Introduction
PRIMACOR™ 5990I by SK Chemicals is a thermoplastic ethylene acrylic acid copolymer. It is used in adhesives and heat sealing. It provides low heat seal temperature, high hot tack, high gloss, very good clarity, water-, grease- and oil resistance. It also offers adhesion to metallic, cellulosic, glass and other substrates and low odor. PRIMACOR™ 5990I gives easy processing.
PRIMACOR™ 5990I Copolymer exhibits:
· Dispersible in aqueous amines and alkali
· “Clean” dispersion requires no salts, surfactants or solvents
· Dispersions use existing waterbourne application equipment
· Low heat seal temperature, high hot tack
· High gloss, excellent clarity
· Excellent water, grease and oil resistance
· Low odor
Parameters
| Nominal Value (English) | Nominal Value (SI) | Test Method | ||
Resin | Density | 0.955 g/cm3 | 0.955 g/cm3 | ASTM D792 ISO 1183 |
Melt Index (2.16 kg @125℃)1 | 65 g/10min | 65 g/10min | ASTM D1238 | |
| Comonomer Content3 | 20.0 % | 20.0 % | SK Method | |
| Vicat Softening Temperature | 104 ℉ | 40.0 ℃ | ASTM D1525 ISO 306 | |
| Melting Temperature (DSC) | 167 ℉ | 75.0 ℃ | SK Method | |
Mechanical | Tensile Modulus-2% Secant | 3200 psi | 22.1 MPa | ASTM D638 |
Tensile Strength at Break | 900 psi | 6.21 MPa | ASTM D638 ISO 527-2 | |
Tensile Elongation at Break (Compression Molded) | 350 % | 350 % | ASTM D638 ISO 527-2 |
1 As measured at the time of production.
2 Melt Index values are correlated from Melt Flow Rate (ASTM D 1238 conditions of 125℃/2.16 kg).
3 Comonomer content measured by a SK proprietary method that has equivalent accuracy as compared to ASTM D 4094.
Application
Ethylene and acrylic acid (EAA) copolymer resins offer excellent adhesion to polar substrates without the need for primers. Applications include liquid aseptic, dry-food and laminated tube container packaging, and cable shielding.
· Adhesives
· Laminations
· Foil priming
· Heat sealing
· Nonwoven binding
· Metal/paper coating
Features
• Adhesion to a range of polar substrates including metallized films, papers, iron, steel and glass
• Balance of adhesion onto the substrates and interlayer adhesion with coextruded LDPE and EVAs
• Formulations can be UV-stabilized for use in outdoor applications
• High bond resistance when used to pack acidic food products
• Coextrusion adhesive resin for polyamides
• Sealing performance: very low temperature sealing with high seal strengths, high hot-tack forces and good seal-through contamination
Extrusion Notes
Equipment used to process this resin should be constructed of corrosion resistant materials. Dies and adapters are
recommended to be stainless and/or duplex chrome or nickel plated.
Notes
These are typical values and are not be construed as specifications. The physical properties are highly dependent on the
manufacturing conditions. So customers should confirm performances by their own tests.
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