Mold Complex Shapes

Lingrove's signature product allows for complex curves with 3D linear grain with a natural finish quality and customizable color, opacity and fiber orientation. 

For the first time, composites parts enter the realm of designer materials with an authentic natural grain look made from long flax linen fibers. Three-dimensional Ekoa parts offer a sculpted natural look while two-dimensional panels the feel of a wood panel—all this, with the environmental stability and stiffness-to-weight only composites can offer.

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Using with Carbon Fiber

These materials are engineered to have good compatibility with carbon fiber. The elongation at fracture of 1.5% and the coefficient of thermal expansion are similar to carbon fiber. When used with carbon fiber as a core (middle layer/s), Ekoa flax linen and bio-epoxy prepregs and flax linen dry composite reinforcement fabrics reduce weight and cost while increase vibration damping properties.

The tube shown to the left, is made with two layers of Ekoatape on the surface and several subsequent layers of unidirectional carbon fiber. The effect is an authentic hard wood-like aesthetic with Ekoa contrasting subtle carbon fiber. With this type of ‘hybrid’ layup you get the damping and look of Ekoa with the added rigidity of carbon fiber. This sample has no finish but has been sanded.

 


 

Prepreg Specification

Ekoa is a fiber reinforced pre-impregnated natural composite materials with high performance and low environmental impact. Lingrove® Pre-preg resin systems are manufactured with post-industrial biobased resins and are available in a high temperature cure (250°F, 120°C) pre-preg resin system.

These resins exhibit excellent mechanical properties and improved impact resistance over conventional epoxy pre-preg systems. Lower temp cure resins are also available.
Typical fiber weight ratio: 50% (+/- 3%)
 

 

Recommended Cure Cycles

For best results a heat ramp of 1-2°/min with a dwell at 180°F (80°C) for 30 min and an
additional dwell at the minimum activation temperature for 30 min is recommended.
 

 

Processing Techniques

Process via standard composite manufacturing techniques including: compression molding, RTM, VARTM, and wet layup.

 

 

Storage

The material should be kept frozen at -18°C. It must be kept in sealed plastic bags which must
not be opened until fully thawed to room temperature. Shelf life at -18°C is no less than 12 months.

 


Health and Safety

Despite their natural derivation, exposure to these materials represents hazards typical to all
epoxy resins. Exposure should be minimized and avoided through the use of proper protective
clothing and equipment and appropriate manufacturing controls.

All persons who use, store, or transport these materials should properly understand the handling precautions and recommendations as stated in the MSDS. Please refer to the MSDS for the most up to date
Safety and Handling information.
 

 

Processing Guidelines

Near-zero CTE, hence good processing compatibility with carbon fibers.
Suitable for: Vacuum molding, autoclave molding, bladder molding (BIM), compression molding.