Description
SK PRIMACOR 3330 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, plastic tube laminates and multilayer composite structures.
PRIMACOR 3330 combines good hot-tack, sealability, toughness, oil resistance and low sensitivity to moisture. Compared with standard polyethylene, it contains acrylic acid groups, which help improve bonding performance to polar substrates and packaging structures that require stable adhesion and sealing performance.
Key Features
– Excellent adhesion to paper, paperboard, metals and polyethylene
– Excellent hot-tack and sealability
– Good toughness for flexible packaging structures
– Excellent oil and grease resistance
– Low sensitivity to moisture
– Suitable for extrusion coating and co-extrusion coating
– Can be used as an adhesive or sealant layer
– Suitable for flexible packaging laminates and plastic tube laminates
– Good processing performance in extrusion lamination
– No antiblock and no slip additives
Applications
– Extrusion coating
– Co-extrusion coating
– Extrusion lamination
– Flexible packaging laminates
– Plastic tube laminates
– Paper and paperboard coating
– Aluminum foil lamination
– Polyethylene bonding layer
– Sealant layer for multilayer 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) | 5.8 g/10min | 5.8 g/10min | ASTM D1238 / ISO 1133 |
| Resin Properties | Comonomer Content | 6.5% | 6.5% | SK Method |
| Resin Properties | Vicat Softening Temperature | 185°F | 85.0°C | ASTM D1525 / ISO 306/A |
| Resin Properties | Melting Temperature (DSC) | 212°F | 100°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 | 1210 psi | 8.34 MPa | ASTM D638 / ISO 527-2 |
| Mechanical Properties | Tensile Strength at Break, Compression Molded | 2530 psi | 17.4 MPa | ASTM D638 / ISO 527-2 |
| Mechanical Properties | Tensile Elongation at Break, Compression Molded | 520% | 520% | ASTM D638 / ISO 527-2 |
| Extrusion | Melt Temperature | 500–554°F | 260–290°C | — |
| Extrusion | Minimum Coating Thickness | 0.80 mil | 20 μm | SK Method |
| Extrusion | Minimum Coating Weight | 12 lb/ream | 20 g/m² | SK Method |
| Extrusion | Neck-in, 550°F (288°C), 1.0 mil (25.4 μm) | 2.0 in | 50.8 mm | SK Method |
Typical Extrusion Conditions
PRIMACOR 3330 can be processed under typical extrusion coating conditions. According to the technical data, 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 3330 complies with US FDA 21 CFR 177.1310(a)(1) and EU No 10/2011. The 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 3330 is a medium acrylic acid content EAA resin with 6.5% comonomer content and a melt index of 5.8 g/10min. It is suitable for customers who need a balance of adhesion, sealability, toughness and extrusion coating performance.
This grade is especially suitable for flexible packaging laminates, plastic tube 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 3330?
SK PRIMACOR 3330 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 3330?
The comonomer content of PRIMACOR 3330 is 6.5%, based on SK test method.
3. What is the melt index of PRIMACOR 3330?
The melt index is 5.8 g/10min under 190°C / 2.16 kg test conditions.
4. What is the density of PRIMACOR 3330?
The density of PRIMACOR 3330 is 0.932 g/cm³.
5. What is the melting temperature of PRIMACOR 3330?
The melting temperature is 100°C by DSC method.
6. What applications is PRIMACOR 3330 suitable for?
It is suitable for extrusion coating, co-extrusion coating, extrusion lamination, flexible packaging laminates, plastic tube laminates, paper coating and multilayer packaging structures.
7. Can PRIMACOR 3330 be used for aluminum foil lamination?
Yes. PRIMACOR 3330 can be used in lamination structures where adhesion to metals, paper, paperboard or polyethylene is required.
8. Does PRIMACOR 3330 contain slip or antiblock additives?
No. According to the technical data, PRIMACOR 3330 does not contain slip or antiblock additives.
9. Is PRIMACOR 3330 suitable for food packaging?
PRIMACOR 3330 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 3330?
Shenzhen Ruiqing International Trade Co., Ltd. can provide PRIMACOR 3330 and other SK EAA series grades, including quotation, lead time, TDS, SDS, COA and bulk supply support.
