Problem & Solution

Practical answers to common plastic material challenges

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Q

PLA insufficient heat resistance and deformation

A

PLA heat resistance relies on increasing crystallinity; heat-set crystallization (CPLA) can significantly increase the heat resistance temperature.; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence

Processing Machinery PLA;heat resistance;deformation;glass transition temperature;crystallization;heat setting

Q

PLA products are very brittle and easy to break

A

Brittleness is PLA's most prominent performance shortcoming; blending and toughening is the mainstream solution, and compatibilizers can significantly increase elongation at break.; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence

Processing Machinery PLA;brittleness;fracture;toughening;blending;compatibilizer

Q

PLA thermal degradation yellowing

A

PLA's thermal degradation threshold is lower than conventional plastics; low temperature and short time are the basic principles of its processing.; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence

Processing Machinery PLA;thermal degradation;yellowing;temperature;residence time;shear

Q

PET acetaldehyde exceeding standard

A

Acetaldehyde is a hygiene indicator for water bottles; temperature control is fundamental; 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 ...

Processing Machinery PETacetaldehydeodorwater bottle

Q

PET screen change fluctuation

A

Screen change fluctuations are controlled with a continuous screen changer plus isolation and cutting; 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 simil...

Processing Machinery PETscreen changepressure fluctuationisolation

Q

PET die opening buildup

A

Die opening buildup is the accumulation of precipitates; cleaning plus temperature 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 probl...

Processing Machinery PETdie opening buildupprecipitationstreaks

Q

PET thickness fluctuation

A

Longitudinal thickness relies on metering stability and online closed loop; 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 PETthicknessmetering pumpclosed loop

Q

PET hot filling deformation

A

Hot filling and normal-temperature bottle types cannot be mixed; 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 PEThot fillingheat settingcollapse

Q

PET insufficient pressure resistance

A

Carbonated bottles are designed for wall thickness and orientation according to internal pressure creep; 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 sim...

Processing Machinery PETcarbonated bottlepressure resistancecreep

Q

PET bottle body stress cracking

A

Stress cracking requires three-party verification of structural design, process, and contents; 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 probl...

Processing Machinery PETstress crackingbottle bottomcompatibility

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