Mbụ niile, ndịmultilayer ngalaba-extrusioniguzogide diaphragm bụ ihe nkiri plastik.N'ọhịa nke ngwaahịa rọba, anyị na-ezokarị aka na ngwaahịa plastik dị larịị na ọkpụrụkpụ na-erughị 0.2 mm dị ka ihe nkiri plastik, ndị nwere ọkpụrụkpụ n'etiti 0.2 na 0.7 mm dị ka mpempe akwụkwọ plastik na ndị nwere oke karịa 0.7 mm dị ka efere.Multilayer co-extrusion eguzogide diaphragm ga-enwe ụfọdụ ihe mgbochi gas.Ihe mgbochi ebe a na-ezo aka n'ikike mkpuchi nke ngwaahịa rọba (containers, fim) megide obere gas molecular na ísì.Anyị na-ejikarị gas permeability tụọ permeability nke ngwaahịa rọba.PE, PP na ndị ọzọ n'ozuzu plastics nwere nnukwu gas permeability ụkpụrụ, ya bụ, gas permeability adịghị mma, mgbe PA, PVDC, EVOH na ndị ọzọ resin ihe nwere nnọọ obere gas permeability ụkpụrụ karịa n'ozuzu plastics, na gas permeability dị mma.Ya mere, anyị na-akpọkarịihe nkiri coextrusion multilayernwere opekata mpe otu ihe resin nke PA, PVDC na EVOH dị ka diaphragm nguzogide multilayer coextrusion.Enwere ike iji PE, PA, TIE, EVOH na resins ndị ọzọ maka nkwakọ ngwaahịa agụụ mmiri ara ehi, jam, ngwaahịa anụ, wdg.
Ihe nkiri jikọtara Multilayerna-ejikarị usoro ihe atụ ABCBA5 oyi akwa, yana PA ma ọ bụ EVOH dị ka oyi akwa mgbochi yana polyethylene dị ka oyi akwa mkpuchi ọkụ.A na-eji resin nrapado kewaa oyi akwa mgbochi na-ejikọtaghị na oyi akwa mkpuchi okpomọkụ.PA ma ọ bụ EVOH na-enwe mmetụta nke ukwuu maka iru mmiri, nke oyi akwa polyethylene na-echekwa ya, yana arụ ọrụ mgbochi oxygen ya dị mma emebela nke ọma.N'ozuzu, Ọdịdị nkemultilayer ngalaba-extruded ihe nkiridabere na ọrụ chọrọ nke ihe nkiri ahụ.Na premise nke izute usoro chọrọ, Nchikota nke dị iche iche polymers nwere ike izute arụ ọrụ chọrọ nke nkwakọ ihe dị ka mgbochi, okpomọkụ akara, ahu ike, thermal puncture, gburugburu ebe obibi mgbanwe, nke abụọ nhazi àgwà na ndọtị nke nchekwa na shelf ndụ.Site n'echiche nke ọrụ chọrọ, nchikota nke polymer ise zuru ezu.Agbanyeghị,ihe nkiri mejupụtara ihe jikọrọ ọnụna asaa, itoolu, iri na otu ma ọ bụ karịa n'ígwé ka etinyere n'ahịa na-eme ka ọ na-emekarị na-eto eto ngwa ngwa.A na-eji nwayọọ nwayọọ na-achọ ihe nhazi nke ihe nkiri a na-emepụta ihe iji nweta ọnọdụ dị mma nke ijikọta ọrụ, nkà na ụzụ, ọnụ ahịa, nchebe gburugburu ebe obibi, nchekwa na nhazi nke abụọ.
1. Ntụnyere ọnụ ahịa
Iji polymer dị ọnụ ala n'elu kama polymers dị oké ọnụ ahịa nwere ike ibelata ọnụ ahịa ngwaahịa ma nwee ọrụ mkpuchi okpomọkụ na oke mmiri na-eguzogide nke ion yinye polymers.Maka ihe ndị nwere otu ihe mgbochi na okpomọkụ-akara-ikike 7-layer co-extrusion fụọ ihe nkiri dị mma karịa ihe nkiri 5-layer.
2. Ihe mgbochi
Iji polymer abụọ dị iche iche kama otu polymer na oyi akwa mgbochi nwere ike imeziwanye ihe mgbochi ya.Dị ka ihe atụ, Nchikota EVOH oyi akwa na-ahụkarị naịlon ihe nwere ike ọ bụghị nanị ịnọgide na-enwe penetrability nke PA, ma na-amụba ike nke EVOH na melite mgbape eguzogide nke EVOH n'ihi na EVOH oyi akwa na-sandwiched n'etiti abụọ n'ígwé nke PA amine, na-eme ya. ihe nkiri nwere ihe mgbochi dị elu, ebe a pụghị imezu ihe nkiri co-extrusion nke ise.Enwere ike ịgbakwunye ọnụ ahịa nke ịgbakwunye EVOH na mkpokọta oriri nke ihe owuwu ahụ.Ọnụ ọgụgụ nnyefe ikuku oxygen nke ihe nkiri na-ejikọta ihe nkiri ise nke nwere 20% PA bụ 3.5 nkeji, ma n'okpuru otu ọnọdụ ahụ, ọnụego nnyefe nke EVOH agbakwunyere na ihe nkiri okpukpu asaa bụ 0.13 nkeji.
3. Mgbochi mgbawa
Enwere ike imeziwanye ihe nkiri nke ihe nkiri PA na-etinye ọnụ na ọkwa ndị ọzọ.Dịka ọmụmaatụ, iji akwa mkpuchi ọzọ nwere ike imeziwanye ihe mgbochi nke ihe nkiri ahụ site n'ịbawanye mmetụta mgbochi mmiri vapor nke ihe nkiri ahụ.Uru ọzọ a na-enweta n'otu oge ahụ bụ na ọ nwere ike ime ka ihe nkiri ahụ dịkwuo nro, nwee mmetụta dị mma ma nwee ezigbo nkwụsị mgbape.
Site na ọganihu na-aga n'ihu nke teknụzụ njikọ polymer, enwere ike iji polymer ọhụrụ nwere ihe pụrụ iche nke anụ ahụ na nke arụ ọrụ iji gboo mkpa nke nkwakọ ngwaahịa.Ọrụ na nhazi nkemultilayer ngalaba-extruded mejupụtara mkpụrụ ihe nkiriga-enwe nnukwu mgbanwe na akụ na ụba.Site na ngwa na nkwalite nke ịkpụzi akụrụngwa na teknụzụ, jikọtara ya na pụrụ iche na irè imewe nke mejupụtara Ọdịdị, fim emepụta ga-enwe a revolutionary ọrụ na nchụso na iche echiche mode nke echiche nke diversification nke nkwakọ ọrụ, rationalization nke nkwakọ Ọdịdị, na maximization nke uru nkwakọ ngwaahịa.
Oge nzipu: Eprel-17-2023