The surface smoothness of corrugated board is poor, which can be roughly divided into horizontal arch, longitudinal arch and arbitrary arch.

水平拱是指沿波浪方向形成的拱?？v向拱是指紙板沿生產線速度方向形成的拱。任意拱是指在任何方向上起伏的拱。表面起拱稱為正拱，表面起拱稱為負拱，表面起伏稱為正拱和負拱。

Horizontal arch refers to the arch formed along the wave direction. Longitudinal arch refers to the arch formed by the paperboard along the speed direction of the production line. An arbitrary arch is an arch that fluctuates in any direction. Surface arching is called positive arch, surface arching is called negative arch, and surface fluctuation is called positive arch and negative arch.

影響紙板平整度的主要原因

Main factors affecting the flatness of paperboard

1、紙張類型和等級不同。貴陽紙箱包裝有進口、國產牛皮紙、仿牛皮紙、瓦楞紙、茶葉板紙、高強瓦楞紙等，也分為A、B、C、D、E、級。由于紙張質量差，所以面紙比襯紙好。

1. Different paper types and grades. Guiyang carton packaging includes imported and domestic kraft paper, imitation kraft paper, corrugated paper, tea board paper, high-strength corrugated paper, etc., which are also divided into grades A, B, C, D, e and E. Because of the poor quality of paper, face paper is better than backing paper.

2、襯紙的主要技術參數不同?？紤]到紙箱的性能要求或用戶的成本降低，要求紙箱內的紙張不同。通常：

2. The main technical parameters of backing paper are different. Considering the performance requirements of cartons or the cost reduction of users, the paper in cartons is required to be different. Usually:

面粉中有不同數量的紙。面紙比襯紙大，但也小。襯紙的含水量不同。由于供應商和運輸庫存的濕度不同，面紙的含水量比襯紙高，而且也較小。紙張內部的數量和含水量不同。首先，面紙的數量大于襯紙，含水量大于襯紙或小于襯紙。二是面紙的數量小于襯紙，含水率大于襯紙或小于襯紙。

There are different amounts of paper in the flour. The face paper is larger than the backing paper, but it is also smaller. The moisture content of the backing paper is different. The moisture content of liners is lower than that of liners in transportation, and the moisture content of liners is also higher than that of liners in transportation. The quantity and moisture content inside the paper are different. First, the quantity of face paper is greater than the backing paper, and the water content is greater than or less than the backing paper. Second, the quantity of face paper is less than the backing paper, and the moisture content is greater than or less than the backing paper.

3、同一批紙的含水量不同。一部分紙的含水量高于另一部分紙或貴州紙箱包裝的含水量。外緣和內芯含水量不同。

3. The moisture content of the same batch of paper is different. The moisture content of one part of paper is higher than that of another part of paper or Guizhou carton packaging. The water content of outer edge and inner core is different.

4、紙加熱器受熱面長度不能任意調整。前者操作不當，后者受設備限制，影響預熱干燥效果。

4. The length of heating surface of paper heater cannot be adjusted arbitrarily. The former is not operated properly, and the latter is limited by the equipment, which affects the preheating and drying effect.

5、不可能使用蒸汽噴射裝置或設備，沒有噴霧裝置，從而不能任意增加紙張的濕度。

5. It is impossible to use steam ejector or equipment without spraying device, so that humidity of paper can not be increased arbitrarily.

6、預熱后，紙張發出的水分時間不足或環境濕度高，通風不良，生產線速度不當。

6. After preheating, the paper emits insufficient moisture time or high environmental humidity, poor ventilation and improper production line speed.

7、紙板的不均勻收縮是由于單面瓦楞機和涂膠機裝膠不當、不均勻造成的。

7. The uneven shrinkage of paperboard is caused by improper and uneven glue loading of single-sided corrugating machine and gluing machine.

8、蒸汽壓力不足、不穩定、存水彎等零部件損壞、管道內不排水等導致預熱器不能正常穩定工作。

8. Insufficient and unstable steam pressure, damage of trap and other parts, and non drainage in the pipeline lead to the failure of the preheater to work normally and stably.

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