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Umugqa Wokunwetshwa Kweshidi Lomgoqo We-PP/PE/PA/PETG/EVOH

Isithombe Esivelele Somugqa Wokunwetshwa Kweshidi Lomgoqo We-PP/PE/PA/PETG/EVOH
  • Umugqa Wokunwetshwa Kweshidi Lomgoqo We-PP/PE/PA/PETG/EVOH

Incazelo emfushane:

Amashidi okupakisha epulasitiki avame ukusetshenziselwa ukukhiqiza izinkomishi zepulasitiki ezilahlwayo, amapuleti, izitsha, izitsha, amabhokisi kanye neminye imikhiqizo ye-thermoforming, esetshenziswa kabanzi ekupakisheni ukudla, imifino, izithelo, iziphuzo, imikhiqizo yobisi, izingxenye zezimboni kanye neminye imikhakha. Inezinzuzo zokuthamba, ukucaca okuhle kanye nokulula ukwenziwa ngezitayela ezidumile zezimo ezahlukahlukene. Uma kuqhathaniswa nengilazi, akulula ukuyiphula, ilula ngesisindo futhi ilungele ukuthuthwa.


Imininingwane Yomkhiqizo

Amathegi Omkhiqizo

Ipharamitha Eyinhloko Yobuchwepheshe

Imodeli yomugqa Imodeli yokukhipha Ububanzi bemikhiqizo Ubukhulu bemikhiqizo Umkhiqizo wokukhipha umklamo
Izendlalelo ezingu-7 zokuxhumanisa ndawonye 120/75/50/60/75 800-1200mm 0.2-0.5mm 500-600kg/h
Izendlalelo ezingu-9 zokuxhumanisa ndawonye 75/100/60/65/50/75/75 800-1200mm 0.05-0.5mm 700-800kg/h

Qaphela: Imininingwane ingashintsha ngaphandle kwesaziso sangaphambilini.

Umugqa Wokunwetshwa Kweshidi Lomgoqo We-EVOH Wezingqimba Eziningi 1

Isimo semakethe sezicelo zokupakisha ze-EVOH

Emkhakheni wokupakisha ukudla okune-cold chain, abantu basebenzisa izinto zensimbi noma zengilazi njengokupakisha ukudla ukuze bahlukanise ngempumelelo ukungena kwezingxenye ezahlukene zegesi ngaphakathi nangaphandle ukuqinisekisa ikhwalithi yokuqukethwe kanye nenani lezimpahla. Ngoba kunezici ezintathu ezinkulu ezibangela ukonakala kokudla: izici zezinto eziphilayo (ukusabela kwe-enzyme yezinto eziphilayo, njll.), izici zamakhemikhali (ikakhulukazi ukonakala kwezingxenye zokudla) kanye nezici zomzimba (i-hygroscopic, ukomisa, njll.). Lezi zinto zidlala indima ezimweni zemvelo ezifana nomoya-mpilo, ukukhanya, izinga lokushisa, umswakama, njll., okubangela ukonakala kokudla. Ukuvimbela ukonakala kokudla ngokuyinhloko ukuvimbela ukwanda kwamagciwane ekudleni, ukuvimbela ukonakala kwezingxenye zokudla nge-oxygen, nokuvimbela umswakama nokugcina ukunambitheka kokuqala kokudla.

I-ethylene-vinyl alcohol copolymer, ebizwa ngokuthi i-EVOH, yaziwa njengama-barrier resins amathathu amakhulu emhlabeni kanye ne-polyvinylidene chloride (PVDC) kanye ne-polyamide (PA) [2]. I-EVOH ingavimbela kakhulu ukungena komoya-mpilo emoyeni ekudleni, ngaleyo ndlela ivimbele ukukhiqizwa kobuthi nezinye izinto eziyingozi ngenxa yokwanda kwamagciwane, futhi ingavimbela nezinguquko zokwakheka okubangelwa yi-oxidation, ngenkathi igcina iphunga futhi ivimbele ukungcoliswa kwephunga langaphandle. Ngaphezu kwalokho, ukuntuleka kwezakhiwo zokuvimbela umswakama kungakhokhelwa ngezinye izendlalelo ze-polyolefin. Ngakho-ke, izinto zokupakisha ze-EVOH eziningi zingavimbela ngempumelelo ukonakala kokudla futhi zandise isikhathi sokuphila. Ngaphezu kwalokho, kulula ukuzicubungula nokuyikha, futhi zisebenza kahle ekuvikeleni imvelo. Ngenxa yezakhiwo ezinhle kakhulu zokuvimbela igesi, ukucaca, ukucutshungulwa kanye nokumelana nokuncibilika kwe-EVOH resin, amasimu okusetshenziswa kwayo aya ngokuya eba maningi, futhi isidingo sikhula ngokushesha.

I-resin ye-EVOH enesithintelo esiphezulu

1. Izakhiwo zezinto ezibonakalayo
Izakhiwo zokuvimbela ze-EVOH Izakhiwo zokuvimbela zezinto ze-polymer zibhekisela ekhonweni lokuvikela imikhiqizo kumagesi amancane ama-molecule, uketshezi, umhwamuko wamanzi, njll. Izinhlobo ze-resin ezisetshenziswa kakhulu njengamanje ezinezakhiwo ezinhle zokuvimbela zifaka: i-EVOH, i-PVDC, i-PAN, i-PEN, i-PA kanye ne-PET.

2. Uma i-EVOH isetshenziswa njengento evimbela kakhulu, ivame ukusebenzisa isakhiwo esihlanganisiwe esinezingqimba eziningi. Izinto ezihlanganisiwe ezisetshenziswa kakhulu yilezi: i-PP, i-HIPS, i-PE, i-EVOH, i-AD, kanye ne-AD iyisinamathiseli esakhiweni. Isakhiwo esihlanganisiwe esinezingqimba eziningi singanikeza ukudlala okugcwele ezimpahleni zento ngayinye, sithuthukise ukumelana namanzi kwe-EVOH, futhi sithole impahla evimbela kakhulu enezakhiwo ezinhle kakhulu eziphelele. Iningi lazo lalisetshenziswa ekupakisheni okuguquguqukayo esikhathini esidlule, kodwa ama-resin ahlanganisiwe njenge-PP, i-PE, ne-PA akulula ukuwashaya ngenxa yokuqina kwawo okuhle kanye nokuqina okubi, okunciphisa ukusetshenziswa kwawo emkhakheni wokupakisha okuqinile, ikakhulukazi emikhiqizweni yokugcwalisa eku-inthanethi. I-polystyrene HIPS engamelani nokuthinteka inokuqina okuhle kanye nezakhiwo ezinhle kakhulu zokubumba, ezifanele ukubhoboza futhi zifanele izinto zokupakisha eziqinile. Ngakho-ke, kuphuthuma kakhulu ukuthuthukisa ngamandla izinto ezihlanganisiwe ze-EVOH ezinezingqimba eziningi ezifanele ukupakishwa okuqinile.

Ngenxa yokuhambisana okungekuhle phakathi kwe-EVOH resin kanye ne-HIPS resin, kanye nomehluko omkhulu wesilinganiso se-resin rheology, amandla okubopha phakathi kwe-substrate kanye ne-EVOH, izidingo zezakhiwo zokudonsa ze-EVOH ngesikhathi sokubumba kwesibili, kanye nokusatshalaliswa kwezingqimba ze-EVOH ngesikhathi sokucubungula ukuze kukhiqizwe amashidi ahlanganisiwe. Ukufana kwezinto ezihlanganisiwe kuyizinkinga ezibalulekile ezithinta ukusebenza nokusetshenziswa kwezinto ezihlanganisiwe, futhi futhi kuyizinkinga ezinzima ezidinga ukuxazululwa lapho kukhiqizwa lolu hlobo lwezinto ezihlanganisiwe.

Isihluthulelo sobuchwepheshe be-co-extrusion yezingqimba eziningi yi-glue (AD). Izinto zokupakisha ezihlanganisiwe ze-EVOH zivame ukufaka i-PPEVOH, kodwa i-PP ne-EVOH azikwazi ukuhlanganiswa ngqo ngokushisa, futhi i-glue (AD) kumele ifakwe phakathi kwe-PP ne-EVOH. Lapho ukhetha i-glue, kubalulekile ukucabangela i-glue ye-PP njengezinto eziyisisekelo, okwesibili ukufana kwe-viscosity encibilikayo ye-PP ne-EVOH, kanti okwesithathu isidingo sezakhiwo zokubopha, ukuze kugwenywe ukwahlukana ngesikhathi sokucubungula kwesibili. Ngakho-ke, amashidi ahlanganisiwe ikakhulukazi amashidi ahlanganisiwe anezingqimba ezinhlanu (PPADEVOHADPP). /AD/EVOH/AD/R/PP, ungqimba olungaphandle luyizinto ezintsha ze-PP, kanti ezinye izingqimba ezimbili ziyizinto ezisetshenzisiwe ze-PP ezichotshoziwe i-R(PP). Isakhiwo esingalingani singasetshenziswa futhi, kanti ezinye izinto (PE/HIPS, njll.) zingangezwa ukuze kuhlanganiswe i-glue. Isimiso siyafana, futhi indlela efanayo ye-co-extrusion yezingqimba eziningi ingafinyelelwa.

Isicelo

Izinto ze-EVOH zinezakhiwo ezinhle zokuvimba. Ngobuchwepheshe boku-co-extrusion obusebenzisa i-PP, i-PE, i-PA, i-PETG nezinye izinto, zingacutshungulwa zibe izinto zokupakisha ezilula ezinezingqimba ezi-5, ezinezingqimba ezi-7, kanye nezingqimba ezi-9, ezisetshenziswa kakhulu ekupakisheni okungenamagciwane, iziphuzo zejeli, imikhiqizo yobisi, ukupakisha kwezinhlanzi ezibandayo kanye nemikhiqizo yenyama njll. Esimweni esingeyona ukudla, isetshenziswa ekupakisheni kwemithi, okushintshashintshayo kwe-solvent kanye neminye imikhakha, enezakhiwo ezinhle kakhulu zokuvimba, okuthuthukisa kakhulu impilo yeshelufu yemikhiqizo.

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