Ina ia faʻalauteleina le ola faʻapolopolo o mea e pei o meaʻai ma vailaʻau, telemea fa'apipi'imo mea'ai ma vaila'au i aso nei e fa'aogaina ata fa'apipi'i fa'apipi'i tele. I le taimi nei, e lua, tolu, lima, fitu, iva, ma e oʻo lava i le sefulutasi laulau o mea faʻapipiʻi tuʻufaʻatasia. O ata tifaga faʻapipiʻi tele o se ata manifinifi e faia e ala i le faʻapipiʻiina o le tele o mea palasitisi i totonu o le tele o alalaupapa i le taimi e tasi mai le avanoa e tasi, lea e mafai ona faʻaogaina le lelei o mea eseese.
Fa'ava'a fa'ateleafifiina ata tifaga lolao lo'o fa'apipi'iina i tu'ufa'atasiga polyolefin. I le taimi nei, o fausaga e masani ona faʻaaogaina e aofia ai: polyethylene / polyethylene, polyethylene ethylene vinyl acetate copolymer / polypropylene, LDPE / faʻapipiʻi faʻapipiʻi / EVOH / faʻapipiʻi faʻapipiʻi / LDPE, LDPE / faʻapipiʻi faʻapipiʻi / EVH / EVOH / EVOH / faʻapipiʻi faʻapipiʻi / LDPE. O le mafiafia o vaega taʻitasi e mafai ona fetuʻunaʻi e ala i tekinolosi faʻapipiʻi. E ala i le fetuutuunai o le mafiafia o le pa puipui ma le faʻaaogaina o mea faʻapipiʻi eseese, e mafai ona mamanuina ata tifaga faʻatasi ma mea faʻapitoa faʻalavelave. E mafai fo'i ona suitulaga ma fetu'una'i mea e fa'amaufa'ailogaina vevela e fa'afetaui ai mana'oga o afifi eseese. O lenei faʻapipiʻi faʻapipiʻi tele ma multifunctional o le faʻatonuga autu mo le atinaʻeina o mea faʻapipiʻi ata i le lumanaʻi.
Fa'apipi'i fa'apipi'i fa'aopoopo fa'aputuga ata tifaga
Fa'ato'a fa'apipi'i fa'apipi'i ata tifaga, e tusa lava po'o le a le aofa'i o laulau, e masani lava ona vaevaeina i le fa'avae, fa'atino galuega, ma le fa'apipi'i fa'avae e fa'atatau i galuega a vaega ta'itasi o le ata.
Tulaga faavae
E masani lava, o totonu ma fafo o le faʻapipiʻiina o ata tifaga e tatau ona i ai ni mea faʻaletino lelei ma faʻainisinia, faʻatulagaina o gaioiga gaioiga, ma le faʻamaufaʻailoga vevela. E manaʻomia foʻi le lelei o le faʻamaufaʻailogaina o le vevela ma le faʻaogaina o le vevela vevela, e tau maualalo le tau, e iai le lagolago lelei ma le faʻamauina o aʻafiaga i luga o le vaega galue, ma maua le maualuga maualuga i le ata tuʻufaʻatasia, e fuafua ai le malosi atoa o le ata faʻapipiʻi. . O mea faʻavae e masani lava PE, PP, EVA, PET, ma PS.
Fa'atino galuega
Le vaega galue oata afifi meaaio le tele lava o se pa puipui, e masani lava i le ogatotonu o le tele-layer composite ata tifaga, e masani ona faʻaaogaina pa puipui e pei o EVOH, PVDC, PVA, PA, PET, ma isi. , ma o le PA masani ma le PET o loʻo i ai mea faʻapitoa pa puipui, o loʻo i totonu o mea faʻafefe.
EVOH (ethylene vinyl alcohol copolymer)
Ethylene vinyl alcohol copolymer o se mea polymer e tu'ufa'atasia ai le fa'agaioiina o le ethylene polymers ma le kesi o mea o le ethylene alcohol polymers. E matua manino ma e lelei le iila. O le EVOH o loʻo i ai ni mea faʻapitoa mo pa puipui mo kesi ma suauʻu, faʻatasi ai ma le malosi faʻainisinia sili ona lelei, elasticity, faʻaofuofu teteʻe, teteʻe malulu, ma le malosi i luga, ma sili atu galuega faatino. Ole fa'atinoga ole pa puipui ole EVOH e fa'alagolago ile mea ole ethylene. A faʻatuputeleina le ethylene, e faʻaitiitia le faʻatinoga o le kesi, ae faʻateleina le faʻaogaina o le susu, ma e faigofie ona faʻagasolo.
O oloa o lo'o fa'apipi'iina i mea EVOH e aofia ai fa'amamafa, mea tau susu, oloa aano o manufasi, oloa sisi, ma isi.
PVDC (polyvinylidene chloride)
Polyvinylidene chloride (PVDC) o se polymer o le vinylidene chloride (1,1-dichloroethylene). O le vevela o le pala o le homopolymer PVDC e maualalo ifo nai lo lona liusuavai, e faigata ai ona liusuavai. O le mea lea, i le avea ai o se mea faʻapipiʻi, o le PVDC o se copolymer o le vinylidene chloride ma le vinyl chloride, o loʻo i ai le lelei o le ea, faʻafefeteina, lolomi lelei ma faʻamaufaʻailoga vevela.
I aso muamua, sa masani ona faʻaaogaina mo le faʻapipiʻiina o le militeri. I le 1950s, na amata ona faʻaaogaina e avea o se ata e faʻasaoina ai meaʻai, aemaise lava i le televave o le atinaʻeina o tekinolosi faʻaonaponei faʻaonaponei ma le saoasaoa o tagata faʻaonaponei o le olaga, o le vave malulu ma le faʻasaoina o le afifiina, le suiga o le microwave kuka, ma le faʻalauteleina o meaʻai ma O le ola fa'agata o fualaau fa'asaina ua sili atu ona ta'uta'ua le fa'aogaina o le PVDC. PVDC e mafai ona faia i ni ata tifaga ultra-manifinifi, faʻaititia le aofaʻi o mea mataʻutia ma tau afifiina. O loo lauiloa pea i aso nei
Papa pipii
Ona o le le lelei o le vavalalata i le va o nisi resins faavae ma resins layer galue, e tatau ona tuʻu ni laulau faʻapipiʻi i le va o nei laulau e lua e fai ma kelu ma fausia ai se ata tuʻufaʻatasia tuʻufaʻatasia. O le mea fa'apipi'i e fa'aogaina ai le resini pipii, e masani ona fa'aogaina e aofia ai le polyolefin fa'apipi'i i maleic anhydride ma le ethylene vinyl acetate copolymer (EVA).
Maleic anhydride ua faapipiiina polyolefins
Maleic anhydride faapipiiina polyolefin e gaosia e ala i le faapipii maleic anhydride i luga o le polyethylene e ala i le extrusion reactive, faʻafeiloaʻi vaega polar i luga o filifili e le polar. O se mea fa'apipi'i i le va o mea polar ma mea e le o polar ma e masani ona fa'aogaina i ata tu'ufa'atasi o polyolefins e pei ole polypropylene ma le nylon.
EVA (ethylene vinyl acetate copolymer)
EVA faʻafeiloaʻi le vinyl acetate monomer i totonu o le filifili mole, faʻaitiitia le tioata o le polyethylene ma faʻaleleia le solubility ma le faʻamaufaʻailogaina faʻamaufaʻailogaina faʻaogaina o mea faʻatumu. O mea eseese o le ethylene ma le vinyl acetate i meafaitino e maua ai faʻaoga eseese:
① O oloa autu a le EVA ma le ethylene acetate i lalo ole 5% o mea faʻapipiʻi, ata tifaga, uaea ma uaea, ma isi;
② O oloa autu a le EVA ma le vinyl acetate anotusi o le 5% ~ 10% o ata tifaga, ma isi;
③ O oloa autu a le EVA ma le vinyl acetate anotusi o le 20% ~ 28% o mea faʻapipiʻi vevela vevela ma mea faʻapipiʻi;
④ O oloa autu a le EVA ma le vinyl acetate anotusi o le 5% ~ 45% o ata tifaga (e aofia ai ata faʻatoʻaga) ma laupepa, mea faʻapipiʻi tui, oloa foam, ma isi.
Taimi meli: Iuni-12-2024