Study on Easy-open Corrugated Box Corrugated Strip

At present, the domestic corrugated box easy opening technology is mainly realized by presetting the tearing hole, the half tangential line, the tearing perforation line, etc., and when the Corrugated Line Glue Machine opening is broken, the corrugated box is broken along the preset tearing or tearing line, and the opening can be realized. Features. However, in the actual production and transportation process, these structures will affect the mechanical properties and printing aesthetics of the corrugated box. How to ensure that the corrugated box has good mechanical properties and printing integrity, and can achieve fast opening function?

Determination of fiber usage

According to the distribution of the pulling force of the human body in the standing straight arm, the maximum pulling force that can be spent when the human arm is in the horizontal position is at least 10% of the body weight. If the tearing strip is cut, the maximum tearing force generated by the corrugated cardboard is less than the human body expenditure. Pulling, then the consumer can easily open the corrugated box. According to estimates, when the human body is standing, the Glue Application Machine average pulling force of the female's one-handed horizontal posture is 87N, and the average pulling force of the male one-handed horizontal posture is 111.5N. Therefore, the maximum tearing force of the tearing strip is 87~111.5N.

Determination of the amount of glue applied

The amount of the adhesive applied is mainly adjusted by controlling the coating thickness of the adhesive. The samples of the above three kinds of fibers were respectively coated with an adhesive coating layer having thicknesses of 0.14 mm, 0.18 mm, 0.22 mm, and 0.24 mm, and then the tearing properties were respectively tested on the tear tape. The Glue Applying Machine test results are divided into three grades: good, the tear strip fiber is completely impregnated with the adhesive, the tear strip is good and can be curled; in general, the tear strip fiber can be completely impregnated with the adhesive, but the tear The strip stiffness is too soft or too hard; poor, the tear strip fiber is not completely impregnated with the adhesive, and the tear strip is less stiff. The results of this experiment are shown in the figure.

in conclusion

In terms of cost, the sample with less fiber consumption, good bonding effect and good tearing property is the final choice. In general, sample 1 is a good choice for meeting various requirements. The amount of the fiber of the sample 1 (0.2 g) was converted to obtain a fiber amount of 1800 to 2700 pieces/cm. At the same time, the amount of acrylate pressure-sensitive adhesive is 150g/m2; the width of the tearing strip is 25mm, the tensile strength is 1.2kN/m, and the elongation at break is 14.3%. material.

　　 The above content is selected from the first issue of 2011, Printing and Printing , Packaging and Decoration, and more journal content. Please pay attention to the journal channel.