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Coextrudable multiphase dentifrice compositions

A composition, co-extrusion technology used in the field of multiphase dentifrice compositions

Inactive Publication Date: 2014-02-05
UNILEVER NV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Surprisingly, while the entrapped gas changes the relative viscosity and density of the phases, it does not appear to adversely affect the structural stability or extrudability of the dentifrice composition

Method used

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  • Coextrudable multiphase dentifrice compositions

Examples

Experimental program
Comparison scheme
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Embodiment Construction

[0056] Non-aerated Formulation A and aerated Formulation B were then co-extruded into a conventional dentifrice packaging tube with a single dispensing orifice using a coaxial nozzle assembly. The resulting packaged multiphase dentifrice composition according to the invention has a core (aerated formulation B) surrounded by a sheath (non-aerated formulation A). The composition stored in the tube has a generally central longitudinal axis that falls into the core. The composition has 10% core (by weight based on the total weight of the composition) and 90% sheath (by weight based on the total weight of the composition).

[0057] A strip of the above composition was extruded onto the bristles of a toothbrush. figure 1 is a photo of the strip extruded on a toothbrush. Discrete gas bubbles are clearly visible in the core. Furthermore, this setup was maintained stably without significant loss of aeration, even after more than 8 weeks of storage at room temperature.

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Abstract

The invention provides a packaged multiphase dentifrice composition in which an inner first phase is in physical contact with and surrounded by a visually distinct outer second phase, and in which the phases are coextrudable from a single dispensing orifice such that the extrudate has a core of inner first phase and a sheath of outer second phase surrounding the core of inner first phase, characterised in that entrained air or other gas is selectively incorporated into one of the phases, the gas being incorporated as discrete bubbles.

Description

field of invention [0001] The present invention relates to coextrudable multiphase dentifrice compositions. Background of the invention [0002] Aesthetics are known to play an important role in consumer choice and use of dentifrices. The unique visual appearance of the dentifrice provides aesthetics that are pleasing to the user and facilitate usage of the dentifrice. In some cases, visual effects such as streaks or particles have been used to differentiate and market new dentifrice products. But there is still a constant need for new and appealing visual variations for dentifrices. [0003] An example of a visually appealing multi-phase dentifrice is provided in WO2006 / 081912. It describes a multiphase toothpaste composition in which a first phase is disposed coaxially within a second phase. According to this disclosure, improved visual impact and better and more consistent dispensing from the tube is obtained by increasing and carefully configuring the viscosity of t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61Q11/00A61K8/02
CPCA61K8/0233A61K8/046A61Q11/00A61K2800/42
Inventor A.K.格林B.J.格罗夫斯
Owner UNILEVER NV