E le ho lelefatsa bophelo ba sethala sa lintho tse kang lijo le lithethefatsi, tse ngatathepa ea ho pakabakeng sa lijo le lithethefatsi matsatsing ana sebelisa lifilimi tse nang le likarolo tse ngata tsa ho paka. Hajoale, ho na le likarolo tse peli, tse tharo, tse hlano, tse supileng, tse robong, esita le tse leshome le motso o mong tsa lisebelisoa tsa ho paka tse kopaneng. Multi layer packaging filimi ke filimi e tšesaane e entsoeng ka ho ntša lisebelisoa tse tala tsa polasetiki ka har'a liteishene tse ngata ka nako e le 'ngoe ho tsoa mofuteng o le mong, o ka eketsang melemo ea lisebelisoa tse fapaneng.
Multi layerho paka filimi rollhaholo-holo li entsoe ka motsoako oa polyolefin. Hona joale, mekhoa e tloaelehileng e sebelisoang e kenyelletsa: polyethylene / polyethylene, polyethylene ethylene vinyl acetate copolymer / polypropylene, LDPE / adhesive layer / EVOH / adhesive layer / LDPE, LDPE / adhesive layer / EVH / EVOH / EVOH / sekhomaretsi lera / LDPE. Botenya ba lera ka 'ngoe bo ka fetoloa ka theknoloji ea extrusion. Ka ho fetola botenya ba mokoallo oa mokoallo le ho sebelisa mefuta e sa tšoaneng ea lithibelo, lifilimi tse tenyetsehang tse nang le thepa e fapaneng ea thibelo li ka etsoa. Thepa ea ho tiisa mocheso le eona e ka nkeloa sebaka ka mokhoa o bonolo le ho lokisoa ho fihlela litlhoko tsa liphutheloana tse fapaneng. Motsoako ona oa liphutheloana tse ngata le tse nang le mesebetsi e mengata ke tataiso e ka sehloohong bakeng sa nts'etsopele ea lisebelisoa tsa filimi tsa ho paka nakong e tlang.
Multi layer ackaging composite filimi sebopeho
Multi layer packaging composite film, ho sa tsotelehe palo ea layers, ka kakaretso e arotsoe ka lera la motheo, lera le sebetsang, le lera la sekhomaretsi ho latela ts'ebetso ea karolo ka 'ngoe ea filimi.
Boemo ba motheo
Ka kakaretso, likarolo tsa kahare le kantle tsa lifilimi tse kopaneng li lokela ho ba le thepa e ntle ea 'mele le ea mochini, ho etsa ts'ebetso ea ts'ebetso, le lera le tiisang mocheso. E boetse e hloka ho ba le ts'ebetso e ntle ea ho koala mocheso le ts'ebetso e chesang ea ho cheselletsa, e batlang e le theko e tlase, e na le ts'ehetso e ntle le litlamorao tsa ho boloka lera e sebetsang, 'me e be le karolo e phahameng ka ho fetisisa filiming e kopaneng, e khethollang ho tiea ka kakaretso ha filimi e kopaneng. . Lisebelisoa tsa motheo ke haholo-holo PE, PP, EVA, PET, le PS.
Lera le sebetsang
Lera le sebetsang lafilimi ea ho paka lijohangata ke lera la mokoallo, hangata le bohareng ba filimi e nang le likarolo tse ngata, haholo-holo ho sebelisa li-resin tse thibelang likokoana-hloko tse kang EVOH, PVDC, PVA, PA, PET, joalo-joalo Har'a tsona, lisebelisoa tse ngata tse sebelisoang haholo ke EVOH le PVDC. , 'me PA le PET tse tloaelehileng li na le thepa e tšoanang ea lithibelo, e leng ea thepa e thibelang likokoana-hloko.
EVOH (ethylene vinyl alcohol copolymer)
Ethylene vinyl alcohol copolymer ke thepa ea polymer e kopanyang ts'ebetso ea li-polymer tsa ethylene le thepa ea thibelo ea khase ea li-polymer tsa joala tsa ethylene. E na le pepenene haholo 'me e na le khanya e ntle. EVOH e na le thepa e ntle ea litšitiso bakeng sa likhase le oli, e nang le matla a matla a mochini, elasticity, ho hanyetsa ho roala, ho hanyetsa serame, le matla a holim'a metsi, le ts'ebetso e ntle ea ts'ebetso. Tšebetso ea thibelo ea EVOH e itšetlehile ka litaba tsa ethylene. Ha litaba tsa ethylene li eketseha, ts'ebetso ea thibelo ea khase e fokotseha, empa ts'ebetso ea ho hanyetsa mongobo e ea eketseha, 'me ho bonolo ho e sebetsa.
Lihlahisoa tse kentsoeng ka thepa ea EVOH li kenyelletsa linoko, lihlahisoa tsa lebese, lihlahisoa tsa nama, lihlahisoa tsa chisi, joalo-joalo.
PVDC (polyvinylidene chloride)
Polyvinylidene chloride (PVDC) ke polima ea vinylidene chloride (1,1-dichlorethylene). Thempereichara ea ho bola ea homopolymer PVDC e tlase ho feta sebaka sa eona sa ho qhibiliha, ho etsa hore ho be thata ho qhibiliha. Ka hona, e le thepa ea ho paka, PVDC ke copolymer ea vinylidene chloride le vinyl chloride, e nang le moea o motle, ho hanyetsa kutu, ho hatisa hantle le thepa ea ho tiisa mocheso.
Mehleng ea pele, e ne e sebelisoa haholo-holo bakeng sa liphutheloana tsa sesole. Lilemong tsa bo-1950, e ile ea qala ho sebelisoa e le filimi ea ho boloka lijo, haholo-holo ka tsoelo-pele e potlakileng ea theknoloji ea sejoale-joale ea ho paka le lebelo la bophelo ba batho ba sejoale-joale, liphutheloana tse potlakileng tsa serame le ho li boloka, phetoho ea lijana tsa microwave, le katoloso ea lijo le lijo. nako ea tšebeliso ea lithethefatsi e entse hore tšebeliso ea PVDC e ratoe haholoanyane. PVDC e ka etsoa lifilimi tse tšesaane haholo, e fokotsa bongata ba thepa e tala le litšenyehelo tsa ho paka. E ntse e tumme le kajeno
Sekhomaretsi se khomarelang
Ka lebaka la kamano e fokolang pakeng tsa li-resin tse ling tsa motheo le li-resin tse sebetsang hantle, hoa hlokahala ho beha likarolo tse ling tsa sekhomaretsi pakeng tsa lihlopha tsena tse peli hore li sebetse e le sekhomaretsi le ho etsa filimi e kopantsoeng e kopantsoeng. Lera la sekhomaretsi le sebelisa resin ea sekhomaretsi, e sebelisoang hangata e kenyelletsa polyolefin e hlomathisitsoeng ka maleic anhydride le ethylene vinyl acetate copolymer (EVA).
Maleic anhydride e hlomathiselelitsoeng polyolefin
Maleic anhydride grafted polyolefin e hlahisoa ka ho hlomathisetsa maleic anhydride holim'a polyethylene ka extrusion e sebetsang, ho hlahisa lihlopha tsa mahlakoreng a polar liketane tseo e seng tsa polar. Ke sekhomaretsi pakeng tsa lisebelisoa tsa polar le tse seng tsa polar 'me hangata li sebelisoa lifiliming tse kopantsoeng tsa polyolefin tse kang polypropylene le nylon.
EVA (ethylene vinyl acetate copolymer)
EVA e hlahisa vinyl acetate monomer ka ketane ea limolek'hule, e fokotsa kristale ea polyethylene le ho ntlafatsa ts'ebetso ea ho qhibiliha le ho tiisa mocheso oa li-filler. Likahare tse fapaneng tsa ethylene le vinyl acetate ka thepa li baka lits'ebetso tse fapaneng:
① Lihlahisoa tsa mantlha tsa EVA tse nang le ethylene acetate content ka tlase ho 5% ke likhomaretsi, lifilimi, lithapo le likhoele, joalo-joalo;
② Lihlahisoa tse ka sehloohong tsa EVA tse nang le vinyl acetate content ea 5% ~ 10% ke lifilimi tse elastic, joalo-joalo;
③ Lihlahisoa tse ka sehloohong tsa EVA tse nang le vinyl acetate content ea 20% ~ 28% ke li-adhesive tse chesang tse qhibilihisang le lihlahisoa tsa ho roala;
④ Lihlahisoa tse ka sehloohong tsa EVA tse nang le vinyl acetate content ea 5% ~ 45% ke lifilimi (ho kenyeletsoa lifilimi tsa temo) le maqephe, lihlahisoa tse entsoeng ka ente, lihlahisoa tsa foam, joalo-joalo.
Nako ea poso: Jun-12-2024