Ifilimu eyinhlanganisela yepulasitiki iyinto evamise ukusetshenziselwa ukupakisha ukupakisha okungazweli. Ukuvala inzalo nokushisa kuyinqubo ebalulekile yokupakisha ukudla okunezinga lokushisa eliphezulu. Kodwa-ke, izinto ezibonakalayo zamafilimu ayinhlanganisela yepulasitiki zivame ukubola ngokushisa ngemva kokushiswa, okuholela ezintweni zokupakisha ezingafanelekile. Lesi sihloko sihlaziya izinkinga ezivamile ngemva kokupheka kwezikhwama ezibuyisela izinga lokushisa eliphezulu, futhi sethula izindlela zabo zokuhlola ukusebenza komzimba, ngethemba lokuba nokubaluleka okuyisiqondiso ekukhiqizeni kwangempela.
Izikhwama zokupakisha ezikwazi ukumelana nokushisa okuphezulu ziyifomu lokupakisha elivame ukusetshenziselwa inyama, imikhiqizo yesoya kanye nomunye umkhiqizo wokudla osulungile. Ivamise ukupakishwa nge-vacuum futhi ingagcinwa ekamelweni lokushisa ngemva kokushisisa nokuvalwa inzalo ezingeni lokushisa eliphezulu (100~135°C). Ukudla okupakishiwe okungavimbekiyo kulula ukukuthwala, kulungele ukudliwa ngemva kokuvula isikhwama, kuhlanzekile futhi kulula, futhi kungagcina ukunambitheka kokudla, ngakho-ke kuthandwa kakhulu ngabathengi. Ngokuya ngenqubo yokuvala inzalo nezinto zokupakisha, impilo yeshalofu yemikhiqizo yokupakisha engaphenduli isuka kuhhafu wonyaka iye eminyakeni emibili.
Inqubo yokupakisha ukudla okubuyisela emuva ukwenza izikhwama, ukugxumeka izikhwama, ukuhlanza, ukuvala ukushisa, ukuhlola, ukupheka nokushisisa ukuvala inzalo, ukomisa nokupholisa, kanye nokupakisha. Ukupheka nokushisisa inzalo kuwumgogodla wayo yonke inqubo. Kodwa-ke, lapho izikhwama zokupakisha ezenziwe ngezinto ze-polymer - amapulasitiki, ukunyakaza kwe-molecular chain kuqinisa ngemva kokushiswa, futhi izakhiwo ezibonakalayo zezinto ezibonakalayo zivame ukuncishiswa kokushisa. Lesi sihloko sihlaziya izinkinga ezivamile ngemva kokupheka kwezikhwama ezibuyisela izinga lokushisa eliphezulu, futhi sethula izindlela zabo zokuhlola ukusebenza komzimba.
1. Ukuhlaziywa kwezinkinga ezijwayelekile ngezikhwama zokupakisha ezimelana ne-retort
Ukudla okunezinga lokushisa eliphezulu kuyapakishwa bese kufudunyezwa futhi kubulawe amagciwane kanye nezinto zokupakisha. Ukuze kuzuzwe izakhiwo eziphakeme zomzimba kanye nezakhiwo ezinhle zokuvimbela, ukupakishwa okungamelana ne-retort kwenziwa ngezinto ezihlukahlukene eziyisisekelo. Izinto ezisetshenziswa kakhulu zifaka i-PA, i-PET, i-AL ne-CPP. Izakhiwo ezisetshenziswa kakhulu zinezingqimba ezimbili zamafilimu ayinhlanganisela, nezibonelo ezilandelayo (BOPA/CPP , PET/CPP), ifilimu eyinhlanganisela yezendlalelo ezintathu (njenge-PA/AL/CPP, PET/PA/CPP) kanye nefilimu eyinhlanganisela yezendlalelo ezine. (njenge-PET/PA/AL/CPP). Ekukhiqizeni kwangempela, izinkinga zekhwalithi ezivame kakhulu imibimbi, izikhwama eziphukile, ukuvuza komoya kanye nephunga ngemva kokupheka:
1). Ngokuvamile kunezinhlobo ezintathu zokushwabana ezikhwameni zokupakisha: imibimbi evundlile noma eqondile noma engajwayelekile kusisekelo sokupakisha; imibimbi kanye nemifantu kungqimba ngalunye oluyinhlanganisela kanye nokungafihli kahle; Ukuncipha kwesisekelo sokupakisha, kanye nokuncipha kongqimba oluyinhlanganisela nezinye izendlalelo eziyinhlanganisela Zihlukene, ezinemigqa. Izikhwama eziphukile zihlukaniswe zibe izinhlobo ezimbili: ukuqhuma okuqondile kanye nokushwabana bese kuqhuma.
2).I-Delamination ibhekisela esimweni sokuthi izingqimba ezihlanganisiwe zezinto zokupakisha zihlukaniswa komunye nomunye. I-delamination encane ibonakala njengamaqhuqhuva anjengomthende ezingxenyeni ezigcizelelwe zokupakisha, futhi amandla okucwecwa ayancishiswa, futhi angadatshulwa ngisho ngobumnene ngesandla. Ezimweni ezimbi kakhulu, isendlalelo esiyinhlanganisela yokupakisha sihlukaniswa endaweni enkulu ngemva kokupheka. Uma kwenzeka i-delamination, ukuqiniswa kwe-synergistic kwezakhiwo ezibonakalayo phakathi kwezingqimba ezihlanganisiwe zezinto zokupakisha kuzonyamalala, futhi izakhiwo ezingokomzimba kanye nezakhiwo zesithiyo zizokwehla kakhulu, okwenza kube nzima ukuhlangabezana nezidingo zempilo yeshelufu, okuvame ukubangela ukulahlekelwa okukhulu ebhizinisini. .
3) Ukuvuza komoya okuncane ngokuvamile kunesikhathi eside sokufukamela futhi akulula ukukubona ngesikhathi sokupheka. Ngesikhathi sokujikeleza komkhiqizo nesikhathi sokugcina, izinga le-vacuum lomkhiqizo liyancipha futhi umoya osobala uvela emaphaketheni. Ngakho-ke, le nkinga yekhwalithi ngokuvamile ihilela inani elikhulu lemikhiqizo. imikhiqizo inomthelela omkhulu. Ukuvela kokuvuza komoya kuhlobene eduze nokuvalwa kokushisa okubuthakathaka kanye nokumelana nokubhoboza okungekuhle kwesikhwama se-retort.
4). Iphunga ngemva kokupheka futhi kuyinkinga evamile yekhwalithi. Iphunga elingavamile elivela ngemva kokupheka lihlobene nezinsalela ze-solvent ngokweqile ezintweni zokupakisha noma ukukhetha okungafanele. Uma ifilimu ye-PE isetshenziswa njengesendlalelo sokuvala sangaphakathi sezikhwama zokupheka ezishisa kakhulu ezingaphezu kuka-120 °, ifilimu ye-PE ijwayele ukunuka emazingeni okushisa aphezulu. Ngakho-ke, i-RCPP ivame ukukhethwa njengesendlalelo sangaphakathi sezikhwama zokupheka ezisezingeni eliphezulu.
2. Izindlela zokuhlola zezakhiwo ezibonakalayo zokupakisha ezimelana ne-retort
Izinto eziholela ezinkingeni zekhwalithi zokupakishwa ezikwazi ukumelana ne-retort ziyinkimbinkimbi futhi zibandakanya izici eziningi ezifana nezinto ezingavuthiwe zesendlalelo esiyinhlanganisela, izinto zokunamathisela, oyinki, ukulawulwa kwenqubo eyinhlanganisela kanye nokwenza izikhwama, nezinqubo zokubuyisela emuva. Ukuze uqinisekise ikhwalithi yokupakisha nempilo yeshalofu yokudla, kuyadingeka ukwenza izivivinyo zokumelana nokupheka ezintweni zokupakisha.
Izinga likazwelonke elisebenza ezikhwameni zokupakisha ezikwazi ukumelana nokuphindiselwa yi-GB/T10004-2008 “Ifilimu Eyinhlanganisela Yepulasitiki Yokufaka, Isikhwama Esomile I-Lamination, I-Extrusion Lamination”, esekelwe ku-JIS Z 1707-1997 “Izimiso Ezijwayelekile Zamafilimu Epulasitiki Wokupakisha Ukudla” Yakhelwe ukuthatha indawo ye-GB/T 10004-1998 "Buyisela Amafilimu Nezikhwama Ezihlanganisiwe Eziphikisanayo" kanye ne-GB/T10005-1998 "Ifilimu ye-Biaxially Oriented Polypropylene/Amafilimu Nezikhwama Ezihlanganisiwe Ze-Polyethylene Ephansi". I-GB/T 10004-2008 ihlanganisa izakhiwo ezihlukahlukene zomzimba kanye nezinkomba zensalela yencibilikizo zamafilimu nezikhwama zokupakisha ezikwazi ukumelana ne-retort, futhi idinga ukuthi izikhwama zokupakisha ezikwazi ukumelana ne-retort zihlolwe ukumelana nezinga lokushisa eliphezulu kwemidiya. Indlela yokugcwalisa izikhwama zokupakisha ezikwazi ukumelana ne-retort nge-4% i-acetic acid, i-1% ye-sodium sulfide, i-5% ye-sodium chloride namafutha emifino, bese ukhipha futhi uvale, ushise futhi ucindezele embizeni yokupheka enengcindezi ephezulu ku-121 ° C Imizuzu engama-40, bese upholile ngenkathi ingcindezi ingashintshile. Bese kuhlolwa ukubukeka kwayo, amandla aqinile, ukwelula, amandla okuxebuka namandla okuvala ukushisa kuyahlolwa, futhi izinga lokwehla liyasetshenziswa ukuyihlola. Ifomula imi kanje:
R=(AB)/A×100
Kufomula, u-R izinga lokwehla (%) lezinto ezihloliwe, A inani eliyisilinganiso lezinto ezihloliwe ngaphambi kokuhlolwa okuphakathi nendawo okumelana nezinga lokushisa eliphezulu; B inani eliyisilinganiso lezinto ezihloliwe ngemva kokuhlolwa okumaphakathi kokumelana nezinga lokushisa eliphezulu. Izidingo zokusebenza yilezi: “Ngemva kokuhlolwa kokumelana nezinga lokushisa eliphezulu kwe-dielectric, imikhiqizo enezinga lokushisa lesevisi engu-80°C noma ngaphezulu akufanele ibe nokuncipha, umonakalo, ukonakala okusobala ngaphakathi noma ngaphandle kwesikhwama, kanye nokuncipha kwamandla okuxebuka, ukudonsa- ukucisha amandla, uhlobo oluthile ngesikhathi sekhefu, namandla okuvala ukushisa. Izinga kufanele libe ngu-≤30%”.
3. Ukuhlolwa kwezakhiwo ezibonakalayo zezikhwama zokupakisha ezikwazi ukumelana ne-retort
Ukuhlolwa kwangempela emshinini kungathola ngempela ukusebenza okuphelele kwephakheji elimelana ne-retort. Kodwa-ke, le ndlela ayidli isikhathi kuphela, kodwa futhi inqunyelwe uhlelo lokukhiqiza kanye nenani lokuhlolwa. Ayisebenzi kahle, imosha imali enkulu, nezindleko eziphezulu. Ngokuhlolwa kwe-retort ukuthola izakhiwo ezibonakalayo ezifana nezakhiwo eziqinile, amandla e-peel, amandla okuvalwa kokushisa ngaphambi nangemva kokuphindaphinda, ikhwalithi yokumelana ne-retort yesikhwama sokubuyisela ingahlulelwa ngokuphelele. Izivivinyo zokupheka ngokuvamile zisebenzisa izinhlobo ezimbili zokuqukethwe kwangempela nezinto ezilingiswayo. Ukuhlolwa kokupheka kusetshenziswa okuqukethwe kwangempela kungaba seduze ngangokunokwenzeka esimweni sangempela sokukhiqiza futhi kungavimbela ngempumelelo ukupakishwa okungafanelekile ukuthi kungene emgqeni wokukhiqiza ngamaqoqo. Emafektri wezinto zokupakisha, ama-simulants asetshenziselwa ukuhlola ukumelana kwezinto zokupakisha ngesikhathi senqubo yokukhiqiza nangaphambi kokugcinwa. Ukuhlola ukusebenza kokupheka kusebenza kakhulu futhi kuyasebenziseka. Umbhali wethula indlela yokuhlola ukusebenza komzimba yezikhwama zokupakisha ezingaphenduli ngokuzigcwalisa ngoketshezi lokulingisa ukudla oluvela kubakhiqizi abathathu abahlukene nokwenza izivivinyo zokubilisa nokubilisa ngokulandelana. Inqubo yokuhlola imi kanje:
1). Ukuhlolwa kokupheka
Amathuluzi: Ibhodwe lokupheka eliphephile nelihlakaniphile le-back-pressure high-temperature, isihloli sokushisa se-HST-H3
Izinyathelo zokuhlola: Faka ngokucophelela i-acetic acid engu-4% esikhwameni se-retort ibe izingxenye ezimbili kwezintathu zevolumu. Qaphela ukuthi ungangcolisi uphawu, ukuze ungaphazamisi ukushesha kokuvala. Ngemva kokugcwalisa, vala izikhwama zokupheka nge-HST-H3, bese ulungisa isamba samasampuli angu-12. Lapho uvala, umoya osesikhwameni kufanele uphele ngangokunokwenzeka ukuze uvimbele ukwanda komoya ngesikhathi sokupheka ekuthinteni imiphumela yokuhlolwa.
Faka isampula elivaliwe ebhodweni lokupheka ukuze uqale ukuhlola. Beka izinga lokushisa lokupheka libe ngu-121°C, isikhathi sokupheka sibe yimizuzu engu-40, upheke amasampula angu-6 bese ubilisa amasampula angu-6. Ngesikhathi sokuhlolwa kokupheka, qaphela kakhulu izinguquko zomoya kanye nezinga lokushisa ebhodweni lokupheka ukuze uqinisekise ukuthi izinga lokushisa nokucindezela kugcinwa ngaphakathi kwebanga elimisiwe.
Ngemva kokuba ukuhlolwa sekuqediwe, kuphole kuya ekamelweni lokushisa, yikhiphe futhi ubheke ukuthi azikho yini izikhwama eziphukile, imibimbi, i-delamination, njll. Ngemva kokuhlolwa, izindawo ezingaphezulu zamasampuli angu-1# kanye no-2# zazibushelelezi ngemva kokupheka futhi kwakungekho. delamination. Ubuso besampula engu-3# bebungasheleli kakhulu ngemva kokupheka, futhi imiphetho ibisontekile ukuya kumazinga ahlukahlukene.
2). Ukuqhathaniswa kwezakhiwo eziqinile
Thatha izikhwama zokupakisha ngaphambi nangemuva kokupheka, sika amasampula angunxande angu-5 angu-15mm×150mm ohlangothini oluphambanayo no-150mm ohlangothini lwe-longitudinal, futhi uwabeke endaweni amahora angu-4 endaweni engu-23±2℃ kanye no-50±10%RH. Umshini ohlakaniphile we-XLW (PC) wokuhlola i-electronic tensile wasetshenziselwa ukuhlola amandla okuphuka kanye nobude ngesikhathi sekhefu ngaphansi kwesimo esingu-200mm/min.
3). Ukuhlolwa kwekhasi
Ngokwendlela A ye-GB 8808-1988 “Indlela Yokuhlola Ipeli Yezinto Ezithambile Ezihlanganisiwe Zepulasitiki”, sika isampula ngobubanzi obungu-15±0.1mm nobude obungu-150mm. Thatha amasampula angu-5 lilinye uziqondise ezivundlile nezime mpo. Khipha kusengaphambili ungqimba oluyinhlanganisela ohlangothini lobude besampula, ulilayishe emshinini wokuhlola we-elekthronikhi ohlakaniphile we-XLW (PC), bese uhlola amandla okuxebuka ku-300mm/min.
4). Ukuhlolwa kwamandla okuvalwa kokushisa
Ngokuya nge-GB/T 2358-1998 “Indlela Yokuhlola Yamandla Okuvalwa Kokushisa Kwezikhwama Zokufaka Ifilimu Yepulasitiki”, sika isampula elibanzi elingu-15mm engxenyeni yokuvala ukushisa kwesampula, uyivule ku-180°, bese ubamba iziphetho zombili zesampula i-XLW (PC) ehlakaniphile Emshinini wokuhlola we-electronic tensile, umthwalo omkhulu uhlolwa ngesivinini esingu-300mm/min, futhi izinga lokwehla libalwa kusetshenziswa ifomula ye-dielectric ukumelana nokushisa okuphezulu ku-GB/T 10004-2008.
Fingqa
Ukudla okupakishwayo okumelana nokuphindiselwa kuya ngokuya kuthandwa ngabathengi ngenxa yokuthi kulula ukudla nokugcina. Ukuze ulondoloze ngempumelelo ikhwalithi yokuqukethwe futhi uvimbele ukudla ekuwohlokeni, zonke izinyathelo zenqubo yokukhiqiza izikhwama ezibuyisela izinga lokushisa eliphezulu zidinga ukugadwa ngokuqinile futhi kulawulwe ngokunengqondo.
1. Izikhwama zokupheka eziphikisana nokushisa okuphezulu kufanele zenziwe ngezinto ezifanele ngokusekelwe kokuqukethwe kanye nenqubo yokukhiqiza. Isibonelo, i-CPP ivame ukukhethwa njengongqimba olungaphakathi lokuvala lwezikhwama zokupheka ezimelana nokushisa okuphezulu; lapho izikhwama zokupakisha eziqukethe izendlalelo ze-AL zisetshenziselwa ukupakisha okuqukethwe kwe-asidi ne-alkali, ungqimba oluyinhlanganisela ye-PA kufanele lwengezwe phakathi kwe-AL ne-CPP ukuze kwandiswe ukumelana ne-asidi kanye nokungena kwe-alkali; ungqimba ngalunye oluyinhlanganisela Ukuncipha kokushisa kufanele kuhambisane noma kufane ukuze kugwenywe ukusonteka noma ngisho nokuncipha kwempahla ngemva kokupheka ngenxa yokungafani kahle kwezinto zokunciphisa ukushisa.
2. Lawula ngokunengqondo inqubo eyinhlanganisela. Izikhwama ezikwazi ukumelana nokushisa okuphezulu zisebenzisa indlela eyomile yokuhlanganisa. Enkambweni yokukhiqiza ifilimu ye-retort, kuyadingeka ukukhetha i-adhesive efanele kanye nenqubo enhle yokunamathisela, futhi ulawule ngokunengqondo izimo zokuphulukisa ukuze uqinisekise ukuthi i-ejenti eyinhloko ye-adhesive kanye ne-ejenti yokwelapha isabela ngokugcwele.
3. Ukumelana nokushisa okuphakathi kwe-high-temperature kuyinkqubo enzima kakhulu ohlelweni lokupakisha izikhwama zokubuyisela izinga lokushisa eliphezulu. Ukuze kuncishiswe ukuvela kwezinkinga zekhwalithi yeqoqo, izikhwama zokubuyisela izinga lokushisa eliphezulu kufanele zihlolwe futhi zihlolwe ngokusekelwe ezimweni zangempela zokukhiqiza ngaphambi kokusetshenziswa nangesikhathi sokukhiqiza. Hlola ukuthi ukubukeka kwephakeji ngemva kokupheka kuyisicaba, kushwabene, kunamabhamuza, kukhubazekile, ukuthi kukhona yini i-delamination noma ukuvuza, ukuthi izinga lokwehla kwezinto ezibonakalayo (izakhiwo eziqinile, amandla ekhasi, amandla okuvala ukushisa) liyahlangabezana nezidingo, njll.
Isikhathi sokuthumela: Jan-18-2024
