Problem & Solution

Practical answers to common plastic material challenges

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Q

PET melt fracture

A

Melt fracture is the speed upper limit; optimize the flow channel before increasing speed; 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 ...

Extrusion & Post PETmelt fracturesharkskinshear

Q

PET sheet scratches

A

Scratch prevention of high-gloss sheet relies on roll surface and environmental hygiene; 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...

Extrusion & Post PETscratchroll surfacedust prevention

Q

PET sheet static electricity

A

Static control relies on ion neutralization plus humidity management; 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 PETstatic electricityionizing airhumidity

Q

PET uneven winding

A

Winding quality depends on thickness uniformity and tension control; 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 PETwindingtensioncorrection

Q

PET sheet warpage

A

Sheet warpage is a manifestation of uneven cooling on both sides; 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 PETsheetwarpagecooling

Q

PET drop breakage

A

Drop strength is guaranteed by orientation design and bottle bottom structure; 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 PETdropstretch ratiobottle bottom

Q

PET preform bottom crystallization

A

Preform bottom crystallization relies on temperature and cooling control; defective preforms must be rejected; 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 troubleshooti...

Extrusion & Post PETpreform bottomcrystallizationcooling

Q

PET production speed stability

A

PET extrusion fears fiddling; speed stability is a prerequisite for quality stability, and speed adjustment transition sections must be isolated and managed; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence

Extrusion & Post PET;production speed;residence time;transition section;stability

Q

PET melt filtration screen change

A

Pressure differential monitoring is the sentinel of the PET filtration system; dual-station screen change and rapid tracing keep screen breakage losses to a minimum; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence

Extrusion & Post PET;filtration;pressure differential;screen changer;gel particle

Q

PET die-to-roll distance 8cm

A

The 8cm roll distance is the geometric guarantee of PET sheet transparency; fast cooling through the crystallization zone plus roll temperature control, a two-pronged approach to keep transparency; after confirming effectiveness, fix the parameters and practices into the work instruction to preve...

Extrusion & Post PET;sheet;roll distance;8cm;crystallization whitening

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