Problem & Solution

Q

Rough inner wall of linear low density polyethylene extruded products (Variant: mass production scenario)

A

Rough inner wall is caused by low mandrel temperature or poor surface condition; it needs to be solved from temperature control and mold maintenance. Targeted preventive measures need to be taken in different production scenarios.

Processing Machinery rough inner wallmandrel temperaturemandrel polishingmelt temperatureplasticizing quality

Q

Degradation discoloration of linear low density polyethylene extruded products (Variant: mass production scenario)

A

Degradation discoloration is caused by overheating or excessive shear; it needs to be prevented from three aspects: temperature control, rotation speed, and material selection. Targeted preventive measures need to be taken in different production scenarios.

Processing Machinery degradation discolorationthermal degradationscrew rotation speedresidence timeantioxidant

Q

Dull surface of linear low density polyethylene extruded products (Variant: strengthened measures)

A

Dull surface is caused by low die temperature or too fast cooling; die temperature needs to be increased and cooling slowed. Targeted preventive measures need to be taken in different production scenarios.

Processing Machinery no glossdie temperaturecooling ratedie polishingmelt temperature

Q

Linear low density polyethylene extruder screw design mismatch (Variant: strengthened measures)

A

Screw design needs to match material characteristics and product requirements; custom dedicated screws when necessary. Targeted preventive measures need to be taken in different production scenarios.

Processing Machinery screw designcompression ratioL/D ratiomixing elementsscrew matching

Q

Rough inner wall of linear low density polyethylene extruded products (Variant: strengthened measures)

A

Rough inner wall is caused by low mandrel temperature or poor surface condition; it needs to be solved from temperature control and mold maintenance. Targeted preventive measures need to be taken in different production scenarios.

Processing Machinery rough inner wallmandrel temperaturemandrel polishingmelt temperatureplasticizing quality

Q

Degradation discoloration of linear low density polyethylene extruded products (Variant: strengthened measures)

A

Degradation discoloration is caused by overheating or excessive shear; it needs to be prevented from three aspects: temperature control, rotation speed, and material selection. Targeted preventive measures need to be taken in different production scenarios.

Processing Machinery degradation discolorationthermal degradationscrew rotation speedresidence timeantioxidant

Q

Improper processing temperature window selection for linear low density polyethylene linear low density polyethylene (Variant: strengthened measures)

A

Temperature window selection is the foundation of processing; it needs to be reasonably set according to material characteristics and practical operation experience. Targeted preventive measures need to be taken in different production scenarios.

Processing Machinery processing temperaturetemperature windowplasticizing qualitymaterial degradationtemperature calibration

Q

Leakage of linear low density polyethylene PPR pipe welding joints (Variant: strengthened measures)

A

PPR welding joint leakage is caused by improper welding parameters or welding surface contamination; welding temperature, time, and cleanliness need to be strictly controlled. Targeted preventive measures need to be taken in different production scenarios.

Processing Machinery PPR weldinghot-melt weldingwelding temperaturewelding timefitting matching

Q

Uneven cutting end face of low density polyethylene pipes

A

Uneven cutting end face is caused by tool wear or improper cutting parameters; tools need maintenance and cutting process optimization.

Processing Machinery cutting end facecutting toolcutting speedpipe coolingcutting machine calibration

Q

Excessive gels/gel particles in low density polyethylene extruded products

A

Gels are caused by insufficient plasticization or raw material quality problems; they need to be solved from temperature control, screw design, and raw material selection.

Processing Machinery gelgel particleplasticizing temperaturescrew mixingfilter screen mesh count

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