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Difficult EVOH Purging

Processing Machinery EVOHpurging difficultyadhesionPE flushingdedicated purging compound

Coarse Internal Crystallization of EVOH

Molding Process EVOHcoarse crystallizationspherulite refinementnucleating agentcooling rate

Unstable Weight of EVOH Injection Molded Products

Product weight stability depends on shot volume precision and holding consistency

Injection Molding EVOH injectionweight fluctuationshot volumeholding consistencyV/P switchover

Weak Interfacial Adhesion in EVOH Coextrusion

EVOH/PE interface polarity difference is large; a tie layer must be used to solve it

Extrusion & Post EVOH/PE coextrusiontie layerPE-g-MAHinterfacial polarity differenceEAA tie layer

EVOH Extruded Pipe Ovality Out of Specification

Extrusion & Post EVOH pipeovalityannular coolingvacuum sizinguniform haul-off

Poor EVOH Weather Resistance

Material Analysis EVOHweather resistanceUV absorberHALSphoto-oxidation

Large Current Fluctuation of EVOH Extruder

Extrusion & Post EVOH extrusioncurrent fluctuationtemperature control precisionscrew designfeeding stability

Gel Particles on EVOH Extruded Film

Extrusion & Post EVOH filmgel particlemelting temperaturemixing sectionhigh molecular weight component

Transverse Ripples on EVOH Extruded Film

Extrusion & Post EVOH filmtransverse ripplehaul-off vibrationchill roll eccentricitypressure stabilizing device

Frequent Screen Clogging in EVOH Extrusion

Extrusion & Post EVOH extrusionscreen clogginggel particlestepped screenautomatic screen change

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