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Random copolymer polypropylene pipe special material (Nordic standard） pipe pressure resistance test unqualified

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.

Processing Machinery pressure resistance testpipe wall thicknessmaterial degradationcrystallinityplasticization quality

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

PE temperature window optimization needs to be advanced from two aspects: systematic experiments and experience accumulation.

Processing Machinery temperature optimizationPE gradeDOEprocess parameterstemperature database

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

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.

Processing Machinery filter screenimpuritiescarbidesbarrel temperaturescreen change frequency

Random copolymer polypropylene pipe special material (Nordic standard） extruded products inner wall roughness

Inner wall roughness is caused by low mandrel temperature or poor surface condition, and needs to be solved from temperature control and mold maintenance.

Processing Machinery inner wall roughnessmandrel temperaturemandrel polishingmelt temperatureplasticization quality

Random copolymer polypropylene pipe special material (Nordic standard） extruded products degradation discoloration

Degradation discoloration is caused by overheating or excessive shear, and needs to be prevented from three aspects: temperature control, rotational speed and material selection.

Processing Machinery degradation discolorationthermal degradationscrew speedresidence timeantioxidant

Random copolymer polypropylene pipe special material (Nordic standard） extruder screw design mismatch

Screw design needs to match material characteristics and product requirements; if necessary, customize a dedicated screw.

Processing Machinery screw designcompression ratioL/D ratiomixing elementsscrew matching

Random copolymer polypropylene pipe special material (Nordic standard） Random copolymer polypropylene pipe special material (Nordic standard） improper processing temperature window selection

Temperature window selection is the foundation of processing, and needs to be set reasonably according to material characteristics and actual operating experience.

Processing Machinery processing temperaturetemperature windowplasticization qualitymaterial degradationtemperature calibration

Random copolymer polypropylene pipe special material (Nordic standard） pipe cut end face uneven（Variant: Strengthened Measures）

Uneven cut end faces are caused by tool wear or improper cutting parameters, requiring tool maintenance and cutting process optimization.Targeted preventive measures need to be taken in different production scenarios.

Processing Machinery cut end facecutting toolcutting speedpipe coolingcutting machine calibration

Random copolymer polypropylene pipe special material (Nordic standard） extruder cooling system efficiency decline（Variant: Mass Production Scenario）

The decline in cooling efficiency is caused by insufficient water volume or excessive water temperature, requiring improvement of the cooling system and control of water temperature.Targeted preventive measures need to be taken in different production scenarios.

Processing Machinery cooling efficiencycooling water flowcooling water temperaturewater channel scalingcooling water tank

Random copolymer polypropylene pipe special material (Nordic standard） extruder sizing device failure（Variant: Mass Production Scenario）

Sizing device failure needs to be solved from three aspects: vacuum system, cooling system and mold precision.Targeted preventive measures need to be taken in different production scenarios.

Processing Machinery sizing devicevacuum degreesizing sleeve wearcooling watermold concentricity

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