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Praktische Antworten auf häufige Herausforderungen mit Kunststoffmaterialien

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Q

PBT low weld line strength

A

PBT weld line management is the same as for other crystalline materials; design to avoid stressed areas takes priority.; after confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence

Processing Machinery PBT; weld line; strength; front temperature; gate; overflow well

Q

PBT surface floating fibers

A

Floating fibers affect appearance and coating; increasing temperature and speed to improve coating ability is the universal countermeasure.; after confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence

Injection Molding PBT; floating fiber; surface; glass fiber; coating; temperature

Q

PBT large shrinkage and dimensional deviation

A

PBT shrinkage management relies on measured data and process stability; dimensional judgment of crystalline materials must allow sufficient aging time.; after confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence

Molds & Tooling PBT; shrinkage; dimension; mold temperature; holding pressure; aging

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 glass fiber reinforced warpage

A

PBT reinforced warpage is a typical manifestation of shrinkage anisotropy; gate design and filler form (fiber changed to beads) are the main countermeasures.; after confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence

Molding Process PBT; glass fiber reinforcement; warpage; orientation; shrinkage; gate

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

PBT thin-wall product insufficient flowability

A

Thin-wall PBT filling relies on the coordination of temperature, grade and runner; high-flow grades are the structural solution.; after confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence

Injection Molding PBT; thin wall; flowability; short shot; temperature; grade

Q

PBT notch-sensitive brittle cracking

A

Notch sensitivity is an inherent weakness determined by PBT's molecular structure; modification and structural design are the two major solution paths, and toughened grades should take priority over process adjustment.; after confirming effectiveness, solidify the parameters and practices into th...

Molds & Tooling PBT; notch sensitivity; brittle cracking; toughening; blending modification; molecular structure

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 foamed material

A

PBAT foaming is a functionalization direction; cell structure determines performance; testing ensures application.; after confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence

Processing Machinery PBAT; foaming; cell; density; foaming agent; performance

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