Increasing the amount of adhesive can improve the adhesive strength, and only the adhesive strength is equal to the separation strength of the original material fiber itself. Too high adhesive strength is often the result of coating too much adhesive on the top of the corrugated board, which will lead to too large bonding surface between the corrugated peak and the surface paper, making the corrugated peak from U-shaped to rectangular, reducing the height of the corrugated board, showing the shape of washboard, resulting in deterioration of other properties of the corrugated board.

　　正常状况下，瓦楞楞峰面上粘胶宽度为1.5mm,多不超越2mm为宜，淀粉粘合剂用量约为10-15g/m2.粘合强度取样规则是取楞长为25mm,宽度为80mm的瓦楞纸板，这就请求在计算粘合强度值时停止数据处置。

　　Under normal conditions, the width of the adhesive on the corrugated peak surface is 1.5mm, which is no more than 2mm. The amount of starch adhesive is about 10-15g / m2. The sampling rule of the adhesive strength is to take the corrugated board with the length of 25mm and the width of 80mm, which requires that the data should be stopped when calculating the adhesive strength value.

　　把80mm宽度中有几个楞算准，同时乘以每个楞的长度值25mm,把它变成被测瓦楞纸板试样所具有的楞的总的长度值。X=L2xQ/L1式中X:-一定长度单位内试样的实践楞数，个LI:-规范规则的不同楞型检验的单位长度（300mm）L2:-试样长度值（80mm）Q:-规范规则单位长度内楞型的数量（个）测试结果，求出算术均匀值，并按下列公式计算出粘合强度。

　　First, calculate several edges in the 80mm width accurately, and multiply the length of each edge by 25mm to change it into the total length of the edge of the tested corrugated board sample. In the formula x = l2xq / L1, X: - the practical number of test pieces in a certain length unit, Li: - the unit length of different test pieces in the standard rules (300 mm) L2: - the value of test piece length (80 mm) Q: - the number of test pieces in the standard rules unit length, the arithmetic uniform value, and the adhesive strength are calculated according to the following formula.

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