Problem & Solution

Q

Improper processing temperature window selection for metallocene linear low-density polyethylene metallocene linear low-density polyethylene (variant: strengthened measures)

A

Temperature window selection is the foundation of processing and needs to be reasonably set according to material characteristics and actual operating experience. In different production scenarios, targeted preventive measures need to be taken.

Processing Machinery processing temperaturetemperature windowplasticization qualitymaterial degradationtemperature calibration

Q

Metallocene linear low-density polyethylene MLLDPE high extrusion torque/high energy consumption (variant: mass production scenario)

A

MLLDPE high energy consumption is caused by narrow molecular weight distribution and high melt viscosity and needs to be solved by optimizing screw design, increasing temperature and adding processing aids. In different production scenarios, targeted preventive measures need to be taken.

Extrusion & Post MLLDPEscrew torquemolecular weight distributionprocessing aidextrusion energy consumption

Q

Metallocene linear low-density polyethylene MLLDPE high extrusion torque/high energy consumption (variant: startup commissioning scenario)

A

MLLDPE high energy consumption is caused by narrow molecular weight distribution and high melt viscosity and needs to be solved by optimizing screw design, increasing temperature and adding processing aids. In different production scenarios, targeted preventive measures need to be taken.

Extrusion & Post MLLDPEscrew torquemolecular weight distributionprocessing aidextrusion energy consumption

Q

Metallocene linear low-density polyethylene MLLDPE high extrusion torque/high energy consumption (variant: strengthened measures)

A

MLLDPE high energy consumption is caused by narrow molecular weight distribution and high melt viscosity and needs to be solved by optimizing screw design, increasing temperature and adding processing aids. In different production scenarios, targeted preventive measures need to be taken.

Extrusion & Post MLLDPEscrew torquemolecular weight distributionprocessing aidextrusion energy consumption

Q

Unstable cooling line height of linear low-density polyethylene film

A

Cooling line instability is caused by fluctuations in cooling or extrusion conditions; air ring parameters and environmental conditions need to be stabilized.

Extrusion & Post cooling linefrost lineair ring stabilityextrusion temperatureambient airflow

Q

Uneven cutting end face of linear low-density polyethylene pipes

A

Uneven cutting end faces are caused by tool wear or improper cutting parameters; tools need to be maintained and the cutting process optimized.

Processing Machinery cutting end facecutting toolcutting speedpipe coolingcutting machine correction

Q

Gel particles/gel appearing in linear low-density polyethylene film

A

Gel particles are caused by insufficient plasticization or raw material quality problems and need to be solved from temperature control and raw material quality.

Extrusion & Post gel particlegelplasticizing temperaturescrew mixingscreen

Q

Cooling system efficiency decline of linear low-density polyethylene extruder

A

Cooling efficiency decline is caused by insufficient water volume or excessive water temperature; the cooling system needs to be improved and water temperature controlled.

Production & Quality cooling efficiencycooling water flowcooling water temperaturewater passage scalingcooling water tank

Q

Sizing device failure of linear low-density polyethylene extruder

A

Sizing device failure needs to be solved from three aspects: vacuum system, cooling system and mold precision.

Molding Process sizing devicevacuum degreesizing sleeve wearcooling watermold concentricity

Q

Unreasonable head flow channel design of linear low-density polyethylene extruder

A

Head flow channel design needs to ensure uniform melt distribution and no stagnation; redesign the head if necessary.

Production & Quality head flow channeluniform flow velocityland sectionflow channel dead zonetemperature uniformity

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