Problem & Solution

Practical answers to common plastic material challenges

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Q

PBT Hydrolysis Resistance Shortcoming

A

PBT's poor hydrolysis resistance stems from ester bonds and terminal carboxyl groups; carbodiimide and end-capping technology are the two major modification routes; after confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence

Material Drying PBT; hydrolysis resistance; terminal carboxyl; carbodiimide; end-capping

Q

PBT Low-Warpage Grade

A

Low-warpage grades are the mature answer for large-size glass fiber PBT parts; material selection is more effective than process compensation; after confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence

Material Drying PBT; low warpage; 733LD; PBT/SAN; grade

Q

PBT insufficient drying hidden degradation

A

PBT's low water absorption is a trap rather than an exemption; high-temperature water sensitivity determines that drying must be quantitatively verified; after confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence

Material Drying PBT; hidden hydrolysis; low water absorption; electrical performance; sampling inspection

Q

PBT drying 110-120℃×3h

A

PBT drying is the precondition for its high-temperature processing; 110-120℃×3h is the standard specification of manufacturers such as Polyplastics, and hydrolysis damage is irreversible; after confirming effectiveness, solidify the parameters and practices into the work instruction to prevent re...

Material Drying PBT; drying; 110-120℃; 3 hours; hydrolysis

Q

PBT product bubbles (degradation)

A

Distinguish moisture and degradation for bubbles; if drying is ineffective, check the temperature history.; 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...

Material Drying PBT; bubble; degradation; temperature; residence time; shear

Q

PBT insufficient drying silver streaks and bubbles

A

PBT drying standards are as strict as PET; moisture both produces apparent defects and causes hydrolysis damage, and the dual harm must be strictly controlled.; after confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence

Material Drying PBT; drying; silver streak; bubble; hydrolysis; moisture content

Q

PBT poor hydrolysis resistance and performance deterioration

A

The PBT hydrolysis problem must be solved at the material level; anti-hydrolysis agents and hydrolysis-resistant grades are the standard solution, and the process can only slow it down but not cure it.; after confirming effectiveness, solidify the parameters and practices into the work instructio...

Material Drying PBT; hydrolysis; hot and humid; anti-hydrolysis agent; carbodiimide; aging

Q

PBAT coating application

A

PBAT coating is a composite application; adhesion and uniformity are quality; process matching ensures effect.; after confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence

Material Drying PBAT; coating; adhesion; uniformity; coating application; substrate

Q

PBAT recycling utilization

A

Molecular weight management is the core of PBAT recycling; control of times and proportion; verification ensures quality.; after confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence

Material Drying PBAT; recycling; heat history; molecular weight; times; proportion

Q

PBAT '2079851475616104452 silver streaks and bubbles

A

Drying and temperature are the main causes of gas defects in PBAT '2079851475616104452; segmented injection is the standard anti-air-trap technology; venting design cannot be omitted.; after confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recur...

Material Drying PBAT; '2079851475616104452; silver streak; bubble; drying; temperature

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