Problema y solución

Respuestas prácticas a los desafíos comunes de los materiales plásticos

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Excessive shrinkage of linear low-density polyethylene extruded products (variant: strengthened measures)

Excessive shrinkage is caused by high crystallinity or high temperature and needs to be solved by controlling temperature and cooling rate. In different production scenarios, targeted preventive measures need to be taken.

Extrusion & Post shrinkage ratecrystallinitymelt temperaturecooling ratehaul-off speed

Linear low-density polyethylene PE raw material has a wide temperature window, making process parameter optimization difficult (variant: strengthened measures)

PE temperature window optimization needs to be advanced from two aspects: systematic experiments and experience accumulation. In different production scenarios, targeted preventive measures need to be taken.

Processing Machinery temperature optimizationPE gradeDOEprocess parameterstemperature database

Frequent screen change/short filter screen life of linear low density polyethylene extruder (Variant: strengthened measures)

Frequent filter screen clogging is caused by raw material impurities or improper process; it needs to be solved from raw material management and temperature control. Targeted preventive measures need to be taken in different production scenarios.

Processing Machinery filter screenimpuritiescarbidesbarrel temperaturescreen change frequency

Poor printability of linear low density polyethylene film (Variant: strengthened measures)

Poor printability is caused by low surface energy; ink adhesion needs to be improved by increasing surface tension through corona treatment. Targeted preventive measures need to be taken in different production scenarios.

Extrusion & Post printabilitysurface energycorona treatmentink adhesionsurface tension

Longitudinal reversion of linear low density polyethylene pipes exceeding standard (Variant: strengthened measures)

Excessive reversion is caused by large internal stress or excessive orientation; it needs to be solved from temperature control, cooling rate, and haul-off speed. Targeted preventive measures need to be taken in different production scenarios.

Extrusion & Post longitudinal reversioninternal stresscooling ratehaul-off speedmolecular orientation

Insufficient heat seal strength of linear low density polyethylene film (Variant: strengthened measures)

Insufficient heat seal strength is caused by improper temperature, pressure, or time settings; heat seal process parameters need to be optimized. Targeted preventive measures need to be taken in different production scenarios.

Processing Machinery heat seal strengthheat seal temperatureheat seal pressurefilm thicknessheat seal material

Unstable output/surging in linear low density polyethylene extrusion process (Variant: strengthened measures)

Unstable output is caused by unstable solids conveying; barrel temperature and feeding system need to be optimized. Targeted preventive measures need to be taken in different production scenarios.

Extrusion & Post unstable outputsurgingsolids conveyinghopper bridgingscrew rotation speed

Dimensional fluctuation of linear low density polyethylene extruded products (Variant: strengthened measures)

Dimensional fluctuation is caused by unstable extrusion or haul-off; all process parameters need to be systematically stabilized. Targeted preventive measures need to be taken in different production scenarios.

Extrusion & Post dimensional fluctuationscrew rotation speedhaul-off speedtemperature stabilityuniform feeding

Rough inner wall of linear low density polyethylene extruded products (Variant: mass production scenario)

Rough inner wall is caused by low mandrel temperature or poor surface condition; it needs to be solved from temperature control and mold maintenance. Targeted preventive measures need to be taken in different production scenarios.

Processing Machinery rough inner wallmandrel temperaturemandrel polishingmelt temperatureplasticizing quality

Degradation discoloration of linear low density polyethylene extruded products (Variant: mass production scenario)

Degradation discoloration is caused by overheating or excessive shear; it needs to be prevented from three aspects: temperature control, rotation speed, and material selection. Targeted preventive measures need to be taken in different production scenarios.

Processing Machinery degradation discolorationthermal degradationscrew rotation speedresidence timeantioxidant

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