Aluminum foil for honeycomb core

Aluminum foil for honeycomb core

Aluminum foil for honeycomb core is also called honeycomb aluminum foil, which is the main raw material for making honeycomb core.

Honeycomb core is the main material for making honeycomb board, which is mainly made of honeycomb aluminum foil. The requirements for aluminum foil for honeycomb core are very high. This article mainly tells you about aluminum foil for honeycomb core.

Aluminum honeycomb core

Alloys of aluminum foil for honeycomb core

Aluminum foil for honeycomb core usually adopts a specific aluminum alloy series to ensure that its performance meets the requirements. Common alloys include:

3003 aluminum foil: This is a widely used alloy that is selected as honeycomb core material due to its good formability, corrosion resistance and moderate strength. 3003 aluminum foil is suitable for manufacturing honeycomb cores. Its thickness range is roughly between 0.02~0.06mm, and its side length models are diverse, such as 5mm, 6mm, etc.

5052 aluminum foil: Although the cost is relatively high, 5052 alloy is also used in the production of high-end aluminum honeycomb cores due to its better corrosion resistance and moderate strength. This alloy is suitable for application scenarios that require higher performance.

3004 aluminum foil: Similar to 3003, 3004 aluminum foil is also commonly used in honeycomb cores. It may have some optimizations in certain properties, such as better corrosion resistance and processing, while also maintaining cost-effectiveness.

Aluminum foil for honeycomb core

Requirements for aluminum foil for honeycomb core

Alloys: Common alloys include 3003, 5052 and 3004, among which 3003 aluminum foil is the most commonly used because of its good formability, corrosion resistance and suitable cost-effectiveness. These alloys ensure the strength, durability and corrosion resistance of the honeycomb core.

Thickness: The thickness of aluminum foil is generally between 0.02mm and 0.06mm, and the specific thickness is determined according to application requirements and design specifications. Thinner aluminum foil can reduce weight, while thicker aluminum foil can provide higher mechanical strength.

Cell size: The side length of the honeycomb core is diverse, and common specifications include 5mm, 6mm, 8mm, 10mm, 12mm, etc. Different cell sizes will affect the density and mechanical properties of the honeycomb core, so as to adapt to different use conditions and load requirements.

Surface treatment: The surface of the aluminum foil should be smooth and burr-free, and some need to be attached with laser micropores to help balance the air pressure inside the honeycomb panel to avoid deformation or damage caused by internal pressure difference during processing and use.

Node strength: The node strength of the honeycomb core is crucial and should be ≥2.0N/mm to ensure the stability and load-bearing capacity of the overall structure. This requires the node glue to have high strength and resistance to environmental changes.

Adhesive: Node glue usually uses epoxy-modified high-temperature curing glue. This type of adhesive can provide sufficient bonding strength and has excellent environmental resistance and high and low temperature resistance to prevent the honeycomb core from debonding under extreme conditions.

Weather resistance: If used in outdoor environments such as exterior wall decoration, the selected materials and coatings (such as fluorocarbon resin coatings) must have excellent weather resistance, and the coating thickness should meet certain standards, such as fluorocarbon roller coating treatment The film thickness is at least 25μm to ensure long-term durability and beauty.

Structure of Honeycomb Aluminum Panel

The upper and lower base plates and panels of the aluminum honeycomb panel are aluminum alloy plates, with a thick and light honeycomb core sandwiched in the middle. The panels and the core are bonded together by adhesive to form an integral rigid structure. The panel surface treatment can be fluorocarbon, roller coating, thermal transfer, brushing, oxidation; the aluminum honeycomb panel can also be bonded with fireproof board, stone, and ceramic. The upper and lower base plates and panels of the aluminum honeycomb panel are mainly made of high-quality 3003-H24 or 5052-H14 alloy aluminum plates, and the thickness of the aluminum plate is between 0.4mm-3.0mm.

Honeycomb panel structure

Aluminum honeycomb core market applications

building curtain walls, interior decoration, locomotive honeycomb panels, ship honeycomb cores, clean panels, solar thermal back panels, printing table panels, automobile collision test collision walls

Advantages of aluminum honeycomb composite materials

• (1) Light weight
• (2) Impact resistance
• (3) High rigidity
• (4) Good flatness
• (5) Good sound insulation and heat insulation

Advantages of 3004 honeycomb aluminum foil substrate

3004 honeycomb aluminum foil substrate has good plate shape, high flatness, flat end surface, and no burrs on the edge. It has high strength and is not easy to deform after processing. Moreover, the surface of the aluminum foil is cleanly degreased and the adhesive is not easy to fall off.

More importantly, 3004 honeycomb aluminum foil has a high cost-effectiveness and is currently an ideal material for making honeycomb materials.

Common problems with aluminum foil for honeycomb core

1. The surface of the aluminum foil cannot be effectively bonded

Reasons:

1.1 There is rolling oil residue on the surface of the finished aluminum foil after rolling.

1.2 The passivation effect is not good, resulting in the aluminum foil surface not being rough enough to effectively bond the adhesive.

2. The end faces of the large roll of aluminum foil are uneven

Reason: Uneven tension during winding leads to uneven winding and layer-by-layer phenomenon

More information: https://aludepot.com/blog/honeycomb-aluminum-foil-common-problems/