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Insufficient long-term hydrostatic strength of linear low-density polyethylene PPR pipes

Insufficient long-term hydrostatic strength is caused by material selection and processing quality and needs to be comprehensively controlled from raw materials, process and welding.

Extrusion & Post hydrostatic strengthPPRmolecular weightpipe wall thicknesscrystallinity

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Linear low-density polyethylene PPR pipe welding joint leakage

PPR welding joint leakage is caused by improper welding parameters or welding surface contamination; welding temperature, time and cleanliness need to be strictly controlled.

Material Analysis PPR weldinghot-melt weldingwelding temperaturewelding timefitting matching

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Sharkskin appearing on the surface of linear low-density polyethylene extruded products

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

Extrusion & Post sharkskinmelt fracturedie temperatureextrusion speeddie polishing

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Unstable cooling line height of linear low-density polyethylene film (variant: strengthened measures)

Cooling line instability is caused by fluctuations in cooling or extrusion conditions; air ring parameters and environmental conditions need to be stabilized. In different production scenarios, targeted preventive measures need to be taken.

Extrusion & Post cooling linefrost lineair ring stabilityextrusion temperatureambient airflow

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Bamboo grain/melt fracture appearing on the surface of linear low-density polyethylene extruded products

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

Extrusion & Post melt fracturebamboo graincritical shear ratedie temperatureextrusion speed

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Uneven cutting end face of linear low-density polyethylene pipes (variant: strengthened measures)

Uneven cutting end faces are caused by tool wear or improper cutting parameters; tools need to be maintained and the cutting process optimized. In different production scenarios, targeted preventive measures need to be taken.

Processing Machinery cutting end facecutting toolcutting speedpipe coolingcutting machine correction

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Gel particles/gel appearing in linear low-density polyethylene film (variant: strengthened measures)

Gel particles are caused by insufficient plasticization or raw material quality problems and need to be solved from temperature control and raw material quality. In different production scenarios, targeted preventive measures need to be taken.

Extrusion & Post gel particlegelplasticizing temperaturescrew mixingscreen

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Cooling system efficiency decline of linear low-density polyethylene extruder (variant: strengthened measures)

Cooling efficiency decline is caused by insufficient water volume or excessive water temperature; the cooling system needs to be improved and water temperature controlled. In different production scenarios, targeted preventive measures need to be taken.

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

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Sizing device failure of linear low-density polyethylene extruder (variant: strengthened measures)

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

Processing Machinery sizing devicevacuum degreesizing sleeve wearcooling watermold concentricity

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Unreasonable head flow channel design of linear low-density polyethylene extruder (variant: strengthened measures)

Head flow channel design needs to ensure uniform melt distribution and no stagnation; redesign the head if necessary. In different production scenarios, targeted preventive measures need to be taken.

Processing Machinery head flow channeluniform flow velocityland sectionflow channel dead zonetemperature uniformity

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Kategoriler

Tüm Konular 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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