Description
SK PRIMACOR 3340 is an EAA resin, also known as Ethylene Acrylic Acid Copolymer. It is designed for use as an adhesive or sealant layer in extrusion coating, co-extrusion coating and extrusion lamination. This material provides excellent adhesion to paper, paperboard, metals and polyethylene, making it suitable for flexible packaging laminates, liquid packaging board laminates and multilayer composite structures.
PRIMACOR 3340 combines excellent hot-tack performance, good sealability, oil and grease resistance and low sensitivity to moisture. Compared with standard polyethylene, this EAA resin contains acrylic acid groups, which help improve adhesion to polar substrates and provide reliable bonding performance in packaging and lamination applications.
Key Features
– Excellent adhesion to paper, paperboard, metals and polyethylene
– Excellent hot-tack and sealability
– Good oil and grease resistance
– Low sensitivity to moisture
– Suitable for extrusion coating and co-extrusion coating
– Designed for adhesive or sealant layer applications
– Good processing performance in extrusion lamination
– Suitable for flexible packaging laminates
– Suitable for liquid packaging board laminates
– No antiblock and no slip additives
Applications
– Extrusion coating
– Co-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
Properties
| Category | Property | Nominal Value (English) | Nominal Value (SI) | Test Method |
|---|---|---|---|---|
| Resin Properties | Density | 0.932 g/cm³ | 0.932 g/cm³ | ASTM D792 / ISO 1183 |
| Resin Properties | Melt Index (2.16 kg @190°C) | 9.0 g/10min | 9.0 g/10min | ASTM D1238 / ISO 1133 |
| Resin Properties | Comonomer Content | 6.5% | 6.5% | SK Method |
| Resin Properties | Vicat Softening Temperature | 183°F | 83.9°C | ASTM D1525 / ISO 306/A |
| Resin Properties | Melting Temperature (DSC) | 214°F | 101°C | SK Method |
| Film Properties | Seal Initiation Temperature | 199°F | 92.8°C | SK Method |
| Film Properties | Water Vapor Transmission Rate, 100°F (38°C), 90% RH | 1.0 g·mil/100in²/atm/24hr | 0.40 g·mm/m²/atm/24hr | DIN 53122/2 |
| Mechanical Properties | Tensile Strength at Yield, Compression Molded | 1150 psi | 7.93 MPa | ASTM D638 / ISO 527-2 |
| Mechanical Properties | Tensile Strength at Break, Compression Molded | 2500 psi | 17.2 MPa | ASTM D638 / ISO 527-2 |
| Mechanical Properties | Tensile Elongation at Break, Compression Molded | 630% | 630% | ASTM D638 / ISO 527-2 |
| Extrusion | Melt Temperature | 500–554°F | 260–290°C | — |
| Extrusion | Minimum Coating Thickness | 0.50 mil | 13 μm | SK Method |
| Extrusion | Minimum Coating Weight | 7.5 lb/ream | 12 g/m² | SK Method |
| Extrusion | Neck-in | 2.8 in | 69.9 mm | SK Method |
Typical Extrusion Conditions
PRIMACOR 3340 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 3340 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 specific product structure, processing conditions and local regulatory requirements.
Additives information:
– Antiblock: No
– Slip: No
Product Summary
SK PRIMACOR 3340 is a medium acrylic acid content EAA resin with 6.5% comonomer content and a melt index of 9.0 g/10min. Compared with lower melt index grades, PRIMACOR 3340 offers higher flowability, which can be helpful in extrusion coating and lamination processes that require stable coating performance and thinner coating layers.
This grade is especially suitable for flexible packaging laminates, liquid packaging board laminates, paper coating, aluminum foil lamination and multilayer packaging structures. It can help improve adhesion between different substrates and provide reliable sealing performance in composite packaging applications.
FAQ
1. What is SK PRIMACOR 3340?
SK PRIMACOR 3340 is an EAA resin, also known as Ethylene Acrylic Acid Copolymer. It is designed as an adhesive or sealant layer for extrusion coating, co-extrusion coating and extrusion lamination.
2. What is the acrylic acid content of PRIMACOR 3340?
The comonomer content of PRIMACOR 3340 is 6.5%, based on SK test method.
3. What is the melt index of PRIMACOR 3340?
The melt index is 9.0 g/10min under 190°C / 2.16 kg test conditions.
4. What is the density of PRIMACOR 3340?
The density of PRIMACOR 3340 is 0.932 g/cm³.
5. What is the melting temperature of PRIMACOR 3340?
The melting temperature is 101°C by DSC method.
6. What applications is PRIMACOR 3340 suitable for?
It is suitable for extrusion coating, co-extrusion coating, extrusion lamination, flexible packaging laminates, liquid packaging board laminates, paper coating and multilayer packaging structures.
7. What is the difference between PRIMACOR 3340 and PRIMACOR 3330?
Both grades have 6.5% comonomer content. PRIMACOR 3340 has a higher melt index of 9.0 g/10min, while PRIMACOR 3330 has a melt index of 5.8 g/10min. PRIMACOR 3340 is generally more suitable when higher flowability is required.
8. Can PRIMACOR 3340 be used for liquid packaging board laminates?
Yes. PRIMACOR 3340 is suitable for liquid packaging board laminates and flexible packaging laminates.
9. Does PRIMACOR 3340 contain slip or antiblock additives?
No. According to the technical data, PRIMACOR 3340 does not contain slip or antiblock additives.
10. Can Shenzhen Ruiqing International Trade Co., Ltd. supply PRIMACOR 3340?
Shenzhen Ruiqing International Trade Co., Ltd. can provide PRIMACOR 3340 and other SK EAA series grades, including quotation, lead time, TDS, SDS, COA and bulk supply support.
