Our Corecork range of products enhance the scope of core materials for composite structures with unique properties.

Cork’s elastic structure composed of closed air-filled impermeable cells brings features such as noise and vibration attenuation as well as thermal insulation, making it a versatile core alternative for open and closed mold processes in the composites industry.

Its specific formulation ensures a natural perforation for resin impregnation, while cork’s closed cell structure reduces resin consumption and therefore bringing lightness and cost savings overall. It also has proven compatibility to all resins used in the industry such as polyester, vinyl-ester, epoxy and phenolic.

The benefits from using the Corecork range of materials goes beyond function and into the manufacturing process, assisting manufacturers in obtaining an immediate high-quality surface finish, due to outstanding print through blocking capability enhanced by its inherent thermal insulation property, reducing rework and increasing productivity.

Perfectly aligned with the philosophy of renewable energy, Corecork is the green material for green energy production. Renewable energy equipment like wind turbine blades are often subject to the unpredictable power of nature, Corecork’s functionality introduces damping into the composite structure reducing structural vibration and noise generation whilst adding surface shock resistance, it also serves as a thermal delay in the composite for deicing mechanisms.

As in all models of mobility today such as marine, bus, coach or rail, the need to reduce weight to lower energy costs and increase multi-functionality to products has become paramount. Our core materials can be found in a number of different components and applications such as interior side and ceiling panels, floor panels, sanitary booth and exterior body panels bringing weight reduction, acoustic and thermal comfort as well as savings and better aesthetics to the final product. 

The Sports & Leisure industry has grown considerably and so has the usage of Corecork in such applications, from surfboards, kayaks, windsurfing boards, paddle boards, karts to small sailing boats. Our core materials are preferred due to the need for shock and impact resistance, as well as resilience and lightness which are imperative to guarantee a superior performance and a long-lasting product.

Technical Datasheet

Highlights:

·         Good drapeability

·         Print blocking capability

·         Stable material

·         Lower resin consumption

·         Resin compatibility (Excellent for: Epoxy, Polyester, Phenolic, Vinylester and Polyurethane)

·         Flexibility and excellent conformability make NL20 possible to be easily integrated into fast production cycles.

·         This product can be processed by hand layup, vacuum bagging and infusion processes and will withstand manufacturing temperatures up to 150ºC.

·         The unique properties of NL20 such as: a closed air-filled cell structure, low water absorption, rot resistance and high level of noise and vibration attenuation make it an excellent material for to the composites industry - perfectly aligned with the new green classifications.

Mechanical Properties of the Core Material

Density (Kg/m3)

ASTM C271

170-235

Compressive Strength (MPa)

ASTM C365

0.5

Compressive Modulus (MPa)

ASTM C365

6.0

Tensile Strength (MPa)

ASTM C297

0.7

Shear Strength (MPa)

ASTM C273

0.9

Shear Modulus (MPa)

ASTM C273

5.9

Thermal Conductivity (W/mK)

ASTM E1530

0.044

Loss Factor (at 1 KHz)

ASTM E756

0.043

Mechanical Properties of the Core Material in a Composite

Flexural Strength at Yield (MPa)

ASTM D790

56

Flexural Modulus (GPa)

ASTM D790

4

Shear Strength at Yield (MPa)

ASTM C392

0.9

Shear Modulus (MPa)

ASTM C392

41

Compressive Strength at Yield (MPa)

ASTM C365

2.2

Compressive Modulus (MPa)

ASTM C365

23

Water Absorption (%)

ASTM C272

<4

Panel Density

N/A

0.560

Process Guidelines

Resin Uptake (per m2 at 1mm)

170g

Maximum Processing Temperature

180oC

Vacuum Bag Processing

Up to 150oC

Autoclave Cure Processing

Possible

Coefficient of Thermal Expansion (ASTM E831-06)

Approx. 110 x 10-6/oC at RT