Corrugated Box Quality Control - How to Reduce Customer Complaints Rate (3)

The printing color is not uniform or the paper color is not uniform

Print color samples vary in the supply of different batches, or color samples that do not meet the customer's requirements. In this case, they are generally returned. This requires the strict control of ink hue stability, the best way is to print the first batch of products, the printing of color samples for later printing the same product for verification, so that the printing color uniform.

Due to the different face paper manufacturers of corrugated cartons, there are differences in the color of the face paper. Even if the linerboard of the same manufacturer is different, there are color differences in different batches. This requires strict control of the inspection of raw materials into the factory and archiving of the samples. At the very least, it is necessary to unify the linerboards of the same manufacturer. At the time of production, the same corrugated carton uses the same boxboard paper to keep the color of the face paper uniform.

Corrugated box size is not accurate

The design and manufacture of corrugated boxes is inseparable from the size and size of the corrugated boxes. Corrugated cartons produced have also become waste products. Corrugated carton size is divided into inner diameter size, outer diameter size and processing size. Customers generally have strict requirements for the inner diameter size of corrugated box. Corrugated box inner diameter size must ensure that the contents can be loaded, generally equal to the maximum outer diameter size of the contents plus 3mm ~ 7mm. The outer diameter size is the size used in the circulation. For the export corrugated box, the outer diameter size is very strict, otherwise it will affect the container shipment due to the size. This requires that during the production process, the cardboard size of the production line should be strictly controlled, and the size of the printing slot should be strictly controlled.

Corrugated cardboard creased

Corrugated paperboard creases are mainly caused by the storage and transportation process. This circulation link often fails to attract the attention of the company and lacks quality control. In addition, in the corrugated box production process, the strength of the noodle paper is not enough, the height in the pressure roller is not enough, and the uneven moisture content of the noodle paper can cause the noodle paper to break.

Corrugated box surface warpage will lead to corrugated box folding during stacking, leading to a decrease in corrugated box load-bearing capacity. At the same time, corrugated boxes should be used as short as possible to avoid surface warpage caused by long-term storage of natural air-drying. The appearance of the phenomenon.

Corrugated carton surface is smooth and uneven

Corrugated carton surface is translucent, which affects the overall visual appearance of the corrugated carton, and the hand feel is not smooth, which can not meet the requirement of refined appearance. Mainly due to poor use of facial paper, caused by low grammage, followed by the production process of corrugated board, caused by the improper control of the humidity of the tissue.

Corrugated cardboard box lid tear or incision after sealing

Mainly manifested in the corrugated boxes into a box when the lid incision over the lid folded indentation line or sealing the corner after the phenomenon of empty holes, resulting in increased stress here, easy to make the corrugated box tearing here. During the inspection process, the top of the incision of the corrugated box is strictly controlled at the middle position of the folding indentation line, and the incision and the folding indentation of the box are ensured to be in a straight line.

Corrugated box binding quality does not meet the requirements

The binding quality of corrugated boxes includes the box pitch and the flatness of the bottom surface after binding. The uneven bottom surface after binding will directly affect the uniformity of the box load.

(Li Yutian)

China Packaging News