Cardboard has poor adhesion, there are many forms of expression, the most common are eight. When the cardboard has poor adhesion, you should first observe its specific manifestation, and then look for the cause, the right medicine is the key. This article will share 8 cases of poor cardboard adhesion and corresponding solutions!
1. No glue or obvious lack of glue on the glue surface
Reason 1: Operation error. a. The rubber disc is broken. b. The glue quantity does not match the paper quality obviously.
Cause 2: Device adjustment problems. a. The ballast roller of the paste machine is not pressed or the gap is too large. b. The gap between the paste roller and tile roller of the single-sided machine is too large.
Solution:
(1) Adjust the reasonable glue formula, control the temperature and viscosity of the glue, and prevent the glue from blocking the hose and causing the glue disk to break.
(2) Form various paper gluing systems according to the conditions of the materials used, and train the operating staff.
(3) Form a calibration system, regularly calibrate the gap between the ballast roller and the gap between the top roller and the glue roller, and form a standard.
Second, there is glue, but the glue surface is white
Reason 1: Operation error, the temperature does not match the gelatinization temperature of the glue. For example, the vehicle speed is too fast, the steam pressure is too low, etc.
Reason 2: Due to weather, the glue formulation did not adjust the gelatinization temperature in time.
Reason 3: The steam pipe valve is abnormal and the drainage is abnormal, and the condensate is not discharged in time.
Solution:
(1) Form your own glue formulation system to cope with different climatic conditions.
(2) Establish a spot inspection system and check the corresponding pipe valves and steam recovery systems every day.
3. There is glue, but it is golden yellow and has crystal
Reason: Excessive borax glue.
Solution:
Adjust the amount of borax.
4. There is glue, but it is light yellow watermark
Cause: The viscosity of the glue drops and the dynamic solid content is low.
Solution:
Improve the stability of the glue, the viscosity is stable within 3 seconds.
5. There is glue, but the glue is misplaced
Reason 1: The tissue paper generates a lot of static electricity when the hot plate is running, and the adsorption is too large.
Cause 2: The ballasting force of the double-sided machine is not enough or the surface of the conveyor belt is worn to cause slippage.
Solution:
(1) Use static electricity removal methods, such as spraying anti-static fluid, adhesive tape overheating board, etc.
(2) Replace the conveyor belt.
Six and five-layer cardboards have segmented degumming in the middle
Cause: The ballast roller of the paper inlet of the double-sided machine beats too much, and the conveyor belt shakes to cause secondary adhesion of the cardboard.
Solution:
Check the ballast roller bearing of the paper inlet for damage.
7. Three-layer cardboard edge degumming of high-resistance paper
Reason: The edge of the tissue is heated excessively during the drying tunnel operation, which causes the edge glue to gel in advance.
Solution:
(1) Adjust and advance the joint point of each layer of single tile at the drying tunnel entrance.
(2) Adjust the temperature configuration of the drying tunnel from low to high.
(3) Configure two glue formulas for gluing machine.
8. There is a clear difference between the transmission surface and the driving surface
Reason 1: The problem of the lifting mechanism of the drying bed of the double-sided machine produces inconsistent pressure on both sides.
Cause 2: The pressure of the ballast on the double-sided machine is inconsistent.
Solution:
(1) Check and calibrate the gap between the ballasts of the double-sided machine in time.
(2) Check and calibrate the horizontal position of the drying bed in time.
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