Toothbrush head and method for producing the same

A - Human Necessities – 46 – B

Patent

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Details

A46B 9/04 (2006.01) A46B 9/06 (2006.01) A46D 1/00 (2006.01)

Patent

CA 2612499

The invention relates to a toothbrush head comprising a plurality of substantially peduncular, elastic cleaning elements that are fastened on a cleaning element support, preferably combined to tufts, and project from the support. The invention also relates to a method for producing such a toothbrush head. The invention is characterized by not using conventional bristles or filaments as the cleaning elements, which bristles or filaments are always produced from individual plastic fibers which are shortened to the required length of the bristles and combined to tufts. The invention allows to replace the aforementioned bristles or filaments having nondirectional mechanical properties, i.e. properties that are identical in all directions at an angle to the longitudinal axis, with film strips as the cleaning elements, said strips being produced from a sheet of film by suitable methods of separation. The required mechanical, especially directional properties are conferred on the film strips by suitably choosing the starting film, especially in terms of its thickness and composition, and by suitably choosing the geometry thereof. The invention allows to confer on the film strips, in a simple manner, different mechanical properties such as flexural strength, elasticity, recovery, bending deflection in different directions at an angle to their longitudinal axis.

La présente invention concerne une tête de brosse à dents comprenant une pluralité d'éléments de nettoyage élastiques en forme de tiges qui sont fixés à un support d'éléments de nettoyage, de préférence, par touffes et en saillie sur ce support. L'invention concerne également un procédé de production d'une telle tête de brosse à dents. Selon l'invention, on utilise comme éléments de nettoyage aucun poil ou filament classique ayant, comme forme initiale, des fibres de matière plastique régulières qui sont coupées à la longueur nécessaire des poils et sont réunies en touffes. A la place de ces poils ou filaments aux propriétés mécaniques identiques non orientées, c'est-à-dire dans toutes les directions transversales à l'axe longitudinal, l'invention propose d'utiliser comme éléments de nettoyage des bandes de films qui sont réalisées dans une feuille de film par séparation appropriée du procédé de transformation. On peut obtenir de telles bandes de films aux propriétés mécaniques, notamment orientées souhaitées par le choix approprié du film initial, notamment son épaisseur et sa composition de matériau ainsi que le choix approprié de la géométrie. L'invention permet notamment d'obtenir de manière simple des bandes de films ayant différentes propriétés mécaniques comme l'effort de flexion, l'élasticité, la force de rappel, la courbe de flexion etc dans différentes directions transversales à son axe longitudinal.

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