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1. What Are Seven-Layer Carton Boxes?

Seven-layer carton boxes are a type of corrugated packaging manufactured from carton paper with a premium structure comprising up to seven stacked layers. These layers may utilize identical or different corrugation profiles depending on box design requirements. The structure includes two flat outer linerboards on both exterior faces and five internal corrugated layers with various flute types such as A, B, E, C, etc., offering high versatility.

The basic structure of seven-layer carton boxes is as follows:

• Outer linerboard layer: This is a high-grade paper layer with superior design quality. It can be printed or processed according to requirements to enhance aesthetics and brand identity. The surface is typically flat and smooth.
  

• Middle layers (also known as corrugated layers): These consist of three corrugated mediums, which may be identical or different depending on design specifications, quality requirements, and pricing of seven-layer carton boxes. These corrugated layers are interleaved with two flat paper liners the flute crests are bonded to the outer liner and the bottom liner.
  

• Bottom liner layer: This is the innermost paper layer of the box, usually ed with lower-grade material, grammage, and color to reduce overall cost, or in some cases made from the same material as the outer liner.

2. Types of Seven-Layer Carton Boxes

✿Seven-layer carton boxes with ABC flutes 

Seven-layer carton boxes with ABC flutes consist of three corrugated layers: A, B, and C. The A flute is positioned on the outer side, followed by the B flute, and finally the C flute near the bottom of the box. This premium ABC flute structure fully integrates the properties and characteristics of each corrugated layer.

✿Seven-layer carton boxes with AEB flutes

Seven-layer carton boxes with AEB flutes consist of three corrugated layers: A, E, and B. The A flute is positioned on the outer side, followed by the E flute, and finally the B flute near the bottom. This premium AEB flute structure fully retains the functional characteristics of its constituent flutes.

✿Seven-layer carton boxes with BCE flutes

Seven-layer carton boxes with BCE flutes consist of three corrugated layers: B, C, and E. The B flute is positioned on the outer side, followed by the C flute, and finally the E flute near the bottom. This cost-effective yet high-quality BCE flute structure provides full performance characteristics of its corrugated layers.

3. Advantages of Seven-Layer Carton Boxes

A distinctive feature of seven-layer carton boxes is that both inner and outer layers are designed to be significantly stronger than five-layer cartons. These boxes offer the following advantages:

• Seven-layer carton boxes are of moderate weight, helping reduce costs compared to wooden or plastic packaging. They also allow for better control and organization of goods during handling and operations.
  

• Large dimensions with high impact resistance, suitable for long-distance transportation and for packaging sensitive items and electronic equipment.
  

• Extremely robust structure with superior load-bearing capacity, high burst strength, and excellent shock resistance, making them ideal for heavy goods and high-value export products requiring multiple handling stages over extended transport periods.
  

• Capable of ensuring long-term protective performance.
  

• Manufactured from quality seven-layer carton materials that help reduce environmental pollution.
  

• Seven-layer carton boxes are reusable.
  

• Easily combined with other packaging materials.
  

• Excellent surface adhesion for various printing inks.

4. Applications of Seven-Layer Carton Boxes

Seven-layer carton boxes are most commonly used in packaging and transportation of high-value, fragile, and bulky goods. They are especially suitable for electronic products, heavy machinery, and items requiring high burst strength and exceptional load resistance.
Specifically, when used for export packaging, seven-layer carton boxes are ideal for packing, storing, warehousing, and transporting export fruits such as dragon fruit, mangoes, etc., helping prevent bruising and damage.

Hai Dang Long An Production Company is currently one of the leading manufacturers of seven-layer carton boxes and large-volume seven-layer carton printing services at the most competitive prices in the market. We specialize in customized seven-layer carton box production, structural design, and high-quality printing, ensuring durability and refined appearance.

If you are planning to order carton boxes and are unsure which design best suits your needs, please contact us for immediate consultation and professional advice.