Method and apparatus for producing board and a board product
A product and cardboard technology, applied in paper/cardboard layered products, layered products, chemical instruments and methods, etc., can solve the problems of high investment cost, clumsy, expensive corrugated cardboard production lines, etc., to achieve high production cost-effectiveness ratio, High strength and bending resistance, large volume effect
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[0018] The example shown in the figure is suitable for the manufacture of three-layer products. To produce such a three-layer product, three coils 4 , 5 , 6 are required, which are fed into the process as coils 1 , 2 , 3 . As this process requires, rolls are paid out from the material rolls 1, 2, 3 and enter a bonding / sizing nip 7 formed between two opposing rolls. The rolls are glued together in the nip 7 . First, the interlayer roll 5 is passed through the nip of an embossing roll 8 which embosses a raised pattern thereon by embossing the web 5 in a dry state, thereby permanently deforming the web surface. In this context dry rolls have to be understood as having the normal moisture content of rolls being paid out from storage rolls or processing rolls 2, ie the moisture content of the delivered coils, generally less than 10% and usually 3%-12%. Additionally, the embossing operation is performed without subjecting the web to heat or steam. Most advantageously, the roll su...
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