Boxing Knowledge

Corrugated boxes and single-layer cardboard boxes are widely used packaging materials, available in various sizes and models, differing in the type of material used.

Commonly used cardboard boxes are 3-ply and 5-ply, with 7-ply used less frequently. The layers include inside paper, corrugated paper, core paper, and surface paper. The inside and surface papers can be tea board paper or kraft paper, with the core paper made of corrugated paper. The colors and textures of different types of paper vary, and the paper produced by different manufacturers also differs in color and texture.

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

Corrugated boards made from different wave shapes have varying functionalities. Even with the same quality of face and back papers, the performance of the corrugated board can differ due to the variation in wave shapes. The internationally recognized corrugated wave shapes are divided into four types: A-wave, C-wave, B-wave, and E-wave. Their technical specifications and requirements are listed in Table 1. A-wave corrugated boards offer good cushioning and elasticity, with C-wave being slightly less than A-wave. However, they have better rigidity and shock resistance than A-wave. B-wave corrugated boards have a higher density, resulting in a flat surface and high bearing capacity, making them suitable for printing. E-wave corrugated boards, due to their thinness and density, exhibit greater stiffness.

Corrugated cardboard material

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

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: Typically 100g/m²

Large Machine 105-110 g/m²

Enhanced Core Paper: +115g/m²