Additive-charged porous carrier material
AssigneeBrugg Kabel AG
InventorsUlrich Heese, Renato Salvel, Wolfgang W. Neumann
Life of this patent
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Abstract
The pourable porous carrier material is produced from at least one thermoplastic basic polymer with additives incorporated in the porous structure. First suitable foaming agents are added to the basic polymer, the mass is melted, mixed before and/or after melting. The mixture is then preferably extruded and cooled to form a pourable porous carrier material. At least one additive is added to the porous carrier material and mixed with this at a temperature (T.sub.M) below the melting point of the basic polymer but above the melting point of the additive. The porous carrier material has preferably ellipsoid pores which are brought into their longitudinal form during extrusion.
Claims14
Process which comprises:
- producing a pourable porous carrier material from at least one thermoplastic basic polymer having a melting point with additives incorporated in the porous structure;
- wherein at least one foaming agent is added to the basic polymer, the foaming agent and basic polymer are melted and mixed together with the mixing step taking place at least one of before and after melting, and the mixture cooled to form a granular or pelletized porous carrier material;
- adding into the porous carrier material at least one additive having a melting point, and mixing said additive with said porous carrier material at a temperature (T.sub.M) lying below the melting point of the basic polymer but above the melting point of the additive;
- and wherein pores of the carrier material contain said additive.
Dependencies are inferred from the claim text.