafanana, iyo yakakwira iyo melt index ye polypropylene, iyo idiki kunaka kwayo uye yakakura simba rayo rekutsemuka.
Kugoverwa kwehuremu hwemamorekuru kunowanzoyerwa nereshiyo yehuremu hweavhareji yemamorekuru huremu (Mw) kusvika kunhamba avhareji yehuremu hwemamorekuru (Mn) yepolymer (Mw/Mn), inozivikanwa sehuremu hwekugovera huremu. Iyo diki iyo molecular uremu hwekugovera kukosha, iyo yakanyanya kugadzikana iyo rheological zvimiro zvekunyunguduka, uye zvakanyanya kugadzikana maitiro ekutenderera, ayo anobatsira kuvandudza kutenderera kumhanya. Iyo zvakare ine yakaderera kunyunguduka elasticity uye tensile viscosity, iyo inogona kuderedza kutenderera kushushikana, kuita kuti PP ive nyore kutambanudza uye kuve yakatsetseka, uye kuwana akakwenenzverwa fiber. Uyezve, kufanana kwetiweki kwakanaka, nemaoko akanaka kunzwa uye kufanana.
Spinning tembiricha
Kumisikidzwa kwekutenderera tembiricha kunoenderana nekunyungudika indekisi yezvakagadzirwa uye zvinodikanwa zvezvinhu zvemuviri zvechigadzirwa. Iyo yakakwira iyo melt index yezvakagadzirwa, inokwidza tembiricha yekutenderera, uye zvinopesana. Iyo yekutenderera tembiricha yakanangana neiyo viscosity yekunyungudika, uye tembiricha yakaderera. Iyo viscosity yekunyunguduka yakakwira, zvichiita kuti kutenderera kuome uye kunowanzo gadzira yakatyoka, yakaoma kana yakaoma fiber, iyo inokanganisa kunaka kwechigadzirwa. Nokudaro, kuitira kuderedza viscosity yekunyunguduka uye kuvandudza rheological properties, nzira yekuwedzera tembiricha inowanzogamuchirwa. Iyo tembiricha yekutenderera ine mhedzisiro yakakosha pane chimiro uye zvimiro zvefiber. Iyo yakaderera tembiricha yekutenderera, iyo yakakwirira iyo yakatambanudzwa viscosity yekunyunguduka, iyo yakakura kutambanudza kupikisa, uye zvakanyanya kuoma kutambanudza filament. Kuti uwane mafiibhi ehunyoro hwakafanana, kumhanya kwemhepo inotambanuka inoda kunge yakakwira pane tembiricha yakaderera. Nokudaro, pasi pemamiriro ezvinhu akafanana, kana kupisa kwekutenderera kwakaderera, fiber yakaoma kutambanudza. Iyo faibha ine yakakwira fineness uye yakaderera molecular orientation, iyo inoratidzwa mune spunbond nonwoven machira ane kushoma kuputsa simba, yakakwirira elongation panguva yekuzorora, uye ruoko rwakaoma kunzwa; Kana tembiricha yekutenderera yakakwira, iyo fiber kutambanudza iri nani, iyo fiber fineness idiki, uye ma molecular orientation akakwira. Izvi zvinoratidzwa mukutyoka kwesimba repamusoro, kureba kudiki, uye kunzwa kwakapfava kweruoko rwemachira ane spunbond asina kuruka. Zvisinei, zvakakosha kucherechedza kuti pasi pemamwe mamiriro ekutonhora, kana kupisa kwekutenderera kwakanyanyisa, filament inoguma haizotonhorere zvakakwana munguva pfupi, uye mamwe mafiibhi anogona kuputsika panguva yekutambanudza, iyo inogona kuumba kukanganisa. Mukugadzirwa chaiko, tembiricha yekutenderera inofanirwa kusarudzwa pakati pe220-230 ℃.
Kutonhora kuumba mamiriro
Mwero wekutonhodza wefilament une chekuita kwakakura pahunhu hwe spunbond nonwoven jira panguva yekugadzira. Kana iyo polypropylene yakanyungudutswa inogona kukurumidza uye yakaenzana kutonhodzwa mushure mekubuda muspinneret, iyo crystallization rate inononoka uye crystallinity yakaderera. Iyo inoguma fiber dhizaini isingagadzike disc-yakaita semvura yekristaro chimiro, iyo inogona kusvika yakakura kutambanudza chiyero panguva yekutambanudza. Maonero emaketani emamorekuru ari nani, ayo anogona kuwedzera kuwedzera crystallinity, kuvandudza simba refiber, uye kuderedza kureba kwayo. Izvi zvinoratidzwa mune spunbond nonwoven machira ane yakakwirira kutsemuka simba uye kuderera kureba; Kana yakanyoroveswa zvishoma nezvishoma, iyo inoguma fibers ine yakagadzikana monoclinic crystal chimiro, iyo isingakodzeri kune fiber kutambanudza. Izvi zvinoratidzwa mumachira e spunbond asina kuruka ane simba rakaderera rekutsemuka uye kurebesa kukuru. Naizvozvo, mukuita kuumbwa, kuwedzera kutonhora kwemhepo uye kuderedza tembiricha yekamuri yekutenderera kunowanzo shandiswa kuvandudza simba rekutsemuka uye kuderedza kurebesa kwemachira e spunbond nonwoven. Mukuwedzera, kureba kwekutonhora kwefilament kwakanyatsoenderana nekushanda kwayo. Mukugadzira machira e spunbond asina kuruka, kureba kwekutonhodza kunowanzo sarudzwa pakati pe50-60cm.
Kudhirowa mamiriro
Maonero echeni dzemamorekuru mushinda dzesiririka chinhu chakakosha chinokanganisa kusimba kwekusimba uye kurebesa pakuputika kwetambo imwe chete. Iyo yakakura dhigirii yekutarisa, kusimba kwetambo imwe chete uye kudiki kurebesa panguva yekuzorora. Chiyero chekutarisa chinogona kumiririrwa ne birefringence ye filament, uye iyo yakakura kukosha, yakakwirira dhigirii yekutarisa. Mafibisi ekutanga anoumbwa apo polypropylene yakanyunguduka inobuda muspinneret ine yakaderera crystallinity uye kutaridzika, yakakwirira fiber brittleness, nyore kutsemuka, uye kwakakosha kurebera panguva yekuzorora. Kuti uchinje maitiro emafiber, anofanirwa kutambanudzwa kune akasiyana madhigirii sezvinodiwa asati agadzira dandemutande. Inkugadzirwa kwe spunbond, kusimba kwefayibha kunonyanya kuenderana nehukuru hwemhepo inotonhorera uye kusvetwa kwemhepo. Iyo yakakura kutonhora uye kusveta mhepo vhoriyamu, iyo inokurumidza kukurumidza kutambanudza, uye mafiber achatambanudzwa zvizere. Iyo molecular orientation ichawedzera, hunyoro huchave hwakanakisa, simba rinowedzera, uye kureba panguva yekuzorora kunoderera. Pakutenderera kumhanya kwe4000m/min, polypropylene filament inosvika pakuzara kwayo kukosha kwebirefringence, asi mumhepo inoyerera inotambanudzira nzira yekutenderera muwebhu, kumhanya chaiko kwefilament kunowanzo kunetsa kudarika 3000m/min. Saka, mumamiriro ezvinhu apo zvinoda zvakasimba zvakakwirira, kukurumidza kutambanudza kunogona kuwedzera noushingi. Zvisinei, pasi pemamiriro emhepo inotonhorera nguva dzose, kana mhepo yekusveta yakakura zvikuru uye kutonhora kwefilament kusina kukwana, mafiritsi anowanzoputika panzvimbo yeextrusion yefa, zvichikonzera kukanganisa musoro wejekiseni uye kukanganisa kugadzirwa uye kunaka kwechigadzirwa. Nokudaro, kugadzirisa kwakakodzera kunofanira kuitwa mukugadzirwa chaiko.
Zvimiro zvemuviri zve spunbond nonwoven machira hazvina hukama chete nehupfumi hwefiber, asiwo kune network chimiro chetambo. Iyo fiber yakanyanya kunaka, iyo yakakwirira dhigirii yekusagadzikana mukurongeka kwefiber pakuisa mambure, iyo yakawanda yunifomu mambure, mafiber akawanda aripo pane imwe unit area, idiki iyo longitudinal uye transverse simba reshiyo yemambure, uye yakakura simba rekupwanya. Saka zvinogoneka kuvandudza kufanana kwezvigadzirwa zvemachira eSpunbond zvisina kuruka uye kuwedzera simba rekupwanya nekuwedzera huwandu hwemhepo yekusveta. Zvisinei, kana vhoriyamu yekusveta mhepo yakakura zvikuru, zviri nyore kukonzera kuparara kwewaya, uye kutambanudza kwakanyanyisa. Maonero epolymer anoita kunge akakwana, uye kupenya kwepolymer kwakanyanyisa, izvo zvinoderedza simba rekuita uye kureba panguva yekuzorora, kuwedzera brittleness, uye nekudaro zvinotungamira mukudzikira kwesimba uye kurebesa kwejira risiri rakarukwa. Kubva pane izvi, zvinogona kuonekwa kuti kusimba uye kurebesa kwespunbond nonwoven machira anowedzera uye anoderera nguva nenguva nekuwedzera kwekusvetwa kwemhepo. Mukugadzirwa chaiko, zvinodikanwa kugadzirisa maitiro nenzira kwayo zvinoenderana nezvinodiwa uye mamiriro chaiwo kuitira kuti uwane zvigadzirwa zvemhando yepamusoro.
Hot rolling tembiricha
Iyo fiber webhu inogadzirwa nekutambanudza mafiibha iri munzvimbo yakasununguka uye inofanira kunge ichipisa-yakakungurutswa uye yakasungwa kuti ive jira. Hot rolling bonding inzira iyo mafiber ari muwebhu anonyoroveswa zvishoma uye anonyungudutswa nekupisa anokunguruka ane kumwe kudzvanywa uye tembiricha, uye mafiber anobatanidzwa pamwechete kuita jira. Chinokosha ndechekudzora tembiricha uye kudzvanywa zvakanaka. Basa rekudziya nderokunyorovesa nekunyungudutsa mafiibhi. Chiyero chefiber dzakapfava uye dzakanyunguduka inosarudza zvemuviri zvespunbond machira asina kuruka. Pakutonhora kwakanyanya, chikamu chidiki chete chemafayibha ane huremu hwemamorekuru hwepasi chinopfava nekunyunguduka, uye kune mashoma mashoma akasunganidzwa pamwechete pasi pekumanikidzwa. Fiber dziri padandemutande dzinokwanisa kutsvedza, uye machira asina kurukwa ane simba rakaderera rekutsemuka asi kurebesa kukuru. Chigadzirwa chacho chinonzwa chakapfava asi chinowanzoita fuzzing; Sezvo tembiricha inopisa yekukunguruka ichiwedzera zvishoma nezvishoma, huwandu hwehunyoro hwakanyoroveswa uye hwakanyunguduka hunowedzera, iyo fiber web bond inova yakasimba, mafiibhi haakwanisi kutsvedza, simba rekutsemuka rejira risiri rakarukwa rinowedzera, uye kureba kuchiri kwakakura. Uyezve, nekuda kwehukama hwakasimba pakati pefibers, iyo elongation inowedzera zvishoma; Kana tembiricha ichikwira zvakanyanya, mafiibhi mazhinji ari padanho rekumanikidzwa anonyunguduka, uye mafibers anobva anyunguduka, otanga kuita brittle. Panguva ino, simba rejira risina kuruka rinotanga kuderera, uye kureba kunodererawo zvakanyanya. Ruoko runonzwa rwakaoma zvikuru uye runoputika, uye simba rekubvarura zvakare rakaderera. Pamusoro pezvo, zvigadzirwa zvakasiyana zvine huremu hwakasiyana uye ukobvu, uye tembiricha yekumisikidza yechigayo inopisa inosiyana zvakare. Kune zvigadzirwa zvitete, kune mashoma faibha pane inopisa inokunguruka, uye kushoma kupisa kunodiwa pakupfava nekunyunguduka, saka tembiricha inodiwa inopisa inodzika. Zvichienderana, kune zvigadzirwa zvakakora, iyo inopisa inopisa tembiricha inodiwa yakakwira.
Hot rolling pressure
Mukupisa kutenderedza bonding process, basa reiyo inopisa inotenderedza mill line kumanikidza kubatanidza iyo fiber dandemutande, zvichiita kuti mafiber ari pawebhu apinde kumwe kupisa kwekupisa uye kuita zvizere mhedzisiro yekupisa kwekushisa panguva yekupisa kwekukunguruka, zvichiita kuti tambo dzakapfava uye dzakanyunguduka dzibatanidzwe zvakasimba pamwe chete, zvichiwedzera simba rekunamatira pakati pemafiber, uye kuita kuti zviomerwe nefibers. Kana mutsara unopisa wekutenderera uchidzika zvishoma, iyo fiber compaction density panzvimbo yekumanikidza mufiber web haina kunaka, simba rekubatana kwefiber harina kukwirira, simba rekubata pakati pemafiber harina kunaka, uye fiber dziri nyore kutsvedza. Panguva ino, ruoko rwekunzwa kwejira risina kuruka spunbond rinenge rakapfava, kureba kwekutsemuka kwakakura, uye simba rekutsemuka rinenge rakaderera; Zvakapesana, kana mutsara kudzvinyirirwa kunenge kwakakwirira, inoguma spunbond isiri-yakarukwa jira ane kuoma ruoko kunzwa, yakaderera elongation panguva zororo, asi mukuru kuputsika simba. Zvisineyi, kana mutsara wemutsetse wechigayo chinopisa uchikwira zvakanyanya, iyo polima yakapfava uye yakanyungudutswa panzvimbo inopisa yefiber web inonetsa kuyerera nekupararira, izvo zvinoderedzawo kutsemuka kwejira risiri rakarukwa. Pamusoro pezvo, kugadzika kwekumanikidzwa kwemutsara kunoenderanawo zvakanyanya nehuremu uye ukobvu hwejira risiri rakarukwa. Mukugadzira, kusarudzwa kwakakodzera kunofanirwa kuitwa zvinoenderana nezvinodiwa kuitira kugadzira zvigadzirwa zvinosangana nekuita zvinodiwa.
Muchidimbu, izvo zvemuviri uye zvemagetsi zvimiro zvepolypropylene spunbond jira risiri rakarukwazvigadzirwa hazvitemerwe nechinhu chimwe chete, asi neyakasanganiswa mhedzisiro yezvinhu zvakasiyana. Mukugadzirwa chaiko, maparamendi anonzwisisika anofanirwa kusarudzwa zvichienderana nezvido chaizvo uye mamiriro ekugadzira kuitira kugadzira emhando yepamusoro spunbond isiri-yakarukwa machira zvigadzirwa zvinogona kusangana nezvinodiwa zvakasiyana. Pamusoro pezvo, kusimba kwakamisikidzwa manejimendi emutsara wekugadzira, kunyatso chengetedza michina, uye kuvandudzwa kwemhando uye kugona kwevashandisi zvakare zvinhu zvakakosha mukuvandudza kunaka kwechigadzirwa.
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-29-2024