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
The barrier properties of EVOH The barrier properties of polymer materials inoreva kudzivirira kukwanisa kwezvigadzirwa kune madiki mamorekuru magasi, zvinwiwa, mhute yemvura, etc. Parizvino marudzi eresin anowanzo shandiswa ane zvinhu zvakanaka zvinodzivirira 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 kusaomarara kusimba, izvo zvinomisa kushanda kwavo mumunda wekurongedza kwakasimba, kunyanya mune zvigadzirwa zvekuzadza online. 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 mutsauko mukuru muresin rheology rate, simba rekubatanidza pakati pe substrate neEVOH, zvinodiwa kune tensile zvivakwa zveEVOH panguva yekuumbwa kwechipiri, uye EVOH layer yekugovera panguva yecalender kugadzira mashizha akaumbwa. yakagadziriswa pakugadzira rudzi urwu rwezvinhu zvakasanganiswa.
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 ndiko kuenzanisa kwekunyunguduka viscosity yePP neEVOH, uye chechitatu ndicho chinodiwa chekusimba zvivakwa, kuitira kudzivirira delamination panguva yechipiri kugadzirisa. 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 nezvimwe zvinhu, inogona kugadziriswa kuita 5-layer, 7-layer, uye 9-layer high-barrier lightweight packaging materials, inonyanya kushandiswa muaseptic packaging, jelly drinks, dairy products, chilled hove uye nyama zvigadzirwa kurongedza nezvimwewo. kurongedza uye mamwe minda, ine yakanakisa zvipingamupinyi zvivakwa, izvo zvinovandudza zvakanyanya hupenyu hwesherufu yezvigadzirwa.
