Primacor™ 3460 EAA copolymer is suitable for extrusion coating and extrusion lamination applications, commonly used as a sealing layer, adhesive layer, or paper coating in flexible packaging laminates.

Property

Typical Value

Density

0.938 g/cm³

Melt Index (190 °C / 2.16 kg)

20 g/10 min

Acrylic Acid Content

9.7 wt%

Melting Point (DSC)

95 °C

Vicat Softening Point

72.2 °C

Tensile Strength (Break)

16.2 MPa

Elongation at Break

580%

Seal Initiation Temperature

85°C

Minimum Coating Thickness

10 µm (0.40 mil)

Performance Features of SK Primacor™ 3460

1. Excellent Heat-Seal and Hot-Tack Performance. It is specifically formulated for high-speed production and low processing temperatures, providing reliable seal initiation and hot-tack strength.

2. Outstanding Adhesion. Bonds effectively to metallized substrates, paper/paperboard, and polyethylene, making it ideal for multilayer laminations.

3.High Toughness and Environmental Stress Crack Resistance (ESCR). EAA Primacor™ 3460 copolymer offers excellent flexibility and resistance to cracking in film and laminate applications.

4. Moisture Resistance. This resin maintains adhesion and structural integrity even under humid conditions.

5. Optimized for High-Speed Processing. SK Primacor™ 3460 copolymer is designed to perform efficiently in fast extrusion coating and lamination operations without compromising film quality or adhesion.

Typical Applications

  1. Acts as a sealing or adhesive layer in flexible packaging laminates, bonding metallized films, aluminum foil, paper/paperboard, and PE films.
  2. Used in thin paper coating processes to provide adhesion or coating functionality to paper substrates.
  3. Suitable for metallic substrate laminations, such as metallized films or aluminum foils combined with plastic or paper layers.
  4. Ideal for applications requiring heat-seal performance, strong adhesion, rapid processing, and low-temperature extrusion/lamination.

Processing and Handling Guidelines

  • Equipment: Use corrosion-resistant components (stainless steel or nickel/chrome-plated metals), as EAA’s carboxylic acid groups may attack unprotected metal surfaces.
  • Processing Temperature: Typically 220–260 °C, adjustable according to equipment and die design.
  • Substrate Preparation: Surfaces must be clean, dry, and free of oils or mold-release agents for optimal adhesion.
  • Storage: Keep in a cool, dry, ventilated area; avoid moisture.
  • Food Contact Compliance: Confirm that the product and its processing comply with local regulations (FDA, EU) when used for food or beverage packaging.
  • Multilayer Lamination Design: Optimize sealing parameters (temperature, pressure, dwell time), coating thickness, and extrusion line speed to ensure layer adhesion and structural stability.

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