Problema e solução

Respostas práticas para os desafios comuns dos materiais plásticos

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Q

LLDPE printing adhesion

A

Printing relies on corona and ink matching; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence; include this case in the defect archive as a reference for troubleshooting similar problems in the future

Extrusion & Post LLDPEprintingadhesionink

Q

LLDPE corona decay

A

Manage corona effect by aging; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence; include this case in the defect archive as a reference for troubleshooting similar problems in the future

Extrusion & Post LLDPEcoronadyne valueaging

Q

LLDPE film wrinkling

A

The root of wrinkling lies in thickness uniformity; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence; include this case in the defect archive as a reference for troubleshooting similar problems in the future

Extrusion & Post LLDPEwrinklingwindingtension

Q

LLDPE bubble spiral instability

A

LLDPE spiral instability is a direct consequence of extensional softness; dual-lip air ring plus low air speed is the standard countermeasure; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence

Extrusion & Post LLDPE;spiral instability;bubble;dual-lip air ring;air speed

Q

LLDPE blown film sharkskin

A

LLDPE sharkskin is harder to cure than LDPE; raising die temperature, changing melt index and adding PPA often need to be combined; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence

Extrusion & Post LLDPE;sharkskin;melt fracture;die temperature;PPA

Q

LLDPE blown film transverse tear

A

LLDPE transverse tear is opened up by the blow-up ratio; the 2-4 times range plus dual-lip air ring setting is the standard combination; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence

Extrusion & Post LLDPE;transverse tear;blow-up ratio;dual-lip air ring

Q

LLDPE blown film machine-direction strength

A

LLDPE machine-direction strength is pulled by the draw ratio; the 1.5-3 times orientation range plus temperature protection is needed to realize the performance advantage; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence

Extrusion & Post LLDPE;machine-direction strength;draw ratio;orientation;temperature

Q

LLDPE film gel particles

A

LLDPE gel management prioritizes filtration; narrow-MWD grades require higher filtration precision; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence

Extrusion & Post LLDPE;gel;gel particle;filtration;recycled material

Q

LLDPE high melt fracture sensitivity

A

LLDPE is a material prone to melt fracture; enlarging die gap, raising temperature and PPA together are needed for a complete cure; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence

Extrusion & Post LLDPE;melt fracture;sharkskin;high sensitivity;PPA

Q

LLDPE environmental friendliness

A

LLDPE's recycling value is realized through design; single material plus standardized marking is the foundation of green packaging; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence

Extrusion & Post LLDPE;recycling;code 4;single material;marking

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