Ifilimu ehlanganisiweyo yeplastiki yinto eqhelekileyo esetyenziswayo yokupakisha ukupakishwa okuxhathisayo. Ukubuyiswa kunye nokunciphisa ubushushu yinkqubo ebalulekileyo yokupakisha ukutya okunobushushu obuphezulu. Nangona kunjalo, iipropathi ezibonakalayo zeefilimu ezihlanganisiweyo zeplastiki zithande ukubola emva kokufudumeza, okukhokelela kwizinto zokupakisha ezingafanelekanga. Eli nqaku lihlalutya iingxaki eziqhelekileyo emva kokupheka kweengxowa eziphezulu zokushisa, kwaye lazisa iindlela zabo zokuvavanya ukusebenza komzimba, ngethemba lokuba nokubaluleka okukhokelayo kwimveliso yangempela.
Izingxobo zokupakisha ezikwaziyo ukumelana nobushushu obuphezulu luhlobo lokupakisha oluqhele ukusetyenziselwa inyama, iimveliso zesoya kunye nenye imveliso yokutya esele ilungile. Ngokuqhelekileyo ivacuum ipakishwe kwaye inokugcinwa kwiqondo lobushushu begumbi emva kokufudunyezwa kunye nokuvalwa kobushushu obuphezulu (100~135°C). Ukutya okupakishweyo okungabuyi-retort kulula ukukuthwala, kulungele ukutyiwa emva kokuvula ibhegi, kucocekile kwaye kulula, kwaye kunokugcina incasa yokutya, ngoko ke ithandwa kakhulu ngabathengi. Ngokuxhomekeke kwinkqubo yokuvala inzalo kunye nezixhobo zokupakisha, ixesha leshelufu leemveliso zokupakisha ezichasene ne-retort ukusuka kwisiqingatha sonyaka ukuya kwiminyaka emibini.
Inkqubo yokupakisha ukutya okubuyiselayo kukwenza iingxowa, ukugrumba, ukutshayela, ukutywina ubushushu, ukuhlolwa, ukupheka kunye nokufudumeza inzala, ukomisa kunye nokupholisa, kunye nokupakishwa. Ukupheka kunye nokufudumeza inzala yinkqubo engundoqo yenkqubo yonke. Nangona kunjalo, xa iingxowa zokupakisha ezenziwe ngezinto ze-polymer - iiplastiki, ukunyakaza kwe-molecular chain chain kuqinisa emva kokufudumeza, kunye neempawu ezibonakalayo zezinto eziphathekayo zixhomekeke kwi-thermal attenuation. Eli nqaku lihlalutya iingxaki eziqhelekileyo emva kokupheka kweengxowa zokushisa eziphezulu, kwaye lazisa iindlela zabo zokuvavanya ukusebenza komzimba.
1. Uhlalutyo lweengxaki eziqhelekileyo kunye neengxowa zokupakisha ezichasene ne-retort
Ukutya okunobushushu obuphezulu kuyapakishwa kwaye emva koko kufudunyezwe kwaye kubulawe iintsholongwane kunye nezinto zokupakisha. Ukuze ufezekise iipropati eziphezulu zomzimba kunye neempawu ezintle zomqobo, ukupakishwa kwe-retort-resistant kwenziwa ngezinto ezahlukeneyo zesiseko. Izinto ezisetyenziswa ngokuqhelekileyo ziquka i-PA, i-PET, i-AL kunye ne-CPP. Izakhiwo ezisetyenziswa ngokuqhelekileyo zinemigangatho emibini yeefilimu ezidibeneyo, kunye nale mizekelo ilandelayo (BOPA / CPP , PET / CPP), ifilimu edibeneyo enemigangatho emithathu (efana ne-PA / AL / CPP, PET / PA / CPP) kunye nefilimu edibeneyo ezine. (ezifana ne-PET/PA/AL/CPP). Kwimveliso yokwenyani, ezona ngxaki zisemgangathweni zixhaphake yimibimbi, iingxowa ezaphukileyo, ukuvuza komoya kunye nevumba emva kokupheka:
1). Ngokuqhelekileyo kukho iindlela ezintathu zokushwabana kwiingxowa zokupakisha: imibimbi ethe tyaba okanye ethe nkqo okanye engaqhelekanga kwisiseko sokupakisha; imibimbi kunye nokuqhekeka kwinqanaba ngalinye le-composite kunye ne-flatness embi; i-shrinkage ye-packaging base material, kunye ne-shrinkage ye-composite layer kunye nezinye i-composite layers Ukwahlula, enemigca. Iingxowa ezaphukileyo zohlulwe zibe ziindidi ezimbini: ukugqabhuka ngokuthe ngqo kunye nokushwabana emva koko kugqabhuke.
2) .I-Delamination ibhekisela kwinto yokuba iileyile ezidibeneyo zezinto zokupakisha zihlukaniswe omnye komnye. I-delamination kancinane ibonakala njengamaqhuqhuva afana nemigca kwiindawo ezigxininisiweyo zepakethe, kwaye amandla okuxobula ayancipha, kwaye anokukrazulwa ngobunono ngesandla. Kwiimeko ezinzima, i-package composite layer ihlukaniswe kwindawo enkulu emva kokupheka. Ukuba i-delamination iyenzeka, ukomelezwa kwe-synergistic kwiipropathi ezibonakalayo phakathi kweengqimba ezidibeneyo zezinto zokupakisha ziya kunyamalala, kwaye iipropathi ezibonakalayo kunye neempawu zomqobo ziya kuhla kakhulu, zenza kube nzima ukuhlangabezana neemfuno zobomi beshelufa, zihlala zibangela ilahleko enkulu kwishishini. .
3) Ukuvuza komoya okuncinci kunexesha elide lokufukamela kwaye akulula ukukubona ngexesha lokupheka. Ngethuba lokujikeleza kwemveliso kunye nexesha lokugcinwa, i-vacuum degree yemveliso iyancipha kwaye umoya ocacileyo ubonakala kwipakethe. Ngoko ke, le ngxaki yomgangatho ihlala ibandakanya inani elikhulu leemveliso. iimveliso zinempembelelo enkulu. Ukwenzeka kokuvuza komoya kunxulumene ngokusondeleyo nokutywinwa kobushushu obubuthathaka kunye nokunganyangeki kokubhoboza kwengxowa yokubuyisela.
4). Ukuvumba emva kokupheka kwakhona kuyingxaki yomgangatho oqhelekileyo. Iphunga elikhethekileyo elivela emva kokupheka lihambelana neentsalela ze-solvent ezigqithisileyo kwizinto zokupakisha okanye ukukhetha izinto ezingafanelekanga. Ukuba ifilimu ye-PE isetyenziswe njengomgca wokutywina wangaphakathi weengxowa zokupheka eziphezulu zokushisa ngaphezu kwe-120 °, ifilimu ye-PE ilungele ukuvumba kwiqondo lokushisa eliphezulu. Ke ngoko, i-RCPP ikhethwa ngokubanzi njengomaleko wangaphakathi weengxowa zokupheka ezinobushushu obuphezulu.
2. Iindlela zokuvavanya iipropathi ezibonakalayo zokupakishwa kwe-retort-resistant
Izinto ezikhokelela kwiingxaki zomgangatho wokupakishwa kwe-retort-resistant zintsonkothile kwaye zibandakanya imiba emininzi efana ne-composite layer ekrwada, i-adhesives, i-inki, i-composite kunye nolawulo lwenkqubo yokwenza ibhegi, kunye neenkqubo zokubuyisela. Ukuze kuqinisekiswe umgangatho wokupakisha kunye nobomi beshelufu yokutya, kuyimfuneko ukuqhuba iimvavanyo zokumelana nokupheka kwizinto zokupakisha.
Umgangatho wesizwe osebenzayo kwiingxowa zokupakisha ezixhathisayo yi-GB/T10004-2008 "Ifilimu yePlastiki yePlastiki yokuPakisha, iBag Dry Lamination, Extrusion Lamination", esekelwe kwi-JIS Z 1707-1997 "Imigaqo Jikelele yeeFilimu zePlastiki yokuPakisha ukutya" Yenzelwe ukuba ithathe indawo ye-GB/T 10004-1998 "Buyisela iifilimu eziHlanganisiweyo eziNxibelelayo kunye neengxowa" kunye ne-GB / T10005-1998 "i-Biaxially Oriented Polypropylene Film / Low Density Polyethylene Composite Films and Bags". I-GB/T 10004-2008 ibandakanya iipropati ezahlukeneyo zomzimba kunye nezalathi zentsalela ye-solvent kwi-retort-resistant packaging films and bags, kwaye ifuna ukuba i-retort-resistant-resistant-packaging bags ivavanyelwe ukuxhathisa kwemidiya ephezulu. Indlela yokuzalisa iingxowa zokupakisha ezichasene ne-4% ye-acetic acid, i-1% ye-sodium sulfide, i-5% ye-sodium chloride kunye neoli yemifuno, emva koko ikhuphe kwaye itywine, ishushu kwaye icinezele kwi-high-pressure imbiza yokupheka kwi-121 ° C. Imizuzu ye-40, kwaye ipholile ngelixa uxinzelelo luhlala lungatshintshi. Ke inkangeleko yayo, ukomelela, ukomelela, amandla okuxobula kunye namandla okutywinwa kobushushu ayavavanywa, kwaye izinga lokuhla liyasetyenziswa ukuyivavanya. Ifomula yile ilandelayo:
R=(AB)/A×100
Kwifomula, i-R yireyithi yokuhla (%) yezinto ezivavanyiweyo, A yixabiso eliqhelekileyo lezinto ezivavanyiweyo phambi kovavanyo oluphakathi kobushushu obuphezulu; B lixabiso eliqhelekileyo lezinto ezivavanyiweyo emva kovavanyo oluphakathi kobushushu obuphezulu. Iimfuno zokusebenza zezi: "Emva kovavanyo lokumelana nobushushu be-dielectric ephezulu, iimveliso ezinobushushu benkonzo ye-80 ° C okanye ngaphezulu akufanele zibe ne-delamination, umonakalo, ukuguqulwa okucacileyo ngaphakathi okanye ngaphandle kwebhegi, kunye nokunciphisa amandla okuxobula, ukutsala- ukucima amandla, uxinzelelo oluqhelekileyo ngexesha lekhefu, kunye namandla okutywinwa kobushushu. Umlinganiselo kufuneka ube ≤30%”.
3. Uvavanyo lweempawu ezibonakalayo zeengxowa zokupakisha ezixhathisayo
Uvavanyo lwangempela kumatshini lunokubona ngokwenene ukusebenza ngokubanzi kwepakethe engaguqukiyo. Nangona kunjalo, le ndlela ayidli ixesha kuphela, kodwa iphinde inqunyelwe isicwangciso sokuvelisa kunye nenani leemvavanyo. Ayisebenzi kakuhle, inkunkuma enkulu, kunye neendleko eziphezulu. Ngovavanyo lwe-retort lokubona iipropathi ezibonakalayo ezinje ngepropathi ethambileyo, amandla e-peel, amandla etywina lobushushu ngaphambi nasemva kwe-retort, umgangatho wokumelana ne-retort wengxowa ye-retor unokugwetywa ngokubanzi. Iimvavanyo zokupheka ngokubanzi zisebenzisa iindidi ezimbini zemixholo yokwenyani kunye nezixhobo ezifanisiweyo. Uvavanyo lokupheka usebenzisa iziqulatho zangempela lunokuba lusondele ngokusemandleni kwimeko yemveliso yangempela kwaye lunokuthintela ngokufanelekileyo ukupakishwa okungafanelekanga ekungeneni kumgca wemveliso kwiibhetshi. Kwiifektri zezinto zokupakisha, ii-simulants zisetyenziselwa ukuvavanya ukuchasana kwezinto zokupakisha ngexesha lenkqubo yokuvelisa nangaphambi kokugcinwa. Ukuvavanya ukusebenza kokupheka kusebenza ngakumbi kwaye kuyasebenza. Umbhali wazisa indlela yokuvavanya ukusebenza komzimba kweengxowa zokupakisha ezinganyangekiyo ngokuzizalisa ngolwelo lokulinganisa ukutya oluvela kubavelisi abathathu abahlukeneyo kunye nokuqhuba uvavanyo lokutshisa kunye nokubilisa ngokulandelelana. Inkqubo yovavanyo ngolu hlobo lulandelayo:
1). Ukupheka uvavanyo
Izixhobo: Imbiza yokupheka ekhuselekile kwaye ekrelekrele ngasemva-uxinzelelo oluphezulu lobushushu, umvavanyi wetywina lobushushu le-HST-H3
Amanyathelo ovavanyo: Faka ngononophelo i-4% yeacetic acid kwingxowa yembuyekezo ukuya kwisibini kwisithathu somthamo. Qaphela ukuba ungangcolisi itywina, ukuze ungachaphazeli ukukhawuleza kokutywinwa. Emva kokuzalisa, vala iingxowa zokupheka nge-HST-H3, kwaye ulungiselele iisampuli ze-12 zizonke. Xa utywinwa, umoya engxoweni kufuneka uphelelwe kangangoko kunokwenzeka ukukhusela ukwanda komoya ngexesha lokupheka ekuchaphazeleni iziphumo zovavanyo.
Beka isampuli etywiniweyo embizeni yokupheka ukuqalisa uvavanyo. Beka ubushushu bokupheka kwi-121 ° C, ixesha lokupheka ukuya kwimizuzu engama-40, iisampuli ze-steam 6, kwaye ubilise iisampuli ezi-6. Ngexesha lokuvavanya ukupheka, qaphela kakhulu utshintsho loxinzelelo lomoya kunye nobushushu kwimbiza yokupheka ukuqinisekisa ukuba ubushushu kunye noxinzelelo lugcinwa ngaphakathi koluhlu olubekiwe.
Emva kokuba uvavanyo lugqityiwe, lupholile kwiqondo lobushushu begumbi, likhuphe kwaye lijonge ukuba kukho iingxowa ezaphukileyo, imibimbi, i-delamination, njl.njl delamination. Umphezulu we 3 # isampulu yayingekho mpuluswa kakhulu emva kokupheka, kwaye imiphetho yajijwa ukuya kumaqondo ahlukeneyo.
2). Ukuthelekiswa kweempawu zokuxinana
Thatha iingxowa zokupakisha phambi nasemva kokupheka, sika iisampulu ezi-5 ezixande ze-15mm×150mm kwicala elinqamlezayo kunye ne-150mm kwicala le-longitudinal, kwaye uzibeke kwindawo yeeyure ezi-4 kwindawo eyi-23±2℃ kunye ne-50±10%RH. I-XLW (PC) umatshini wokuvavanya i-electronic tensile ehlakaniphile yayisetyenziselwa ukuvavanya amandla okuqhawula kunye nokwandisa ngexesha lekhefu phantsi kwemeko ye-200mm / min.
3). Uvavanyo lwe-Peel
Ngokwendlela A ye-GB 8808-1988 "Indlela yoVavanyo lwe-Peel ye-Soft Composite Materials yePlastiki", usike isampuli ngobubanzi be-15± 0.1mm kunye nobude be-150mm. Thatha iisampulu ezi-5 nganye kwicala elithe tye kunye nelithe nkqo. I-peel kwangaphambili i-composite layer ecaleni kwendlela yobude besampulu, yilayishe kwi-XLW (PC) umatshini wokuvavanya i-electronic tensile ehlakaniphile, kwaye uvavanye amandla okukhupha kwi-300mm / min.
4). Uvavanyo lwamandla okutywinwa kobushushu
Ngokutsho kwe-GB/T 2358-1998 "Indlela yoVavanyo yokuFakwa kokutywinwa kobushushu bePlastiki yokuPakisha iiBags", usike isampuli ebanzi ye-15mm kwindawo yokutywina ukushisa kwesampulu, uyivule kwi-180 °, kwaye ubambe iziphelo zombini zesampulu. i-XLW (i-PC) ehlakaniphile Kumatshini wokuvavanya i-electronic tensile, umthwalo ophezulu uvavanywa kwisantya se-300mm / min, kwaye izinga lokuhla libalwa kusetyenziswa ifomula ye-dielectric yokumelana nokushisa okuphezulu kwi-GB / T 10004-2008.
Shwankathela
Ukutya okupakishweyo okumelana ne-retort kuya kuthandwa kakhulu ngabathengi ngenxa yokuba lula kwabo ekutyeni nasekugcineni. Ukuze kugcinwe ngokufanelekileyo umgangatho weziqulatho kunye nokuthintela ukutya ekuwohlokeni, onke amanyathelo enkqubo yokuvelisa ingxowa yokubuyisela ubushushu kufuneka ibekwe esweni ngokungqongqo kwaye ilawulwe ngokufanelekileyo.
1. Iingxowa zokupheka ezinokushisa okuphezulu kufuneka zenziwe ngezinto ezifanelekileyo ezisekelwe kumxholo kunye nenkqubo yokuvelisa. Ngokomzekelo, i-CPP ikhethwa ngokubanzi njengoluhlu lwangaphakathi lokutywinwa kweengxowa zokupheka ezinobushushu obuphezulu; xa iingxowa zokupakisha eziqulethe i-AL layers zisetyenziselwa ukupakisha iziqulatho ze-asidi kunye ne-alkaline, i-PA i-composite layer kufuneka yongezwe phakathi kwe-AL kunye ne-CPP ukwandisa ukuchasana ne-asidi kunye ne-alkali permeability; umaleko ngamnye oyintlanganisela Ukushwabana kobushushu kufuneka kuhambelane okanye kufane kuthintelwe ukujija okanye ukudityaniswa kwezinto emva kokupheka ngenxa yokungahambelani kakuhle kweempawu zokuncipha kobushushu.
2. Ukulawula ngokufanelekileyo inkqubo edibeneyo. Iingxowa zokubuyiswa kobushushu obuphezulu zisebenzisa indlela yokudibanisa eyomileyo. Kwinkqubo yokuvelisa ifilimu ye-retort, kuyimfuneko ukukhetha i-adhesive efanelekileyo kunye nenkqubo ye-gluing efanelekileyo, kunye nokulawula ngokufanelekileyo iimeko zokunyanga ukuze kuqinisekiswe ukuba i-agent ephambili ye-adhesive kunye ne-ejenti yokunyanga isabela ngokupheleleyo.
3. Ukumelana nokushisa okuphakathi kweqondo eliphezulu yinkqubo enzima kakhulu kwinkqubo yokupakishwa kweengxowa zokubuyisela ubushushu obuphezulu. Ukuze kuncitshiswe ukwenzeka kweengxaki zomgangatho webhetshi, iingxowa zobushushu obuphezulu kufuneka zivavanywe kwakhona kwaye zihlolwe ngokusekwe kwiimeko zokwenyani zemveliso phambi kokusetyenziswa nangexesha lemveliso. Jonga ukuba inkangeleko yepakethe emva kokupheka isicaba, ishwabene, inamadyungudyungu, ikhubazeke, ingaba kukho i-delamination okanye ukuvuza, nokuba ukwehla kwezinga leempawu ezibonakalayo (izakhiwo ezithambileyo, amandla e-peel, amandla okutywinwa kobushushu) ziyahlangabezana neemfuno, njl.
Ixesha lokuposa: Jan-18-2024
