Problem & Solution

Practical answers to common plastic material challenges

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Q

PVDF Product Flash

A

For flash, distinguish between clamping and wear causes.; 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

Molds & Tooling PVDF;flash;clamping force;parting line;wear;pressure

Q

PVDF Product Short Shot

A

Troubleshoot short shot from temperature, pressure, and runner.; 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

Processing Machinery PVDF;short shot;temperature;pressure;runner;venting

Q

PVDF Product Warpage

A

PVDF warpage is managed by cooling uniformity; a common problem of highly crystalline materials.; 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 pr...

Molds & Tooling PVDF;warpage;cooling;crystallization;mold temperature;holding pressure

Q

PVDF Product Sink Marks

A

PVDF's high shrinkage makes sink mark management important; holding pressure and structural design are equally emphasized.; After confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence

Processing Machinery PVDF;sink marks;shrinkage;holding pressure;wall thickness;coring out

Q

PVDF Melt Temperature Degradation

A

PVDF thermal decomposition releasing HF poses both quality and safety risks; 300℃ is an insurmountable red line.; After confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence

Processing Machinery PVDF;degradation;discoloration;hydrofluoric acid;temperature;decomposition

Q

PVDF Insufficient Drying Bubbles

A

PVDF drying requirements are relatively mild but cannot be omitted; high-temperature processing keeps moisture management important.; After confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence

Material Drying PVDF;drying;bubbles;silver streaks;moisture;moisture absorption

Q

PVDF Processing Corrodes Equipment

A

PVDF corrosion is determined by its fluorine-containing nature; corrosion-resistant equipment configuration is an entry condition for processing PVDF, and ordinary mold steel cannot be used directly.; After confirming effectiveness, fix the parameters and practices into the work instruction to pr...

Processing Machinery PVDF;corrosion;hydrofluoric acid;equipment;corrosion-resistant steel;coating

Q

PVC Stabilizer Failure

A

Changing the stabilizer requires re-verification of the processing window; 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

Processing Machinery PVCstabilizerverificationwindow

Q

PVC Impact Modification Failure

A

Impact modification requires dual assurance of dispersion and temperature; 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

Processing Machinery PVCimpact resistancedispersionlow temperature

Q

PVC Filler Agglomeration

A

High filling relies on dispersion and interface treatment; 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

Processing Machinery PVCfillingagglomerationcoupling agent

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