Linear Low Density Polyethylene
LLDPE is a widely used polyethylene material known for its balance of flexibility, strength, and processing stability. Manufacturers choose LLDPE because it performs well under mechanical stress while remaining easy to process. As a result, it plays a key role in packaging, industrial production, and rotational molding applications.
Unlike conventional LDPE, LLDPE has a linear molecular structure with short-chain branching. Because of this structure, it provides higher tensile strength, better puncture resistance, and improved elongation. In addition, LLDPE offers good chemical resistance and low moisture absorption, which makes it suitable for demanding industrial environments.
Key Properties of LLDPE
LLDPE combines mechanical durability with reliable processing behavior. These properties allow manufacturers to maintain stable output quality during production.
Key characteristics include strong impact resistance, high tear strength, and good flexibility. Moreover, LLDPE shows stable melt flow behavior, which helps improve extrusion and molding efficiency. It also resists many chemicals and maintains performance across a wide temperature range. For this reason, LLDPE is widely selected for long-term industrial use.
Common Applications of LLDPE
LLDPE supports a wide range of applications across multiple industries. Its adaptability allows producers to tailor performance depending on processing method and final product requirements.
Common applications include flexible packaging films, stretch and shrink films, agricultural films, industrial liners, containers, water tanks, and molded household items. In addition, LLDPE is used in extrusion coating, sheet production, and laminated structures where strength and consistency are required.
LLDPE Film Grades
Film grades are designed for applications that require flexibility, durability, and controlled stretch performance. These grades work well in both mono-layer and multi layer film systems. Therefore, they are commonly used in packaging and agricultural films.
Typical uses include stretch film, packaging film, shopping bags, lamination film, and heavy-duty industrial films. Moreover, film grades provide balanced optical clarity, good puncture resistance, and reliable elongation.
Technical Range – Film Grades
| Application Type | MFI (190°C / 5 kg) | Density (g/cm³) |
|---|---|---|
| General purpose film | 0.5 – 1.0 | 0.918 – 0.923 |
| High-strength / stretch film | 0.6 – 1.2 | 0.920 – 0.923 |
| Cast film | 2.0 – 3.0 | 0.918 – 0.920 |
| Shrink film | 0.3 – 0.6 | 0.918 – 0.921 |
| High-clarity film | 0.6 – 1.0 | 0.912 – 0.918 |
LLDPE Injection Molding Grades
Injection molding grades are formulated to provide smooth flow and stable processing. These grades help manufacturers produce parts with consistent dimensions and good surface quality.
Typical products include caps, closures, household containers, thin-wall items, and general plastic components. In addition, injection grades support higher flow rates while maintaining mechanical strength.
Technical Range – Injection Grades
| Application Type | MFI (190°C / 5 kg) | Density (g/cm³) |
|---|---|---|
| General injection molding | 5 – 20 | 0.920 – 0.926 |
| High-flow injection | 20 – 60 | 0.922 – 0.928 |
| Fast-cycle molding | 10 – 35 | 0.922 – 0.928 |
LLDPE Rotomolding Grades
Rotomolding grades are designed for hollow products that require uniform wall thickness and strong impact resistance. These grades perform well under outdoor conditions and mechanical stress.
Common applications include water tanks, chemical storage tanks, agricultural containers, and industrial bins. In addition, roto molding grades offer excellent resistance to environmental stress cracking, which helps extend product life.
Technical Range – Rotomolding Grades
| Application Type | MFI (190°C / 5 kg) | Density (g/cm³) |
|---|---|---|
| Standard rotomolding | 3 – 5 | 0.930 – 0.938 |
| High ESCR rotomolding | 4 – 5 | 0.930 – 0.940 |
LLDPE Extrusion Grades
Extrusion grades support smooth melt flow and consistent thickness control. These grades are suitable for coating, sheet extrusion, and laminated structures used in packaging and industrial applications.
Typical uses include extrusion coating, industrial sheets, and flexible laminated products. Furthermore, extrusion grades help maintain stable processing conditions and uniform product quality.
Technical Range – Extrusion Grades
| Application Type | MFI (190°C / 5 kg) | Density (g/cm³) |
|---|---|---|
| Extrusion coating | 5 – 8 | 0.920 – 0.925 |
| Sheet extrusion | 1 – 3 | 0.920 – 0.930 |
Supply and Technical Support
Basekim supplies LLDPE for industrial and commercial applications with consistent quality and controlled specifications. We support customers by helping them select suitable grades based on processing needs and performance targets.
In addition, we provide technical documentation and export-ready packaging for international shipments. Our supply model supports long-term cooperation with manufacturers, distributors, and industrial buyers worldwide.
WIKI
Q1:What is LLDPE and how is it different from LDPE?
LLDPE (Linear Low Density Polyethylene) is a polyethylene resin with a linear molecular structure and short chain branching. Compared to LDPE, it offers higher tensile strength, better puncture resistance, and improved elongation while maintaining flexibility. These characteristics make LLDPE more suitable for demanding industrial and packaging applications.
Q2:What are the main applications of LLDPE?
LLDPE is widely used in flexible packaging, industrial films, agricultural films, injection-molded products, extrusion coatings, and rotomolded items. Common end products include stretch film, shopping bags, containers, water tanks, industrial sheets, and laminated packaging materials.
Q3:What melt flow index (MFI) ranges are available for LLDPE?
LLDPE is available in a wide range of melt flow indices depending on the processing method. Film grades usually range from 0.3 to 3 g/10 min, injection grades from 5 to 60 g/10 min, extrusion grades from 1 to 8 g/10 min, and rotomolding grades typically fall between 3 and 5 g/10 min.
Q4:What density range does LLDPE typically have?
LLDPE generally has a density range between 0.912 and 0.940 g/cm³, depending on grade and application. Lower densities are commonly used for flexible films, while higher densities are selected for rotomolding and structural applications.
Q5:Is LLDPE suitable for outdoor and long-term use?
Yes. Certain LLDPE grades are formulated to provide good resistance to environmental stress cracking and mechanical fatigue. When combined with appropriate stabilizers, LLDPE performs well in outdoor applications such as water tanks, agricultural containers, and industrial storage products.