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As the autumn and winter seasons approach, the explosion-proof line guide for cardboard, paper boxes and color boxes is released.
It is now the golden autumn season, with dry and hot weather. Based on the production experience of the industry over the years and considering the characteristics of the paperboard in this environment, in order to adapt to the seasonal climate changes and avoid unnecessary troubles and losses to the production of cartons, paper boxes and color boxes due to the changes in temperature and humidity of the external environment, our company will work together with your company to take measures to prevent the problem of paper box wire bursting.
Regarding the raw materials: From October to March of the following year, the company will appropriately adjust the production process and raw material ratio of the raw materials, and moderately increase the internal control indicators such as folding resistance, moisture content, and burst resistance. Additionally, from the perspective of paper properties, for the production of paper boards, paper boxes, and color boxes, we would like to give your company the following
I. Paperboard Production:
When producing cardboard, please ensure that the pre-heating cylinder temperature, the angle of wrapping, and the temperature of the hot plate are adjusted according to the moisture content of the base paper. This is to prevent the loss of excessive moisture from the base paper, which could affect the physical properties and appearance of the cardboard boxes.
2. Before the liner paper enters the single roll machine, before the face paper enters the heating plate, and before the corrugating process of the paperboard, a steam spray system can be added to increase the moisture content of the paperboard. It is recommended that the moisture content of the paperboard be controlled at 10% - 12%.
3. Reasonably adjust the paste formula and reduce the amount of borax added.
4. Appropriately adjust the accuracy of the presser wheel and the depth of its function.
II. In terms of paper box production, the most common issue is that there is a tendency for the cutting and stitching areas to crack. Suggested measures are as follows:
The depth of the slot can be determined according to the actual situation. Generally, a depth of 3-5mm can be set. At the same time, the width of the slot can be adjusted according to the size and shape of the carton, which can effectively prevent the occurrence of cracking when the slot is made.
2. If using a combined printing and slotting equipment for production, a pre-pressing method can be adopted to prematurely weaken the corrugated strength at the wire-pressing area, control the pressure of the slotting machine, and pay attention to keeping the wire-pressing paper feed wheel and the slotting knife edge in a straight line.
3. When using a die-cutting machine for die-cutting and slotting, while controlling the die-cutting pressure, it is advisable to consider adding a pressure line or a rubber pad on the edge of the die-cutting blade to extend the buffering time and the time during which the die-cutting edge directly contacts the paperboard. It is also preferable to use a wide-edge die-cutting edge line cutter.
III. Production of Color Boxes:
The whiteboard paper should be stored indoors. After opening the package, the exposure time should be shortened. It should be placed in the printing workshop 24 hours before printing to allow the temperature and humidity in the workshop to reach a balanced state. The workshop temperature should be maintained at 15-20℃, and the humidity should be controlled at 50%-60%. After printing, it should be immediately wrapped with PE film. When pressing the lines of the color box, please use the appropriate creasing strips for reverse line pressing to ensure that the folded lines form an arc shape.
IV. Other measures:
Due to the influence of weather humidity, it is recommended that the production of double-sided machine paperboard be completed with the subsequent processes within 24 hours. If this cannot be achieved within the time frame and the paperboard is prone to cracking, it is suggested to carry out humidity adjustment in the workshop. For example, installing a humidifier in the paperboard storage area or sprinkling water around the paperboard to increase the humidity in the air.
2. Considering the significant differences in climate conditions between winter and summer, we suggest that your company make reasonable adjustments to the material quantity combination before the seasonal transition. You may consider reducing the weight or grade of the liner paper, and increasing the weight or grade of the top paper.
3. If the surface layer still cracks or breaks after applying the preventive measures, it is recommended to use steam to evenly spray it onto the corrugated cardboard in the direction of the corrugations. By using the humidification method, the strength of the paperboard can be reduced, thereby alleviating the phenomenon of surface layer cracking.
4. To prevent the loss of moisture from the cardboard during transportation and storage, it is recommended that the cardboard be sprayed with a mist and then wrapped with an adhesive film. Additionally, it is suggested that downstream customers improve the storage environment and complete the die-cutting and edge-pressing as soon as possible.
The problems of wire breakage in cardboard, cartons and color boxes need to be prevented and reduced by taking measures at all stages of the processing of raw paper and cardboard, and cartons. We hope that your company can reasonably adjust production according to the product characteristics and seasonal changes.
