Three-layer corrugated board introduction
Three-layer corrugated cardboard is the most commonly used corrugated cardboard. This cardboard combines the characteristics of single-layer and double-layer cardboard. It also has sufficient rigidity and good shock absorption performance. It is effectively used to package fragile products and soft Products and hard products that require prevention of surface damage.
use
General packaging, logistics packaging, department store packaging, clothing packaging, clothing packaging, food packaging, wine, beverage packaging, health care packaging, tea packaging, cigarette packaging, cosmetics packaging, pharmaceutical packaging, gift packaging, jewelry packaging, electronic component packaging, Digital packaging, household appliances packaging, toy packaging, hardware accessories packaging.
Strength requirements of corrugated cardboard
1.1: Edge pressure strength: along the corrugated direction, the maximum force that the corrugated board per unit length can withstand before pressure feeding. Unit: N/m.
Edge compression strength = surface base paper comprehensive ring compression strength + comprehensive corrugated paper ring compression strength * shrinkage rate
Generally, the edge pressure calculation is based on the lowest ring pressure strength of the base paper (safe and reliable), and the actual test value will be appropriately greater than the theoretical calculation value.
1.2: Bursting strength: the maximum external force that the corrugated board per unit area can withstand evenly increased before it ruptures. Unit: Kg/cm2.
Cardboard breaking strength = surface paper breaking strength + medium grid paper breaking strength + bottom paper breaking strength
*Due to a certain strength loss during the manufacturing process, the actual test rupture strength will be less than the calculated value by about 1 Kg/cm2.
1.3: Piercing strength: The new national standard GB6544-1999 has cancelled the requirement for cardboard piercing strength.
