Marlex D139 polyethylene is a metallocene-catalyzed linear low-density polyethylene (mLLDPE) material produced by Chevron Phillips Chemical. It is an ethylene-hexene copolymer designed specifically for high-performance blown film applications requiring an excellent balance of mechanical strength, optical clarity, and processing stability. Compared with conventional LLDPE grades, this resin delivers more consistent performance, enhanced film properties, and improved processing control.

Property

Typical Value

Test Method

Melt Index (MFI)

1.0 g/10 min

ASTM D1238

Density

0.918 g/cm³

ASTM D1505

Haze

4%

ASTM D1003

Gloss (60°)

130

ASTM D2457

Tear Strength (MD/TD)

220/430g/mil

ASTM D1922

Dart Impact

600–700g/mil

ASTM D1709

Tensile Strength (Yield, MD/TD)

13/10MPa

ASTM D882

Elongation at Break (MD/TD)

500–600%

ASTM D882

Heat-Seal Initiation Temperature

102°C

ASTM F88

Main Applications of mLLDPE Marlex D139

mLLDPE Marlex D139 is widely used for producing high-performance films and packaging materials, including blown films, coextruded multi-layer heat-seal layers,heavy-duty packaging films,high-clarity packaging films, agricultural films and protective covers.

Performance Advantages

  • Excellent Mechanical Strength. mLLDPE Marlex D139 provides outstanding toughness, impact resistance, and tear strength in both machine and transverse directions. Films produced from this resin maintain high durability even at reduced thickness, making it ideal for demanding packaging applications.
  • Superior Optical Properties. The resin offers low haze and high gloss, resulting in films with excellent transparency and visual appeal. These characteristics make Marlex D139 particularly suitable for packaging where product visibility is critical.
  • Reliable Heat-Sealing Performance. With a well-balanced seal initiation temperature, Marlex D139 delivers consistent and strong heat seals. It is commonly used as a seal layer in co-extruded film structures, improving package integrity and sealing efficiency.
  • Stable and Efficient Processing. Thanks to its uniform molecular structure, this material ensures smooth melt flow, wide processing windows, and stable bubble formation during blown film extrusion. This contributes to improved productivity and consistent film quality.

Storage & Handling

The material should be stored in a dry, well-ventilated area, away from direct sunlight and excessive heat. Under normal storage and processing conditions, the material is stable and easy to handle. Avoid contact with strong oxidizing agents.

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