LyondellBasell Lupolen 4261 A
High-Performance High-Density Polyethylene Family
Exceptional balance of processability, mechanical strength, and chemical resistance for demanding applications
Technical Overview
Lupolen 4261 A is a family of high-density polyethylene (HDPE) resins from LyondellBasell, renowned for its exceptional balance of processability, mechanical strength, and chemical resistance. This family provides a detailed overview of the key characteristics, applications, and processing guidelines for demanding applications in packaging and industrial components.
This family of materials is characterized by a high molecular weight, which contributes to its outstanding environmental stress cracking resistance (ESCR) and impact strength, making it a preferred choice for demanding applications. The various grades are tailored for specific conversion processes, primarily blow molding and injection molding, and may include additives to enhance performance in certain environments.
Key Features and Benefits
Exceptional ESCR
Critical feature for containers holding aggressive substances, providing long-term durability and safety.
High Impact Strength
Excellent resistance to impact, even at low temperatures, ensuring product integrity during transport and use.
Chemical Resistance
Resistant to acids, bases, and organic solvents, suitable for packaging diverse and hazardous materials.
Excellent Processability
Designed for stable and efficient processing on standard blow molding and injection molding equipment.
Good Rigidity
High density imparts good stiffness, essential for maintaining shape and structural integrity.
Prominent Grades and Applications
Lupolen 4261 AG
Key grade for blow molding applications, widely used in production of large-volume containers.
- Drums and jerry cans
- Intermediate Bulk Containers (IBCs)
- Dangerous goods packaging
Lupolen 4261 A IM
Optimized for injection molding, used for technical parts demanding high ESCR and impact strength.
- Automotive fuel system components
- Industrial fittings
- Technical parts
Lupolen 4261 A UV
Contains UV stabilizers to protect against sunlight degradation for outdoor applications.
- Outdoor applications
- Extended service life
- UV protection
Lupolen 4261 A (General)
Base resin for extrusion and blow molding applications, versatile for various containers.
- Extrusion applications
- Blow molding
- Wide array of containers
Technical Data Sheet
Material Properties Comparison
| Property | Test Method | Units | Lupolen 4261 AG | Lupolen 4261 A IM |
|---|---|---|---|---|
| Physical Properties | ||||
| Melt Flow Rate (190°C/5.0 kg) | ISO 1133 | g/10 min | ~0.3 - 0.4 | - |
| Melt Flow Rate (190°C/21.6 kg) | ISO 1133 | g/10 min | ~7.0 - 9.0 | ~12 - 15 |
| Density | ISO 1183 | g/cm³ | 0.944 - 0.946 | 0.940 - 0.942 |
| Mechanical Properties | ||||
| Tensile Modulus | ISO 527-2 | MPa | ~850 - 950 | ~800 - 900 |
| Tensile Stress at Yield | ISO 527-2 | MPa | ~23 - 25 | ~21 - 23 |
| Tensile Strain at Yield | ISO 527-2 | % | ~9 - 10 | ~9 - 10 |
| Charpy Notched Impact Strength | ISO 179/1eA | kJ/m² | ~15 - 20 | ~12 - 18 |
| ESCR (F50, Condition B) | ASTM D1693 | hours | >1000 | High |
| Thermal Properties | ||||
| Vicat Softening Temperature (A50) | ISO 306 | °C | ~125 | ~124 |
| Heat Deflection Temperature (0.45 MPa) | ISO 75-2 | °C | ~70 - 75 | ~68 - 72 |
Note: Values are typical and should not be considered as specifications. Consult official product data sheets for specific grades.
Processing Recommendations
Blow Molding
Optimal temperature depends on machine, mold design, and part size. Use chilled mold for rapid cooling and dimensional stability.
Injection Molding
Higher melt temperature ensures proper flow. Warmer mold improves surface finish, cooler mold reduces cycle times.
Safety and Handling
Personal Protection
Wear appropriate personal protective equipment during processing.
Ventilation
Process in well-ventilated areas to ensure proper air circulation.
Documentation
Refer to Safety Data Sheet (SDS) for detailed handling information.
Disclaimer
The information provided in this document is based on publicly available data and is intended for general informational purposes only. It is not a substitute for the official product documentation provided by LyondellBasell. Users of Lupolen 4261 A HDPE are strongly advised to consult the latest official technical data sheets, safety data sheets, and processing guidelines from the manufacturer to ensure the suitability of the material for their specific application and processing conditions.