Ka ịgbatị ndụ shelf ndụ nke bekee dị ka nri na ọgwụ ọjọọ, ọtụtụihe nkwakọ ngwaahịamaka nri na ọgwụ n'oge na-eji multi-layer nkwakọ ihe nkiri mejupụtara. Ugbu a, e nwere abụọ, atọ, ise, asaa, itoolu, na ọbụna iri na otu n'ígwé nke ihe ngwakọta mejupụtara. Ihe nkiri nkwakọba ihe nke ọtụtụ oyi akwa bụ ihe nkiri dị gịrịgịrị etolite site n'iwepụ ọtụtụ akụrụngwa plastik n'ime ọtụtụ ọwa n'otu oge site na oghere oghere, nke nwere ike itinye uru nke ihe dị iche iche.
Multi oyi akwankwakọ ihe nkiri mpịakọtabụ nke kachasị mejupụtara ngwakọta polyolefin. Ugbu a, ihe ndị a na-ejikarị eme ihe gụnyere: polyethylene/polyethylene, polyethylene ethylene vinyl acetate copolymer/polypropylene, LDPE/adhesive Layer/EVOH/adhesive Layer/LDPE, LDPE/adhesive Layer/EVH/EVOH/EVOH/adhesive Layer/LDPE. Enwere ike idozi ọkpụrụkpụ nke oyi akwa ọ bụla site na teknụzụ extrusion. Site n'ịgbanwe oke nke oyi akwa mgbochi na iji ihe mgbochi dị iche iche, ihe nkiri na-agbanwe agbanwe nwere ihe mgbochi dị iche iche nwere ike ịmepụta. Enwere ike dochie ihe mkpuchi mkpuchi okpomọkụ na-agbanwe agbanwe ma gbanwee iji gboo mkpa nke nkwakọ ngwaahịa dị iche iche. Nke a multi-layer na multifunctional nkwakọ ngwaahịa bụ isi ntụziaka maka mmepe nke nkwakọ ihe nkiri ihe n'ọdịnihu.
Multi oyi akwa nkwakọ ngwaahịa mejupụtara film Ọdịdị
Ihe nkiri nkwakọba ihe nke ọtụtụ oyi akwa, n'agbanyeghị ọnụ ọgụgụ nke akwa akwa, a na-ekewakarị n'ime oyi akwa isi, oyi akwa na-arụ ọrụ, na nrapado nke dabere na ọrụ nke ihe nkiri ọ bụla.
Isi ọkwa
N'ozuzu, n'ime na elu n'ígwé nke mejupụtara ihe nkiri kwesịrị inwe ezigbo anụ ahụ na n'ibu Njirimara, akpụ nhazi arụmọrụ, na okpomọkụ akara oyi akwa. Ọ dịkwa mkpa inwe ezigbo mkpuchi mkpuchi okpomọkụ na arụmọrụ ịgbado ọkụ na-ekpo ọkụ, nke dị ntakịrị ọnụ ala, nwere nkwado dị mma na njigide na-arụ ọrụ na oyi akwa na-arụ ọrụ, ma nwee oke kachasị elu na ihe nkiri ahụ mejupụtara, na-achọpụta nkwụsi ike zuru ezu nke ihe nkiri ahụ mejupụtara. . Ihe ndị bụ isi bụ PE, PP, EVA, PET, na PS.
oyi akwa na-arụ ọrụ
The arụ ọrụ oyi akwa nkeihe nkiri nkwakọ nribụ ukwuu n'ime ihe mgbochi oyi akwa, na-emekarị na n'etiti multi-layer composite film, tumadi na-eji mgbochi resins dị ka EVOH, PVDC, PVA, PA, PET, wdg N'ime ha, ndị a na-ejikarị akwa mgbochi ihe bụ EVOH na PVDC. , na PA na PET nkịtị nwere ihe mgbochi yiri nke ahụ, bụ nke ihe mgbochi ọkara.
EVOH (etylene vinyl mmanya copolymer)
Ethylene vinyl mmanya copolymer bụ ihe polymer na-ejikọta usoro nke ethylene polymers na ihe mgbochi gas nke ethylene mmanya polymers. Ọ na-egosipụta nke ọma ma nwee ọmarịcha gloss. EVOH nwere ihe mgbochi dị mma maka gas na mmanụ, nwere ike ịrụ ọrụ nke ọma, ngbanwe, nguzogide eyi, nguzogide oyi, na ike elu, yana ezigbo nhazi nhazi. Ọrụ mgbochi nke EVOH dabere na ọdịnaya ethylene. Mgbe ọdịnaya ethylene na-abawanye, arụ ọrụ mgbochi gas na-ebelata, mana arụmọrụ nguzogide mmiri na-abawanye, ọ dịkwa mfe ịhazi.
Ngwaahịa ejiri ngwa EVOH chịkọbara gụnyere oge nri, ngwaahịa mmiri ara ehi, ngwaahịa anụ, ngwaahịa cheese, wdg.
PVDC (polyvinylidene chloride)
Polyvinylidene chloride (PVDC) bụ polymer nke vinylidene chloride (1,1-dichlorethylene). Ọnọdụ ire ere nke homopolymer PVDC dị ala karịa ebe agbaze ya, na-eme ka ọ sie ike ịgbaze. Ya mere, dị ka ihe nkwakọ ngwaahịa, PVDC bụ copolymer nke vinylidene chloride na vinyl chloride, nke nwere ezigbo ikuku ikuku, nguzogide corrosion, ezigbo mbipụta na ikpo ọkụ ọkụ.
N'oge mbụ, a na-ejikarị ya eme nkwakọ ngwaahịa ndị agha. N'afọ ndị 1950, a malitere iji ya dị ka ihe nkiri nchekwa nri, karịsịa na mmepe ngwa ngwa nke nkà na ụzụ nkwakọ ngwaahịa ọgbara ọhụrụ na usoro ndụ ndị mmadụ nke oge a, nkwakọ ngwaahịa oyi na nchekwa ngwa ngwa, mgbanwe nke microwave cookware, na mgbasawanye nke nri na nri. Ndụ nchekwa ọgwụ emela ngwa PVDC ewu ewu karịa. Enwere ike ịme PVDC ka ọ bụrụ ihe nkiri dị oke mkpa, na-ebelata ọnụ ahịa akụrụngwa na ọnụ ahịa nkwakọ ngwaahịa. Ọ ka na-ewu ewu taa
Nrapado oyi akwa
N'ihi adịghị mma mmekọrịta dị n'etiti ụfọdụ isi resins na arụ ọrụ oyi akwa resins, ọ dị mkpa na-etinye ụfọdụ nrapado n'ígwé n'etiti abụọ a n'ígwé na-eme ihe dị ka gluu na-eme ihe integrated mejupụtara ihe nkiri. Ngwunye nrapado na-eji resin nrapado, nke a na-ejikarị gụnyere polyolefin anyadokwa ya na anhydride maleic na ethylene vinyl acetate copolymer (EVA).
Maleic anhydride anyadokwa polyolefins
A na-emepụta polyolefin maleic anhydride anyado site n'ịkwado anhydride maleic na polyethylene site na extrusion reactive, na-ewebata otu akụkụ pola na agbụ ndị na-abụghị pola. Ọ bụ nrapado n'etiti polar na ihe ndị na-abụghị polar ma na-ejikarị eme ihe na ihe nkiri ihe nkiri nke polyolefins dị ka polypropylene na naịlọn.
EVA (etylene vinyl acetate copolymer)
EVA na-ewebata vinyl acetate monomer n'ime agbụ molekụla, na-ebelata crystallinity nke polyethylene ma na-emeziwanye ike solubility na njikwa ọkụ nke ndị na-ejuputa. Ihe dị iche iche nke ethylene na vinyl acetate na ihe na-ebute ngwa dị iche iche:
① Isi ngwaahịa nke Eva na ethylene acetate ọdịnaya n'okpuru 5% bụ adhesives, ihe nkiri, wires na cables, wdg;
② Isi ngwaahịa nke EVA nwere ọdịnaya vinyl acetate nke 5% ~ 10% bụ ihe nkiri na-agbanwe agbanwe, wdg;
③ The isi ngwaahịa nke EVA na vinyl acetate ọdịnaya nke 20% ~ 28% bụ ọkụ gbazee adhesives na mkpuchi ngwaahịa;
④ Isi ngwaahịa nke EVA na ọdịnaya vinyl acetate nke 5% ~ 45% bụ ihe nkiri (gụnyere ihe nkiri ugbo) na mpempe akwụkwọ, ngwaahịa ndị a na-agba ntụtụ, ngwaahịa ụfụfụ, wdg.
Oge nzipu: Jun-12-2024