Boxing Knowledge

Corrugated boxes are widely used packaging materials, available in various types depending on the material, such as corrugated boxes and single-layer cardboard boxes, with a range of sizes and models.

Corrugated boxes are commonly available in 3, 5, and less frequently in 7 layers. The layers include inner paper, corrugated paper, core paper, and outer paper. The inner and outer papers can be kraft paper or brown paper, while the core paper is made of corrugated paper. The colors and textures of various papers differ, as do those produced by different manufacturers (color and texture).

Corrugated cardboard is made by bonding together face paper, back paper, fluting paper, and corrugated paper that has been processed into wave shapes. Depending on the requirements for product packaging, corrugated cardboard can be processed into single-faced, three-ply, five-ply, seven-ply, eleven-ply, and other types of corrugated cardboard.

Corrugated cardboard made from different wavy shapes exhibits varying functionalities. Even with the same quality of face and back papers, the performance of the corrugated board can differ due to the variations in the corrugation shape. The internationally recognized corrugation shapes are divided into four types: A-flute, C-flute, B-flute, and E-flute. Their technical specifications and requirements are listed in Table 1. A-flute corrugated board has good cushioning properties and elasticity, with C-flute being slightly less than A-flute. However, it has better stiffness and impact resistance than A-flute. B-flute has a higher density, resulting in a flat surface and high bearing capacity, making it suitable for printing. E-flute, due to its thinness and density, showcases greater rigidity.

Corrugated cardboard material

Board Material Classification: Board materials are categorized by their weight per unit area, and mainly include the following types of board materials:

K Paper: 250g/m²

A Paper: 175g/m²

B Paper: 125g/m²

7 Sheets: 200g/m²

8 Sheets: 260g/m²

C Paper: 127g/m²

Core Paper: Basic 100g/m²

Large Machine 105-110g/m²

Enhanced Core Paper: +Paper 115g/m²