Problem & Solution

Q

Heat-resistant polyethylene extruder screw design mismatch (Variant: strengthened measures)

A

Screw design needs to match material characteristics and product requirements, and a dedicated screw should be customized when necessary. Targeted preventive measures need to be taken in different production scenarios.

Processing Machinery screw designcompression ratiolength-to-diameter ratiomixing elementscrew matching

Q

Heat-resistant polyethylene extruded products show degradation discoloration (Variant: mass production scenario)

A

Degradation discoloration is caused by overheating or excessive shear, and needs to be prevented from the three aspects of 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

Glossless surface of heat-resistant polyethylene extruded products (Variant: strengthened measures)

A

Glossless surface is caused by low die temperature or too fast cooling, and the die temperature needs to be increased and the cooling slowed down. In different production scenarios, targeted preventive measures need to be taken.

Processing Machinery glossless die temperature cooling rate die polishing melt temperature

Q

Improper production environment control during processing of heat-resistant polyethylene heat-resistant polyethylene (Variant: strengthened measures)

A

The production environment is an important factor affecting the processing quality, and a sound environmental control system needs to be established. In different production scenarios, targeted preventive measures need to be taken.

Material Drying environmental control workshop temperature humidity cooling water temperature process stability

Q

Bubbles/gas pores on the surface of heat-resistant polyethylene extruded products (Variant: mass production scenario)

A

Bubbles are caused by water vaporization or gas entrainment, and need to be solved from raw '2079851475616104451 and venting system. In different production scenarios, targeted preventive measures need to be taken.

Material Drying bubble gas pore raw '2079851475616104451 venting volatiles

Q

Rough inner wall of heat-resistant polyethylene extruded products (Variant: strengthened measures)

A

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

Processing Machinery rough inner wall mandrel temperature mandrel polishing melt temperature plasticization quality

Q

Degradation discoloration of heat-resistant polyethylene extruded products (Variant: strengthened measures)

A

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

Processing Machinery degradation discoloration thermal degradation screw speed residence time antioxidant

Q

Defects caused by insufficient drying before processing of heat-resistant polyethylene heat-resistant polyethylene (Variant: strengthened measures)

A

Insufficient drying is a common root cause of processing defects, and a sound drying system and moisture content inspection system need to be established. In different production scenarios, targeted preventive measures need to be taken.

Material Drying raw '2079851475616104451 moisture content silver streak bubble dehumidifying drying

Q

Cyclic pressure fatigue failure of heat-resistant polyethylene PPR pipes (Variant: strengthened measures)

A

Fatigue failure is caused by internal defects and stress concentration, and needs to be improved from three aspects: pipe inner wall quality, welding quality, and material toughness. In different production scenarios, targeted preventive measures need to be taken.

Extrusion & Post fatigue failure PPR stress concentration inner wall quality welding bead

Q

Bubbles/gas pores on the surface of heat-resistant polyethylene extruded products (Variant: strengthened measures)

A

Bubbles are caused by water vaporization or gas entrainment, and need to be solved from raw '2079851475616104451 and venting system. In different production scenarios, targeted preventive measures need to be taken.

Material Drying bubble gas pore raw '2079851475616104451 venting volatiles

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