It means that the single-sided or double-sided paper is textured, and the lighter the weight of the paper is, the more common it is.

the reason

One side machine or gluing machine too much glue

The eccentric rotation rate of the rubber roller or metering roller is too high

Metering roller gap is not parallel

The rubber roller or metering roller is worn or damaged

Rubber roller or metering roller bearing wear metering roller squeegee blade wear or improper position adjustment

Pressure on the paper roller on the gluing machine is too high

The speed ratio between single-sided paper and rubber rollers is not standard

Paste solid content is too low

Paste viscosity is too low

Corrugated roller wear

Uneven corrugated

Face paper humidity is too high

The temperature is too high

Measure

Check the working conditions of the top roller and the metering roller and the parallel situation of the metering roller gap. If necessary, replace the metering roller and the top roller.

Check the squeegee knife, adjust or exchange

Reduce the pressure of the platen roller

Check the speed ratio, adjust the speed of the roller if necessary

Increase solids content in paste formulations

Check paste viscosity, adjust if necessary

Check corrugating roller and replace if necessary

Eliminate rugged corrugations without increasing the amount of glue.

See the section "Rough Corrugated"

Adjust preheater wrap angle to reduce excess humidity

Increase operating speed, reduce hot plate temperature, reduce face

Preheater wrap angles on paper and single-sided paper