ExxonMobil LL 6407.67 LLDPE Resin

Physical Properties

• Density: Tested per ASTM D4883, the material’s density is 0.936 g/cc (0.0338 lb/in³), suited for applications requiring higher robustness.
• ESCR 10% Igepal®: Under ASTM D1693 Condition B, it shows 240 hours of environmental stress crack resistance, indicating strong chemical durability.
• Melt Flow: As per ASTM D1238, the melt flow rate is 6.8 g/10 min at 190 °C under 2.16 kg, balancing processing ease and mechanical performance.

Polymer Properties:

• Base Material: Narrow molecular weight hexene copolymer of LLDPE.
• Modification Features:
  
  • Developed for exceptional environmental stress crack resistance in harsh conditions.
  • Offers good processability with low warpage and high cold – temperature toughness.

Applications:

1. Rotomolding Applications
   The resin’s excellent ESCR, dimensional control, and processability: Make it ideal for rotomolding processes, where complex shapes and uniform wall thickness are critical.
   • Potable Water Tanks:
     LL 6407.67 is used to manufacture tanks for storing potable water due to its excellent chemical resistance and compliance with food contact regulations in certain regions .
     The resin’s toughness and ESCR ensure long-term durability against environmental stresses, such as temperature fluctuations and chemical exposure.
     Applications include residential, agricultural, and industrial water storage tanks.
   • Industrial Containers:
     Used for chemical storage tanks and containers due to its resistance to cracking under stress from aggressive chemicals.
     The resin’s dimensional stability minimizes warpage, ensuring consistent performance in large-scale containers.
   • Playground Equipment:
     The combination of toughness, low-temperature impact resistance, and UV stabilization makes LL 6407.67 suitable for outdoor playground structures.
     Its ability to maintain structural integrity under varying weather conditions ensures safety and longevity.
   • Toys:
     Employed in the production of durable, lightweight toys requiring impact resistance and safety for consumer use.
     The resin’s whiteness and ability to be colored enhance aesthetic appeal for toy manufacturing.
2. Injection Molding Applications
   The resin’s high flow characteristics  and excellent dimensional control: Make it suitable for injection molding applications requiring precision and durability.
   • Consumer Articles:
     Used in household items such as storage bins, containers, and utility products where toughness and resistance to wear are essential.
     The resin’s stiffness and low warpage ensure consistent part dimensions, making it ideal for mass production.
   • Fine-Threaded Containers:
     LL 6407.67 is used for producing containers with fine-threaded closures, such as caps and lids, due to its excellent processability and dimensional accuracy.
     Its toughness ensures that threaded components maintain integrity during repeated use.
   • Point-of-Display Cabinets:
     The resin’s whiteness and ability to produce smooth, glossy surfaces make it suitable for point-of-sale display units, where aesthetics and durability are critical.
     Its UV-4 stabilization ensures resistance to fading or degradation in retail environments with prolonged exposure to light.
3. Other Potential Applications
   While primarily designed for rotomolding and injection molding, LL 6407.67’s properties: May also support other applications, depending on specific processing capabilities and requirements:
   • Agricultural Equipment:
     Components such as fertilizer or pesticide containers benefit from the resin’s chemical resistance and durability.
     Its ability to withstand harsh environmental conditions makes it suitable for outdoor agricultural use.
   • Marine Components:
     Used in marine applications, such as buoys or dock components, where UV resistance and toughness against water exposure are crucial.

Advantages

• • Durability: Outstanding ESCR and toughness ensure long service life in demanding applications.
  • Versatility: Suitable for both rotomolding and injection molding, accommodating a wide range of product designs.
  • Aesthetic Flexibility: Whiteness and compatibility with colorants allow for visually appealing products.
  • UV Resistance: Medium-term UV-4 stabilization supports outdoor applications without significant degradation.

Limitations

• • UV Resistance: While stabilized for medium-term UV exposure, LL 6407.67 may not be suitable for applications requiring long-term UV resistance, unlike other grades such as LL 8446.21.
  • Specialized Applications: Not optimized for film applications or high-temperature stability, where other ExxonMobil grades like LL 1004YB may be preferred.