Problem & Solution

Practical answers to common plastic material challenges

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Q

TPU silver streaks

A

TPU silver streaks have the same source as bubbles but to a lesser degree; troubleshoot the three aspects of drying, mixing, and cold material; cold slug wells are a simple and effective measure to intercept cold material; after confirming effectiveness, fix the parameters and practices into the ...

Material Drying TPU；silver streak；moisture；mixing；cold material；cold slug well

Q

TPU bubbles (air trap and degradation type)

A

Bubble identification must be divided into four categories: moisture, air trap, degradation, and vacuum bubbles; after drying is ineffective, troubleshoot the remaining sources one by one according to position characteristics; after confirming effectiveness, fix the parameters and practices into ...

Material Drying TPU；bubble；air trap；degradation；vacuum bubble；venting

Q

TPU bubbles (moisture type)

A

Eighty percent of TPU bubbles originate from moisture management; meeting the drying standard is only the first step, and controlling the exposure time after drying is equally critical; repeated heating cannot replace drying.

Material Drying TPU；bubble；moisture；drying；moisture content；moisture absorption

Q

TPE poor welding

A

Heat sealing relies on parameter calibration; 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 later

Processing Machinery TPEheat sealingstrengthparameters

Q

TPE stress cracking

A

Verify compatibility first before chemical contact; 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 later

Processing Machinery TPEstress crackingchemicalscompatibility

Q

TPE black specks

A

Black specks rely on disassembly cleaning and monitoring; 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 later

Processing Machinery TPEblack speckdead spotdisassembly cleaning

Q

TPE yellowing

A

For yellowing check temperature and light; 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 later

Processing Machinery TPEyellowingdegradationlight

Q

TPE ejection whitening

A

Ejection whitening relies on balanced ejection; 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 later

Molds & Tooling TPEejection whiteningejector pincooling

Q

TPE short shot

A

Short shot relies on temperature, speed, and gate; 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 later

Processing Machinery TPEshort shotthin wallgate

Q

TPE weld line

A

Weld lines rely on temperature and position; 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 later

Processing Machinery TPEweld lineoverflow wellgate

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