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XANTU.LAYR® is a unique interlaminar reinforcement veil consisting of tough thermoplastic nanofibres which have the ability to greatly enhance the performance of composite materials.

 

XANTU.LAYR® has the ability to improve composite mechanical properties, especially interlaminar fracture toughness, impact resistance and fatigue life, without having detrimental effects on other mechanical and physical properties.

 

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Mode 1:
Crack Opening

Crack energy release rates (crack onset) were obtained for MTM57/T700S

(24K)-33-35%RW using the Double Cantilever Beam test and the Modified Beam Theory in ASTM D 5528.

Mode 2:
Crack Sliding

Crack energy release rates (crack onset) were obtained for MTM57/T700S

(24K)-33-35%RW using the End Notch Flexure test and the method stated in the ASTM draft standard test method for determination of Mode 2 interlaminar fracture toughness.

Compression After Impact Strength
 

CAI tests were performed on 16 ply QI laminates made from SE70/VRC/200/400/35+/-3% UD prepreg interleaved with nanofibre veils in accordance with ASTM D7136/D7136M and ASTM D7137/D7137M.

Fatigue Resistance
 

CAI tests were performed on 16 ply QI laminates made from SE70/VRC/200/400/35+/-3% UD prepreg interleaved with nanofibre veils in accordance with ASTM D3479/D3479M Standard Test Method for Tension-Tension Fatigue of Polymer Matrix Composite Materials.

 
Electrospinning
 

Nanofibres are produced by a process called electrospinning, where an electrical charge is used to draw very fine fibres from a liquid. While electrospinning has been around since the early 1900’s, there has been little commercialisation of electrospun materials due to the lack of commercial production capacity. With some smart innovative thinking, Revolution Fibres has developed Sonic Electrospinning Technology, which gives us the capability to produce nanofibres on an industrial scale.

The Electrospinning Process
 

Electrospinnable polymers are dissolved in a liquid and then supercharged with up to 100,000 volts of electricity. Using the laws of attraction, tiny fibres leap out of the supercharged liquid at 80 m/s, spinning and spiralling until they settle onto a substrate. Only a scanning electron microscope can reveal the individual nano-scale fibres that this process can create.

Continuous Fibre
 

The electrospinning process creates non-woven mats, or veils, consisting of millions of continuous nanofibres. Individual nanofibres are drawn out from the supercharged liquid and continue to form until they are kilometres long. This process is comparable to how spiders spin their webs. The end result is a fine non-woven veil thousands of layers thick, yet only weighing a few grams per square metre.

Non-Woven Veils
 

The nanofibre veil material is deposited on a silicone release paper, which is then wound up in roll form onto a 76mm core. Nanofibre areal weight and fibre diameter can be closely monitored to maintain product quality and consistency. Rolls are typically 1m wide, but can be slit to customer specified widths if required.

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