Munguva ichangopfuura, mask zvinhu zvakagamuchira kutariswa kwakawanda, uye vashandi vedu vepolymer havana kudziviswa muhondo iyi yekurwisa denda. Nhasi tichasuma magadzirirwo akaitwa PP zvinhu zvakanyungudutswa.
Kudiwa kwemusika kwepamusoro kunyungudika PP
Kunyungudika kuyerera kwepolypropylene kwakabatana zvakanyanya nehuremu hwayo hwemamorekuru. Huremu huremu hwema molecular huremu hwekutengesa polypropylene resin yakagadzirwa neyakajairwa Ziegler Natta catalytic system kazhinji iri pakati pe3 × 105 uye 7 × 105. Iyo melt index yeaya akajairwa polypropylene resins kazhinji yakaderera, iyo inoganhura maitiro avo ekushandisa.
Nekukurumidza kusimudzira kweindasitiri yemakemikari faibha uye indasitiri yemachira, iyo isiri-yakarukwa indasitiri yemachira yasimuka nekukurumidza. Iwo akatevedzana mabhenefiti epolypropylene anoita kuti ive iyo yakasarudzika machira emachira asiri akarukwa. Nekuvandudzwa kwenharaunda, nzvimbo dzekushandisa dzemachira asina kurukwa dzinowanzove dzakafara: mumunda wekurapa uye hutano,micheka isina kurukwainogona kushandiswa kugadzira majasi ekuzviparadzanisa nevamwe, masikisi, majasi ekuvhiya, ma napkins ehutsanana evakadzi, manapukeni evana, zvichingodaro; Sechivakwa uye geotechnical zvinhu, machira asiri akarukwa anogona kushandiswa kudzivirira mvura padenga, kuvaka migwagwa, uye mapurojekiti ekuchengetedza mvura, kana denga repamusoro rinonzwika rinogona kugadzirwa uchishandisa spunbond uye tsono yakaroverwa composite tekinoroji. Hupenyu hwayo hwesevhisi ndeye 5-10 nguva yakareba kupfuura yechinyakare asphalt yakanzwa; Sefa zvinhu zvakare ndeimwe yezvigadzirwa zvinokurumidza kusimukira mumachira asiri akarukwa, anogona kushandiswa gasi uye kusefa kwemvura mumaindasitiri akadai sekemikari, mishonga, uye chikafu, uye ane mukana mukuru wemusika; Pamusoro pezvo, machira asina kurukwa anogona kushandiswa kugadzira matehwe ekugadzira, mabhegi, machira embatya, machira ekushongedza, uye machira ekupukuta muhupenyu hwezuva nezuva uye kushandiswa kwemba.
Nekuda kwekuenderera mberi kwekugadzirwa kwemachira asiri akarukwa, zvinodikanwa pakugadzirwa kwavo uye kushandiswa zviri kuramba zvichiwedzera, sekunyunguduka kunoputika, kugadzirwa kwepamusoro-soro, uye zvigadzirwa zvitete. Naizvozvo, izvo zvinodikanwa zvekugadzirisa kuita kwepolypropylene resin, iyo huru mbishi yemachira asiri akarukwa, yakawedzerawo zvinoenderana; Mukuwedzera, kugadzirwa kwepamusoro-speed spinning kana fine denier polypropylene fibers inodawo polypropylene resin kuti ive yakanaka yakanyunguduka kuyerera zvinhu; Mamwe ma pigment asingakwanisi kumira tembiricha yakakwira anoda kugadziriswa kwepolypropylene semutakuri pane tembiricha yakadzikira. Zvose izvi zvinoda kushandiswa kwe-ultra-high melt index polypropylene resin sezvinhu zvakasvibirira zvinogona kugadziriswa pakudzika kwakadzika.
Izvo zvakakosha zvemicheka yakanyunguduka ndeye yakakwira melt index polypropylene. Iyo melt index inoreva kuwanda kwezvinhu zvakanyungudutswa zvinopfuura neyakajairwa die capillary maminetsi gumi ega ega. Iyo yakakura kukosha, zviri nani kugadzirisa fluidity yezvinhu. Iyo yakakwira iyo melt index yepolypropylene, ndiko kukwenenzverwa kwemafiber kunze, uye zvirinani kuita kusefa kweyakagadzirwa yakanyungudutswa jira.
Nzira yekugadzirira yakakwira melt index polypropylene resin
Imwe ndeye kudzora huremu hwema molecular uye kugovera huremu hwepolypropylene nekudzora iyo polymerization reaction process, sekushandisa nzira dzekuwedzera kuunganidzwa kwezvidziviriro zvakaita sehydrogen kudzikisa huremu hwepolymer, nekudaro ichiwedzera iyo melt index. Iyi nzira inogumira nezvinhu zvakaita se catalytic system uye maitiro ekuita, zvichiita kuti zviome kudzora kugadzikana kweiyo melt index uye kuita.
Yanshan Petrochemical yanga ichishandisa metallocene catalysts kune yakananga polymerization yezvinhu zvakanyungudutswa zvakanyunguduka ine melt index inopfuura 1000 mumakore mashoma apfuura. Nekuda kwekuoma kwekudzora kugadzikana, hombe-ye polymerization haina kuitwa. Kubva pakatanga denda iri gore rino, Yanshan Petrochemical yakatora iyo inodzoreka kushatisa polypropylene melt blown material yekugadzira tekinoroji yakagadziridzwa muna 2010 kugadzira polypropylene yakanyungudutswa isina-yakarukwa jira rakakosha musi wa12 Kukadzi. Panguva imwecheteyo, bvunzo dzeindasitiri dzakaitwa pachishandiso uchishandisa metallocene catalysts. Chigadzirwa chacho chakagadzirwa uye parizvino chiri kutumirwa kune vashandisi vepasi kuti vaedzwe.
Imwe nzira ndeyekudzora kushatiswa kwepolypropylene inowanikwa kuburikidza neyakajairwa polymerization, kuderedza uremu hwayo hwemamorekuru uye kuwedzera kunyungudika kwayo.
Munguva yakapfuura, nzira dzekudzikisa kupisa kwepamusoro dzaiwanzoshandiswa kuderedza uremu hwema molecular ye polypropylene, asi iyi nzira yekupisa yemagetsi yepamusoro ine zvipingamupinyi zvakawanda, zvakadai sokurasikirwa kwezvinowedzera, kuora kwekushisa, uye maitiro asina kugadzikana. Mukuwedzera, kune nzira dzakadai se ultrasonic degradation, asi nzira idzi dzinowanzoda kuvapo kwezvinonyungudutsa, izvo zvinowedzera kuoma uye mari yekuita. Mumakore achangopfuura, nzira yekuparara kwemakemikari ye polypropylene zvishoma nezvishoma yakashandiswa zvakanyanya.
Kugadzirwa kweiyo yakakwira melt index PP nemakemikari degradation nzira
Iyo makemikari degradation nzira inosanganisira reacting polypropylene nemakemikari degradation agents senge organic peroxides mune screw extruder, zvichiita kuti cheni dzemamorekuru epolypropylene atyoke uye kuderedza huremu hwadzo. Zvichienzaniswa nedzimwe nzira dzekushatisa, ine zvakanakira kuparara kwakazara, yakanaka kunyunguduka kuyerera, uye nyore uye inogoneka gadziriro yekugadzirira, zvichiita kuti zvive nyore kuita hukuru hwekugadzira maindasitiri. Iyi zvakare ndiyo nzira inonyanya kushandiswa nevagadziri vepurasitiki vakagadziridzwa.
Equipment zvinodiwa
Yakakwira yekunyungudika inoreva michina yakasiyana zvachose kubva kune yakajairwa PP yekugadziridza michina. Midziyo inoshandiswa pakupfapfaidza zvinhu zvakanyungudutswa inoda kurebesa chikamu uye musoro wemuchina wakatwasuka, kana kushandisa pasi pemvura granulation (Wuxi Huachen ine yakafanana yekucheka pasi pemvura); Izvo zvinhu zvakatetepa kwazvo uye zvinoda kusangana nemvura pakarepo mushure mekubuda mumusoro wemuchina kuti zvive nyore kutonhora;
Kugadzirwa kwezvakajairwa polypropylene kunoda extruder yekucheka kumhanya kwemamita makumi manomwe paminiti, nepo yakakwira melting point polypropylene inoda kukurumidza kucheka inopfuura 120 metres paminiti. Pamusoro pezvo, nekuda kwekukurumidza kuyerera kweyakanyanya kunyungudika polypropylene, kureba kwayo kwekutonhora kunodawo kuwedzerwa kubva pamamita mana kusvika gumi nemaviri.
Muchina wekugadzira zvinhu zvakanyungudutswa zvinoda kuramba uchichinja mesh, kazhinji uchishandisa mbiri chiteshi mesh shanduko. Iyo mota inodiwa yemagetsi yakakwira zvakanyanya, uye mamwe mashear block anoshandiswa mune screw zvikamu;
1: Iva nechokwadi chekudyisa kwakanaka kwezvinhu zvakaita sePP neDCP;
2: Sarudza iyo yakakodzera chikamu cheyero uye axial chinzvimbo chekuvhura zvichibva pahafu yehupenyu hweiyo composite formula (iyo yakashanduka kusvika kuchizvarwa chechitatu kuti ive nechokwadi chekuwedzera kwakatsetseka kweCR-PP kuita);
3: Kuve nechokwadi chegoho repamusoro rezvigunwe zvakanyungudutswa mukati mekushivirira renji (anopfuura makumi matatu akapedzwa mitsetse ine yakakwira mutengo-inoshanda uye yekusanganisa hwaro uchienzaniswa negumi nemaviri mitsetse);
4: Yakakosha pasi pemvura mold misoro inofanirwa kuve nemidziyo. Iko kunyunguduka uye kupisa kunofanira kugoverwa zvakaenzana, uye huwandu hwemarara hunofanira kuva hushoma;
5: Zvinokurudzirwa kugadzirira yakakura inotonhora granulator yezvinhu zvakanyunguduka (iyo ine mukurumbira wakanaka muindasitiri) kuve nechokwadi chemhando yemagranules akapedzwa uye chiyero chegoho chepamusoro;
6: Kana paine online yekuona mhinduro, zvingave nani.
Pamusoro pezvo, degradation initiator yakawedzerwa kudivi rekudya nemvura inoda kurongeka kwepamusoro nekuda kwechiyero chidiki chekuwedzera. Zvemidziyo yekudyisa padivi seyakatengwa kunze kwenyika Brabenda, Kubota, uye Matsunaga anogadzirwa mudzimba.
Iyo degradation catalyst inoshandiswa parizvino
1: Di-t-butyl peroxide, inozivikanwawo se di tert butyl peroxide, initiator a and vulcanizing agent dTBP, imvura isina ruvara kusvika kuyero zvishoma inoonekera isinganyungudike mumvura uye inosanganiswa nezvinonyungudutsa zveorganic zvakaita sebenzene, toluene, uye acetone. Yakanyanya oxidizing, inopfuta, yakagadzikana pakamuri tembiricha, isinganzwe kukanganiswa.
2: DBPH, yakapfupikiswa se2,5-dimethyl-2,5-bis (tert butylperoxy) hexane, ine molecular uremu hwe290.44. Mvura yakatsvuka yero, namira senge uye mukaka chena hupfu, ine hushamwari hwe0.8650. Nzvimbo yechando 8 ℃. Poindi yekubikira: 50-52 ℃ (13Pa). Refractive index 1.418 ~ 1.419. Iyo mvura viscosity ndeye 6.5 mPa. s. Flash point (kapu yakazaruka) 58 ℃. Inonyungudika mune zvakawanda organic zvinonyungudutsa zvakaita sedoro, ether, ketoni, esters, uye anonhuwirira hydrocarbons, isinganyungudika mumvura.
3: Muedzo wekunyungudika kweminwe
Muedzo wemunwe wakanyunguduka unoda kuitwa maererano neGB/T 30923-2014 Polypropylene Melt Spray Special Materials; Zvekare zvinonyungudika zvigunwe zvinoedza hazvigone kuongororwa. High melting point inoreva kushandiswa kwevhoriyamu nzira kwete nzira yekuyedza.
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-08-2024