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Uneven wall thickness of linear low-density polyethylene extruded pipes

Uneven wall thickness is caused by uneven die gap or uneven temperature and needs to be solved from mold precision and temperature uniformity.

Extrusion & Post uneven wall thicknessdie concentricitytemperature uniformityhaul-off stabilitysizing sleeve

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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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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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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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Ovality of linear low-density polyethylene pipes exceeding standard (variant: strengthened measures)

Ovality exceeding the standard is caused by uneven cooling or external force deformation and needs to be solved from cooling uniformity and pipe storage. In different production scenarios, targeted preventive measures need to be taken.

Extrusion & Post ovalityuniform coolingsizing sleevehaul-off clampingpipe storage

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Bending deformation of linear low-density polyethylene extruded pipes (variant: strengthened measures)

Pipe bending is caused by non-uniform cooling or haul-off eccentricity and needs to be solved from cooling uniformity and equipment alignment. In different production scenarios, targeted preventive measures need to be taken.

Extrusion & Post pipe bendinguneven coolinghaul-off alignmentuniform wall thicknessstraightness

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Uneven thickness of linear low-density polyethylene cast film (variant: strengthened measures)

Uneven cast film thickness is caused by uneven die gap or temperature and needs to be solved from mold precision and temperature uniformity. In different production scenarios, targeted preventive measures need to be taken.

Extrusion & Post cast filmuneven thicknessT-dielip gapair knife

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Wrinkles appearing in linear low-density polyethylene blown film (variant: strengthened measures)

Wrinkles are caused by uneven thickness or unbalanced hauling and need to be solved from thickness control, haul-off and herringbone plate adjustment. In different production scenarios, targeted preventive measures need to be taken.

Extrusion & Post film wrinklesuneven thicknesshaul-off rollerherringbone platecooling line

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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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