Method of fixing bristles into ferrules of brush heads

Abstract

A method of fixing bristles into ferrules of brush heads, comprises providing a composition comprising an epoxy resin, applying the composition to end portions of the bristles, locating the end portions of a bunch of the bristles within a ferrule with the resin in contact with the ferrule, and effecting curing of the resin to adhere the bristles to the ferrule. The resin composition is such that the curing is effected in no more than 60 minutes and the resin on curing adheres within and to the ferrule and does not undergo excessive shrinkage during curing or subsequent cooling such that its adhesion to the bristles and the ferrule is not lost. Further, a method of fixing bristles into a ferrule of a brush head, comprises providing a composition comprising an epoxy resin and including a curing agent based upon a fatty acid and an aliphatic amine, the method comprising applying the composition to end portions of the bristles, locating the end portions of a bunch of the bristles in a ferrule with the resin in contact with the ferrule, and effecting curing of the resin to adhere the bristles within and to the ferrule.

1 . A method of fixing bristles into a ferrule of a brush head, comprising providing a composition comprising an epoxy resin, applying the composition to end portions of the bristles, locating the end portions of a bunch of the bristles within a ferrule with the resin in contact with the ferrule, and effecting curing of the resin to adhere the bristles to the ferrule, the resin composition being such that the curing is effected in no more than 60 minute and the resin on curing adheres within and to the ferrule and does not undergo excessive shrinkage during curing or subsequent cooling such that its adhesion to the bristles and the ferrule is not lost.  
     
     
         2 . A method of fixing bristles into a ferrule of a brush head, comprising providing a composition comprising an epoxy resin and including a curing agent based upon a fatty acid and an aliphatic amine, the method comprising applying the composition to end portions of the bristles, locating the end portions of a bunch of the bristles in a ferrule with the resin in contact with the ferrule, and effecting curing of the resin to adhere the bristles within and to the ferrule.  
     
     
         3 . A method according to    claim 2   , wherein the epoxy resin and the curing agent are mixed in a ratio of 3.5:1 to 4.5:1 by weight to formulate the composition.  
     
     
         4 . A method according to any preceding claim, wherein the epoxy resin comprises bis phenol A epichlorohydrin epoxy resin.  
     
     
         5 . A method according to any preceding claim, wherein the epoxy resin includes inert filler.  
     
     
         6 . A method according to any preceding claim, wherein curing of the epoxy resin is effected at 50 to 200° C.  
     
     
         7 . A method according to any preceding claim, wherein after curing the brush head is subjected to subsequent operations.  
     
     
         8 . A method according to either preceding claim, wherein the curing is effected in a no more than 30 minutes.  
     
     
         9 . A method of fixing bristles into a ferrule of a brush head, substantially as described herein in the Example.