Processing of bristles

Abstract

The invention relates to bristles, which can be used in brushes, particularly hair brushes, and to a method for producing such bristles. A method is disclosed for molding a head profile onto at least one bristle that can be used in a hair brush, wherein the at least one bristle is guided on a bristle carrier, wherein contactless heating acts upon at least the bristle head.

1 . A method to mold a head profile ( 20 ) onto at least one bristle ( 10 ) that can be used in a hair brush, in which the at least one bristle ( 10 ) is guided on a bristle carrier ( 30 ), wherein contactless heating acts upon at least the bristle head ( 12 ). 
     
     
         2 . The method according to  claim 1 , wherein the longitudinal axis of the bristles is aligned vertically. 
     
     
         3 . The method according to  claim 2 , wherein the bristle head ( 12 ) points toward the top. 
     
     
         4 . The method according to  claim 2 , wherein the bristle head ( 12 ) points toward the bottom. 
     
     
         5 . The method according to any of the preceding claims, wherein the contactless heating occurs in a heating chamber ( 42 ) that at least partially surrounds the at least one bristle ( 10 ). 
     
     
         6 . The method according to  claim 5 , wherein the heating chamber ( 42 ) has a smallest internal diameter, axially with respect to the longitudinal axis of the bristles, that is greater than the diameter of the bristles by a factor of 3-6. 
     
     
         7 . The method according to  claim 5  in which the at least one bristle ( 10 ) is immersed into the heating chamber ( 42 ) and has a certain immersion depth along its longitudinal axis, and said immersion depth is greater than the diameter of the bristles by a factor of 1-4. 
     
     
         8 . The method according to any of the preceding claims, wherein an essentially spherical-shaped head profile ( 20 ) is produced. 
     
     
         9 . The method according to  claim 8 , wherein the diameter of the head profile ( 20 ) is greater than the diameter of the bristles by a factor of 1.1 to 3. 
     
     
         10 . The method according to any of the preceding claims, wherein the heating chamber ( 42 ) is formed as a heating tunnel ( 40 ), and the bristle ( 10 ) on the bristle carrier ( 30 ) is guided through the heating tunnel ( 48 ). 
     
     
         11 . The method according to  claim 10  in which the heating tunnel ( 48 ) has a U-shaped profile. 
     
     
         12 . The method according to any of the preceding claims, wherein the heating time is between 10 and 30 seconds. 
     
     
         13 . The method according to any of the preceding claims, wherein the walls of the heating chamber ( 42 ) have a temperature of from 250 to 350° C. 
     
     
         14 . The method according to any of the preceding claims, wherein the bristle ( 10 ) was produced flash-free. 
     
     
         15 . A bristle ( 10 ) that can be used for a hair brush that was produced according to a method according to any of the preceding claims.