Pencil lead for writing, drawing and/or painting devices
A polymer-bonded pencil lead for writing, drawing, and/or painting devices, including at least one polymer binder, one wax, and at least one filler. The pencil lead includes 0.5 to 2.5% by weight palm oil.
1. A polymer-bonded pencil lead for writing, drawing, and/or painting devices, comprising: at least one polymer binder; one wax; and at least one filler, wherein the pencil lead includes 0.5 to 2.5% by weight palm oil.
2. The polymer-bonded pencil lead according to claim 1 , wherein the pencil lead contains
10 to 30% by weight
Polymer binder
2 to 25% by weight
Wax
0.5 to 2.5% by weight
Palm oil and
Remainder
Filler(s).
3. The polymer-bonded pencil lead according to claim 1 , wherein the pencil lead contains
15 to 25% by weight
Binder
4 to 20% by weight
Wax
0.5 to 2.5% by weight
Palm oil and
Remainder
Filler(s).
4. The polymer-bonded pencil lead according to claim 1 , wherein the at least one binder is constituted from at least one polymer of the group consisting of polystyrene (PS), styrene acrylonitrile (SAN), styrene butadiene (SB), polyolefins (PO) and acrylonitrile-butadiene-styrene (ABS).
5. The polymer-bonded pencil lead according to claim 1 , wherein the at least one wax is constituted from at least one wax from the group consisting of stearates, montan waxes, amide waxes, and paraffins.
6. The polymer-bonded pencil lead according to claim 5 , wherein the at least one wax consists of calcium stearate or includes calcium stearate.
7. The polymer-bonded pencil lead according to claim 1 , wherein the at least one filler includes at least one filler from the group consisting of graphite, carbon black, hexagonal boron nitride, layered silicates, chalk, heavy spar, coloured pigments and/or achromatic pigments.
8. The polymer-bonded pencil lead according to claim 1 , wherein the lead is a pencil lead and includes
15 to 25% by weight
Binder
4 to 12% by weight
Wax
0.5 to 2% by weight
Palm oil and
Remainder
Graphite or graphite
and carbon black.
9. The polymer-bonded pencil lead according to claim 8 , wherein the lead is a pencil lead and includes
15 to 25% by weight
Polystyrene
4 to 12% by weight
Calcium stearate
0.5 to 2% by weight
Palm oil and
Remainder
Graphite or graphite
and carbon black.
10. The polymer-bonded pencil lead according to claim 1 , wherein the lead is a coloured pencil lead and includes
15 to 25% by weight
Binder
4 to 12% by weight
Wax
0.5 to 2% by weight
Palm oil and
Remainder
Layered silicate(s) and/or
hexagonal boron nitride
and at least one coloured
pigment and/or one
achromatic pigment.
11. The polymer-bonded pencil lead according to claim 1 , wherein the lead is a coloured pencil lead and includes
15 to 25% by weight
Polystyrene
4 to 12% by weight
Montan wax
0.5 to 2% by weight
Palm oil and
Remainder
Talcum and/or hexagonal
boron nitride and at least
one coloured pigment
and/or one achromatic
pigment.
12. A method for producing a polymer-bonded pencil lead as recited claim 1 , including the step of extruding the pencil lead.