Whether the water-based film adhesive meets the quality requirements of composite products, in addition to the quality of the glue itself, but also related to the paper, film, equipment accuracy, operating experience and other supporting factors in the film coating process, after long-term practice, we summarized the common problems in the application of water-based film adhesive, and put forward the production reasons and solutions, to help the film coating personnel quickly find a solution.
Common Problem |
Cause |
Solution |
Combination fastness is not good |
The membrane surface tension is not enough |
Test the fitting surface ≥39 Dynes with Dyne pen before use |
Excessive ink thickness |
Lengthen the time after fitting |
|
The amount of glue is too small |
Increase the amount of glue appropriately |
|
Compound pressure is too small |
Increase pressure appropriately |
|
Radial fringe |
Using glue is too thick - causing stringing |
The glue itself thickens and changes the glue After the empty machine runs for a long time, the rubber tank thickens with new glue |
Compound pressure is too small |
Increase pressure appropriately |
|
Uneven or radial scratch on the surface of the roller - uneven thickness of the glue |
Smooth the top roller or replace it with a roller |
|
The film itself is curled and uneven - resulting in uneven gluing |
Flatten or replace the film with a new one |
|
Composite diagonal stripes |
The tension between the left and right sides is inconsistent when the film is removed |
Adjust tension until removed |
The pressure at both ends of the film is inconsistent |
||
The tension at both ends is inconsistent during winding |
||
The top roller has a taper - resulting in a different amount of glue, resulting in a variation in friction |
||
The lack of equality of each guide roller leads to oblique wrinkles |
||
The laminating board is uneven |
Too much winding tension - film strain |
Tone down |
The linear speed of the press roll is different from that of the cardboard transfer |
Fix a machine |
|
Wire plate uneven - deformed after moisture absorption |
Dry and recombine |
|
Excessive machine jitter |
Finishing machine |
|
Roller pressure is too low |
Increase roll |
|
The cardboard is husked along the radial edge |
Cardboard deformed by moisture - flounces |
Let dry before recombining |
Too little glue |
Increase glue |
|
Excessive machine jitter |
Reinforce the machine |
|
The edge of the roller overflow rubber dust in time to remove - edge |
Degumming |
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