PP/PE/PA/PETG/EVOH Multilayer Barrier Sheet Co-extrusion Line
Paramethara e ka sehloohong ea tekheniki
| Mohlala oa line | Mohlala oa Extruder | Bophara ba lihlahisoa | Lihlahisoa tsa botenya | Tlhahiso ea extrusion ea moralo |
| 7 layers co-extrusion | 120/75/50/60/75 | 800-1200 limilimithara | 0.2-0.5mm | 500-600kg/h |
| 9 layers co-extrusion | 75/100/60/65/50/75/75 | 800-1200 limilimithara | 0.05-0.5mm | 700-800kg/h |
Tlhokomeliso: Litlhaloso li ka fetoha ntle le tsebiso esale pele.
Boemo ba 'maraka ba lisebelisoa tsa ho paka tsa EVOH
Lefapheng la liphutheloana tse batang tsa ketane ea lijo, batho ba ne ba sebelisa lisebelisoa tsa tšepe kapa tsa khalase e le liphutheloana tsa lijo ho arola ka nepo ho kenella ha likarolo tse fapaneng tsa khase kahare le kantle ho netefatsa boleng ba litaba le boleng ba thepa. Hobane ho na le lintlha tse tharo tse kholo tse bakang ho senyeha ha lijo: lintlha tsa likokoana-hloko (karabelo ea enzyme ea likokoana-hloko, joalo-joalo), lik'hemik'hale (haholo-holo oxidation ea likarolo tsa lijo) le lintlha tsa 'mele (hygroscopic, drying, joalo-joalo). Lintlha tsena li na le karolo ea maemo a tikoloho a kang oksijene, leseli, mocheso, mongobo, joalo-joalo, tse bakang ho senyeha ha lijo. Ho thibela ho senyeha ha lijo ke haholo-holo ho thibela ho ata ha likokoana-hloko lijong, ho thibela oxidation ea likarolo tsa lijo ka oksijene, le ho thibela mongobo le ho boloka tatso ea pele ea lijo.
Ethylene-vinyl alcohol copolymer, e bitsoang EVOH, e tsejoa e le li-resin tse tharo tse kholo ka ho fetisisa lefatšeng hammoho le polyvinylidene chloride (PVDC) le polyamide (PA) [2]. EVOH e ka thibela haholo ho kenella ha oksijene moeeng lijong, kahoo e thibela tlhahiso ea chefo le lintho tse ling tse kotsi ka lebaka la ho ata ha likokoana-hloko, hape e ka thibela liphetoho tsa sebopeho tse bakoang ke oxidation, ha li ntse li boloka monko o monate le ho thibela tšilafalo ea monko o ka ntle. Ho feta moo, khaello ea thepa ea thibelo ea mongobo e ka lefelloa ke likarolo tse ling tsa polyolefin. Ka hona, lisebelisoa tsa ho paka tsa EVOH tse ngata li ka thibela ho senyeha ha lijo le ho lelefatsa bophelo ba sethala. Ho feta moo, ho bonolo ho e sebetsa le ho theha, 'me e na le ts'ebetso e ntle ea ts'ireletso ea tikoloho. Ka lebaka la thepa e ntle ea thibelo ea khase, pepeneneng, ts'ebetsong le ho hanyetsa solvent ea EVOH resin, masimo a ts'ebeliso ea eona a ntse a pharalla le ho pharalla, mme tlhoko le eona e ntse e hola ka potlako.
Tšitiso e phahameng ea EVOH resin
1. Lintho tse bonahalang
Thepa ea mokoallo ea EVOH Thepa e thibelang thepa ea polymer e bua ka bokhoni ba ho sireletsa lihlahisoa ho likhase tse nyenyane tsa molek'hule, metsi, mouoane oa metsi, joalo-joalo. le PET.
2. Ha EVOH e sebelisoa e le thepa e phahameng ea thibelo, hangata e amohela mohaho o nang le likarolo tse ngata. Lisebelisoa tse sebelisoang ka mokhoa o tloaelehileng ke: PP, HIPS, PE, EVOH, AD, le AD ke sekhomaretsi mohahong. Mohaho o nang le likarolo tse ngata o ka fana ka papali e feletseng ho thepa ea thepa e 'ngoe le e' ngoe, ho ntlafatsa ho hanyetsa metsi a EVOH, le ho fumana thepa e phahameng ea lithibelo e nang le thepa e babatsehang e pharaletseng. Boholo ba tsona li ne li sebelisoa ka har'a liphutheloana tse feto-fetohang nakong e fetileng, empa li-resin tse kopantsoeng tse kang PP, PE, le PA ha li bonolo ho li phunya ka lebaka la ho tiea ha tsona hantle le ho se tsitse, e leng se thibelang tšebeliso ea tsona tšimong ea ho paka ka thata, haholo-holo lihlahisoa tsa ho tlatsa marang-rang. HIPS ea polystyrene e hananang le tšusumetso e na le botsitso bo botle le thepa e ntle ea ho bopa, e loketseng ho phunya ebile e loketse lisebelisoa tsa ho paka ka thata. Ka hona, ho potlakile ka ho khetheha ho ntshetsa pele ka matla lisebelisoa tse kopantsoeng tsa EVOH tse nang le lithibelo tse phahameng tse loketseng ho paka ka thata.
Ka lebaka la ho se lumellane ho hotle pakeng tsa resin ea EVOH le resin ea HIPS, le phapang e kholo ea sekhahla sa resin rheology, matla a tlamahano pakeng tsa substrate le EVOH, litlhoko tsa thepa e tsitsitseng ea EVOH nakong ea ho bōptjoa ha bobeli, le kabo ea EVOH nakong ea kalendara. hlahisa maqephe a kopantsoeng Ho tšoana ha thepa e kopantsoeng ke lintlha tsa bohlokoa tse amang ts'ebetso le ts'ebeliso ea lisebelisoa tse kopaneng, hape ke mathata a boima a lokelang ho etsoa. rarolloa ha ho hlahisoa mofuta ona oa lisebelisoa tse kopaneng.
Senotlolo sa theknoloji ea li-multi-layer co-extrusion ke sekhomaretsi (AD). Lisebelisoa tsa ho paka tse kopantsoeng tsa EVOH hangata li kenyelletsa PPEVOH, empa PP le EVOH li ke ke tsa tlamahanngoa ka mocheso, 'me sekhomaretsi (AD) se tlameha ho eketsoa lipakeng tsa PP le EVOH. Ha u khetha sekhomaretsi, hoa hlokahala hore u nahane ka sekhomaretsi sa PP e le thepa ea motheo, ea bobeli ke ho bapisa viscosity e qhibilihisitsoeng ea PP le EVOH, 'me ea boraro ke tlhokahalo ea thepa e tsitsitseng, e le ho qoba delamination nakong ea bobeli. ho sebetsa. Ka hona, maqephe a kopantsoeng hangata ke maqephe a mahlano a kopantsoeng (PPADEVOHADPP). /AD/EVOH/AD/R/PP, lera le ka ntle ke PP thepa e ncha,' me likarolo tse ling tse peli ke PP e pshatlehileng thepa e recycled R(PP). Sebopeho sa asymmetric se ka boela sa sebelisoa, 'me lisebelisoa tse ling (PE / HIPS, joalo-joalo) li-extruder li ka ekeletsoa bakeng sa co-extrusion. Molao-motheo oa ts'oana, 'me mokhoa o tšoanang oa li-multi-layer co-extrusion o ka finyelloa.
Kopo
Lisebelisoa tsa EVOH li na le thepa e ntle ea thibelo. Ka theknoloji ea co-extrusion e nang le PP, PE, PA, PETG le lisebelisoa tse ling, e ka sebetsoa hore e be 5-layer, 7-layer, le 9-layer high-barrier lightweight lightweight, e sebelisoang haholo ho paka ka aseptic, lino tsa jelly, lihlahisoa tsa lebese, chilled tlhapi le lihlahisoa tsa nama sephutheloana joalo-joalo. Karolong e seng ea lijo, e sebelisoa ka meriana, sekontiri se chesang. liphutheloana le masimo a mang, a nang le thepa e ntle ea thibelo, e ntlafatsang haholo bophelo ba sethala sa lihlahisoa.
