subject: Analysis: Corrugated Cardboard Printing Controls Burst Line - Corrugated Board, Corrugated - Paper [print this page] Keeping Corrugated paper Board moisture content is controlled Cardboard The best way to blast line. Out from the tile line Corrugated Board moisture content is from 12% to 18% and more reasonable, Print When the moisture content should be maintained at 10% to 13%. Due to some objective conditions, people tend to think that control of water is not easy. In this, to tell you a few more effective ways to:
First, corrugated cardboard processing adjustments to the traditional approach is to have a certain effect. Usually we can take the following approach to control: pulp and paste the formula to adjust when appropriate, increase the paste's water content. Increase the amount of paste volume. Have proved adequate to increase the paste volume can improve the board's moisture content, increase the paste volume can also enhance the bonding effect to some extent. Base paper and preheat the appropriate wheel to reduce the contact area, in order to avoid excessive water evaporation in the preheat tank on. Reduce the board's residence time in the hot plate. By maintaining a higher speed, reducing the length of hot plate, hot plate to reduce the vapor pressure and other measures to avoid board in the water through the hot plate too much evaporation. Use this method must be taken to ensure that board does not go pit.
Secondly, on the cardboard out from the tile line to the machine print this period the variation of water caused by a lack of awareness is an important reason for blasting line. Cardboard from the tile line out, although the overall relatively high water content, but the moisture content of each layer of paper is extremely uneven. Tests show that the dry weather season, cardboard production line just came out of tissue paper cardboard moisture content of about 8%, some even less than 6%, when the cardboard stacked four hours later, the water levels tend to balance paper, tissue paper water to more than 9%. Therefore, if the board that just came out of tile lines printed on the machine, because only very low water content tissues at this time, easily lead to pressure line bit burst. So, after the board produced sufficient time should be stacked until the layers of paper and then on the water balance machine printing. Cardboard surface, where the printing paper that is low water pressure line, pressure line will produce micro-cracking site, then even if the surface water increases in paper, the problem can not avoid the blast line.
If the customer delivery time too short to have sufficient time to board the water balance, to the wet surface of the water board is the most direct and most effective way. Wet water is best to avoid affecting the printing area, or would adversely affect to print. If conditions permit, can be produced using waste-site version of a wet version of the first printing station with a wet area on the water pressure line, and then for printing. That would be fast on the press line bit wet, do not affect print quality.
When the moisture content can not be improved through the control board burst, the use of leather and better folding Cardboard Can effectively reduce Carton The burst level, currently no reliable test showed that the problem can be completely avoided burst line. With test data show that tissue paper, and in 100% of the original paper Wood pulp Cattle Cardboard The board, its moisture content as low as 6%, the burst phenomenon will occur. Folding properties of base paper is usually good or bad from the longitudinal tear in the paper and physical properties of bursting 2 reflects a certain degree, vertical tear and burst high in the base paper, the folding properties of a corresponding the higher.
In the configuration when the paper, unless there are special requirements, we should try to reduce the surface differences in paper weight. For example, we should try to avoid the production of K = B, K = C board, as this paper easily lead to B or C paper burst. In fact, the vast majority of corrugated board processing factories are not producing K = B, K = C a class of corrugated board, we can see that this principle has long been recognized and followed peers. If due to objective reasons have to use this configuration, then the best approach is to weight the lower layer of paper that use long-fiber kraft Paperboard .
For different strength of corrugated board, paper at the time with the opposite, in matching paper should be treated differently. The compression strength of the cardboard or carton Carton requires the higher compressive strength, surface should be used in paper folding paper more matches.
For A, BA, BCA, etc. A pit with corrugated sheet-shaped composition, selective use of folding base paper with good fit with A corrugated, paperboard can also be effective in preventing blast line.
Board in slot pressure line should pay attention to adjust embossing rollers under pressure line position, pressing line on slot slight deviations have occurred in time to adjust. Appropriate efforts to reduce the pressure line can improve the burst line, but this approach may result in adverse carton forming.
If conditions allow, can increase the printing pressure, the pressure of dry hard cardboard appropriate software, will reduce the burst line. However, this approach would greatly reduce the carton of the compressive strength, therefore, not misuse.
