How to ensure the adhesive strength of corrugated board
1. The classification is not the same: domestic cardboard paper is divided into three grades: high-quality, first-class, and qualified. Corrugated paper is generally divided into two types: single corrugated cardboard and double corrugated cardboard, which are divided into five types according to the corrugated size: A, B, C, E, and F. 2. The purpose is…





















