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Random copolymer polypropylene pipe special material (Nordic standard） Random copolymer polypropylene pipe special material (Nordic standard） defects caused by insufficient drying before processing

Insufficient drying is a common root cause of processing defects, requiring the establishment of a sound drying system and moisture content testing system.

Material Drying raw '2079851475616104451moisture contentsilver streaksbubblesdehumidifying drying

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） PPR pipe welded joint leakage

PPR welded joint leakage is caused by improper welding parameters or welding surface contamination, requiring strict control of welding temperature, time and cleanliness.

Material Analysis PPR weldinghot-melt weldingwelding temperaturewelding timefitting matching

Random copolymer polypropylene pipe special material (Nordic standard） extruded products surface bamboo marks/melt fracture

Melt fracture is flow instability caused by the extrusion speed exceeding the critical value, requiring reduced speed, increased temperature and optimized die design.

Extrusion & Post melt fracturebamboo markscritical shear ratedie temperatureextrusion speed

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） extruded products surface sharkskin marks

Sharkskin marks are the result of stick-slip flow of the melt at the die exit, and are improved by increasing the die temperature and reducing the extrusion speed.

Extrusion & Post sharkskinmelt fracturedie temperatureextrusion speeddie polishing

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

Random copolymer polypropylene pipe special material (Nordic standard） extruder die head runner design unreasonable（Variant: Mass Production Scenario）

The die head runner design needs to ensure uniform melt distribution and no stagnant material; if necessary, redesign the die head.Targeted preventive measures need to be taken in different production scenarios.

Molds & Tooling die head runneruniform flow velocityland sectionrunner dead cornertemperature uniformity

Random copolymer polypropylene pipe special material (Nordic standard） extruded products mechanical properties substandard（Variant: Mass Production Scenario）

Substandard mechanical properties are caused by material degradation or poor processing quality, and need to be solved from temperature control and plasticization quality.Targeted preventive measures need to be taken in different production scenarios.

Processing Machinery mechanical propertiesmaterial degradationplasticization qualitycrystallinityregrind ratio

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Alle Themen 11636 Material Drying 1439 Injection Molding 1506 Molding Process 740 Molds & Tooling 1506 Processing Machinery 2025 Extrusion & Post 2239 Blow Molding 315 Thermoforming 141 Material Analysis 1343 Production & Quality 382

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