1. The size design of the carton is unreasonable
The length, width and height of the carton have a great relationship with the damage of the carton. The size of the carton is usually determined according to the number of bottles to be loaded and the height of the bottles.
The length of the box is the number of bottles in the long direction × the diameter of the bottle, the width of the box is the number of bottles in the width direction × the diameter of the bottle, and the height of the box is basically the height of the bottle. The perimeter of the box is equivalent to the entire side wall supporting the carton compressive load. Generally, the longer the girth, the higher the compressive strength, but this increase is not proportional.
2. The thickness of corrugated cardboard does not meet the requirements
Because the corrugating rollers will be worn during use, the thickness of the corrugated cardboard will not meet the specified requirements, resulting in low compressive strength of the carton, and the strength of the carton will also be reduced.
3. Carton corrugated deformation
Corrugated cardboard itself is soft, has low plane strength and low rigidity, and corrugated cardboard made of this cardboard has low compressive strength and puncture strength. Because the corrugation shape is directly related to the compressive strength of corrugated board. The shape of corrugated is generally divided into U type, V type and UV type. The U shape has good stretchability, high elasticity and high energy absorption.
Within the elastic limit, it can still return to its original shape after the stress is removed, but the planar compressive strength is not high because the point of application of the arc is unstable. V-type has less contact with the paper surface, poor adhesion, and easy to peel off. With the resultant force of two oblique lines, the linear force is good, and the plane compressive strength is relatively large. However, if the external force exceeds the pressure limit it can withstand, the corrugated shape will be destroyed, and the original shape cannot be restored after the pressure is removed. The UV type has the advantages of the above two corrugations, high compressive strength, good elasticity and elastic recovery ability, and is an ideal corrugated type.
4. Unreasonable design of the cardboard layer of the carton
The unreasonable design of the number of cardboard layers will lead to an increase in the damage rate of the outer packaging carton. Therefore, the number of layers of cardboard used in the carton should be considered according to the weight, nature, stacking height, storage and transportation conditions, storage time and other factors of the packaged goods.
5. Poor bonding strength of cartons
To tell if the carton is well bonded, simply peel off the adhesive surface by hand. If it is found that the surface of the original paper is peeled off, it means that the paper is well bonded; if it is powdery, it means that it is false sticking, which will lead to low compressive strength of the carton and affect the strength of the entire carton. The bond strength of the carton is related to the grade of the paper, the preparation of the adhesive, and the manufacturing equipment and process operations.
