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US 12,059,484 B2Granted
Method for producing powder leads and products produced therewith
AssigneeSchwan-STABILO Cosmetics GmbH & Co. KG
InventorsKatrin Hollmann-Raabe, Tamara Segets, Markus Schmitt, Irina Künstler, Stefan Mozer, Reinhard Pinzer, Christian Sprogar, Thomas Stadter
Life of this patent
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Abstract
A method for producing a powder lead is disclosed, wherein at least one colourant, at least one filler and at least one binder are mixed with a carrier liquid, leads are shaped from the wet compound, the leads shaped in step b) are guided through a chamber in which they are exposed to a pulverulent covering agent, and the powdered leads are guided into a drying apparatus and dried therein.
Claims15
A stabilized powder lead, comprising:
- a lead core containing at least one colourant, at least one filler, and at least one binder;
- and
- a sheath composed of a stabilizing covering agent consisting of a wax, a waxy substance, or a polymer, wherein the covering agent melts at a temperature between 50° C. and 120° C., and wherein the covering agent is less than 10% by weight of the stabilized powder lead and the depth of penetration of the covering agent into the lead core is less than or equal to 0.05 μm.
A powder lead obtained by the method that comprises the steps of:
- a. mixing at least one colourant, at least one filler, and at least one binder with a carrier liquid to form a wet compound,
- b. shaping leads from the wet compound to form shaped leads including a lead surface,
- c. guiding the shaped leads through a chamber,
- d. exposing the shaped leads to a pulverulent covering agent in the chamber to form powdered leads covered with a pulverulent covering on the lead surface, wherein the pulverulent covering is comprised of particles having a particle size of from 0.01 μm to 100 μm,
- e. guiding the powdered leads with the pulverulent covering into a drier, and
- f. drying the powdered leads with the pulverulent covering in the drier.
3 more elements
Dependencies are inferred from the claim text.