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Uneven Wall Thickness of Polypropylene Extruded Pipe

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 Polypropylene PPR Pipe

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 Polypropylene Extruded Products

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

Extrusion & Post sharkskinmelt fracturedie temperatureextrusion speeddie polishing

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Bamboo Marks/Melt Fracture Appearing on the Surface of Polypropylene Extruded Products

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

Extrusion & Post melt fracturebamboo markcritical shear ratedie temperatureextrusion speed

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Flash/burrs appearing on polypropylene injection molded products

Flash is a manifestation of mismatch between the mold clamping force and the injection pressure, and needs to be controlled from three aspects: clamping force, injection pressure, and mold precision.

Extrusion & Post flashclamping forceinjection pressureparting linemold gap

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Unstable cooling line height of polyolefin plastomer films

Unstable cooling line is caused by fluctuations in cooling or extrusion conditions, and the air ring parameters and environmental conditions need to be stabilized.

Extrusion & Post cooling linefrost lineair ring stabilityextrusion temperatureambient airflow

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Gel particles/gel appearing in polyolefin plastomer films

Gel particles are caused by insufficient plasticization or raw material quality problems, and need to be solved from temperature control and raw material quality.

Extrusion & Post gel particlesgelplasticization temperaturescrew mixingscreen

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Ovality of polyolefin plastomer pipes exceeding the standard

Excessive ovality is caused by uneven cooling or external force deformation, and needs to be solved from cooling uniformity and pipe storage.

Extrusion & Post ovalityuniform coolingsizing sleevehauling clampingpipe storage

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Bending deformation of polyolefin plastomer extruded pipes

Pipe bending is caused by non-uniform cooling or hauling eccentricity, and needs to be solved from cooling uniformity and equipment alignment.

Extrusion & Post pipe bendinguneven coolinghauling alignmentuniform wall thicknessstraightness

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Uneven thickness of polyolefin plastomer cast films

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

Extrusion & Post cast filmuneven thicknessT-dielip gapair knife

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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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