Plastic General

In addition to ACEMATT® products based on precipitated silicas, Evonik Degussa GmbH also supplies ACEMATT® OP 278 for special applications.

ACEMATT® OP 278

As a matting agent, ACEMATT® OP 278 is mostly effective in plastic films/foils made from PVC (with or without softeners), ABS or PUR. PS and SAN products can be effectively matted as well.

ACEMATT® OP 278 significantly reduces residual brilliance of calandered film (only a very small quantity is required and we recommend approx. 1.0 percentage weight). Using ACEMATT® OP 278 will also increase surface roughness, for a dry grip feel and attractive texture.

ACEMATT® OP 278 is appropriate for blow film as well. Adding a matting agent such as ACEMATT® OP 278 facilitates quick product changes in film manufacturing lines with considerably shorter retooling times. The matting achieved with ACEMATT® OP 278 remains stable throughout onward processing steps in film manufacturing (stretching).

ACEMATT® OP 278 is a copolymer made from the monomer building blocks methylmethacrylate (MMA), styrene (S) and butylacrylate (BA). The matting particles (BA, S) are embedded in a PMMA matrix and are progressively freed by shearing in the mixture preparation stage (e.g. dryblend).

ACEMATT® OP 278 comes as a powder with excellent flow properties and high pouring density that can easily be added to dryblends or any other types of premixes.

SIPERNAT® 50 S and SIPERNAT® 310

Are effective as matting agents in thermoplastics such as PE, PP and ABS.

Using approx. 5 weight percent of SIPRNAT® 50 S and SIPERNAT® 310 reduces the residual gloss of extruded, semi-finished products. Beside the amount added of the matting component, the applied processing technique has an effect on the resulting matting efficiency. Generally the required dosage is higher in injection moulding in comparison to extrusion process. Here especially the selected injection moulding parameters and cavity surface have an impact on the residual gloss.
SIPERNAT® 50 S and SIPERNAT® 310 are synthetic, amorphous silica obtained by a precipitation process. In order to achieve a good matting effect, it is important to disperse the silica properly in the polymer matrix. For this we recommend to begin with the manufacture of a compound (e.g. twin screw extruder).