Problem & Solution

Practical answers to common plastic material challenges

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Q

PP Extrusion Melt Fracture

A

Exit roughness: raise temperature, reduce speed, apply PPA.

Extrusion & Post PP;extrusion;melt fracture;sharkskin;PPA

Q

POM Printing Ink Loss

A

POM printing requires surface activation plus special ink; 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 subsequent similar problems

Extrusion & Post POMprintingcoronaink

Q

POM Coating Adhesion

A

POM coating is inherently difficult—choose carefully for important appearance parts; 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 subsequent similar...

Extrusion & Post POMcoatingadhesionsurface energy

Q

POM Shrinkage Out of Tolerance

A

POM dimensional management is based on measured shrinkage; 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 subsequent similar problems

Extrusion & Post POMshrinkage ratedimensionSPC

Q

POM Printing and Bonding Difficulty

A

The timeliness of POM surface treatment is key; process immediately after treatment, and only with special consumables can adhesion be durable; after confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence

Extrusion & Post POM;printing;bonding;corona;surface energy

Q

POM Delamination and Peeling

A

Contamination is the number one suspect in POM delamination; gate and cold slug well are the second check, and cleaning verification closes the loop; after confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence

Extrusion & Post POM;delamination;contamination;gate;cold slug well

Q

POM Annealing Post-treatment

A

Annealing is the standard post-treatment for precision POM parts; temperature-time combinations graded by thickness lock dimensions in a stable state; after confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence

Extrusion & Post POM;annealing;post-shrinkage;100℃;120-130℃

Q

POM Machined Parts

A

Machined parts require dense rod stock plus aging; 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 subsequent similar problems

Extrusion & Post POMmachiningdrillingaging

Q

POM annealing temperature

A

Annealing temperature and time are executed according to the specification, and re-measurement is mandatory after annealing; 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...

Extrusion & Post POMannealingrecrystallizationre-measurement

Q

POM internal stress cracking and embrittlement

A

Internal stress cracking has a lag and is difficult to detect at the factory; a mild process with low pressure and high mold temperature is the prevention principle, and critical parts should undergo stress verification.; after confirming effectiveness, fix the parameters and practices into the w...

Extrusion & Post POM；internal stress；cracking；embrittlement；annealing；mold temperature

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