Ifilimu yokupakisha yepulasitikiingenye yezinto ezisemqoka zokupakisha eziguquguqukayo. Kunezinhlobo eziningi zefilimu yokupakisha yepulasitiki enezici ezihlukene, futhi ukusetshenziswa kwazo kuyahlukahluka ngokuya ngezakhiwo ezihlukene zefilimu yokupakisha.
Ifilimu yokupakisha inokuqina okuhle, ukumelana nomswakama, nokusebenza kokuvalwa kokushisa, futhi isetshenziswa kabanzi: Ifilimu yokupakisha ye-PVDC ifanele ukupakisha ukudla futhi ingagcina ubusha isikhathi eside; Futhi ifilimu yokupakisha ye-PVA encibilikayo emanzini ingasetshenziswa ngaphandle kokuvula futhi ifakwe ngokuqondile emanzini; Ifilimu yokupakisha ye-PC ayinaphunga, ayinabo ubuthi, isobala futhi icwebezela njengephepha lengilazi, futhi ingashiswa isitimu futhi inzalo ngaphansi kwezinga lokushisa eliphezulu nokucindezela.
Eminyakeni yamuva nje, isidingo somhlaba wonke sefilimu yokupakisha yepulasitiki sibonise ukuthambekela okuqhubekayo okukhuphukayo, ikakhulukazi njengoba amafomu okupakisha eqhubeka nokusuka ekufakweni okuqinile kuya emaphaketheni athambile. Lokhu futhi kuyisici esiyinhloko esiqhuba ukukhula kwesidingo sokupakisha izinto zefilimu. Ngakho-ke, uyazazi izinhlobo nokusetshenziswa kwefilimu yokupakisha yepulasitiki? Lesi sihloko sizokwethula ngokuyinhloko izakhiwo kanye nokusetshenziswa kwamafilimu amaningana okupakisha epulasitiki
1. Ifilimu yokupakisha ye-polyethylene
Ifilimu yokupakisha ye-PE iyifilimu yokupakisha yepulasitiki esetshenziswa kabanzi, ebalwa ngaphezu kwama-40% okusetshenziswa okuphelele kwefilimu yokupakisha yepulasitiki. Nakuba ifilimu yokupakisha ye-PE ingalungile ngokubukeka, amandla, njll., inokuqina okuhle, ukumelana nomswakama, nokusebenza kokuvalwa kokushisa, futhi kulula ukucubungula nokwenza ngentengo ephansi, ngakho-ke isetshenziswa kabanzi.
a. Ifilimu yokupakisha ye-polyethylene ephansi.
Ifilimu yokupakisha ye-LDPE ikhiqizwa ikakhulukazi yi-extrusion blow molding nezindlela ze-T-mold. Ifilimu yokupakisha eguquguqukayo nesobala engenabuthi futhi engenaphunga, enogqinsi ngokuvamile oluphakathi kuka-0.02-0.1mm. Inokumelana kahle namanzi, ukumelana nomswakama, ukumelana nesomiso, nokuzinza kwamakhemikhali. Inani elikhulu lamaphakheji ajwayelekile avikela umswakama kanye nokupakishwa kokudla okuqandisiwe okusetshenziselwa ukudla, imithi, izidingo zansuku zonke, kanye nemikhiqizo yensimbi. Kodwa ezintweni ezinokumunca umswakama ophezulu kanye nezidingo zokumelana nomswakama ophezulu, amafilimu amaphakethe angcono amelana nomswakama kanye namafilimu okupakisha ayinhlanganisela kudingeka asetshenziselwe ukupakisha. Ifilimu yokupakisha ye-LDPE inokungena komoya okuphezulu, ayigcini iphunga elimnandi, nokungamelani kahle nowoyela, okuyenza ingafaneleki ukupakishwa ukudla okufakwe i-oxid, okunambitheka, nokunamafutha kalula. Kodwa ukuphefumula kwayo kuyenza ilungele ukupakishwa kabusha kwezinto ezintsha njengezithelo nemifino. Ifilimu yokupakisha ye-LDPE inokunamathela okuhle okushisayo kanye nezindawo zokuvala ukushisa okushisa okuphansi, ngakho-ke ivame ukusetshenziswa njengesendlalelo sokunamathisela kanye nosendlalelo sokuvala ukushisa kwamafilimu okupakisha ayinhlanganisela. Kodwa-ke, ngenxa yokumelana kwayo nokushisa okumpofu, ayikwazi ukusetshenziswa njengesendlalelo sokuvala ukushisa kwezikhwama zokupheka.
b. Ifilimu yokupakisha ye-polyethylene ephezulu. Ifilimu yokupakisha ye-HDPE ifilimu yokupakisha eqinile ebonakala kancane ebonakala imhlophe njenge-milky kanye nokucwebezela okungekuhle. Ifilimu yokupakisha ye-HDPE inamandla angcono okuqina, ukumelana nomswakama, ukumelana nokushisa, ukumelana nowoyela, nokuzinza kwamakhemikhali kunefilimu yokupakisha ye-LDPE. Kungase futhi kuvalwe ukushisa, kodwa ukubonakala kwayo akukuhle njenge-LDPE. I-HDPE ingenziwa ibe yifilimu yokupakisha ezacile enogqinsi luka-0.01mm. Ukubukeka kwayo kufana kakhulu nephepha likasilika elincanyana, futhi lizwakala likhululekile uma ulithinta, elaziwa nangokuthi iphepha njengefilimu. Inamandla amahle, ukuqina, nokuvuleleka. Ukuthuthukisa iphepha njengokuzwakala nokunciphisa izindleko, inani elincane le-calcium carbonate engasindi lingangezwa. Ifilimu yephepha ye-HDPE isetshenziswa kakhulu ukwenza izikhwama zokuthenga ezinhlobonhlobo, izikhwama zikadoti, izikhwama zokupakisha izithelo, kanye nezikhwama ezihlukahlukene zokupakisha ukudla. Ngenxa yokungangeni kahle komoya kanye nokuntuleka kokugcinwa kwephunga elimnandi, isikhathi sokugcina ukudla okupakishiwe asiside. Ngaphezu kwalokho, ifilimu yokupakisha ye-HDPE ingasetshenziswa njengesendlalelo sokuvala ukushisa kwezikhwama zokupheka ngenxa yokumelana nokushisa kwayo okuhle.
c. Ifilimu yokupakisha ye-linear low-density polyethylene.
Ifilimu yokupakisha ye-LLDPE iyifilimu yokupakisha esanda kuthuthukiswa ye-polyethylene. Uma kuqhathaniswa nefilimu yokupakisha ye-LDPE, ifilimu yokupakisha ye-LLDPE inamandla aphezulu okuqinile nomthelela, amandla okudabula, nokumelana nokubhoboza. Ngamandla afanayo nokusebenza njengefilimu yokupakisha ye-LDPE, ubukhulu befilimu yokupakisha ye-LLDPE bungancishiswa bube ngu-20-25% wefilimu yokupakisha ye-LDPE, ngaleyo ndlela kwehle kakhulu izindleko. Ngisho noma isetshenziswa njengesikhwama sokupakisha esindayo, ukujiya kwaso kudinga kuphela u-0.1mm ukuhlangabezana nezidingo, okungangena esikhundleni se-polymer high-density polyethylene. Ngakho-ke, i-LLDPE ifaneleka kakhulu ukupakishwa kwezidingo zansuku zonke, ukupakisha ukudla okufriziwe, futhi isetshenziswa kabanzi njengezikhwama zokufaka ezisindayo nezikhwama zikadoti.
2. Ifilimu yokupakisha ye-Polypropylene
Ifilimu yokupakisha ye-PP ihlukaniswe yaba ifilimu yokupakisha enganwetshiwe kanye nefilimu yokupakisha eyelulwe nge-biaxially. Izinhlobo ezimbili zefilimu yokupakisha zinomehluko omkhulu ekusebenzeni, ngakho-ke kufanele zithathwe njengezinhlobo ezimbili ezihlukene zefilimu yokupakisha.
1) Ifilimu yokupakisha ye-polypropylene enganwetshiwe.
Ifilimu yokupakisha ye-polypropylene enganwetshiwe ihlanganisa ifilimu yokupakisha ye-polypropylene (IPP) ekhiqizwe indlela yokubumba i-extrusion blow kanye nefilimu yokupakisha ye-polypropylene ekhishwe (CPP) ekhiqizwe indlela ye-T-mold. Ukungafihli nokuqina kwefilimu yokupakisha ye-PP kubi; Futhi inokucaca okuphezulu kanye nokuqina okuhle. Ifilimu yokupakisha ye-CPP inokucaca kanye nokucwebezela okungcono, futhi ukubukeka kwayo kufana nokwephepha lengilazi. Uma kuqhathaniswa nefilimu yokupakisha ye-PE, ifilimu yokupakisha ye-polypropylene enganwetshiwe inokucaca okungcono, ukucwebezela, ukumelana nomswakama, ukumelana nokushisa, nokumelana nowoyela; Amandla aphezulu emishini, ukumelana okuhle kwezinyembezi, ukumelana nokubhoboza, nokumelana nokugqoka; Futhi ayinabo ubuthi futhi ayinaphunga. Ngakho-ke, isetshenziselwa kakhulu ukupakisha ukudla, imithi, izindwangu nezinye izinto. Kodwa ayinakho ukumelana nesomiso futhi iba brittle ku-0-10 ℃, ngakho ayikwazi ukusetshenziselwa ukupakisha ukudla okuqandisiwe. Ifilimu yokupakisha ye-polypropylene enganwetshiwe inokumelana nokushisa okuphezulu nokusebenza okuhle kokuvalwa kokushisa, ngakho-ke ivame ukusetshenziswa njengesendlalelo sokuvala ukushisa kwezikhwama zokupheka.
2) Ifilimu yokupakisha ye-polypropylene egxile ku-Biaxially (BOPP).
Uma kuqhathaniswa nefilimu yokupakisha ye-polypropylene enganwetshiwe, ifilimu yokupakisha ye-BOPP ngokuyinhloko inezici ezilandelayo: ① Ukukhanya okuthuthukisiwe nokucwebezela, uma kuqhathaniswa nephepha lengilazi; ② Amandla emishini ayanda, kodwa ubude buyancipha; ③ Ukumelana okubandayo okuthuthukisiwe futhi akukho brittleness ngisho nalapho kusetshenziswa -30~-50 ℃; ④ Ukungeneka komswakamo kanye nokungena komoya kuncishiswa cishe ngohhafu, kanye nokungena komhwamuko wemvelo nakho kuyehliswa kumazinga ahlukahlukene; ⑤ Ifilimu eyodwa ayikwazi ukuvalwa ngokushisa ngokuqondile, kodwa ukusebenza kwayo kokuvalwa kokushisa kungathuthukiswa ngokunamathisela okunamathelayo namanye amafilimu okupakisha epulasitiki.
Ifilimu yokupakisha ye-BOPP iwuhlobo olusha lwefilimu yokupakisha eyenzelwe ukufaka esikhundleni sephepha lengilazi. Inezici zamandla aphezulu emishini, ukuqina okuhle, ukucaca okuhle nokucwebezela. Intengo yayo icishe ibe ngama-20% ngaphansi kwephepha lengilazi. Ngakho-ke selishintshile noma lashintsha ingxenye yephepha lengilazi emaphaketheni okudla, imithi, ugwayi, izindwangu neminye imikhiqizo. Kodwa ukunwebeka kwayo kuphezulu futhi akukwazi ukusetshenziselwa ukusonta uswidi. Ifilimu yokupakisha ye-BOPP isetshenziswa kabanzi njengento eyisisekelo yamafilimu okupakisha ayinhlanganisela. Amafilimu okupakisha ayinhlanganisela enziwe nge-aluminium foil namanye amafilimu okupakisha epulasitiki angahlangabezana nezidingo zokupakisha zezinto ezahlukahlukene futhi asetshenziswe kabanzi.
3. Ifilimu yokupakisha ye-Polyvinyl chloride
Ifilimu yokupakisha ye-PVC ihlukaniswe yaba ifilimu yokupakisha ethambile nefilimu yokupakisha eqinile. Ukwelulwa, ukumelana nezinyembezi, nokumelana okubandayo kwefilimu yokupakisha ye-PVC ethambile kuhle; Kulula ukuphrinta nokushisa uphawu; Ingenziwa ibe yifilimu yokupakisha esobala. Ngenxa yephunga lama-plasticizers kanye nokufuduka kwama-plasticizers, ifilimu ethambile ye-PVC yokupakisha ngokuvamile ayifanele ukupakishwa kokudla. Kodwa ifilimu yokupakisha ethambile ye-PVC ekhiqizwa indlela yangaphakathi yokwenza ipulasitiki ingasetshenziselwa ukupakisha ukudla. Ngokuvamile, ifilimu yokupakisha eguquguqukayo ye-PVC isetshenziselwa ikakhulukazi imikhiqizo yezimboni kanye nokupakishwa okungekona ukudla.
Ifilimu yokupakisha eqinile ye-PVC, eyaziwa kakhulu njengephepha lengilazi le-PVC. Ukucaca okuphezulu, ukuqina, ukuqina okuhle, nokusonteka okuzinzile; Inokuqina komoya okuhle, igcina amakha, futhi imelana kahle nomswakama; Ukusebenza okuhle kakhulu kokuphrinta, kungakhiqiza ifilimu yokupakisha engenabuthi. Isetshenziselwa kakhulu ukupakishwa okusontekile kwamaswidi, ukupakishwa kwezindwangu nezingubo, kanye nefilimu yangaphandle yokupakisha kagwayi namabhokisi okupakisha okudla. Kodwa-ke, i-PVC eqinile inokumelana nokubanda okubi futhi iba brittle emazingeni okushisa aphansi, iyenze ingafaneleki njengempahla yokupakisha yokudla okufriziwe.
4. Ifilimu yokupakisha ye-Polystyrene
Ifilimu yokupakisha ye-PS inokucaca okuphezulu nokucwebezela, ukubukeka okuhle, nokusebenza okuhle kokuphrinta; Ukumuncwa kwamanzi aphansi kanye nokungena okuphezulu kwamagesi kanye nomhwamuko wamanzi. Ifilimu yokupakisha ye-polystyrene engaluliwe iqinile futhi iyaphuka, inokunwebeka okuphansi, amandla aqinile, nokumelana nomthelela, ngakho-ke ayivamisile ukusetshenziswa njengento yokupakisha eguquguqukayo. Izinto zokupakisha eziyinhloko ezisetshenziswayo yifilimu yokupakisha ye-biaxially oriented polystyrene (BOPS) kanye nefilimu yokufaka emunca ukushisa.
Ifilimu yokupakisha ye-BOPS ekhiqizwe ukunwebeka kwe-biaxial izithuthukise kakhulu izakhiwo zayo ezingokomzimba nezomshini, ikakhulukazi ubude, amandla omthelela, nokuqina, kuyilapho lisagcina ukubonakala kwayo kwasekuqaleni kanye nokucwebezela. Ukuphefumula okuhle kwefilimu yokupakisha ye-BOPS kuyenza ifaneleke kakhulu ukupakisha ukudla okusha njengezithelo, imifino, inyama nenhlanzi, kanye nezimbali.
5. Ifilimu yokupakisha ye-Polyvinylidene chloride
Ifilimu yokupakisha ye-PVDC iyifilimu yokupakisha eguquguqukayo, esobala, futhi ephezulu. Inokumelana nomswakama, ukucinana komoya, kanye nezakhiwo zokugcina iphunga; Futhi inokumelana okuhle kakhulu nama-asidi aqinile, ama-alkali aqinile, amakhemikhali, namafutha; Ifilimu yokupakisha ye-PVDC enganwetshiwe ingavalwa ngokushisa, okulungele kakhulu ukupakisha ukudla futhi ingagcina ukunambitheka kokudla kungashintshiwe isikhathi eside.
Nakuba ifilimu yokupakisha ye-PVDC inamandla amahle emishini, ukuqina kwayo akulungile, ithambile kakhulu futhi ijwayele ukunamathela, futhi ukusebenza kwayo kubi. Ngaphezu kwalokho, i-PVDC inobucwebe obuqinile, futhi ifilimu yayo yokupakisha ijwayele ukubhobozwa noma ama-microcracks, kuhlanganiswe nenani layo eliphezulu. Ngakho-ke, ifilimu yokupakisha ye-PVDC ayivamisile ukusetshenziswa efomini elilodwa lefilimu futhi isetshenziselwa kakhulu ukwenza ifilimu yokupakisha eyinhlanganisela.
6. Ifilimu yokupakisha ye-ethylene vinyl acetate copolymer
Ukusebenza kwefilimu yokupakisha ye-EVA kuhlobene nokuqukethwe kwe-vinyl acetate (VA). Ukuphakama kokuqukethwe kwe-VA, kuba ngcono ukunwebeka, ukumelana nokuqhekeka kwengcindezi, ukumelana nezinga lokushisa eliphansi, nokusebenza kokuvala ukushisa kwefilimu yokupakisha. Uma okuqukethwe kwe-VA kufinyelela ku-15%~20%, ukusebenza kwefilimu yokupakisha kuseduze nalokho kwefilimu yokupakisha ye-PVC ethambile. Ukuncipha kokuqukethwe kwe-VA, ifilimu yokupakisha iyancipha, futhi ukusebenza kwayo kuseduze nefilimu yokupakisha ye-LDPE. Okuqukethwe kwe-VA ngokujwayelekile ifilimu yokupakisha ye-EVA ngu-10% ~ 20%.
Ifilimu yokupakisha ye-EVA inezindawo ezinhle zokuvala ukushisa okunezinga lokushisa eliphansi kanye nezindawo zokuvala ezifakiwe, okuyenza ibe ifilimu yokuvala enhle kakhulu futhi evame ukusetshenziswa njengesendlalelo sokuvala ukushisa kumafilimu okupakisha ayinhlanganisela. Ukumelana nokushisa kwefilimu yokupakisha ye-EVA kubi, nezinga lokushisa lokusetshenziswa elingu-60 ℃. Ukungangeni kwayo umoya kubi, futhi ijwayele ukunamathela nephunga. Ngakho-ke ifilimu yokupakisha yongqimba olulodwa ye-EVA ngokuvamile ayisetshenziselwa ukupakisha ukudla.
7. Ifilimu yokupakisha utshwala ye-Polyvinyl
Ifilimu yokupakisha ye-PVA ihlukaniswe yaba ifilimu yokupakisha ukumelana namanzi kanye nefilimu yokupakisha encibilika emanzini. Ifilimu yokupakisha ukumelana namanzi yenziwe nge-PVA ene-polymerization degree engaphezu kuka-1000 kanye ne-saponification ephelele. Ifilimu yokupakisha encibilika emanzini yenziwe nge-PVA efakwe kancane nge-polymerization degree. Ifilimu yokupakisha eyinhloko esetshenzisiwe ifilimu yokupakisha ye-PVA engangeni manzi.
Ifilimu yokupakisha ye-PVA inokucaca okuhle nokucwebezela, akulula ukuqongelela ugesi omile, akulula ukukhanga uthuli, futhi inokusebenza okuhle kokuphrinta. Inokuqina komoya kanye nokugcinwa kwephunga endaweni eyomile, futhi imelana kahle nowoyela; Inamandla amahle emishini, ukuqina, nokumelana nokuqhekeka kwengcindezi; Ingafakwa uphawu lokushisa; Ifilimu yokupakisha ye-PVA inokufinyeleleka okuphezulu komswakama, ukumuncwa okuqinile, nosayizi ongazinzile. Ngakho-ke, i-polyvinylidene chloride coating, eyaziwa nangokuthi i-K coating, ivame ukusetshenziswa. Le filimu yokupakisha ehlanganisiwe ye-PVA ingagcina umoya omuhle kakhulu, ukugcinwa kwephunga elimnandi, nokumelana nomswakama ngisho nangaphansi komswakama ophezulu, ikwenze ifaneleke kakhulu ukupakisha ukudla. Ifilimu yokupakisha ye-PVA ivame ukusetshenziswa njengesendlalelo sokuvimbela ifilimu yokupakisha eyinhlanganisela, esetshenziselwa kakhulu ukupakisha ukudla okusheshayo, imikhiqizo yenyama, imikhiqizo kakhilimu nokunye ukudla. Ifilimu eyodwa ye-PVA nayo isetshenziselwa kabanzi ukupakisha izindwangu nezingubo.
Ifilimu yokupakisha ye-PVA encibilikayo emanzini ingasetshenziselwa ukukala ukupakishwa kwemikhiqizo yamakhemikhali efana nezibulala-magciwane, okokuhlanza, ama-bleaching agents, odayi, izibulala-zinambuzane, nezikhwama zokuwasha izingubo zesiguli. Ingafakwa ngokuqondile emanzini ngaphandle kokuvula.
8. Ifilimu yokupakisha inayiloni
Ifilimu yokupakisha inayiloni ikakhulukazi ihlanganisa izinhlobo ezimbili: ifilimu yokupakisha eyelulwe nge-biaxially kanye nefilimu yokupakisha enganwetshiwe, phakathi kwayo ifilimu yokupakisha enayiloni enwetshiwe ye-biaxially (BOPA) esetshenziswa kakhulu. Ifilimu yokupakisha inayiloni engaluliwe inobude obuvelele futhi isetshenziselwa ikakhulukazi ukupakisha kwe-vacuum ejulile.
Ifilimu yokupakisha inayiloni ifilimu yokupakisha enzima kakhulu engenabo ubuthi, engenaphunga, esobala, ecwebezelayo, engajwayele ukunqwabelana ugesi omile, futhi inokusebenza okuhle kokuphrinta. Inamandla amakhulu emishini, amandla aphindwe kathathu efilimu yokupakisha ye-PE, kanye nokumelana okuhle kakhulu nokugqokwa nokumelana nokubhoboza. Ifilimu yokupakisha inayiloni inokumelana nokushisa okuhle, ukumelana nokujuluka, nokumelana nowoyela, kodwa kunzima ukuvala uphawu. Ifilimu yokupakisha inayiloni inokuqina komoya okuhle endaweni eyomile, kodwa inokufinyeleleka okuphezulu komswakama kanye nokumunca amanzi okuqinile. Ezindaweni ezinomswakama ophezulu, ukuzinza kwe-dimensional kubi futhi ukungangeni komoya kuyehla kakhulu. Ngakho-ke, i-polyvinylidene chloride coating (KNY) noma inhlanganisela enefilimu yokupakisha ye-PE ivame ukusetshenziselwa ukuthuthukisa ukumelana kwayo namanzi, ukumelana nomswakama, nokusebenza kokuvala ukushisa. Le filimu yokupakisha eyinhlanganisela ye-NY/PE isetshenziswa kakhulu ekufakweni kokudla. Ukupakishwa kwenayiloni kusetshenziswa kabanzi ekukhiqizeni amafilimu okupakisha ayinhlanganisela futhi nanjenge-substrate yamafilimu okupakisha ane-aluminium plated.
Ifilimu yokupakisha inayiloni kanye nefilimu yalo yokupakisha eyinhlanganisela isetshenziselwa kakhulu ukupakisha ukudla okunamafutha, ukudla okuvamile, ukudla okuqandisiwe, nokudla okushunqisiwe. Ifilimu yokupakisha inayiloni enganwetshiwe, ngenxa yezinga layo eliphezulu lokwelula, ingasetshenziselwa ukupakisha i-vacuum yenyama enongiwe, inyama yamathambo amaningi nokunye ukudla.
9. I-ethylene vinyl alcohol copolymerukupakisha ifilimu
Ifilimu yokupakisha ye-EVAL iwuhlobo olusha lwefilimu yokupakisha yesithiyo esiphezulu ethuthukiswe eminyakeni yakamuva. Inokukhanya okuhle, isithiyo se-oxygen, igcina amakha, futhi imelana nowoyela. Kodwa i-hygroscopicity yayo inamandla, okunciphisa izakhiwo zayo zokuvimbela ngemva kokumunca umswakama.
Ifilimu yokupakisha ye-EVAL ivamise ukwenziwa ifilimu yokupakisha eyinhlanganisela kanye nezinto ezimelana nomswakama, ezisetshenziselwa ukupakisha imikhiqizo yenyama efana namasoseji, i-ham, nokudla okusheshayo. Ifilimu eyodwa ye-EVAL ingase isetshenziselwe ukupakisha imikhiqizo yefayibha kanye nemikhiqizo yoboya.
10. Ifilimu yokupakisha ye-polyester yenziwe ngefilimu yokupakisha ye-biaxially oriented polyester (BOPET).
Ifilimu yokupakisha ye-PET iwuhlobo lwefilimu yokupakisha esebenza kahle. Inokukhanya okuhle nokucwebezela; Inokuqina komoya okuhle futhi igcina iphunga; Ukumelana nomswakama okumaphakathi, nokuncipha kokungena komswakama emazingeni okushisa aphansi. Izinto ezisebenza ngomshini zefilimu yokupakisha ye-PET zinhle kakhulu, futhi amandla nokuqina kwayo zihamba phambili kuwo wonke amapulasitiki ashisayo. Amandla ayo aqinile namandla omthelela aphezulu kakhulu kunalawo efilimu yokupakisha evamile; Futhi inokuqina okuhle nosayizi ozinzile, ofanele ukucutshungulwa kwesibili njengokuphrinta nezikhwama zephepha. Ifilimu yokupakisha ye-PET nayo inokumelana okuhle kakhulu nokushisa nokubanda, kanye nokumelana okuhle kwamakhemikhali namafutha. Kodwa ayimelani ne-alkali enamandla; Kulula ukuphatha ugesi omile, ayikho indlela efanele yokulwa ne-static okwamanje, ngakho-ke kufanele kuqashelwe lapho kupakishwa izinto eziyimpuphu.
Ukuvalwa kokushisa kwefilimu yokupakisha ye-PET kunzima kakhulu futhi okwamanje kuyabiza, ngakho-ke akuvamile ukusetshenziswa ngendlela yefilimu eyodwa. Iningi lazo liyinhlanganisela nefilimu yokupakisha ye-PE noma ye-PP enezakhiwo ezinhle zokuvala ukushisa noma ehlanganiswe ne-polyvinylidene chloride. Le filimu yokupakisha eyinhlanganisela esuselwe kufilimu yokupakisha ye-PET iyinto efanelekile yokusebenza kokupakisha ngomshini futhi isetshenziswa kakhulu ekufakweni kokudla okufana nokushisisa, ukubhaka, kanye nokuqandisa.
11. Ifilimu yokupakisha yePolycarbonate
Ifilimu yokupakisha ye-PC ayinaphunga futhi ayinabo ubuthi, isobala futhi icwebezela njengephepha lengilazi, futhi amandla ayo afana nefilimu yokupakisha ye-PET nefilimu yokupakisha ye-BONY, ikakhulukazi ukumelana nomthelela wayo ovelele. Ifilimu yokupakisha ye-PC inokugcina iphunga elimnandi, ukuqina komoya okuhle nokumelana nomswakama, nokumelana okuhle kwe-UV. Inokumelana kahle nowoyela; Iphinde ibe nokushisa okuhle kanye nokumelana nokubanda. Ingafakwa ngesitimu futhi inzalo ngaphansi kwezinga lokushisa eliphezulu kanye nokucindezela okukhulu; Ukumelana nezinga lokushisa eliphansi nokumelana neqhwa kungcono kunefilimu yokupakisha ye-PET. Kodwa ukusebenza kwayo kokuvala ukushisa kubi.
Ifilimu yokupakisha ye-PC iyinto ekahle yokupakisha ukudla, engasetshenziselwa ukupakisha ukudla okushubile, okuqandisiwe, nokunambitheka. Njengamanje, ngenxa yentengo yayo ephezulu, isetshenziselwa ikakhulukazi ukupakisha amaphilisi emithi kanye nokupakishwa okuyinyumba.
12. Ifilimu yokupakisha ye-acetate cellulose
Ifilimu yokupakisha ye-CA isobala, iyacwebezela, futhi inobuso obushelelezi. Iqinile, izinzile ngosayizi, akulula ukunqwabelanisa ugesi, futhi inokucutshungulwa okuhle; Kulula ukubopha futhi inokuphrinta okuhle. Futhi inokumelana namanzi, ukumelana nokugoqa, nokuqina. Ukungena komoya nokungena komswakama wefilimu yokupakisha ye-CA kuphakeme kakhulu, okungase kusetshenziselwe ukupakisha “ukuphefumula” kwemifino, izithelo, nezinye izinto.
Ifilimu yokupakisha ye-CA ivamise ukusetshenziswa njengongqimba lwangaphandle lwefilimu yokupakisha eyinhlanganisela ngenxa yokubukeka kwayo okuhle nokulula kokuphrinta. Ifilimu yayo yokupakisha eyinhlanganisela isetshenziswa kakhulu ukupakisha izidakamizwa, ukudla, izimonyo nezinye izinto.
13. I-polymer eboshiwe ye-Ionicukupakisha ifilimu roll
Ukungafihli nokucwebezela kwefilimu yokupakisha ye-polymer ehlanganisiwe ingcono kunaleyo yefilimu ye-PE, futhi ayinabo ubuthi. Inokuqina komoya okuhle, ukuthamba, ukuqina, ukumelana nokubhoboza, kanye nokungazweli uwoyela. Ifanele ukupakishwa kwezinto ezingu-angular kanye nokushisa shwabanisa ukupakishwa kokudla. Ukusebenza kwayo kokuvalwa kwezinga lokushisa eliphansi kuhle, izinga lokushisa lokuvalwa kokushisa libanzi, futhi ukusebenza kokuvalwa kokushisa kusekuhle ngisho noma kufakwe izinto ezifakiwe, ngakho-ke kuvame ukusetshenziswa njengesendlalelo sokuvalwa kokushisa kwamafilimu okupakisha ayinhlanganisela. Ngaphezu kwalokho, ama-polymers ahlanganiswe ne-ion ane-adhesion enhle eshisayo futhi angahlanganiswa namanye amapulasitiki ukuze akhiqize amafilimu okupakisha ayinhlanganisela.
Isikhathi sokuthumela: Feb-11-2025