Problem & Solution

Practical answers to common plastic material challenges

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PET Bottle Insufficient Top Load Strength

Lightweighting forces top load management.

Extrusion & Post PET; bottle blowing; top load strength; wall thickness distribution; lightweighting

rPET Bottle Slight Haze

rPET haze = the sequelae of heat history; standards should be set in advance.

Production & Quality PET; rPET; haze; thermal cycle; transparency

rPET Bottle Black Speck Impurities

Material Analysis PET; rPET; black speck; impurity; filtration

PET Preform Aging (Long Inventory)

Old preforms = hardened preforms; temperature compensation must keep up.

Extrusion & Post PET; preform; aging; IV; oven temperature

PET Preform IV Drop (Intrinsic Viscosity Decrease)

IV is the general ledger of PET processing quality.

Material Drying PET; IV drop; intrinsic viscosity; hydrolysis; thermal degradation

PET Preform Acetaldehyde (AA) Odor

Odor = degradation products; dual control of temperature and water.

Material Drying PET; acetaldehyde; odor; thermal degradation; hydrolysis

PET Injection Preform Gate Crystallization (Whitening)

Gate whitening = local crystallization, a hidden danger at the bottom.

Injection Molding PET; preform; gate crystallization; shear heat; cooling

PET Injection Preform Black Specks

Preform black specks = dead-corner carbonization.

Injection Molding PET; preform; black speck; carbonization; hot runner

PET Bottle Insufficient High-Pressure Air

High-pressure air is the guarantee of the last millimeter of stretching.

Extrusion & Post PET; bottle blowing; high-pressure air; pressure curve; air storage tank

PET Bottle Single Cavity Abnormality

Molds & Tooling PET; bottle blowing; mold cavity; cooling water channel; mold temperature

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