Description
SK PRIMACOR 1321 is an EAA resin, also known as Ethylene Acrylic Acid Copolymer. It is suitable for extruded blown film and cast film applications. This grade is specifically designed for use as an adhesive layer in composite films or as a sealant layer in flexible packaging structures.
PRIMACOR 1321 provides good interlayer adhesion to PE and PA, good optical properties, excellent toughness and strength, excellent environmental stress crack resistance and product resistance. It also offers good hot-tack, sealability and low sensitivity to moisture. With 6.5% comonomer content and a melt index of 2.6 g/10min, PRIMACOR 1321 is suitable for multilayer film and food packaging applications where adhesion, toughness and sealing reliability are important.
Key Features
– Good interlayer adhesion to PE and PA
– Good optical properties
– Excellent toughness and strength
– Excellent environmental stress crack resistance
– Good product resistance
– Good hot-tack and sealability
– Low sensitivity to moisture
– Suitable for extruded blown film
– Suitable for cast film applications
– Can be used as an adhesive layer in composite films
– Can be used as a sealant layer in flexible packaging structures
– No antiblock and no slip additives
Applications
– Extruded blown film
– Cast film
– Multilayer films
– Food packaging
– Flexible packaging structures
– Composite films
– PE / PA multilayer film structures
– Adhesive layer for composite packaging
– Sealant layer for flexible packaging
– Packaging films requiring toughness and clarity
– Food contact packaging structures
– Industrial flexible packaging
Properties
| Category | Property | Nominal Value (English) | Nominal Value (SI) | Test Method |
|---|---|---|---|---|
| Resin Properties | Density | 0.935 g/cm³ | 0.935 g/cm³ | ASTM D792 / ISO 1183 |
| Resin Properties | Melt Index, 2.16 kg @190°C | 2.6 g/10min | 2.6 g/10min | ASTM D1238 / ISO 1133 |
| Resin Properties | Comonomer Content | 6.5% | 6.5% | SK Method |
| Resin Properties | Vicat Softening Temperature | 192°F | 88.9°C | ASTM D1525 / ISO 306 |
| Resin Properties | Melting Temperature, DSC | 217°F | 103°C | SK Method |
| Mechanical Properties | Tensile Strength at Yield, Compression Molded | 1460 psi | 10.0 MPa | ASTM D638 / ISO 527-2/508 |
| Mechanical Properties | Tensile Strength at Break, Compression Molded | 2910 psi | 20.1 MPa | ASTM D638 / ISO 527-2/508 |
| Mechanical Properties | Tensile Elongation at Break, Compression Molded | 640% | 640% | ASTM D638 / ISO 527-2/508 |
| Film Properties | Film Thickness | 2.0 mil | 50.8 μm | ASTM D374 |
| Film Properties | Haze | 3.7% | 3.7% | ASTM D1003 / ISO 14782 |
| Film Properties | Gloss, 45° | 76 | 76 | ASTM D2457 |
| Film Properties | Dart Drop Impact | 410 g | 410 g | ASTM D1709B / ISO 7765-1/B |
| Film Properties | Elmendorf Tear Strength, MD | 270 g | 270 g | ASTM D1922 / ISO 6383-2 |
| Film Properties | Elmendorf Tear Strength, TD | 390 g | 390 g | ASTM D1922 / ISO 6383-2 |
| Film Properties | Tensile Strength at Yield, MD | 1640 psi | 11.3 MPa | ASTM D882 / ISO 527-3 |
| Film Properties | Tensile Strength at Yield, TD | 1620 psi | 11.1 MPa | ASTM D882 / ISO 527-3 |
| Film Properties | Tensile Strength at Break, MD | 4610 psi | 31.8 MPa | ASTM D882 / ISO 527-3 |
| Film Properties | Tensile Strength at Break, TD | 4620 psi | 31.9 MPa | ASTM D882 / ISO 527-3 |
| Film Properties | Tensile Elongation at Break, MD | 460% | 460% | ASTM D882 / ISO 527-3 |
| Film Properties | Tensile Elongation at Break, TD | 510% | 510% | ASTM D882 / ISO 527-3 |
Typical Extrusion Conditions
PRIMACOR 1321 can be processed under typical blown film extrusion conditions. Reference processing conditions include a screw size of 2.5 inches, 30:1 L/D, single flight screw with Maddock mixer, die gap of 40 mil, die diameter of 6 inches and melt temperature around 380°F or 193°C.
Typical output is 6 lb/hr/in. of die circumference, equivalent to 1.07 kg/hr/cm of die circumference. Reference blow-up ratio is 2.5:1, and frost line height is 29 inches, or 737 mm.
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 1321 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 1321 is an EAA resin with 6.5% comonomer content and a melt index of 2.6 g/10min. It is designed for blown film and cast film applications where interlayer adhesion, toughness, optical properties, hot-tack and sealability are important.
This grade is especially suitable for multilayer films and food packaging. Compared with standard polyethylene, PRIMACOR 1321 can improve adhesion between PE and PA layers, while also providing good sealability, toughness and environmental stress crack resistance in flexible packaging structures.
FAQ
1. What is SK PRIMACOR 1321?
SK PRIMACOR 1321 is an EAA resin, also known as Ethylene Acrylic Acid Copolymer. It is suitable for extruded blown film and cast film applications.
2. What is the acrylic acid content of PRIMACOR 1321?
The comonomer content of PRIMACOR 1321 is 6.5%, based on SK test method.
3. What is the melt index of PRIMACOR 1321?
The melt index is 2.6 g/10min under 190°C / 2.16 kg test conditions.
4. What is the density of PRIMACOR 1321?
The density of PRIMACOR 1321 is 0.935 g/cm³.
5. What is the melting temperature of PRIMACOR 1321?
The melting temperature is 103°C by DSC method.
6. What is the Vicat softening temperature of PRIMACOR 1321?
The Vicat softening temperature is 88.9°C.
7. What applications is PRIMACOR 1321 suitable for?
It is suitable for extruded blown film, cast film, multilayer films, food packaging, composite films and flexible packaging structures.
8. Can PRIMACOR 1321 be used as an adhesive layer?
Yes. PRIMACOR 1321 is designed for use as an adhesive layer in composite films and as a sealant layer in flexible packaging structures.
9. What substrates can PRIMACOR 1321 bond to?
PRIMACOR 1321 provides good interlayer adhesion to PE and PA, making it suitable for multilayer film structures.
10. What are the key advantages of PRIMACOR 1321?
Its key advantages include good interlayer adhesion, optical properties, toughness, strength, environmental stress crack resistance, hot-tack, sealability and low moisture sensitivity.
11. Does PRIMACOR 1321 contain slip or antiblock additives?
No. According to the technical data, PRIMACOR 1321 does not contain slip or antiblock additives.
12. Can PRIMACOR 1321 be used for food packaging?
Yes. PRIMACOR 1321 is suitable for food packaging applications and complies with US FDA 21 CFR 177.1310(a)(1) and EU No 10/2011. Final use should be verified based on the actual packaging structure and regulatory requirements.
13. Can Shenzhen Ruiqing International Trade Co., Ltd. supply PRIMACOR 1321?
Shenzhen Ruiqing International Trade Co., Ltd. can provide PRIMACOR 1321 and other SK EAA series grades, including quotation, lead time, TDS, SDS, COA and bulk supply support.
