Linear Low-Density Polyethylene (LLDPE)

Linear Low-Density Polyethylene (LLDPE) is a semi-transparent, flexible thermoplastic with a linear backbone and short, uniform branches. It appears as translucent or milky-white granules or films, is odorless, and feels waxy to the touch. LLDPE is insoluble in water and most polar solvents but can be dissolved in certain organic solvents at elevated temperatures. It is non-corrosive, non-alkaline, and exhibits outstanding resistance to acids, bases, alcohols, and many chemicals. Its molecular structure delivers a unique combination of flexibility, toughness, and puncture resistance, making it suitable for demanding film and packaging applications.

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Product Technical Information

  • Purity: ≥99%
  • Form: Granules, pellets, powder, films, sheets
  • CAS No.: 25213-02-9
  • Molecular Formula: (C2H4)n (commonly represented as C8H16 for a typical copolymer unit)
  • Molecular Weight: 112.21 g/mol (per copolymer unit; actual polymer is much larger)

Linear Low-Density Polyethylene  Specification Table

Property Value/Description
Density 0.915–0.940 g/cm³
Melting Point 120–130 °C
Tensile Strength at Break 20–30 MPa
Elongation at Break 400–800%
Flexural Modulus 150–300 MPa
Dart Impact Strength High (e.g., 135 g/mil for film grades)
Tear Strength 160–400 g/mil (film grades)
Water Absorption (24 hrs) <0.01%
Chemical Resistance Excellent (acids, bases, alcohols)
Appearance Translucent to milky-white, odorless
Environmental Stress Crack Resistance Good

Downloadable TDS:

A comprehensive Technical Data Sheet (TDS) is available for download, providing detailed physical, chemical, and processing parameters for LLDPE.

Application Sectors and Industries of Linear Low-Density Polyethylene

Packaging:
LLDPE is a premier choice for stretch films, shrink wraps, food packaging, and heavy-duty bags. Its high puncture and tear resistance, combined with flexibility, ensures product protection and durability during storage and transportation.

Agriculture:
Used in greenhouse films, silage wraps, irrigation pipes, and mulch films, LLDPE’s weatherability and UV resistance (with additives) help maximize crop yields and protect agricultural products in diverse climates.

Consumer Goods:
LLDPE is found in squeeze bottles, lids, housewares, and flexible containers, offering impact resistance and ease of processing for a wide range of everyday products.

Construction:
LLDPE is used for vapor barriers, geomembranes, protective sheeting, and cable jacketing. Its chemical resistance and flexibility make it ideal for safeguarding structures and infrastructure.

Medical and Healthcare:
LLDPE is utilized in medical packaging films, disposable gloves, tubing, and pharmaceutical containers. Its inertness and compliance with food and medical safety standards ensure suitability for sensitive applications.

Industrial Applications:
The polymer is used for liners, protective covers, and chemical-resistant films. Its toughness and resistance to corrosive substances support demanding industrial environments.

Electrical and Electronics:
LLDPE is employed as insulation for cables and wires, providing excellent dielectric properties and resistance to moisture and chemicals.

Retail and Shopping:
LLDPE is widely used in the production of shopping bags, carrier bags, and garment bags, offering superior strength and flexibility for high-volume retail use.

Automotive:
In the automotive sector, LLDPE is used for protective films, seat covers, and flexible trim parts. Its resilience and processability support both functional and aesthetic applications.

Alternative Energy:
LLDPE is increasingly used in solar panel encapsulation, cable insulation, and protective wraps for wind and solar installations, where weatherability and electrical insulation are critical.

Packaging Types

  • 25 kg Bags: Standard for granules and pellets, moisture-resistant and suitable for manual or automated handling.
  • Bulk Bags (FIBC): For industrial-scale applications, typically 500–1000 kg per bag, ideal for high-volume manufacturing.
  • Rolls and Sheets: Supplied as continuous films or cut sheets for direct use in packaging, construction, or agricultural applications.
  • Drums: Used for LLDPE powders and specialty grades, providing contamination and moisture protection.
  • Custom Packaging: Tailored formats such as pre-cut liners, molded parts, or specific dimensions to meet unique customer requirements.

Linear Low-Density Polyethylene (LLDPE) delivers a unique balance of flexibility, strength, and chemical resistance, making it a versatile and high-performance polymer for a wide range of industries. For in-depth technical data, safety information, and compliance certifications, please refer to the downloadable TD

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