Caps & Closures
One of the most common grades for high-strength bottle caps and threaded closures.
HDPE 518
HDPE 518 – Injection Molding Grade Polyethylene
Product overview
HDPE 518
Product overview
HDPE 518 is a high-density polyethylene injection molding grade designed for producing strong, rigid, and durable molded components. With excellent dimensional stability and good impact resistance, HDPE 518 is widely used in producing caps and closures, industrial components, household products, and food packaging items. This grade offers smooth flow characteristics suitable for high-efficiency injection molding systems.
Introduction to HDPE 518
1
HDPE 518 is engineered for injection molding applications requiring high stiffness, reliable flow, and strong mechanical properties.
2
It offers excellent chemical resistance, impact strength, and dimensional stability making it ideal for industrial and consumer product applications.
3
518 processes efficiently in injection molding machines, allowing for fast cycle times and consistent part quality.
Applications
Household Items
Used in manufacturing containers, lids, kitchen products, and durable domestic components.
Industrial Components
Ideal for molded mechanical parts requiring stiffness and impact resistance.
Food Packaging Products
FDA-approved grade suitable for food-contact items like storage containers.
Thin-Walled Injection Parts
Excellent flow consistency for thin sections and fast-cycle molding.
Features
- High stiffness and rigidity suitable for strong molded products.
- Available in Virgin, Recycle, and Recycle Grade B options.
- Density: 0.955 – 0.960 g/cm³
- MFR (Melt Flow Rate): 8 – 12 g/10 min (190°C / 2.16 kg)
- Tensile Strength at Yield: 22 – 28 MPa (ISO 527)
- Impact Resistance: High, suitable for durable molded components
- ESCR: Good environmental stress crack resistance (ASTM D1693)
- Melting Point: 128 – 135°C
- Recommended Applications: Caps, Closures, Thin-Wall Molded Items
- Standard Compliance: FDA Food Contact, ISO 1183, ISO 527
Production Processes
Injection Molding
HDPE 518 granules are melted and injected into precision molds to create durable and consistent parts with excellent dimensional stability.
Cooling & Finishing
Molded products undergo controlled cooling, trimming, and surface quality inspection before packaging.
Nexis Group
HDPE 518
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HDPE 518