CORE FOR WRITING, DRAWING AND/OR PAINTING IMPLEMENTS AND METHOD FOR THE PRODUCTION THEREOF
A core for writing, drawing and/or painting implements, including at least one binder, at least one wax, at least one coloring substance and at least one filler. The core is in the form of a lead core and/or colored core, the at least one binder is hyroxypropyl cellulose and the content of the at least one binder is 7 to 45 wt. %.
1 - 6 . (canceled)
7 . A core for writing, drawing and/or painting implements, comprising: at least one binder; at least one wax; at least one coloring substance; and at least one filler, wherein the core is a lead core and/or colored core, wherein the at least one binder is hydroxypropyl cellulose (HPC) and wherein the content of hydroxypropyl cellulose is 7 to 45 weight %.
8 . The core according to claim 7 , wherein the content of hydroxypropyl cellulose is 10 to 35 weight %.
9 . The core according to claim 7 , wherein the core comprises
7 to 45
weight %
HPC (binder 1)
5 to 65
weight %
fillers
0.5 to 15
weight %
coloring substance (pigment)
0 to 30
weight %
binder 2
0 to 30
weight %
wax and/or oils
0 to 15
weight %
surfactant.
10 . The core according to claim 7 , wherein the core particularly preferably contains
10 to 35
weight %
HPC (binder)
9 to 50
weight %
fillers
1.5 to 14
weight %
coloring substance (pigment)
0 to 30
weight %
binder 2
0 to 30
weight %
wax and/or oils
0 to 10
weight %
surfactant.
11 . A method for producing a polymer-bound core according to claim 7 , comprising forming the core by extrusion.
12 . A method for producing a polymer-bound core according to claim 7 , comprising the steps of:
mixing and granulating all components of the core to a core granulate;
extruding the core granules at a temperature in a range of 100 to 180° C. in an extruder through a mouthpiece to form endless core strands;
cooling and solidifying the endless core strands; and
cutting the endless core strands to a given length.