【Carton knowledge】 Corrugated and corrugated shapes of corrugated cardboard
1. Corrugated cardboard
Corrugated cardboard with different corrugated shapes has different functions. Even when using the same quality facial paper and backing paper, due to the difference in the corrugated shape, the performance of the corrugated cardboard is also somewhat different. At present, there are four kinds of corrugated corrugated shapes in the world, they are a-shaped flute, c-shaped flute, b-shaped flute and e-shaped flute. See Table 1 for their technical indicators and requirements.
Corrugated paperboard made of a-type corrugated board has better cushioning and has a certain degree of elasticity, and c-shaped corrugated board is second to a-shaped corrugated board. But the stiffness and impact resistance are better than that of a-type corrugation; b-type corrugated board has a large arrangement density, the surface of the corrugated cardboard made is flat, and the bearing pressure is high, which is suitable for printing; e-shaped corrugation shows its rigidity because it is thin and dense strength.
2. Corrugated wave shape
The corrugated shape of corrugated corrugated paper constituting corrugated cardboard is divided into v-shape, u-shape and uv-shape. The characteristics of the V-shaped corrugated waveform are: high plane anti-pressure value, saving the amount of adhesive in use and saving corrugated base paper. However, the corrugated cardboard made of corrugated corrugated paper has poor cushioning properties, and the corrugated cardboard is not easy to recover after being compressed or impacted. The characteristics of the U-shaped corrugated waveform are: large adhesive area, firm adhesion, and certain elasticity. When it is impacted by external force, it is not as fragile as the V-shaped flute, but the plane expansion pressure strength is not as good as the V-shaped flute.
According to the performance characteristics of V-shaped flute and U-shaped flute, the U-shaped corrugated roll made by combining the advantages of the two has been widely used. The processed corrugated corrugated paper not only maintains the high pressure resistance of the V-shaped corrugated paper, but also has the characteristics of high U-shaped corrugated adhesive strength and certain elasticity. At present, the corrugated rolls of corrugated board production lines at home and abroad use this type of corrugated corrugated roll.