Лако-красочные материалы — производство

Four processing steps for the production of hygienic papers, (e. g. toilet paper, kitchen rolls) involve the use of adhesives:

Tube Winding. Mainly dextrin adhesives are used and/or plasticized homopoly­meric poly(vinyl acetate) emulsions, but glutin glues are also used in special cases.

Pick-up adhesives bond the tissue to the Kraft paper tube. Depending on the machine systems the following adhesives are used: If the adhesive is applied directly to the tube by a slice (machine speed up to 400 m/min), aqueous colloidal solution systems at room temperature are normally used. If the adhesive is applied directly to the tube by a nozzle (machine speed up to 450 m/min), aqueous polyol-based adhesives are often used at room temperature.

When the adhesive is applied by a slice to the application roller, which transfers the glue to the tube (machine speed up to 650 m/min), hot-melt adhesives are used at 60-80 °С.

For high speed machines (up to 850 m/min), in which the adhesive is applied directly as a strip by means of a nozzle (temperature of the nozzle 80 °С), aqueous colloidal solution systems are used.

Laminating Adhesives. Aqueous adhesives based on cellulose or po! y(vinyl alcohol) for the ply lamination of tissue papers must give clean machinability, good initial tack, and reliable bonding strength of the tissue laminates.

Tail Tie. For this application aqueous adhesives based on cellulose or poly(vinyl alcohol) are used. For the tail tie of tissue paper rolls, products with high wet tack, transparent film, and a low final bond strength are necessary.