Common problems and solutions during laminating (Part 1)

2023-12-15

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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