Method for producing brushes, in particular interdental brushes, and brush, in particular interdental brush, and product group comprising a plurality of brushes

A method for producing a brush comprising (i) a handle having a front end, and (ii) a bristle-carrying stem having a longitudinal axis defining a longitudinal direction and including an elongated support core, an integral layer disposed on the support core, a bristle field having bristles configured to protrude from the integral layer and a neck element configured to connect the support core to the handle, the method comprising:

• injecting the handle, the neck element and the support core integrally from a first plastics material component;
• introducing the support core in a longitudinal direction through a bristle field cavity opening of an injection mold into a bristle field cavity;
• fixing the support core introduced into the bristle field cavity to avoid movement of the support core in the longitudinal direction;
• and
• applying a second plastics material component from an injection point of the injection mold onto the support core at an injection portion, which is situated at the front end of the handle facing the neck element to form the integral layer on the support core and the bristles protruding therefrom in an integral manner,
• wherein the second plastics material component overlaps a part of a surface of the handle and covers a part of a surface on a rear side of the neck element, and
• the neck element comprises a longitudinal, channel-like indentation configured to support flow of the second plastics material component from the handle to the support core.

A brush comprising:

• a handle having a rear end;
• and
• a bristle-carrying stem having a longitudinal axis defining a longitudinal direction and including an elongated support core, an integral layer, a bristle field having bristles configured to protrude from the bristle-carrying stem and a neck element configured to connect the support core to the handle,
• wherein the handle, the support core and the neck element are integrally formed from a first plastics material component,
• the integral layer is formed from a second plastics material component by injecting the second plastics material component at an injection portion, which is situated on the rear end of the handle opposite to the neck element in a longitudinal direction,
• the second plastics material component overlaps a part of a surface of the handle and covers a part of a surface on a rear side of the neck element, and
• the neck element comprises a longitudinal, channel-like indentation configured to support flow of the second plastics material component from the handle to the support core.