Boxing Knowledge
Corrugated boxes and single-layer cardboard boxes are widely used packaging materials, available in various sizes and models according to different materials.
Corrugated boxes commonly come in three, five, and less frequently, seven layers. The layers include inner paper, corrugated paper, fluting paper, and surface paper. The inner and surface papers can be tea board paper or kraft paper, while the fluting paper is used for the core. The color and texture of various papers differ, and so do the papers produced by different manufacturers (in terms of color and texture).
Corrugated cardboard is made by bonding 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.
Wavy corrugations of different shapes result in corrugated board with varying functions. Even with the same quality of face and back papers, the performance of the corrugated board varies due to the differences in 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 a certain degree of elasticity, with C-flute being slightly inferior. However, it has better rigidity and impact resistance than A-flute. B-flute has a higher density, resulting in a flat surface and high compressive strength, suitable for printing. E-flute, being thin and dense, exhibits its stiffness and strength more prominently.
Corrugated cardboard material
Board Material Classification: Board materials are categorized by their weight per unit area, with the following main 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 105-110g/m²
Enhanced Core Paper: +Paper 115g/m²
