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Practical answers to common plastic material challenges

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Q

PBAT hydrolysis and short shelf life

A

PBAT hydrolysis is an inherent weakness of ester-based materials; terminal carboxyl content is a core quality indicator; moisture-proof management runs through storage and use.; after confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence

Material Drying PBAT; hydrolysis; terminal carboxyl; shelf life; ester group; moisture protection

Q

PARA Moisture Absorption Management

A

PARA moisture absorption management is directly related to crystallinity; high mold temperature is prevention; environmental control is auxiliary.; after confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence

Material Drying PARA; moisture absorption; crystallinity; mold temperature; humidity; performance

Q

PARA Shrinkage Depression

A

The 7~10mm wall thickness upper limit for PARA shrinkage depression is a design red line; drying and density management are given equal weight; lowering temperature reduces thermal shrinkage.; after confirming effectiveness, solidify the parameters and practices into the work instruction to preve...

Material Drying PARA; shrinkage; depression; wall thickness; density; drying

Q

PARA Burnt Trapped Air

A

PARA burnt troubleshooting must cover the five factors of temperature, speed, pressure, moisture and venting; the venting design of high-speed processes must be strengthened; systematic troubleshooting is superior to single-point adjustment.

Material Drying PARA; burnt; venting; injection speed; moisture; trapped air

Q

PARA Insufficient Drying Defects

A

PARA's 24-hour opening rule is an explicit supplier specification; multi-temperature drying options provide flexibility; dew point verification is the drying quality assurance.; after confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence

Material Drying PARA; drying; 24 hours; desiccant; dew point; silver streak

Q

PARA Mold Temperature Too Low, Insufficient Crystallization

A

PARA's 120°C mold temperature red line is determined by the 85°C Tg; the DSC post-crystallization peak is direct evidence of insufficient crystallization; mold temperature verification must be measured rather than the displayed value.

Material Drying PARA; mold temperature; crystallinity; 120°C; DSC; post-crystallization

Q

PA6 Batch Color Difference

A

Batch color difference requires systematic control of the three links of raw material, temperature and metering; 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 refe...

Material Drying PA6 color difference color masterbatch metering

Q

PA6 Density Porosity Troubleshooting

A

Underweight density indicates internal pores, troubleshoot along the two lines of water vapor and shrinkage cavities; 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...

Material Drying PA6 pore density holding pressure

Q

PA6 Stress Whitening

A

Stress whitening is a signal of insufficient toughness, and conditioning plus toughening are the main countermeasures; after confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence; include this case in the defect archive as a troubleshootin...

Material Drying PA6 stress whitening toughness toughening

Q

PA6 Poor Coating Adhesion

A

Spray coating adhesion is guaranteed by pretreatment, and degreasing, dehumidifying plus surface activation are all indispensable; after confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence

Material Drying PA6 spray coating adhesion pretreatment

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