Boxing Knowledge
Cardboard boxes are widely used packaging products. They come in various types based on the material used, such as corrugated boxes and single-layer cardboard boxes, with a range of sizes and models.
Corrugated boxes are commonly available in 3-ply, 5-ply, with 7-ply used less frequently. The layers consist of inside paper, corrugated paper, fluting paper, and outer paper. The inside and outer papers can be kraft paper or brown kraft paper, the fluting paper is used for the core, and the colors and textures of various papers differ. Similarly, the color and texture of paper produced by different manufacturers also vary.
Corrugated cardboard is made by bonding together face paper, back paper, fluting paper, and corrugated paper that has been processed into a wavy fluting. According to the requirements of product packaging, corrugated cardboard can be processed into single-face, three-layer, five-layer, seven-layer, eleven-layer, and other types of corrugated cardboard.
Corrugated paperboards made from different wavy shapes have varying functionalities, even when using the same quality of face and back papers. Due to the differences in the corrugation shape, the performance of the formed paperboard also varies. 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 paperboard offers good shock absorbency and elasticity; C-Flute is slightly less than A-Flute, but has better rigidity and impact resistance. B-Flute has a higher density and produces a smooth surface, with high compressive strength, suitable for printing. E-Flute, being thin and dense, exhibits greater stiffness and strength.
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: Typically 100g/m²
Large Machine 105-110 g/m²
Enhanced Core Paper: +Paper 115g/m²
