LLDPE

LLDPE (Linear Low-Density Polyethylene)

LLDPE is produced via a lower-pressure process using catalysts, which creates short, uniform branches. While these branches prevent full crystallization, the linear backbone provides greater strength.

  • Characteristics: Outstanding toughness and resistance to puncture and tear (superior to LDPE), high tensile strength, and good down-gauging potential in film production.

  • Applications: Stretch films for pallet wrapping, tank liners, and heavy-duty refuse sacks.
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LLDPE film grade

GRADE MFI Density Application Datasheet
LL-235F6 0.6(190°C / 2.16Kg) 0.922 Agricultural Films and Tapes - Lamination - Shrink Film - Industrial Films - Frozen Food Packaging
LL-0209AA & KJ 0.9(190°C / 2.16kg) 0.92 food grade - heavy duty sacks - agricultural film - liners - Produce bags - stretch film
LL-22B01KJ 1(190°C / 2.16Kg) 0.922 High stiffness blown film - Blending - Lamination
LL-22B01 1 (190°C / 2.16Kg) 0.922 High Stiffness Blown Film - Blending - Lamination
LL-22B02 2 (190°C / 2.16Kg) 0.922 High Stiffness Blown and Cast Film - Blending - Lamination
LL-22B03 3 (190°C / 2.16Kg) 0.922 High Stiffness Blown and Cast Film - Blending - Lamination
LL-18B03 3(190°C / 2.16Kg) 0.918 General Purpose - Cast Stretch Films also W&C compounds

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Key
Materials and Applications in Film Casting

The
choice of polymer raw material is crucial for determining the
final film properties and is heavily influenced by the desired application:

1.
Polyethylene (PE) Grades

  • LLDPE (Linear
    Low-Density Polyethylene):     Widely used for high-clarity cast film
    applications due to its superior toughness and puncture resistance. It is
    the core material for high-performance stretch film.
  • LDPE (Low-Density
    Polyethylene):     Used for seal layers in laminates where easy heat-sealing and low
    cost are prioritized.
  • HDPE (High-Density
    Polyethylene):     Less common for thin films but used for stiffer, stronger cast
    sheets and liners requiring chemical resistance.

2.
Polypropylene (PP) and Other Polymers

  • Cast Polypropylene
    (CPP):     Highly popular
    for flexible food packaging, textiles, and medical packaging due to its
    high heat resistance and excellent barrier properties.
  • PET (Polyethylene
    Terephthalate):     Cast into high-strength, thin films for electrical insulation,
    optical displays, and specialty barrier layers.

Critical
Applications

The
high-quality output of the film casting process
supports demanding markets:

  • Flexible Packaging: Retort pouches, stand-up
    pouches, snack food bags (often as a substrate for printing or
    lamination).
  • Hygiene and Medical: Non-woven laminates, breathable
    barrier films for surgical drapes and wound care.
  • Technical Films: Release liners, protective films
    for electronic displays, and specialized barrier films for solar panels
    (photovoltaics).

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