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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 overmolding bubbles

A

For overmolding bubbles check moisture and venting; 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

Material Drying TPEovermoldingbubbleventing

Q

TPE silver streak moisture

A

For silver streaks check moisture first; 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

Material Drying TPEsilver streakmoistureshear

Q

TPE bubble causes

A

Bubbles are identified and handled by three routes; 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

Material Drying TPEbubblethree routesidentification

Q

TPE first article verification

A

TPE first article verification must include material state and bonding; qualified appearance does not mean qualified function; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence

Material Drying TPE；first article verification；moisture content；bonding；material change

Q

TPE uneven color

A

TPE color matching relies on carrier compatibility and back pressure dispersion; coupling agents are a chemical means to improve bonding; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence

Material Drying TPE；uneven color；color masterbatch；back pressure；coupling agent

Q

TPE silver streaks dominated by moisture

A

For TPE silver streaks, suspect drying first; the 0.1% red line plus an insulated hopper can eliminate 95% of silver streaks; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence

Material Drying TPE；silver streak；moisture；0.1%；drying

Q

TPE bubble cause differentiation

A

TPE bubble troubleshooting must consider both soft and hard plastics; dual-'2079851475616104451 is a special requirement for overmolded parts; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence

Material Drying TPE；bubble；moisture；air entrainment；overmolding

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