Problem & Solution

Practical answers to common plastic material challenges

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Q

LDPE Film Bubble Spiral

A

For film bubble spiral check output and airflow uniformity; after confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence; include this case in the defect archive as a troubleshooting reference for similar problems in the future

Extrusion & Post LDPEfilm bubblespiralair ring

Q

LDPE Film Gel Particle

A

Gel particles are the deadly enemy of film appearance; filtration plus sorting plus cleaning, three defense lines to protect transparency; after confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence

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

Q

LDPE Fine Powder Slip Agent

A

Fine powder slip agent is a hidden trap of the LDPE conveying system; check the hopper first for abnormal fluctuations, and do not blindly adjust the speed; after confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence

Extrusion & Post LDPE;fine powder;slip agent;hopper;output fluctuation

Q

PPA Application for LDPE

A

PPA lets LDPE have both high speed and high quality; dosage strategy and purging speed are the key points of selection; after confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence

Extrusion & Post LDPE;PPA;fluoroelastomer;purging;coating

Q

LDPE Film Sharkskin

A

The essence of sharkskin is the shear critical; the three routes of raising die temperature, changing melt index, and adding PPA are selected according to cost; after confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence

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

Q

LDPE Film Longitudinal Strength

A

Longitudinal strength is pulled by the haul-off ratio; the 1.5-3 times orientation range plus temperature protection naturally meets performance standards; after confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence

Extrusion & Post LDPE;film;longitudinal strength;haul-off ratio;orientation

Q

LDPE Blown Film Opening Property

A

Opening property is a basic function of the film; the three elements of antiblock agent, temperature, and cooling determine film layer separation; after confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence

Extrusion & Post LDPE;blown film;opening property;blocking;antiblock agent

Q

LDPE Blown Film Wrinkling

A

Blown film wrinkling is a geometric alignment problem; calibrate the collapsing frame, nip roller, and rotation speed in three places; after confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence

Extrusion & Post LDPE;blown film;wrinkling;collapsing frame;nip roller

Q

LDPE Blown Film Thickness Band

A

Thickness bands rely on rotation for equalization; dispersing fixed defects by motion is a classic solution for blown film winding quality; after confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence

Extrusion & Post LDPE;blown film;thickness band;rotating die;winding

Q

LDPE Blown Film Die Buildup

A

Die lip buildup is a dual signal of temperature and die lip condition; copper sheet cleaning plus temperature management is the standard treatment; after confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence

Extrusion & Post LDPE;die buildup;die lip;carbonization;cleaning

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