PP/PE/PA/PETG/EVOH Multilayer Barrier Sheet Co-extrusion Line
Main Technical Parameter
| Mutsara modhi | Extruder model | Products width | Products ukobvu | Dhizaini extrusion kubuda |
| 7 layers co-extrusion | 120/75/50/60/75 | 800-1200mm | 0.2-0.5mm | 500-600kg/h |
| 9 akaturikidzana co-extrusion | 75/100/60/65/50/75/75 | 800-1200mm | 0.05-0.5mm | 700-800kg/h |
Ongorora: Izvo zvakatemwa zvinogona kuchinja pasina chiziviso chekutanga.
Musika mamiriro eEVOH ekurongedza maapplication
Mumunda wekutakura chikafu chinotonhora cheni, vanhu vakashandisa simbi kana girazi zvinhu sechikafu kurongedza kuti vanyatso kuparadzanisa kupinda kwezvinhu zvakasiyana-siyana zvegasi mukati nekunze kuve nechokwadi chemhando yezviri mukati uye kukosha kwezvinhu. Nokuti pane zvinhu zvitatu zvikuru zvinokonzera kukanganisa kwezvokudya: biological factors (biological enzyme reactions, etc.), kemikari zvinhu (kunyanya oxidation yezvikamu zvekudya) uye zvinhu zvemuviri (hygroscopic, kuomesa, nezvimwewo). Izvi zvinhu zvinoita basa mumamiriro ezvakatipoteredza akadai seokisijeni, chiedza, tembiricha, hunyoro, nezvimwewo, izvo zvinokonzeresa kuparara kwechikafu. Kudzivirira kuparara kwechikafu kunonyanya kutadzisa kupararira kwehutachiona mukudya, kudzivirira kusvibiswa kwezvikamu zvekudya neokisijeni, uye kudzivirira unyoro uye kuchengetedza kunhuhwirira kwepakutanga kwechikafu.
Ethylene-vinyl alcohol copolymer, inodaidzwa kuti EVOH, inozivikanwa sematatu makuru ekuvharisa resin pasi rose pamwe ne polyvinylidene chloride (PVDC) uye polyamide (PA) [2]. EVOH inogona kuvharidzira zvakanyanya kupindira kweokisijeni mumhepo muzvokudya, nokudaro ichidzivisa kugadzirwa kwechepfu nezvimwe zvinhu zvinokuvadza nekuda kwekupararira kwe microorganisms, uye inogonawo kudzivirira kuumbwa kwekuchinja kunokonzerwa neoxidation, nekuchengetedza kunhuhwirira uye kudzivirira kunze kwekunhuhwirira kusvibiswa. Uyezve, kushomeka kwehunyoro hunodzivirira zvivakwa kunogona kubhadharwa nemamwe ma polyolefin layer. Naizvozvo, EVOH multilayer kurongedza zvinhu zvinokwanisa kudzivirira kuparara kwechikafu uye kuwedzera hupenyu hwesherufu. Mukuwedzera, iri nyore kugadzirisa uye kuumba, uye ine yakanaka kuchengetedza kwezvakatipoteredza kuita. Nekuda kweakanakisa gasi anodzivirira zvivakwa, pachena, processability uye solvent kuramba kweEVOH resin, minda yekushandiswa kwayo iri kuwedzera nekufara, uye kudiwa kuri kukurawo nekukurumidza.
High chipingamupinyi EVOH resin
1. Material properties
Iyo inovharira zvivakwa zveEVOH Iyo inovharira zvivakwa zvepolymer zvinhu zvinoreva kudzivirira kugona kwezvigadzirwa kune madiki mamorekuru magasi, zvinwiwa, mhute yemvura, nezvimwewo. Parizvino marudzi eresin anowanzoshandiswa ane zvakanaka zvipingamupinyi anosanganisira: EVOH, PVDC, PAN, PEN, PA. uye PET.
2. Apo EVOH inoshandiswa sechinhu chakakwirira chinodzivirira, inowanzotora maitiro akawanda-akawanda akaumbwa. Zvinowanzoshandiswa zvinoumbwa zvinhu ndezvi: PP, HIPS, PE, EVOH, AD, uye AD ndiyo inonamira muchimiro. Iyo yakawanda-layer composite dhizaini inogona kupa yakazara kutamba kune zvimiro zvechimwe nechimwe chinhu, kuvandudza kudzivirira kwemvura kweEVOH, uye kuwana yakakwirira-yekuvharira zvinhu ine yakanakisa yakazara hupfumi. Mazhinji acho aishandiswa mukurongedza kuchinjika munguva yakapfuura, asi akaumbwa resin akadai sePP, PE, uye PA haasi nyore kubaya nekuda kwekusimba kwavo kwakanaka uye kusasimba kusimba, izvo zvinomisa kushanda kwavo mumunda wekurongedza kwakasimba, kunyanya mu. online kuzadza zvigadzirwa. Impact-resistant polystyrene HIPS ine yakanaka kuomarara uye yakanakisa kuumbwa zvivakwa, inokodzera kubaya uye yakakodzera kune yakaoma kurongedza zvinhu. Naizvozvo, zvinonyanya kukurumidza kusimudzira zvine simba EVOH yakakwira-barriers composite zvinhu zvakakodzera kurongedza zvakaoma.
Nekuda kwekusawirirana kwakashata pakati peEVOH resin neHIPS resin, uye musiyano mukuru weresin rheology rate, kusimba kwekubatana pakati pe substrate neEVOH, zvinodiwa pakusimba kweEVOH panguva yekuumbwa kwechipiri, uye EVOH layer yekugovera panguva yecalendering. gadzira mapepa akaumbwa Kufanana kwezvinhu zvakasanganiswa inyaya dzakakosha dzinokanganisa kushanda uye kushandiswa kwezvinhu zvakaumbwa, uye zvakare matambudziko akaoma anoda kugadziriswa pakugadzira rudzi urwu rwezvinhu zvakaumbwa.
Kiyi kune yakawanda-layer co-extrusion tekinoroji ndeyekunamatira (AD). Izvo zvinosanganiswa zvekurongedza zveEVOH zvinowanzo sanganisira PPEVOH, asi PP neEVOH haigone kusungwa zvakanangana nemafuta, uye chinonamira (AD) chinofanira kuwedzerwa pakati pePP neEVOH. Paunenge uchisarudza chinonamira, zvinodikanwa kuti titarise kunamira kwePP sechinhu chepasi, chechipiri ndechekufananidza kunyunguduka viscosity yePP neEVOH, uye chechitatu ndiko kudiwa kwezvinhu zvinorema, kuitira kudzivirira delamination panguva yechipiri. processing. Naizvozvo, iwo ma-co-extruded sheets kazhinji ari mashanu-layer co-extruded sheets (PPADEVOHADPP). / AD/EVOH/AD/R/PP, iyo yekunze dhizaini iPP zvinhu zvitsva, uye mamwe maviri akaturikidzana PP yakapwanyika yakadzokororwa zvinhu R(PP). Asymmetric chimiro chinogonawo kushandiswa, uye zvimwe zvinhu (PE / HIPS, nezvimwewo) extruders inogona kuwedzerwa kune co-extrusion. Nheyo yacho yakafanana, uye nzira imwechete ye-multi-layer co-extrusion inogona kuwanikwa.
Application
EVOH zvinhu zvine zvakanaka zvipingamupinyi zvivakwa. Kuburikidza neco-extrusion tekinoroji nePP, PE, PA, PETG uye zvimwe zvinhu, inogona kugadziriswa kuita 5-layer, 7-layer, uye 9-layer yakakwirira-barriers lightweight packaging materials, inonyanya kushandiswa muaseptic packaging, jelly drinks, Dairy products, chilled hove uye nyama zvigadzirwa packaging etc. Muchikamu chisiri chekudya, chinoshandiswa mumishonga, inoputika solvent packaging nemimwe minda, ine yakanakisa chipingamupinyi zvinhu, izvo zvinovandudza zvakanyanya pasherufu yezvigadzirwa.
