Umgca wokudibanisa i-PP/PE/PA/PETG/EVOH Multilayer Barrier Sheet Co-extrusion Line
Ipharamitha yoBugcisa obuPhambili
| Imodeli yomgca | Imodeli yokukhupha | Ububanzi bemveliso | Ubukhulu beemveliso | Imveliso yokukhupha uyilo |
| I-7 layers co-extrusion | 120/75/50/60/75 | 800-1200mm | 0.2-0.5mm | 500-600kg/h |
| I-co-extrusion yeeleya ezili-9 | 75/100/60/65/50/75/75 | 800-1200mm | 0.05-0.5mm | 700-800kg/h |
Qaphela: Iinkcukacha zingatshintsha ngaphandle kwesaziso sangaphambili.
Imeko yemarike yezicelo zokupakisha ze-EVOH
Kwicandelo lokupakisha ukutya okucoliweyo, abantu babesebenzisa izinto zesinyithi okanye zeglasi njengokupakisha ukutya ukuze bahlukanise ngokufanelekileyo ukungena kwezinto ezahlukeneyo zegesi ngaphakathi nangaphandle ukuqinisekisa umgangatho womxholo kunye nexabiso lempahla. Kuba kukho izinto ezintathu eziphambili ezibangela ukonakala kokutya: izinto zebhayoloji (iimpendulo ze-enzyme zebhayoloji, njl.njl.), izinto zeekhemikhali (ngokuyintloko i-oxidation yezinto zokutya) kunye nezinto zomzimba (hygroscopic, ukomisa, njl.njl.). Ezi zinto zidlala indima kwiimeko zokusingqongileyo ezifana neoksijini, ukukhanya, ubushushu, ukufuma, njl.njl., ezibangela ukonakala kokutya. Ukuthintela ukonakala kokutya kukuthintele ukwanda kweentsholongwane ekutyeni, ukuthintela i-oxidation yezinto zokutya yioksijini, kunye nokuthintela umswakama kunye nokugcina incasa yokuqala yokutya.
I-ethylene-vinyl alcohol copolymer, ebizwa ngokuba yi-EVOH, yaziwa njengee-barrier resins ezintathu ezinkulu kwihlabathi kunye ne-polyvinylidene chloride (PVDC) kunye ne-polyamide (PA) [2]. I-EVOH inokuthintela kakhulu ukungena kweoksijini emoyeni ekutyeni, ngaloo ndlela ithintele ukuveliswa kweetyhefu kunye nezinye izinto eziyingozi ngenxa yokwanda kwee-microorganisms, kwaye inokuthintela utshintsho lokwakheka okubangelwa yi-oxidation, ngelixa igcina ivumba kwaye ithintela ungcoliseko lwangaphandle lwevumba. Ngaphezu koko, ukungabikho kweempawu zomqobo womswakama kunokuhlawulwa ngezinye iileya ze-polyolefin. Ke ngoko, izixhobo zokupakisha ze-EVOH ezininzi zinokuthintela ngokufanelekileyo ukonakala kokutya kwaye zandise ubomi beshelufu. Ukongeza, kulula ukuyicubungula nokuyila, kwaye isebenza kakuhle ekukhuseleni okusingqongileyo. Ngenxa yeempawu zomqobo wegesi ezibalaseleyo, ukucaca, ukuqhubekeka kunye nokumelana nokunyibilikisa kwe-resin ye-EVOH, amasimi ayo okusetyenziswa aya ebanzi, kwaye imfuno nayo ikhula ngokukhawuleza.
I-resin ye-EVOH enomqobo ophezulu
1. Iimpawu zezinto ezibonakalayo
Iimpawu zomqobo ze-EVOH Iimpawu zomqobo zezinto zepolymer zibhekisa kumandla okukhusela iimveliso kwiigesi ezincinci zemolekyuli, ulwelo, umphunga wamanzi, njl.njl. Iindidi ze-resin ezisetyenziswa rhoqo ngoku ezineempawu zomqobo ezilungileyo ziquka: i-EVOH, i-PVDC, i-PAN, i-PEN, i-PA kunye ne-PET.
2. Xa i-EVOH isetyenziswa njengesixhobo esinomqobo ophezulu, idla ngokusebenzisa isakhiwo esidityanisiweyo esineengqimba ezininzi. Izinto ezidityanisiweyo ezisetyenziswa rhoqo zezi: PP, HIPS, PE, EVOH, AD, kwaye i-AD sisincamathelisi kwisakhiwo. Isakhiwo esidityanisiweyo esineengqimba ezininzi sinokunika amandla apheleleyo kwiimpawu zento nganye, siphucule ukumelana namanzi kwe-EVOH, kwaye sifumane izinto ezinomqobo ophezulu ezineempawu ezigqibeleleyo. Uninzi lwazo zazisetyenziswa kwiphakheji eguquguqukayo ngaphambili, kodwa ii-resin ezidityanisiweyo ezifana ne-PP, PE, kunye ne-PA azilula ukuzibhoboza ngenxa yokuqina kwazo okuhle kunye nokuqina okungekho mthethweni, okuthintela ukusetyenziswa kwazo kwicandelo lokupakisha okuqinileyo, ngakumbi kwiimveliso zokuzalisa ezikwi-intanethi. I-polystyrene HIPS enganyangekiyo yimpembelelo inobulukhuni obuhle kunye neempawu zokubumba ezibalaseleyo, ezifanelekileyo ukubhoboza kwaye zifanelekile kwizixhobo zokupakisha eziqinileyo. Ke ngoko, kungxamisekile ngokukodwa ukuphuhlisa ngamandla izixhobo ezidityanisiweyo ze-EVOH ezinomqobo ophezulu ezifanelekileyo kwiphakheji eqinileyo.
Ngenxa yokungahambisani kakuhle phakathi kwe-EVOH resin kunye ne-HIPS resin, kunye nomahluko omkhulu kwizinga le-resin rheology, amandla okubopha phakathi kwe-substrate kunye ne-EVOH, iimfuno zeempawu zokuxinana ze-EVOH ngexesha lokubumba okwesibini, kunye nokusasazwa komaleko we-EVOH ngexesha lokwenziwa kwekhalenda ukuvelisa amaphepha adibeneyo. Ukufana kwezinto ezidibeneyo yimiba ephambili echaphazela ukusebenza kunye nokusetyenziswa kwezinto ezidibeneyo, kwaye zikwayiingxaki ezinzima ekufuneka zisonjululwe xa kusenziwa olu hlobo lwezinto ezidibeneyo.
Isitshixo setekhnoloji ye-multi-layer co-extrusion yi-adhesive (AD). Izinto zokupakisha ezidityanisiweyo ze-EVOH zihlala ziquka i-PPEVOH, kodwa i-PP kunye ne-EVOH azinakuhlanganiswa ngokuthe ngqo ngobushushu, kwaye i-adhesive (AD) kufuneka yongezwe phakathi kwe-PP kunye ne-EVOH. Xa ukhetha i-adhesive, kuyimfuneko ukuqwalasela i-adhesive ye-PP njengezinto ezisisiseko, eyesibini kukuhambelana kwe-melt viscosity ye-PP kunye ne-EVOH, kwaye eyesithathu yimfuneko yeempawu zokuxinana, ukuze kuthintelwe ukwahlukana ngexesha lokucubungula okwesibini. Ke ngoko, amaphepha adityanisiweyo ikakhulu ngamaphepha adityanisiweyo ane-layer ezintlanu (PPADEVOHADPP). /AD/EVOH/AD/R/PP, umaleko ongaphandle yi-PP entsha, kwaye ezinye iileya ezimbini zizinto eziphinda zisetyenziswe ze-PP ezicoliweyo R(PP). Isakhiwo esingalinganiyo singasetyenziswa, kwaye ezinye izinto (PE/HIPS, njl.njl.) zingongezwa kwi-co-extrusion. Umgaqo uyafana, kwaye indlela efanayo ye-multi-layer co-extrusion inokufezekiswa.
Isicelo
Izinto ze-EVOH zineempawu ezintle zokuthintela. Ngokusebenzisa itekhnoloji yokukhupha kunye ne-PP, PE, PA, PETG kunye nezinye izinto, zinokucutshungulwa zibe zizixhobo zokupakisha ezilula ezinomgangatho o-5, 7-layer, kunye nomgangatho o-9-layer high-barrier, ezisetyenziswa kakhulu ekupakisheni okungaseptic, kwiziselo zejeli, kwiimveliso zobisi, kwiipakeji zeentlanzi ezibandayo kunye neemveliso zenyama njl. Kwicala elingelokutya, lisetyenziswa kwiipakeji zamayeza, kwi-volatile solvent packaging nakwezinye iindawo, ezineempawu ezintle zokuthintela, nto leyo ephucula kakhulu ixesha lokugcinwa kweemveliso.
