CORRUGATED CARDBOARD

The flutes in corrugated cardboard refer to the type and size of the waves located between the layers of paper. These waves impact the cardboard’s properties, such as strength, rigidity, and shock-absorbing capacity. There are different types of flutes, labeled with letters, which define their height and density:

Types of flutes in corrugated cardboard:

• Type A:

  • Wave height: 4.5 – 4.7 mm
  • Use: Best for shock absorption and protection, used for making boxes that require high durability.

• Type B:

  • Wave height: 2.5 – 3.0 mm
  • Use: Resistant to punctures, suitable for smaller packages and products requiring good mechanical protection.

• Type C:

  • Wave height: 3.5 – 4.0 mm
  • Use: A versatile flute, combining shock absorption and puncture resistance, most commonly used in standard cartons.

• Type E (Micro flute):

  • Wave height: 1.1 – 1.5 mm
  • Use: Very thin flute used for small packaging, ideal for prints and aesthetically pleasing packaging for premium products.

• Type F:

  • Wave height: 0.8 – 1.0 mm
  • Use: Even thinner than Type E, used for lightweight packaging and high-quality visual packaging production.

• Type G:

  • Wave height: 0.5 – 0.8 mm
  • Use: The thinnest flute, used for packaging delicate products such as electronics.

Corrugated cardboard, although primarily associated with packaging, is also used in construction. Due to its lightness, strength, and eco-friendliness, it is utilized in various areas, such as:

• Protecting surfaces during construction work (floors, walls, windows, doors)
• As temporary formwork (creating molds for concreting, reinforcing lightweight structures)
• For thermal and acoustic insulation
• For temporary lightweight structures (partition walls, architectural models)
• For protecting products, tools, and machinery during storage and transportation.

The product should be packaged with the smooth side of the corrugated cardboard facing inward, towards the product. The smooth layer on the inside minimizes the risk of scratching or damaging delicate surfaces, such as glass, ceramics, or electronics, and adheres better to the product, which further stabilizes the contents.

The corrugated structure should be facing outward to absorb shocks and impacts, providing better protection against external factors. This also increases the rigidity and strength of the packaging, ensuring resistance to crushing during transport.

Yes, corrugated cardboard is suitable for floor protection and is commonly used for this purpose during construction, renovation, or painting work. It protects the floor from dirt and mechanical damage, and also provides a cushioning layer for shocks and vibrations. It is also eco-friendly and more cost-effective than many alternative solutions, such as rubber mats.

Flute markings in corrugated cardboard refer to the type and size of the flutes in the cardboard structure, which affect its strength, cushioning, and applications. Letters such as A, B, C, E, F, etc., refer to the height and density of the flute in the corrugated cardboard.

• Flute A

  • Height: 4.5 – 4.7 mm
  • Best for cushioning, but less resistant to crushing.

• Flute B

  • Height: 2.5 – 3.0 mm
  • Resistant to crushing and punctures, with less cushioning.

• Flute C

  • Height: 3.5 – 4.0 mm
  • Versatile properties, a compromise between cushioning and crush resistance.

• Flute E

  • Height: 1.1 – 1.5 mm
  • Thin flute, good rigidity and crush resistance, but less cushioning.

• Flute F (Microflute)

  • Height: 0.8 – 1.0 mm
  • Very thin, lightweight, used for small, high-quality aesthetic packaging.

Corrugated cardboard is a versatile material used in many industries. It is resistant to crushing, provides cushioning, is lightweight, eco-friendly, offers thermal and acoustic insulation, has an aesthetic appearance, and is easily available.

To protect delicate products, choose flutes with a greater height (e.g., A, C), which provide good cushioning. For heavy loads, combinations of flutes (e.g., BC) with high mechanical strength are appropriate. To enhance the aesthetics of packaging, opt for thin flutes (e.g., E, F) that are suitable for printing.