What Are The Advantages And Disadvantages Of Aramid Honeycomb? - News

What are the advantages of Aramid honeycomb?

Followed are the Advantages of Aramid honeycomb

- High temperature resistance, so it can be formed by autoclave at temperatures above 200 °C;

- Wide density range, from 29 to 144 kg/cubic meter, to meet different capacity structure requirements;

- It has extremely high shear strength, especially compared to foam core materials, making it more suitable for use in lightweight structures.

- High toughness, high resistance to damage compared to other honeycomb core materials;

Flame retardant, low smoke, low toxicity (Complies with the strictest flame retardant and smoke toxicity standards for aviation);

- Excellent creepage and fatigue performance, can be used for a long time in demanding applications;

- Extremely high moisture strength, can be used in high humidity environments;

- Corrosion resistance (It will not be corroded by moisture or other media in contact with it, nor will it undergo electrochemical reactions with carbon fiber skin like metal honeycomb);

- Outstanding thermal insulation and sound insulation performance, compared to metal and glass fiber materials, it has better thermal insulation and sound insulation performance under the same weight, making it more comfortable, energy-saving, and environmentally friendly.

- Easy to form and process to reduce the production cost. Compared with metal honeycomb, aramid honeycomb can be bent, making processing more convenient and operation more convenient.

Does Aramid honeycomb has disadvantages?

Yes it has, follows are the disadvantages:

1.Poor light resistance

Kevlar paper, as a major component of Kevlar honeycomb, has a significant drawback in terms of light resistance. Under sunlight exposure, the strength of Kevlar paper gradually decreases. This means that in outdoor or applications where it is exposed to light for a long time, Kevlar honeycomb may lose its original performance over time.

2.Appearance defects

During the production process, aramid paper honeycomb may produce some appearance defects, such as double-layer walls, nested holes, S-shaped holes, and herringbone-shaped holes, etc. These defects may affect the overall performance and appearance of the aramid honeycomb. Although the defects can be reduced by improving the production process, it remains a challenge to completely avoid them.

3.Has a lower resistance to compressive force

When the aramid fibers fail, they break into small filaments. This unique failure mechanism is the reason for its high strength and high toughness. However, the resistance of the original fibers to compressive force is different, so aramid fibers are rarely used when pressure resistance is required. This means that aramid honeycomb may not be the best choice when subjected to compressive loads.

Followed are the Performance comparison between aramid honeycomb and traditional materials

Performance dimension	Aramid honeycomb core material	Traditional materials (e.g. aluminium alloy, titanium alloy)	Traditional material honeycomb (e.g., aluminum honeycomb, stainless steel honeycomb)
Light weight	The density is 29-144kg/m3, significantly lower than traditional metal materials.	The density of aluminium alloy is about 2700kg/m3, and the density of titanium alloy is about 4500kg/m3, with a large overall weight.	The density of aluminum honeycomb is about 100-200kg/m3, and the density of stainless steel honeycomb is higher and the overall weight is larger.
strength	The tensile strength is 3 times that of steel, the initial modulus is more than 10 times that of polyamide fiber, and the peel strength is >3.0N/mm.	The tensile strength of aluminium alloy is low, and the strength of titanium alloy is high but heavy.	Aluminum honeycomb has low tensile strength, while stainless steel honeycomb has high strength but heavy weight.
flame retardant	Good flame retardancy, strong corrosion resistance, suitable for harsh environments.	The flame retardancy of aluminium alloy is average, and the corrosion resistance of titanium alloy is good but heavy.	Aluminum honeycomb has general flame retardancy, stainless steel honeycomb has good corrosion resistance but heavy weight.
Insulation performance	Dielectric strength ≥ 100,000 volts/mm, excellent insulation performance.	The insulation performance of aluminium alloy is poor, and the insulation performance of titanium alloy is average.	The insulation performance of aluminum honeycomb is poor, and the insulation performance of stainless steel honeycomb is average.
Rebound	It has high resilience and can effectively absorb impact energy.	The resilience of aluminium alloy is average, and the resilience of titanium alloy is poor.	Aluminum honeycomb has average resilience, while stainless steel honeycomb has poor resilience.
Electromagnetic performance	It has good electromagnetic wave transmission performance and is suitable for components such as radar covers and antenna covers.	The performance of the aluminium alloy is average, and the performance of the titanium alloy is poor.	The performance of aluminum honeycomb is average, and the performance of stainless steel honeycomb is poor.
High temperature stability	Temperature resistance range -196 °C to 220 °C, outstanding high-temperature stability.	Aluminium alloy has a narrow temperature resistance range, and titanium alloy has good high temperature stability but heavy weight.	Aluminum honeycomb has a narrow temperature resistance range, and stainless steel honeycomb has good high temperature stability but heavy weight.
corrosion resistance	It has strong corrosion resistance and can withstand the action of fuel, hydraulic oil, and other media without deterioration.	The corrosion resistance of aluminium alloy is average, and the corrosion resistance of titanium alloy is good but heavy.	The corrosion resistance of aluminum honeycomb is average, and the corrosion resistance of stainless steel honeycomb is better but heavy.
Environmental protection	Low formaldehyde release (≤0.05mg/m3), meeting the requirements of modern industry for environmentally friendly materials.	Aluminium alloy and titanium alloy are generally environmentally friendly, and some traditional materials may contain harmful substances.	Aluminum honeycomb and stainless steel honeycomb are generally environmentally friendly, and some traditional materials may contain harmful substances.

In conclusion, although aramid honeycomb has many advantages such as high strength, light weight, and high temperature resistance, it has some disadvantages in terms of light resistance, appearance defects, and resistance to compressive force. When choosing to use aramid honeycomb, these drawbacks need to be weighed, and the suitability for specific application requirements should be determined. With the continuous development of materials science and technology, there may be new methods to overcome these drawbacks and further improve the performance and applicability of aramid honeycomb in the future.