The characteristics of corrugated cardboard partial collapse:
First, the collapsed area varies greatly. In every square meter, the collapsed area is as few as a few square centimeters and as much as thousands of square centimeters;
The second is that the corrugation has periodicity. Along with the production direction of the single-sided machine, the corrugated cardboard appears periodic but not exactly the same.
The third is that the area of ​​the collapsed corrugation is large and small in the middle of the horizontal direction of the corrugation, and the collapse of the corrugated shape is irregular;
Fourthly, there is obvious degumming in the collapsed area, and the local thickness of the corrugated cardboard has been significantly reduced, and some are only 30% of the Xiangqing standard thickness.
In mass production, the existence of such local collapse defects will affect the quality of the product, resulting in a large number of secondary waste products, resulting in a substantial increase in manufacturing costs, and the company is deeply affected. Such three-layer, five-layer or seven-layer corrugated cardboard will inevitably produce a total degumming area greater than the national standard 20cm2 / m2, the edge pressure strength is greatly reduced, the thickness of the cardboard is lower than the national village, the printed pattern is plaque and the text is blurred Inferior waste products seriously affect the overall quality of carton products.
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