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문제 및 해결책

일반적인 플라스틱 재료 문제에 대한 실질적인 답변

2239 질문
Q
Delamination in PU Blending with Incompatible Resins
A
Blends with large polarity difference require reactive compatibilizer to form chemical bonding at the interface to solve it
Extrusion & Post PU blend delaminationpolarity differencePU-g-MAHreactive compatibilizationinterfacial bonding
Q
Die Buildup and Carbon Deposit in PU Extrusion
A
Die carbon deposit is caused by thermal oxidation and untimely cleaning; PE flushing and timely cleaning are key
Extrusion & Post PU extrusiondie carbon depositPE flushingstagnation zonethermal oxidation
Q
Pellet Sticking in PU Extrusion Pelletizing
A
Pellet sticking is caused by elastic recovery and low-temperature pelletizing; high-temperature water cutting and fast cutting are key
Extrusion & Post PU pelletizingpellet stickingpelletizing water temperaturecutter speedelastic recovery
Q
Melt Fracture in PU Extrusion
Q
EVOH Surface Snakeskin Pattern
A
Snakeskin pattern is caused by low-temperature extrusion and elastic recovery; raising temperature and reducing speed are key
Extrusion & Post EVOHsnakeskin patternextrusion temperatureelastic recoverydie temperature control
Q
EVOH Internal Delamination Cracking
A
Internal delamination is caused by poor interface and shrinkage differences; compatibilizer and uniform cooling are key
Extrusion & Post EVOHinternal delaminationinterfacial adhesioncompatibilizeruniform cooling
Q
EVOH Screw Slippage
A
Screw slippage is caused by premature melting; cooling the feed section is key
Extrusion & Post EVOHscrew slippagefeed section temperaturepremature meltingflight deepening
Q
Large EVOH Dimensional Change with Temperature
A
Dimensional temperature sensitivity is caused by large coefficient of thermal expansion; adding filler and annealing are key
Extrusion & Post EVOHdimensional temperature sensitivitycoefficient of thermal expansionrigid fillerannealing
Q
Dense EVOH Surface Pits
A
Pits are caused by raw material impurities and mold damage; pure raw material and mold maintenance are key
Extrusion & Post EVOHsurface pitimpurity particlemold repairraw material purity
Q
Material Overflow at EVOH Vacuum Vent
A
Overflow is caused by low melt viscosity; cooling and adding baffle are key
Extrusion & Post EVOHvacuum vent overflowmelt viscositycoolingvent baffle
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