Лако-красочные материалы — производство

Pick-up adhesives, which sometimes are referred to as ‘transfer adhesives’, start the laminated tissue paper winding onto the paper core. To provide for reliable transfer at high line speeds, they are designed to have a high wet bonding capacity and good processability. Furthermore, they stain neither the core nor the tissue, and are designed to release easily allowing the last sheet on the core to be removed without fiber tear.

Depending on the machine construction and the applicator used, different pick-up adhesives are employed. Most frequently, these are aqueous systems based upon natural or synthetic polymers such as starch derivatives or high-molecular-weight polyethylene glycol (PEG) that can be processed at room temperature. The adhesives are applied to the core either by means of disks or nozzles. Hot melts, such as those based on synthetic resins usually applied by means of disks, are only rarely used as pick-up adhesives for tissue papers.