ExxonMobil™ HD 6704.18
High-Density Polyethylene Copolymer
Hexene copolymer engineered for superior toughness, stiffness, and environmental stress-cracking resistance
Product Description
ExxonMobil™ HD 6704.18 is a high-density polyethylene (HDPE) copolymer resin, engineered for applications demanding a superior balance of toughness, stiffness, and environmental stress-cracking resistance (ESCR). This hexene copolymer features a narrow molecular weight distribution, making it a robust choice for a variety of demanding industrial and packaging applications.
The resin is primarily designed for the injection molding process and is supplied in pellet form for easy handling and processing. Its formulation provides an exceptional combination of mechanical properties, ensuring durability in conditions ranging from ambient to sub-zero temperatures.
Outstanding ESCR
Enhanced resistance to chemical agents
Excellent Toughness
Superior impact strength at low temperatures
High Stiffness
Maintains shape under load
Key Features
Outstanding Environmental Stress-Cracking Resistance (ESCR)
Offers enhanced resistance to failure in the presence of aggressive chemical agents, critical for industrial containers.
Excellent Toughness and Impact Strength
Provides robust performance and durability, particularly at low temperatures, reducing breakage risk.
High Stiffness
Ensures molded parts maintain their shape under load, crucial for stacking performance and part integrity.
Narrow Molecular Weight Distribution
Contributes to good processability, dimensional stability, and consistency in finished parts.
Good Processability
Allows for efficient manufacturing cycles in injection molding operations.
FDA Compliant
Suitable for food contact applications under specific conditions per 21 CFR 177.1520.
Primary Applications
Industrial Pails & Containers
High stiffness and excellent ESCR for packaging chemicals, paints, and industrial products.
Caps & Closures
Toughness and resistance properties ensure secure sealing for industrial drums and large containers.
Packaging Drum Lids
Provides necessary rigidity and impact resistance to protect contents of large drums.
RV Components
Offers durability and weather resistance required for recreational vehicle industry components.
Key Property Highlights
Technical Data and Properties
The following table summarizes the typical physical and mechanical properties of ExxonMobil™ HD 6704.18. These values are representative and should not be considered as specifications.
| Property | Test Method (ASTM) | Unit | Typical Value |
|---|---|---|---|
| Physical Properties | |||
| Density | ExxonMobil Method | g/cm³ | 0.952 |
| Melt Flow Index (190°C/2.16kg) | D1238 | g/10 min | 4.5 |
| Environmental Stress-Cracking Resistance (ESCR, 10% Igepal, F50) | D1693B | hours | 6.0 |
| Mechanical Properties | |||
| Tensile Strength at Yield | D638 | MPa (psi) | 26.2 (3800) |
| Tensile Strength at Break | D638 | MPa (psi) | 8.27 (1200) |
| Flexural Modulus (1% Secant) | D790B | MPa (ksi) | 1310 (190) |
| Flexural Modulus (2% Secant) | D790B | MPa (ksi) | 1170 (170) |
| Notched Izod Impact Strength (@ -40°C) | D256 | J/m (ft·lb/in) | 58.7 (1.10) |
| Thermal Properties | |||
| Peak Melting Point | ExxonMobil Method | °C (°F) | ≤ 271 (≤ 520) |
| Deflection Temperature @ 0.46 MPa (66 psi) | D648 | °C (°F) | 70.0 (158) |
| Deflection Temperature @ 1.8 MPa (264 psi) | D648B | °C (°F) | 44.4 (112) |
Properties are based on compression molded samples.
Regulatory Compliance
FDA Approved for Food Contact
ExxonMobil™ HD 6704.18 is suitable for food contact applications under specific conditions.
FDA Compliance Details:
- Complies with U.S. Food and Drug Administration (FDA) regulation 21 CFR 177.1520 (Olefin polymers), paragraph (c)3.1a
- May be used for articles or components of articles intended for food contact
Usage Restrictions:
- For contact with fatty food types III, IV-A, V, VII-A, and IX (as described in 21 CFR 176.170(c)), the finished article must have a volume of at least 2 U.S. gallons (7.6 liters)
- The finished article may contact food only under Conditions of Use D through G, at temperatures not exceeding 150°F (66°C)
- Manufacturers of final food-contact articles are responsible for ensuring that their products comply with all applicable regulations for the intended end-use
Processing Guidelines
ExxonMobil™ HD 6704.18 is primarily processed via injection molding. The following are general starting recommendations and should be optimized for specific molds and machinery.
Temperature Settings
Processing Conditions
Pressure Settings
Processing Notes
Safety and Handling
Important Safety Information
- A Safety Data Sheet (SDS) for ExxonMobil high-density polyethylene grades is available and should be consulted before use
- Follow standard safety practices for processing thermoplastics
- Spilled pellets can create a slipping hazard - clean up immediately
Processing Safety
- Adequate ventilation is required in processing areas
- Remove fumes that may be generated at melt temperatures
- Use appropriate personal protective equipment
- Follow facility safety protocols