PROCESO Y APARATO PARA LA PRODUCCION DE UNA COMPOSICION DESODORANTE O ANTIPERSPIRANTE

Un proceso para la formación de barras desodorantes o antiperspirantes que comprende el mezclado de los constituyentes desodorantes o antiperspirantes para formar una composición, calentamiento simultáneo o subsecuente de la composición para formar una composición móvil y el suministro de la composición móvil a un dispensador para el llenado de recipientes o moldes, proceso caracterizado en cuanto que la composición fluida es producida continuamente, gracias a la introducción continua de los constituyentes a través de una pluralidad de orificios de entrada en un extrusor de tornillo a una velocidad sincronizada con el dispensado inmediato de la composición por parte del dispensador dentro de los envases o moldes. In a first aspect, a process for forming deodorant or antiperspirant sticks by continuously forming a mobile composition for dispensing into containers or molds at a rate matched with the rate at which it is dispensed, and in other aspects a process in which a mobile deodorant or antiperspirant composition is dispensed by injection molding, i.e. a process in which the deodorant or antiperspirant composition is dispensed under pressure. The composition at the time of injection moulding is preferably either in the vicinity of its regular set temperature, particularly in the range of about 0-3° C. below the regular set temperature and/or partially structured at the time of its delivery it into a container or mold. The deodorant or antiperspirant composition is preferably continuously produced in a screw extruder, especially a twin screw extruder, which is controlled to deliver the composition in a substantially semi-solid state, at a temperature close to its regular set temperature and is injected into the container or barrel at a pressure at the point of injection that is often greater than 15 psi. and in many instances from 200 to 400 psi in the injection head. Apparatus for forming deodorant or antiperspirant sticks by injection molding is also described. The combined process offers benefits for incorporating sensitive ingredients and ameliorating sedimentation of particulates such as particulate antiperspirant actives.