SK Primacor™ 5980I is an ethylene acrylic acid copolymer that provides outstanding adhesion to metallic, cellulosic, glass, and various other substrates. In dispersion form, 5980I EAA resin can be used effectively as a foil primer or laminating adhesive for polyethylene and metallized substrates. In summary, this resin is widely used in applications that require strong adhesion to polar materials.

Property

Typical Value

Remarks

Acrylic acid content

20 wt%

Provides polarity and adhesion.

Melt Index (190 °C / 2.16 kg)

300g/10 min

High flow for coating and adhesive applications.

Appearance

Transparent pellets

Easy to handle and process.

Adhesion

Excellent

Especially to polar substrates.

Water dispersibility

Good (in specific grades)

Enables water-based coating applications.

Key Characteristics of Primacor™ 5980I

Excellent Adhesion

  • Outstanding bonding strength to metal, glass, paper, cellulose, and polar plastics.
  • Forms strong heat-bonded joints when used as hot-melt film or adhesive resin.

Good Processing Flowability

  • High melt flow rate allows thin-film extrusion, coating, or blending applications.
  • Compatible with water-based coating systems in dispersion form.

Thermoplastic and Heat-Seal Properties

  • Suitable for hot-melt adhesives, transfer films, heat-seal coatings, and decorative laminations.
  • Exhibits low sealing temperature and good hot tack strength.

Optical Clarity. EAA Primacor™ 5980I Can produce clear, glossy coatings and films with good surface appearance.

Food-Contact Compatibility. May be used in food packaging and hygiene materials, subject to local regulatory approval (e.g., FDA, EU).

Typical Applications

  • In paper coating, SK Primacor™ 5980I enhances the bond between paper or paperboard and substrates such as metal, plastic, or glass, significantly improving coating durability and resistance to delamination.
  • In hot-melt adhesive film applications, the resin is commonly used for packaging films, transfer graphics, and logo heat-transfer labels, providing excellent heat-seal strength and flexibility.
  • When formulated into water-based adhesives, Primacor™ 5980I serves as a polar modifier or adhesion promoter, improving the bonding performance of adhesive systems on difficult-to-adhere surfaces.
  • It also plays an important role in multilayer lamination structures, where it bonds metalized films, aluminum foil, paper, and glass to other materials, ensuring strong interlayer adhesion in packaging and industrial composites.
  • Additionally, the resin is often used as a surface primer or tie layer in multilayer extrusion processes to promote adhesion between incompatible polymer layers.

Processing & Handling Guidelines

  • Processing Temperature: Use appropriate melt temperatures to ensure good flow and adhesion (typically around 100–150 °C for dispersion drying, or 200–260 °C for melt processing).
  • Substrate Preparation: Surfaces should be clean and free from oil, release agents, or dust to maximize adhesion.
  • Waterborne Applications: Ensure balanced dispersion stability and drying conditions for film formation.
  • Hot-Melt Film Applications: Optimize bonding parameters (temperature, pressure, dwell time) to achieve uniform adhesion without damaging the substrate.
  • Regulatory Compliance: Check relevant FDA/EU food-contact approvals for specific uses.
  • Storage Conditions: Store in a cool, dry area away from direct sunlight and moisture.
  • Compatibility: Test blending compatibility with other resins, tackifiers, and additives before large-scale use.

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