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Yaygın plastik malzeme zorluklarına pratik yanıtlar

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Thermal aging performance of polyolefin plastomer PPR pipes not meeting standard (Variant: strengthened measures)

Failure of thermal aging performance to meet standards is caused by insufficient antioxidant system, and needs to be solved from formulation and processing temperature control. Targeted preventive measures need to be taken in different production scenarios.

Extrusion & Post thermal agingantioxidantPPRoxidation induction timeextrusion temperature

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Melt flow rate mismatch of raw material for polyolefin plastomer extrusion (Variant: strengthened measures)

MFR mismatch needs to be solved by selecting suitable grades and adjusting temperature parameters. Targeted preventive measures need to be taken in different production scenarios.

Extrusion & Post melt flow rategrade selectionextrusion gradeprocess adjustmentbatch detection

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Uneven wall thickness of polyolefin plastomer extruded pipes (Variant: strengthened measures)

Uneven wall thickness is caused by uneven die gap or uneven temperature, and needs to be solved from mold accuracy and temperature uniformity. Targeted preventive measures need to be taken in different production scenarios.

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

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Insufficient long-term hydrostatic strength of polyolefin plastomer PPR pipes (Variant: strengthened measures)

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. Targeted preventive measures need to be taken in different production scenarios.

Extrusion & Post hydrostatic strengthPPRmolecular weightpipe wall thicknesscrystallinity

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Sharkskin appears on the surface of polyolefin plastomer extruded products (Variant: strengthened measures)

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. Targeted preventive measures need to be taken in different production scenarios.

Extrusion & Post sharkskinmelt fracturedie temperatureextrusion speeddie polishing

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Bamboo-node pattern/melt fracture appears on the surface of polyolefin plastomer extruded products (Variant: strengthened measures)

Melt fracture is flow instability caused by extrusion speed exceeding the critical value, and the speed needs to be reduced, the temperature increased and the die design optimized. Targeted preventive measures need to be taken in different production scenarios.

Extrusion & Post melt fracturebamboo-node patterncritical shear ratedie temperatureextrusion speed

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Heat-resistant polyethylene pipe ovality exceeding 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 sleevehaul-off clampingpipe storage

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Bending deformation of heat-resistant polyethylene extruded pipes

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

Extrusion & Post pipe bendinguneven coolinghaul-off alignmentuniform wall thicknessstraightness

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Die marks/lines appear on heat-resistant polyethylene extruded products

Die marks are caused by die inner wall damage or impurities, and the die condition needs to be regularly cleaned and inspected.

Extrusion & Post die markdie scratchimpurity cleaningflow channel designscreen pack

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Heat-resistant polyethylene heat-resistant polyethylene process linkage problem when switching production between different processing methods

Production changeover linkage needs advance planning and full preparation; the key is to clarify the differentiated requirements of different processing methods for materials.

Extrusion & Post production changeoverprocessing methodprocess parametersmaterial gradetrial production verification

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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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