Problem & Solution

Practical answers to common plastic material challenges

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LDPE Film Wrinkles

Extrusion & Post LDPE; film; wrinkle; alignment; collapsing frame; tension

LDPE Film Die Lines

Longitudinal die lines = die lip condition problem.

Molding Process LDPE; film; die line; die lip; buildup

LDPE Film Surface Orange Peel/Melt Fracture

Film surface orange peel = exit shear exceeding the limit.

Molding Process LDPE; film; melt fracture; orange peel; PPA

LDPE Film Longitudinal Splitting (Splitty)

Longitudinal splitting = orientation imbalance; adjust the blow-up ratio.

Molding Process LDPE; film; longitudinal splitting; orientation; blow-up ratio

LDPE Film Weak Edge (Slitting Edge Burst)

Edge burst = cutter + tension + orientation balance.

Molding Process LDPE; film; slitting; edge burst; blow-up ratio

Insufficient Heat Seal Strength of LDPE Film

Processing Machinery LDPE; film; heat seal; strength; parameter; window

High Haze of LDPE Film

Molding Process LDPE; film; haze; crystallization; air ring

Abnormal Coefficient of Friction of LDPE Film

COF relies on refined management of slip agent.

Extrusion & Post LDPE; film; coefficient of friction; slip agent; blooming

LDPE Film Blocking

Blocking = joint treatment of additive + tension + temperature.

Extrusion & Post LDPE; film; blocking; antiblock agent; winding tension

LDPE Film Thickness Deviation (TD)

For TD deviation, check die lip and air ring symmetry.

Extrusion & Post LDPE; film; thickness deviation; TD; air ring

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