Eight reasons and solutions for poor adhesion of t

2022-08-16
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There are 8 Reasons and solutions for poor paperboard adhesion

there are many forms of poor paperboard adhesion, and the most common is 8. When the paperboard has poor adhesion, you should first observe its specific forms of expression, and then look for the reasons. The key is to suit the remedy to the case. 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

the reason is 3 hours; 1: Operation error. a. The glue tray breaks. b. The glue amount does not match the paper obviously

cause 2: equipment adjustment problem. a. The ballast roll of the pasting machine is not pressed or the gap is too large. b. The gap between the pasting roll and the tile roll of the single-sided machine is too large

solution:

(1) adjust the reasonable glue formula, control the temperature and viscosity of the glue, and avoid the glue blocking the hose, resulting in the glue disc breaking

(2) form various paper gluing systems according to their own material conditions, and train operators

(3) form a calibration system, regularly calibrate the ballast roll gap and the gap between the upper rubber roll and the paste roll, and the results show that a standard is formed

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 speed is too fast and the steam pressure is too low

reason 2: due to the weather, the gelatinization temperature of the glue formula was not adjusted in time

cause 3: abnormal drainage caused by abnormal steam pipe valve, and condensate is not discharged in time

solution:

(1) form your own glue formula system to cope with different climatic conditions

(2) establish a point inspection system to check the corresponding pipe valves and steam recovery system every day

third, there is glue, but it is golden yellow, and there are crystals

reason: excessive glue borax

solution:

adjust the amount of borax on the LCD

IV. there is glue, but it shows light yellow watermark

reason: the viscosity of glue decreases, and the dynamic solid content is low

solution:

improve the stability of glue, and the viscosity is stable within 3 seconds

v. there is glue, but the glue position is misaligned

reason 1: a large amount of static electricity is generated when the tissue paper is running on the hot plate, and the adsorption is too large

reason 2: the double-sided machine has insufficient ballast force or the conveyor belt surface is worn, causing slipping

solution:

(1) adopt the method of removing static electricity, such as spraying anti-static liquid, pasting adhesive tape, cardboard overheating board, etc

(2) replace the conveyor belt

segmental degumming occurs in the middle layer of the six and five layers of paperboard

reason: the ballast roll at the paper inlet of the double-sided machine jumps too much, and the conveyor belt vibrates, causing the secondary bonding of the paperboard

solution:

check whether the paper inlet ballast roller bearing is damaged

VII. Degumming at the edge of three-layer paperboard with high breaking resistance

reason: the edge of the surface paper is excessively heated during the operation of the drying channel, resulting in the early gelatinization of the edge glue

solution:

(1) adjust and advance the joint point of each layer of single tile at the drying crossing

(2) adjust the oven temperature configuration from low to high

(3) configure two glue formulas of the pasting machine

VIII. There are obvious differences between the driving surface and the driving surface

reason 1: the pressure on both sides of the double-sided dryer is inconsistent because its structure can not follow the long-term resonance bed lifting mechanism problems caused by itself

reason 2: the ballast pressure of the double-sided machine is inconsistent

solution:

(1) check and calibrate the ballast gap of the double-sided machine in time

(2) check and calibrate the horizontal position of the drying bed in time

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