Four layers of corrugated board is always bad adhesion, turned out to be the six details in 'cheating'! ! !
Four layers of corrugated board is always bad adhesion, turned out to be the six details in 'cheating'! ! ! Four layers of corrugated board is always bad adhesion, turned out to be the six details in 'cheating'! ! !
four layers of corrugated board corrugated paper is made up of double corrugated core after gluing composite first, and then the single molding machine, coating machine and double-sided machine dry compound and into. Due to many core with a layer of paper, and also between two layers of corrugated paper core coated with a layer of glue, increase the hardness and thickness of the double corrugated after drying, so than the thickness of the same three the strength of the layer board has more than doubled. Four layers of corrugated cardboard bonding bad problems, how to prevent this kind of problem?
adhesive bad problems to solve four layers of corrugated cardboard, actually can obtain from the following six aspects:
1, the core paper composite, with her picture coating glue can increase core paper much moisture, after drying of glue and to prevent the core make corrugated paper embrittlement, so choose water content, permeability and less easy to uniform coating is suitable for the core paper composite with glue is one of the key.
2, under the premise of meet the compound adhesive strength after, resin coated as far as possible control in uniform but not much.
3, after good composite control core of the paper before entering the corrugated roller humidity can reliable forming, and smooth coating and composite double core three layer of corrugated board. When humidity is too big impact molding, composite degumming caused by dry enough. Humidity is too small will stare blankly pointed embrittlement fracture in bending forming.
4, four layers of corrugated cardboard corrugated stare blankly type should by professional paper roller enterprises according to the two layers of core and the thickness of a layer of glue that is designed to calculate.
5, and vacuum adsorption type single machine processing four layers of corrugated cardboard, attention should be paid to adjust good adsorption system ( Adsorption cover and the position of the corrugated roll, clearance and air volume) And the heating system. Double corrugated core paper requires a higher temperature to transfer heat to stare blankly, meet the gelatinization temperature gum paste. Thickening of the corrugated paper core hardness increases, easy out after molding corrugated roller and affecting the coating and composite, produce high and low stare blankly, stare blankly, degumming collapse and black fungus, and so on quality issues. So shall have sufficient adsorption air and negative pressure and heating temperature can ensure smooth coating composite after ironing forming.
6, equipment, improper operation can lead to bad board adhesive, its mainly embodied in the relationship between speed and quality of cardboard:
the first is the speed of the car, in the process of production speed should be top economic stability of the production line speed adjust the speed for the ideal board. With the strength of the paper and the humidity should be suitable for running speed. Then the speed of the more stable, the layers of paper, the stable humidity control board once adjusted, the quality is more stable. Of course also need heating system stability. Fluctuations in the speed affects the humidity control of the paper, also spread to the quality of the cardboard, eventually lead to bad board adhesive.
epilogue: there are many factors that can influence of the bonding quality problems of corrugated board, as long as the quality of various products phenomenon thorough careful and detailed observations of the analysis, we find the real cause and effect, verify the reason can take the right measures, adjust the first to make sure the train of thought, from the principal contradiction, stability of the terms of a readjustment of other conditions, avoid by all means is clicked, the final will be at a loss.
link: four layers of corrugated board refers to the performance of the two layers of corrugated base paper with special coating adhesive, the adhesive mucus penetration between paper fibers, change the softness of paper, and the two layers of corrugated base paper composite, firmly in the uf together, under the condition of heating rolling ChengLeng, uf surface corrugated board paper again. Four layers of corrugated cardboard possesses the characteristics of high technology content, good performance and is suitable for some packaging for fruits and vegetables and other agricultural products. In Europe and Japan, development and application of the four layers of corrugated cardboard has been quite common, China has just started in recent years. Conversion table packaging printing knowledge