Classification of paper:
K paper 260g/m2/200g/m2 two kinds
American paper A paper 175g/m2,(by far the most common), broken ratio (3.5-4.0kg/cm2. G)
B paper 125 g/m2,
Difference: due to base weight (unit :g/m2).8 310g/m2
K paper is the most common market product 7 260g/m2
Taiwan paper A paper is relatively rare = 4 175g/m2 6 200g/m2
B paper
C paper is basically eliminated
Breaking ratio: the basic impact resistance coefficient of the material (unit kg/m2.g);
Cracking strength: (= breaking ratio * base weight) the impact force of cardboard (unit kg/cm2& pounds/In2).
Board:
Three layers are also called single corrugation. Single crater
1> Classify core paper in paper base paper
Five layer surface of paper
A. Shrink (rarely)4.5-5.0mm
Post time: Jun-06-2021