Problem & Solution

Q

Random copolymer polypropylene pipe special material (Nordic standard） extruder frequent screen change/short filter screen life（Variant: Mass Production Scenario）

A

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

Processing Machinery filter screenimpuritiescarbidesbarrel temperaturescreen change frequency

Q

Random copolymer polypropylene pipe special material (Nordic standard） pipe pressure resistance test unqualified（Variant: Strengthened Measures）

A

Unqualified pressure resistance is caused by insufficient wall thickness, material degradation or internal defects, and needs to be systematically solved from process and material quality.Targeted preventive measures need to be taken in different production scenarios.

Processing Machinery pressure resistance testpipe wall thicknessmaterial degradationcrystallinityplasticization quality

Q

Random copolymer polypropylene pipe special material (Nordic standard） PE raw material wide temperature window causing process parameter optimization difficulty（Variant: Strengthened Measures）

A

PE temperature window optimization needs to be advanced from two aspects: systematic experiments and experience accumulation.Targeted preventive measures need to be taken in different production scenarios.

Processing Machinery temperature optimizationPE gradeDOEprocess parameterstemperature database

Q

Random copolymer polypropylene pipe special material (Nordic standard） extruder frequent screen change/short filter screen life（Variant: Strengthened Measures）

A

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

Processing Machinery filter screenimpuritiescarbidesbarrel temperaturescreen change frequency

Q

Random copolymer polypropylene pipe special material (Nordic standard） extruded products surface lusterless（Variant: Mass Production Scenario）

A

A lusterless surface is caused by low die temperature or too fast cooling, requiring increased die temperature and slowed cooling.Targeted preventive measures need to be taken in different production scenarios.

Processing Machinery lusterlessdie temperaturecooling ratedie polishingmelt temperature

Q

Random copolymer polypropylene pipe special material (Nordic standard） extruded products inner wall roughness（Variant: Mass Production Scenario）

A

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

Processing Machinery inner wall roughnessmandrel temperaturemandrel polishingmelt temperatureplasticization quality

Q

Random copolymer polypropylene pipe special material (Nordic standard） extruded products degradation discoloration（Variant: Mass Production Scenario）

A

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

Processing Machinery degradation discolorationthermal degradationscrew speedresidence timeantioxidant

Q

Random copolymer polypropylene pipe special material (Nordic standard） extruded products surface lusterless（Variant: Strengthened Measures）

A

A lusterless surface is caused by low die temperature or too fast cooling, requiring increased die temperature and slowed cooling.Targeted preventive measures need to be taken in different production scenarios.

Processing Machinery lusterlessdie temperaturecooling ratedie polishingmelt temperature

Q

Random copolymer polypropylene pipe special material (Nordic standard） extruded products inner wall roughness（Variant: Strengthened Measures）

A

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

Processing Machinery inner wall roughnessmandrel temperaturemandrel polishingmelt temperatureplasticization quality

Q

Random copolymer polypropylene pipe special material (Nordic standard） extruded products degradation discoloration（Variant: Strengthened Measures）

A

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

Processing Machinery degradation discolorationthermal degradationscrew speedresidence timeantioxidant

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