Description
SK PRIMACOR 4608 is an EAA resin, also known as Ethylene Acrylic Acid Copolymer. It is suitable for extrusion coating and extrusion lamination applications. This grade is specifically designed for use as a sealant and adhesive layer in flexible packaging and liquid packaging laminates.
PRIMACOR 4608 provides excellent heat sealability, hot tack, adhesion to metallic, paper and polyethylene substrates, excellent draw down, good oil and grease resistance and low sensitivity to moisture. With 6.5% comonomer content and a melt index of 7.8 g/10min, it offers a balanced combination of adhesion, coating stability and processability for packaging laminate structures.
Key Features
– Excellent heat sealability and hot tack
– Excellent adhesion to metallic, paper and polyethylene substrates
– Excellent draw down performance
– Good oil and grease resistance
– Low sensitivity to moisture
– Suitable for extrusion coating and extrusion lamination
– Designed for sealant and adhesive layer applications
– Suitable for flexible packaging laminates
– Suitable for liquid packaging board laminates
– No antiblock and no slip additives
Applications
– Extrusion coating
– Extrusion lamination
– Flexible packaging laminates
– Liquid packaging board laminates
– Paper and paperboard coating
– Aluminum foil lamination
– Polyethylene bonding layer
– Sealant layer for multilayer packaging structures
– Food packaging composite structures
– Oil and grease resistant packaging
– Industrial flexible packaging
– Packaging structures requiring strong heat sealability and hot tack
Properties
| Category | Property | Nominal Value (English) | Nominal Value (SI) | Test Method |
|---|---|---|---|---|
| Resin Properties | Density | 0.934 g/cm³ | 0.934 g/cm³ | ASTM D792 / ISO 1183 |
| Resin Properties | Melt Index (2.16 kg @190°C) | 7.8 g/10min | 7.8 g/10min | ASTM D1238 / ISO 1133 |
| Resin Properties | Comonomer Content | 6.5% | 6.5% | SK Method |
| Resin Properties | Vicat Softening Temperature | 187°F | 86.1°C | ASTM D1525 / ISO 306 |
| Resin Properties | Melting Temperature (DSC) | 210°F | 98.9°C | SK Method |
| Film Properties | Seal Initiation Temperature | 194°F | 90.0°C | SK Method |
| Film Properties | Water Vapor Transmission Rate, 100°F (38°C), 90% RH | 0.95 g·mil/100in²/atm/24hr | 0.37 g·mm/m²/atm/24hr | DIN 53122/2 |
| Mechanical Properties | Tensile Strength at Yield, Compression Molded | 1080 psi | 7.45 MPa | ASTM D638 / ISO 527-2 |
| Mechanical Properties | Tensile Strength at Break, Compression Molded | 2880 psi | 19.9 MPa | ASTM D638 / ISO 527-2 |
| Mechanical Properties | Tensile Elongation at Break, Compression Molded | 590% | 590% | ASTM D638 / ISO 527-2 |
| Extrusion | Melt Temperature | 500–554°F | 260–290°C | — |
| Extrusion | Minimum Coating Thickness | 0.35 mil | 8.9 μm | SK Method |
| Extrusion | Minimum Coating Weight | 5.3 lb/ream | 8.6 g/m² | SK Method |
| Extrusion | Neck-in | 3.3 in | 83.8 mm | SK Method |
Typical Extrusion Conditions
PRIMACOR 4608 can be processed under typical extrusion coating conditions. Reference processing conditions include a screw size of 3.5 inches, 30:1 L/D, die gap of 20 mil, melt temperature around 550°F or 288°C, output of 250 lb/hr and air gap of 6 inches.
For better processing stability, equipment used for this resin should be constructed with corrosion-resistant materials. Dies and adapters are recommended to be stainless steel, duplex chrome plated or nickel plated.
Compliance and Additives
PRIMACOR 4608 complies with US FDA 21 CFR 177.1310(a)(1) and EU No 10/2011. Final suitability for food contact or packaging applications should be confirmed according to the customer’s final product structure, processing conditions and local regulatory requirements.
Additives information:
– Antiblock: No
– Slip: No
Product Summary
SK PRIMACOR 4608 is a medium acrylic acid content EAA resin with 6.5% comonomer content and a melt index of 7.8 g/10min. It is designed for extrusion coating and extrusion lamination applications where strong heat sealability, hot tack and adhesion to paper, metal and polyethylene substrates are required.
This grade is especially suitable for flexible packaging laminates and liquid packaging board laminates. Compared with standard polyethylene, PRIMACOR 4608 can improve adhesion performance and sealing reliability in multilayer packaging structures.
FAQ
1. What is SK PRIMACOR 4608?
SK PRIMACOR 4608 is an EAA resin, also known as Ethylene Acrylic Acid Copolymer. It is used as a sealant and adhesive layer for extrusion coating and extrusion lamination applications.
2. What is the acrylic acid content of PRIMACOR 4608?
The comonomer content of PRIMACOR 4608 is 6.5%, based on SK test method.
3. What is the melt index of PRIMACOR 4608?
The melt index is 7.8 g/10min under 190°C / 2.16 kg test conditions.
4. What is the density of PRIMACOR 4608?
The density of PRIMACOR 4608 is 0.934 g/cm³.
5. What is the melting temperature of PRIMACOR 4608?
The melting temperature is 98.9°C by DSC method.
6. What applications is PRIMACOR 4608 suitable for?
It is suitable for extrusion coating, extrusion lamination, flexible packaging laminates, liquid packaging board laminates, paper coating, aluminum foil lamination and multilayer packaging structures.
7. What substrates can PRIMACOR 4608 bond to?
PRIMACOR 4608 provides excellent adhesion to metallic, paper and polyethylene substrates.
8. Does PRIMACOR 4608 contain slip or antiblock additives?
No. According to the technical data, PRIMACOR 4608 does not contain slip or antiblock additives.
9. Is PRIMACOR 4608 suitable for food packaging?
PRIMACOR 4608 is listed as complying with US FDA 21 CFR 177.1310(a)(1) and EU No 10/2011. Final use should be verified according to the customer’s specific packaging structure and regulatory requirements.
10. Can Shenzhen Ruiqing International Trade Co., Ltd. supply PRIMACOR 4608?
Shenzhen Ruiqing International Trade Co., Ltd. can provide PRIMACOR 4608 and other SK EAA series grades, including quotation, lead time, TDS, SDS, COA and bulk supply support.
