Interdental brush
In an interdental brush, the filaments are retained between two wire sections ( 1 a , 1 b ) which are twisted with one another. The wire sections ( 1 a , 1 b ) have a diameter (D) of 0.3 mm or less and consist of a nickel-free or low-nickel steel. These brushes are distinguished by an increased level of rigidity and an improved restoring force and are stable even if the wire has a small diameter.
1. Interdental brush comprising:
two wire sections formed of austenitic steel and having a diameter of 0.3 mm or less; and
filaments retained between the two wire sections which are twisted with one another, wherein:
the austenitic steel includes less than 0.05% nickel by weight,
a proportion of chromium in the steel is 17% by weight, plus or minus 3% by weight,
a proportion of manganese in the steel is 14% by weight, plus or minus 3% by weight,
a proportion of nitrogen in the steel is 0.5% by weight,
a proportion of carbon in the steel is 0.11% by weight,
a proportion of molybdenum in the steel is 2% by weight, and
the two wire sections have a tensile strength of 1000 N/mm 2 or more.
2. Interdental brush according to claim 1 , wherein the two wire sections have a diameter of more than 0.15 mm.
3. Interdental brush according to claim 2 , wherein the two wire sections have a tensile strength of 1200 N/mm 2 or less.
4. Interdental brush according to claim 1 , wherein the two wire sections have a tensile strength of 1200 N/mm 2 or less.
5. Interdental brush according to claim 1 , wherein the two wire sections are stretched or drawn out.
6. Interdental brush according to claim 1 , wherein the proportion of silicon in the steel is 0.25% by weight.
7. Interdental brush according to claim 1 , wherein the proportion of phosphorus in the steel is 0.02% by weight.
8. Interdental brush according to claim 1 , wherein the proportion of titanium in the steel is 0.006% by weight.