High processing speeds with the production of coated papers and the demand for a process which is as troublefree as possible make corresponding demands on the auxiliary agents used. In this context, soaps and metal soaps, which have been further developed to special products by Peter Greven Fett-Chemie, render indispensable services.
The processing operation during and after coating are facilitated. Sticking of the coating on the upper calender roller is prevented. At the same time, the soaps and metal soaps are effective as waterproofing agents and reduce foam formation. Gloss and smoothness of the coated papers are improved.
LIGAFLUID CA 50 PN
LIGAFLUID CA 50 F
LIGAFLUID CA 50 CW
These are calcium stearate dispersions with a solids content of approx. 50% for the production of coatings recipes in the offset area. In addition to the good storage stability, these dispersions are distinguished by a high fineness and good compatibility in the coatings recipes. They may be used in the alkaline and slightly sour pH area. The rheology of the coatings is not impaired.
LIGAFLUID AS 25
LIGAFLUID AS 30
LIGAFLUID 30 AMW
Aqueous dispersion of ammonium stearate with favourable influence on the coating rheology, which is mainly used in the field of gravure printing. The products dampen the foam tendency during the processing operations.
LIGAFLUID 40 ZW
Aqueous zinc stearate dispersions used as slip additives for thermal paper. The dispersions are distinguished by good compatibility in the coating recipes. Basic whiteness and ageing stability are not affected.
LIGANOL ST 35 F
Liquid compound of slip and separating agents for primary use in the field of gravure printing. The product is distinguished by similar properties as the ammonium stearate, however, without the often disturbing smell of ammonia.
Products for abrasive papers
In particular with abrasive papers for dry grinding, metal soaps provide substantial improvements. The friction between the abrasive carrier and the ground is reduced. This results in lower temperatures during the grinding process, and the material surface is spared. Swarf build-up on the abrasive paper is not as fast, since the metal soaps coat the wheel swarf with a thin film and thus are effective as separating agents.
LIGAFLUID CA 50 PN
LIGAFLUID 40 ZW
LIGAFLUID 50 CW
These dispersions may be applied in diluted form to ready-made abrasive paper, e. g. by rolling, brushing, or spraying on. The special selection of the emulsifying agents guarantees the wetting of the abrasive carrier between the abrasives.
LIGA CALCIUMSTEARAT 800
LIGA ZINKSTEARAT 101/6
LIGA ZINKSTEARAT 101/6 WD
The application of these pulverised stearates occurs by means of a primer. However, it is also possible to produce one’s own dispersions. LIGA ZINKSTEARAT 101/6 WD provides advantages: this type of zinc stearate can be dispersed more easily by the inclusion of surface-active substances.
