Problema e solução

Respostas práticas para os desafios comuns dos materiais plásticos

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Q

POM moisture content control

A

Control POM moisture content at 0.1%, and start the machine only after sample confirmation; 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...

Material Drying POMmoisture content0.1%bubble

Q

POM drying temperature and time

A

POM drying is a gentle process, and over-temperature drying equals pre-degradation; 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 ...

Material Drying POMdrying temperaturethermal degradationformaldehyde

Q

Necessity of POM drying

A

Low water absorption does not mean drying-free; opened and exposed material must be baked dry; 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...

Material Drying POMdryingwater absorption ratesilver streak

Q

POM low water absorption drying specification

A

POM drying is icing on the cake rather than a lifeline; routine 80°C×2-4h, moisture-affected material must be baked, appearance parts have a fixed drying process; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence

Material Drying POM；drying；low water absorption；80°C；surface gloss

Q

Bubbles and silver streaks caused by improper POM drying

A

Although POM's drying requirements are lower than those of PA and PET, standardized drying is still required in humid environments; seasonal defect outbreaks often correspond to humidity changes.；After confirming effectiveness, fix the parameters and practices into the work instruction to prevent...

Material Drying POM；drying；moisture content；bubble；silver streak；humidity

Q

POM surface streaks and silver threads

A

Streaks and silver threads mostly originate from degradation or trace moisture; troubleshoot from the three aspects of temperature, residence time, and drying, starting with the easiest adjustment, cooling.; after confirming effectiveness, fix the parameters and practices into the work instructio...

Material Drying POM；streaks；silver threads；degradation；residence time；drying

Q

POM product silver streaks

A

POM silver streaks need to be distinguished between two sources: moisture and decomposition; verify by drying first and then troubleshoot temperature, and item-by-item confirmation according to the mechanism can avoid blind machine adjustment.; after confirming effectiveness, fix the parameters a...

Material Drying POM；silver streaks；drying；moisture；decomposition；back pressure

Q

POM product bubbles

A

POM bubbles must be distinguished among three sources: water vapor, decomposition gas, and vacuum voids; drying and temperature control come first, feeding and venting follow, verify item by item to locate.; after confirming effectiveness, fix the parameters and practices into the work instructio...

Material Drying POM；bubbles；moisture；decomposition gas；vacuum voids；venting

Q

POM surface streaks/silver streaks

A

For POM silver streaks, check degradation first, then moisture.

Material Drying POM；silver streaks；streaks；degradation；drying

Q

PMMA dimensional deviation

A

PMMA precision parts must have tolerances designed according to the environmental range; after confirming effectiveness, fix 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...

Material Drying PMMAdimensionthermal expansiontolerance

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