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Practical answers to common plastic material challenges

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Q

LLDPE film tensile strength advantage realization

A

LLDPE's strength advantage must be activated by the process; orientation management is the key to realizing performance.; After confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence.

Extrusion & Post LLDPE; film; tensile strength; orientation; blow-up ratio; die exit

Q

LLDPE film uneven thickness

A

LLDPE requires higher thickness control precision; automatic thickness measurement adjustment can compensate for material sensitivity.; After confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence.

Extrusion & Post LLDPE; film; uneven thickness; die exit; air ring; thickness measurement

Q

LLDPE blown film bubble breakage

A

Bubble breakage is the main constraint on increasing the LLDPE proportion; blending modification balances performance and stability better than reducing output.; After confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence.

Extrusion & Post LLDPE; blown film; bubble breakage; melt strength; LDPE; blow-up ratio

Q

LLDPE blown film high extrusion pressure

A

LLDPE processing pressure management relates to energy consumption and equipment life; PPA can reduce consumption by 30~60% while improving surface quality.; After confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence.

Extrusion & Post LLDPE; blown film; extrusion pressure; torque; PPA; energy consumption

Q

LLDPE blown film die lip buildup

A

Die lip buildup is a persistent problem in LLDPE production; PPA lubricating layer technology can significantly extend the die cleaning cycle.; After confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence.

Extrusion & Post LLDPE; blown film; die lip buildup; PPA; lubrication; die cleaning

Q

LLDPE blown film gel particles

A

LLDPE has higher requirements on screw plasticization capability than LDPE; equipment upgrading and enhanced filtration are the core of gel particle control.; After confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence.

Extrusion & Post LLDPE; blown film; gel particles; gel; screw; screen

Q

LLDPE blown film sharkskin melt fracture

A

LLDPE is a high-incidence material for sharkskin; PPA aid can quickly eliminate it without modifying equipment, and works better with a wide die gap.; After confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence.

Extrusion & Post LLDPE; blown film; sharkskin; melt fracture; PPA; die exit

Q

LLDPE blown film bubble instability

A

LLDPE bubble stability is inherently weaker than LDPE; blending LDPE is the most common improvement method, and combining with cooling and bubble stabilizing devices gives better results.; After confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurr...

Extrusion & Post LLDPE; blown film; bubble instability; melt strength; LDPE blending; bubble stabilizer

Q

LLDPE film frost line abnormality

A

Frost line = process barometer.

Extrusion & Post LLDPE; blown film; frost line; air ring; extrusion

Q

LLDPE blown film output limitation

A

Output bottleneck = exit shear; crack it systematically.

Extrusion & Post LLDPE; blown film; output; sharkskin; PPA

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