Loose unbonded areas of different shapes leave the tissue out of the corrugated core paper, exhibiting irregular bulges.

Cardboard bubble in operation

Situation 1

When the single-side machine runs at a high speed, continuous paper is produced in the center of a single-sided paper web or on a face paper that crosses a considerable part of the paper web (in relation to the paper edge portion). Area.

the reason

Insufficient heat leads to white paste line

Inaccurate pressure roller in high

Wet lines on the tissue

The tension of the paper or core paper on the entire paper is inconsistent

The gelatinization temperature is too high

Overheating leads to crystal-like paste lines

Pressure roller position is inaccurate

Measure

Check steam pressure in all pressure pipes, siphons and steam quality

Check pressure roller height and adjust according to equipment manufacturer's standards

Increase tension or wrap angle to increase face and core paper temperature

Check for misaligned device parts

Check for worn rollers due to improper use, use adjustable tension rollers to ensure uniform tension

Check the gelatinization temperature and adjust to the appropriate standard

Reduce the wrap angle on the tissue preheater and the core paper pre-conditioner and withdraw the pressure roll stand, check the hydraulic and pneumatic roller drive system for proper operation