Problem & Solution

Q

Pressure test failure of random copolymer polypropylene pipe special material pipes (Variant: strengthened measures)

A

Pressure test failure is caused by insufficient wall thickness, material degradation, or internal defects, and needs to be systematically solved from process and material quality. In different production scenarios, targeted preventive measures need to be taken.

Processing Machinery pressure test pipe wall thickness material degradation crystallinity plasticization quality

Q

Frequent screen change/short filter screen life of random copolymer polypropylene pipe special material extruder (Variant: mass production scenario)

A

Frequent filter screen blockage is caused by raw material impurities or improper process, and needs to be solved from raw material management and temperature control. In different production scenarios, targeted preventive measures need to be taken.

Processing Machinery filter screen impurities carbonized material barrel temperature screen change frequency

Q

Wide temperature window of random copolymer polypropylene pipe special material PE raw material causing difficulty in process parameter optimization (Variant: strengthened measures)

A

PE temperature window optimization needs to be promoted from two aspects: systematic experiments and experience accumulation. In different production scenarios, targeted preventive measures need to be taken.

Processing Machinery temperature optimization PE grade DOE process parameters temperature database

Q

Frequent screen change/short filter screen life of random copolymer polypropylene pipe special material extruder (Variant: strengthened measures)

A

Frequent filter screen blockage is caused by raw material impurities or improper process, and needs to be solved from raw material management and temperature control. In different production scenarios, targeted preventive measures need to be taken.

Processing Machinery filter screen impurities carbonized material barrel temperature screen change frequency

Q

Glossless surface of random copolymer polypropylene pipe special material extruded products (Variant: mass production scenario)

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

Rough inner wall of random copolymer polypropylene pipe special material extruded products (Variant: mass production scenario)

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 random copolymer polypropylene pipe special material extruded products (Variant: mass production scenario)

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

Screw design mismatch of random copolymer polypropylene pipe special material extruder (Variant: mass production scenario)

A

The screw design needs to match the material characteristics and product requirements, and a special screw needs to be customized if necessary. In different production scenarios, targeted preventive measures need to be taken.

Processing Machinery screw design compression ratio L/D ratio mixing elements screw matching

Q

Screw design mismatch of random copolymer polypropylene pipe special material extruder (Variant: strengthened measures)

A

The screw design needs to match the material characteristics and product requirements, and a special screw needs to be customized if necessary. In different production scenarios, targeted preventive measures need to be taken.

Processing Machinery screw design compression ratio L/D ratio mixing elements screw matching

Q

Improper selection of the processing temperature window for random copolymer polypropylene pipe special material random copolymer polypropylene pipe special material (Variant: strengthened measures)

A

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

Processing Machinery processing temperature temperature window plasticization quality material degradation temperature calibration

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