PET Defect Library

15 reference articles covering preform, closure, and bottle defects. Filter, search, and act.

Preform

• PreformAcetaldehyde (AA) too high
• PreformPreform haze / cloudiness
• PreformShort shot (incomplete fill)
• PreformStringing / gate stringing
• PreformCrystallinity in neck/body (white spots)
• PreformBubbles / voids
• PreformIV (intrinsic viscosity) drop

Closure

• ClosureClosure leakage / poor seal
• ClosureCO2 loss (carbonation retention)
• ClosureStress cracking (ESC) in hot climates
• ClosureTamper-evident band breakage
• ClosureClosure ovality / out-of-round

Bottle

• BottleUneven wall thickness
• BottlePearlescence (stress whitening)
• BottleBase / petaloid deformation

Related guides

• Common PET preform defects — causes & prevention
• PET preform incoming inspection
• Stress whitening / pearlescence explained