Iphuzu elincibilikayo eliphezulu elincibilikayo likhiqizwa kanjani impahla ye-PP?

Muva nje, izinto zokwakha imaski zithole ukunakwa okukhulu, futhi abasebenzi bethu be-polymer abaphazanyiswanga kule mpi yokulwa nalolu bhubhane. Namuhla sizokwethula ukuthi izinto ze-PP ezincibilikayo zikhiqizwa kanjani.

Isidingo semakethe sephuzu elincibilikayo eliphezulu PP

Ukuncibilika kwe-polypropylene kuhlobene eduze nesisindo sayo samangqamuzana. Isilinganiso sesisindo samangqamuzana esisindo se-polypropylene resin yezohwebo esilungiselelwe isistimu ye-catalytic ye-Ziegler Natta ngokuvamile iphakathi kuka-3 × 105 no-7 × 105. Inkomba yokuncibilika yalezi zinsalela ze-polypropylene ezivamile ngokuvamile iphansi, ekhawulela ububanzi bokusebenza kwazo.

Ngokuthuthuka okusheshayo kwemboni yamakhemikhali yefayibha kanye nemboni yemishini yendwangu, imboni yendwangu engalukiwe ikhule ngokushesha. Uchungechunge lwezinzuzo ze-polypropylene lwenza kube yimpahla eluhlaza ethandwayo yezindwangu ezingalukiwe. Ngokuthuthuka komphakathi, izinkambu zokusetshenziswa kwezindwangu ezingalukiwe zivame ukuba zibanzi: emkhakheni wezokwelapha nempilo,izindwangu ezingalukiweingasetshenziswa ukwenza izingubo zokuzihlukanisa, imaski, izingubo zokuhlinza, ama-napkins ahlanzekile abesifazane, ama-diaper ezingane, njalonjalo; Njengesakhiwo kanye nezinto ze-geotechnical, izindwangu ezingezona ezilukiwe zingasetshenziselwa ukuvimbela amanzi ophahleni, ukwakhiwa komgwaqo, kanye namaphrojekthi okulondoloza amanzi, noma uphahla oluphezulu oluzwakalayo lungakhiqizwa kusetshenziswa ubuchwepheshe be-spunbond nenaliti epunched composite. Impilo yayo yesevisi yinde izikhathi ezi-5-10 kune-asphalt yendabuko ezwakalayo; Izinto zokuhlunga nazo zingomunye wemikhiqizo ethuthuka ngokushesha ezindwangu ezingalukiwe, ezingasetshenziselwa ukuhlunga igesi noketshezi ezimbonini ezinjengamakhemikhali, ezemithi, nokudla, futhi zinamandla amakhulu emakethe; Ngaphezu kwalokho, izindwangu ezingezona ezilukiwe zingasetshenziselwa ukwenziwa kwesikhumba sokwenziwa, izikhwama, izintambo zokugqoka, izindwangu zokuhlobisa, nezindwangu zokusula ekuphileni kwansuku zonke kanye nokusetshenziswa kwasekhaya.

Ngenxa yokuthuthukiswa okuqhubekayo kwezindwangu ezingezona ezilukiwe, izidingo zokukhiqizwa nokusetshenziswa kwazo zikhula njalo, njengokuncibilika okuncibilikisiwe, ukukhiqizwa kwesivinini esikhulu, nemikhiqizo emincane. Ngakho-ke, izidingo zokucubungula ukusebenza kwe-polypropylene resin, impahla eluhlaza eyinhloko yezindwangu ezingezona ezilukiwe, nazo zanda ngendlela efanayo; Ngaphezu kwalokho, ukukhiqizwa kwe-high-speed spinning noma i-fine denier polypropylene fibers nakho kudinga i-polypropylene resin ukuze ibe nezindawo ezinhle zokuncibilika kokuncibilika; Ezinye izingulube ezingakwazi ukumelana namazinga okushisa aphezulu zidinga ukucutshungulwa kwe-polypropylene njengesithwali emazingeni okushisa aphansi kakhulu. Konke lokhu kudinga ukusetshenziswa kwe-ultra-high melt index polypropylene resin njengento eluhlaza engacutshungulwa emazingeni okushisa aphansi.

Impahla ekhethekile yezindwangu ezincibilikisiwe yi-polypropylene ephezulu ye-melt index. Inkomba yokuncibilika isho inqwaba yezinto ezincibilikisiwe ezidlula ku-die capillary ejwayelekile njalo ngemizuzu eyi-10. Uma likhulu inani, kungcono ukucutshungulwa kwe-fluidity yezinto. Uma iphezulu inkomba yokuncibilika kwe-polypropylene, kulapho imicu iphephetha kahle, futhi kuba ngcono nokusebenza kokuhlunga kwendwangu ekhiqiziwe encibilikayo.

Indlela yokulungiselela inkomba ephezulu yokuncibilika kwe-polypropylene resin

Enye iwukulawula isisindo samangqamuzana nokusatshalaliswa kwesisindo samangqamuzana e-polypropylene ngokulawula inqubo yokusabela kwe-polymerization, njengokusebenzisa izindlela zokwandisa ukugcwala kwezivimbela ezifana ne-hydrogen ukuze kwehliswe isisindo samangqamuzana e-polymer, ngaleyo ndlela kwandise inkomba yokuncibilika. Le ndlela inqunyelwe izici ezifana nesistimu ye-catalytic kanye nezimo zokusabela, okwenza kube nzima ukulawula ukuzinza kwenkomba yokuncibilika nokusebenzisa.

I-Yanshan Petrochemical ibilokhu isebenzisa ama-metallocene catalysts ukwenza i-polymerization eqondile yezinto ezincibilikayo ezinenkomba yokuncibilika engaphezu kuka-1000 eminyakeni embalwa edlule. Ngenxa yobunzima bokulawula ukuzinza, i-polymerization enkulu ayizange yenziwe. Selokhu kwaqubuka lolu bhubhane kulo nyaka, i-Yanshan Petrochemical yamukele ubuchwepheshe obulawuleka bokucekelwa phansi kwe-polypropylene melt blown material obuthuthukiswe ngo-2010 ukuze kukhiqizwe i-polypropylene ephephethwa ngendwangu engalukiwe into ekhethekile ngoFebhuwari 12. Ngesikhathi esifanayo, ukuhlolwa kwezimboni kwenziwa kudivayisi kusetshenziswa ama-catalysts e-metallocene. Umkhiqizo ukhiqiziwe futhi okwamanje uthunyelwa kubasebenzisi abazansi nomfula ukuze bahlolwe.

Enye indlela yokulawula ukuwohloka kwe-polypropylene etholakala ngokusebenzisa i-polymerization evamile, ukunciphisa isisindo sayo samangqamuzana nokwandisa inkomba yayo yokuncibilika.

Esikhathini esidlule, izindlela zokuwohloka kwezinga lokushisa eliphezulu zazivame ukusetshenziselwa ukunciphisa isisindo samangqamuzana e-polypropylene, kodwa le ndlela yokuwohloka kwemishini yokushisa ephezulu inezithiyo eziningi, njengokulahlekelwa izithasiselo, ukubola kokushisa, nezinqubo ezingazinzile. Ngaphezu kwalokho, kunezindlela ezifana nokuchithwa kwe-ultrasonic, kodwa lezi zindlela zivame ukudinga ukuba khona kwe-solvents, okwandisa ubunzima nezindleko zenqubo. Eminyakeni yamuva, indlela yokuwohloka kwamakhemikhali e-polypropylene kancane kancane isetshenziswe kabanzi.

Ukukhiqizwa kwe-high melt index PP ngendlela yokuwohloka kwamakhemikhali

Indlela yokuwohloka kwamakhemikhali ihlanganisa ukusabela kwe-polypropylene ngama-ejenti onakalisayo amakhemikhali afana ne-organic peroxides ku-screw extruder, okubangela ukuba amaketanga e-molecular polypropylene aphuke futhi ehlise isisindo samangqamuzana awo. Uma kuqhathaniswa nezinye izindlela zokuwohloka, inezinzuzo zokuwohloka ngokuphelele, ukugeleza okuhle kokuncibilika, kanye nenqubo yokulungiselela elula nenokwenzeka, okwenza kube lula ukwenza ukukhiqizwa kwezimboni ezinkulu. Lena futhi indlela evame ukusetshenziswa kakhulu ngabakhiqizi bepulasitiki abashintshiwe.

Izidingo zezisetshenziswa

Iphuzu elincibilikayo eliphakeme libhekisela kumishini ehluke ngokuphelele kumishini evamile yokuguqula i-PP. Izinto ezisetshenziselwa ukufafaza izinto ezincibilikisiwe zidinga ukulinganisa okude kanye nekhanda lomshini elime mpo, noma zisebenzisa i-granulation engaphansi kwamanzi (i-Wuxi Huachen inokusikwa okufanayo ngaphansi kwamanzi); Izinto ezibonakalayo zincane kakhulu futhi zidinga ukuthintana namanzi ngokushesha ngemva kokuphuma ekhanda lomshini ukuze kuphole kalula;

Ukukhiqizwa kwe-polypropylene evamile kudinga isivinini sokusika i-extruder esingamamitha angu-70 ngomzuzu, kuyilapho i-polypropylene ephezulu yokuncibilika idinga isivinini sokusika esingaphezu kwamamitha angu-120 ngomzuzu. Ukwengeza, ngenxa yezinga lokugeleza elisheshayo le-polypropylene ephezulu yokuncibilika, ibanga layo lokupholisa lidinga futhi lenyuswe lisuka kumamitha angu-4 liye kumamitha ayi-12.

Umshini wokwenza izinto ezincibilikayo ezincibilikayo udinga ukushintshwa kwemeshi okuqhubekayo, ngokuvamile kusetshenziswa isishintshi semeshi esikabili. Isidingo samandla emoto siphezulu kakhulu, futhi amabhulokhi amaningi okugunda asetshenziswa ezingxenyeni zesikulufu;

1: Ukuqinisekisa ukuphakelwa kahle kwezinto ezifana ne-PP ne-DCP;

2: Thola i-aspect ratio efanele kanye nokuma kwe-axial kokuvula ngokusekelwe kuhhafu wempilo yefomula eyinhlanganisela (eguqukele esizukulwaneni sesithathu ukuze kuqinisekiswe ukukhishwa okubushelelezi kokusabela kwe-CR-PP);

3: Ukuqinisekisa isivuno esiphezulu seminwe encibilikisiwe phakathi kwebanga lokubekezelelana (imicu eqediwe engaphezu kuka-30 inokusebenza ngempumelelo kwezindleko eziphezulu kanye nesisekelo sokuhlanganisa uma kuqhathaniswa neshumi nambili kuphela);

4: Amakhanda esikhunta angaphansi kwamanzi akhethekile kufanele afakwe. Ukuncibilika nokushisa kufanele kusatshalaliswe ngokulinganayo, futhi inani lemfucuza kufanele libe lincane;

5: Kunconywa ukuhlomisa i-granulator ebandayo evuthiwe yezinto ezincibilikayo (enegama elihle embonini) ukuze kuqinisekiswe ikhwalithi yama-granules aqediwe kanye nezinga eliphezulu lokukhiqiza;

6: Uma kunempendulo yokutholwa ku-inthanethi, kungaba ngcono nakakhulu.

Ngaphezu kwalokho, isiqalisi sokucekela phansi esinezelwe ekuphakeleni okuseceleni ngoketshezi sidinga ukunemba okuphezulu ngenxa yesilinganiso esincane sokwengeza. Okwemishini yokudla eseceleni efana neBrabenda engenisiwe, iKubota, kanye neMatsunaga ekhiqizwa ekhaya.

I-catalyst yokwehlisa isithunzi esetshenziswayo njengamanje

1: I-Di-t-butyl peroxide, eyaziwa nangokuthi i-di tert butyl peroxide, initiator a and vulcanizing agent dTBP, iwuketshezi olungenambala ukuya kokuphuzi okubonakala kancane olungancibiliki emanzini futhi luxubene nezinyibilikisi zemvelo ezifana ne-benzene, toluene, ne-acetone. I-oxidizing kakhulu, iyavutha, izinzile ezingeni lokushisa legumbi, ayizwani nomthelela.

2: I-DBPH, efushanisiwe njenge-2,5-dimethyl-2,5-bis (tert butylperoxy) hexane, inesisindo se-molecular 290.44. Uketshezi oluphuzi olukhanyayo, ukunamathisela okufana nempushana emhlophe enobisi, nokuminyana kwesihlobo okungu-0.8650. Indawo yokubanda 8 ℃. Indawo yokubilisa: 50-52 ℃ (13Pa). Inkomba ye-refractive 1.418~1.419. I-viscosity ye-liquid ingu-6.5 mPa. s. Iphoyinti elikhanyayo (inkomishi evulekile) 58 ℃. Incibilika kuzincibilikisi eziningi eziphilayo ezifana notshwala, ama-ether, ama-ketone, ama-ester, nama-hydrocarbon anephunga elimnandi, angancibiliki emanzini.

3: Ukuhlolwa kokuncibilika kweminwe

Ukuhlolwa komunwe wokuncibilika kudinga ukwenziwa ngokuhambisana ne-GB/T 30923-2014 Polypropylene Melt Spray Special Materials; Izihloli zeminwe ezincibilikayo ezijwayelekile azikwazi ukuhlolwa. Iphuzu eliphezulu lokuncibilika libhekisela ekusetshenzisweni kwendlela yevolumu kunendlela yobuningi bokuhlola.

I-Dongguan Liansheng Non woven Technology Co., Ltd.yasungulwa ngoMeyi 2020. Kuyibhizinisi elikhulu lokukhiqiza indwangu engalukiwe ehlanganisa ucwaningo nentuthuko, ukukhiqiza, nokudayiswa. Ingakwazi ukukhiqiza imibala ehlukahlukene ye-PP spunbond izindwangu ezingalukiwe ezinobubanzi obungaphansi kwamamitha angu-3.2 ukusuka ku-9 amagremu kuya ku-300 amagremu.