Corrugated Boxes Control Technology For Poor Adhesion Of Four-layer Corrugated Board

Corrugated Boxes

 Control Technology for Poor Adhesion of Four-layer Corrugated Board

The corrugation of the four-layer corrugated cardboard has an extra layer of corrugated core paper, and a layer of glue is coated between the two layers of corrugated core paper, which increases the hardness and thickness of the double-layer corrugated core paper after drying, so it is better than the same thickness. The strength of three-layer corrugated cardboard has more than doubled.

　　 1. Four-layer corrugated cardboard bonding points

(1) When the corrugated core paper is laminated, the coating glue will increase the moisture content of the corrugated core paper. After the adhesive dries, it is necessary to prevent the corrugated core paper from embrittlement. Therefore, choose the one with less water content, slow permeability, and easy to coat evenly. Adhesives for corrugated core paper compounding are very critical.

　　(2) Under the premise of meeting the bonding strength after compounding, the amount of glue should be as small as possible.

　　(3) Before corrugating, it is also important to control the humidity of the laminated corrugated core paper. Too much humidity will not only affect the molding, but also cause degumming during compounding; too low humidity will make the corrugated peak brittle and crack when the corrugated is bent.

　　(4) The corrugated shape of the four-layer corrugated board should be specially calculated and designed by the professional roller manufacturer based on the thickness of the two-layer corrugated core paper and one layer of glue to produce the ideal corrugated board.

(5) When processing four-layer corrugated cardboard on a vacuum adsorption single-sided machine, pay attention to adjusting the adsorption system (position, gap and air volume of the adsorption cover and the corrugated roller) and heating system; the composite corrugated core paper has higher requirements Only at the highest temperature can the heat be transferred to Lengfeng and meet the requirements of gelatinization temperature. Thickened corrugated core paper will become harder and will easily break away from the corrugated roller after forming, which will affect the gluing and compounding, resulting in quality problems such as high and low fluting, collapse, degumming and "wood ear edges", so there must be sufficient adsorption air volume And the negative pressure and heating temperature can ensure the smooth coating and compounding of the corrugated cardboard after forming.

　　 2. The relationship between vehicle speed and cardboard quality

　　(1) The ideal adjustment speed should be the most stable and economical speed of the production line.

　　(2) The strength and humidity of the paper should be suitable for the speed of the car.

　　(3) The fluctuation of vehicle speed will affect the humidity control of the paper. The more stable the vehicle speed, the more stable the humidity control of each layer of paper, and the more stable the quality of the cardboard. At this time, a good heating system is very necessary.

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