Problema e solução

Respostas práticas para os desafios comuns dos materiais plásticos

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Q

General-purpose polyethylene injection molded products uneven surface gloss（Variant: Strengthened Measures）

A

Uneven gloss reflects inconsistency between the mold surface state and melt flow, and needs improvement from three aspects: mold polishing, temperature uniformity and injection process.Targeted preventive measures need to be taken in different production scenarios.

Injection Molding uneven glossmold polishingtemperature uniformityinjection speedcooling system

Q

General-purpose polyethylene injection molded products weld lines（Variant: Strengthened Measures）

A

Weld lines are a manifestation of poor melt convergence and fusion, improving melt fusion quality by increasing melt temperature, injection speed and mold temperature.Targeted preventive measures need to be taken in different production scenarios.

Injection Molding weld linemelt convergenceinjection speedmold temperaturegate design

Q

General-purpose polyethylene injection molded products surface bubbles/voids（Variant: Strengthened Measures）

A

Bubbles and voids are mainly caused by moisture vaporization, gas entrainment or insufficient feeding, and need to be systematically solved from raw '2079851475616104451, injection process and holding pressure parameters.Targeted preventive measures need to be taken in different production scenar...

Material Drying bubblesvoidsraw '2079851475616104451holding pressuremulti-stage injection

Q

General-purpose polyethylene injection molded products warpage deformation（Variant: Strengthened Measures）

A

Warpage deformation is the core difficulty of crystalline materials in '2079851475616104452; its essence is internal stress caused by non-uniform shrinkage, requiring systematic control from multiple dimensions: design, process and mold.Targeted preventive measures need to be taken in different p...

Injection Molding warpage deformationcrystallization shrinkagemold temperature uniformitywall thickness uniformitycooling time

Q

General-purpose polyethylene injection molded products surface silver streaks/material streaks（Variant: Strengthened Measures）

A

Silver streaks are mainly caused by moisture in the raw material, thermal degradation or poor venting, requiring systematic investigation from three aspects: raw '2079851475616104451, temperature control and mold venting.Targeted preventive measures need to be taken in different production scenar...

Material Drying silver streaksmaterial streaksraw '2079851475616104451thermal degradationmold venting

Q

General-purpose polyethylene injection molded products sink marks at thick-wall areas（Variant: Strengthened Measures）

A

Sink marks are a typical defect of crystalline materials in '2079851475616104452; the root cause is that local volume shrinkage is not effectively fed, and it needs to be solved coordinately from three aspects: holding pressure parameters, gate design and cooling conditions.Targeted preventive me...

Injection Molding sink markholding pressurecrystallization shrinkagegate designwall thickness uniformity

Q

Metallocene linear low density polyethylene film cooling line height instability

A

Cooling line instability is caused by fluctuations in cooling or extrusion conditions, requiring stabilization of air ring parameters and environmental conditions.

Extrusion & Post cooling linefrost lineair ring stabilityextrusion temperatureambient airflow

Q

Metallocene linear low density polyethylene film gel particles/gel granules

A

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 particlesgelplasticizing temperaturescrew mixingfilter screen

Q

Metallocene linear low density polyethylene MLLDPE excessive gel/gel particles

A

MLLDPE gel particles are caused by insufficient plasticization, requiring increased processing temperature and strengthened filtration.

Processing Machinery MLLDPEgel particlesplasticizing temperaturefilter screenscrew mixing

Q

Metallocene linear low density polyethylene cast film uneven thickness

A

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

Extrusion & Post cast filmuneven thicknessT-dielip gapair knife

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