Dispenser for personal care composition

Abstract

A dispenser, in the form of a sachet, made from a water-soluble plastics material, containing a personal care composition including at least one surfactant together with an effervescent base material, the base material including any material or combination of materials that when in contact with a sufficient amount of water liberates gas.

Description

[0001] 1. Technical Field[0002] The present disclosure relates to a dispenser containing a personal care composition and, more particularly, to a dispenser containing such compositions as are generally added to a bath.[0003] 2. Related Art[0004] Many types of personal care products are available for use in the bath. Some deliver additives to the bath, such as minerals, emollients, colour, fragrance, skin conditioning agents and so forth. Others are designed to deliver lather to the bath. While this may be achieved through the incorporation of a suitable surfactant into the formulation many of these products, particularly those with high surfactant levels, require a large degree of hand agitation to aid their dissolution. As a result of this foam does not form in any great amount until some time after the product has been added. More recently effervescent bath tablets have been marketed. One composition of this type is described in U.S. Pat. No. 6,121,215. Anhydrous solid systems of ...

AI Technical Summary

Problems solved by technology

While this may be achieved through the incorporation of a suitable surfactant into the formulation many of these products, particularly those with high surfactant levels, require a large degree of hand agitation to aid their dissolution.

Surfactants have occasionally been added to these systems but at low levels to help bind these systems together and at such low levels no foam is produced.

While it would seem that the inclusion of a higher level of surfactants in these systems would deliver a suitably foaming effervescent bath product, this is not actually the case.

It is a further observation that the pressure of binding involved in these systems also affects the speed of dissolution and effervescence and hence foaming.

As the tableting pressure is increased, these systems dissolve more slowly and effervesce and foam less readily.

However, the speed of dissolution and hence foaming from such a system, while improved over the standard tablet pressure method of formation, is not particularly rapid.

In addition, these systems tend to leave undissolved residual material in the bath.

This is not acceptable to the consumer, therefore, the undissolved residual material is a major disadvantage of currently marketed bath tablets and bombs.

In addition, many of the additives included in these formulations, such as enzymes and bleach, are skin irritants which clearly are not suitable in bath formulations.

The surfactants used in laundry applications are harsh and would not be suitable for bath applications as they would be likely to irritate the skin.

Consequently, such a sachet including a laundry composition would be unsuitable for use in the bath.

In use the sachet or enclosure quickly dissolves under running water and the formulation inside reacts, quickly dissolves and rapidly produces copious amounts of foam overcoming the poor dissolution properties experienced currently with some conventional bath liquids.

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