Cosmetic pencil and method for making the same
AssigneeRevlon Consumer Products Corporation
InventorsMelvin E. Kamen, Philip Bernstein
Life of this patent
Estimating the term…
Abstract
A pencil barrel is prepared by extruding, shaping, and cooling, under controlled conditions, a foamable, thermoplastic resin-based composition. The combination of the particular extrudable composition and the means of shaping and cooling the tubular extrudate obtained therefrom are readily useful as barrels, i.e. sheaths, for sharpenable pencils, particularly in the cosmetic industry. The resultant pencil barrels are characterized by their sharpenability, uniform satin-matte smoothness, outstanding printability, and their prolonged resistance to atmospheric conditions. The method for making said pencil barrels is also disclosed.
Claims5
A cosmetic pencil barrel composition consisting essentially of a thermoplastic material selected from the group consisting of polyvinyl chloride (PVC) in combination with a PVC stabilizer, poly(N-vinylpyrrolidone), cellulose acetate, urethane polymers, synthetic elastomers, natural rubber, polyethylene, polypropylene, polystyrene, and mixtures thereof, a foaming agent, a lubricant, a pigment, a nucleating filling component, and an acrylic impact modifier;
- wherein the barrel composition exhibits linear cellular formation and the inner surface of the barrel is scored to increase adherence of the cosmetic marking material which is made by a method comprising the steps of:
- (a) mixing a molten thermoplastic composition comprising a foamable thermoplastic material selected from the group consisting of polyvinyl chloride (PVC) in combination with a PVC stabilizer, poly(N-vinylpyrrolidone), cellulose acetate, urethane polymers, synthetic elastomers, natural rubber, polyethylene, polypropylene, polystyrene, and mixtures thereof;
- a foaming agent, a lubricant, a nucleating filler component, and an acrylic impact modifier,
- (b) extruding the mixture of step (a) through a crosshead die to form a continuous tubular extrudate,
- (c) introducing the tubular extrudate into a cooled water bath within a vacuum chamber through a calibrator designed to control foaming of the tubular extrudate,
- (d) cutting the cooled tubular extrudate into the desired pencil length.
Dependencies are inferred from the claim text.