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STAPLE AND RESIN
SET
The Hill Brush Company
Ltd has developed a unique twin approach of retaining tufts
by both Staple and Resin within its hygiene brush range. The
tuft is first "punched" into the brush back with
a stainless steel staple, then Epoxy resin is floated into
a recess on the face of the brush. The resin permeates the
bottom of the hole, covering the filaments and the staples
as it goes. This makes the chance of a filament pulling out
extremely remote and it inhibits the accumulation of dirt
or moisture in the tuft holes.
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WIRE DRAWN
Wire drawing is not used
as a method of brush manufacture by Hill Brush, but is still
used for small quantity production, and for some very high
quality brushes. With wire drawing, the brush back is in two
halves. The front part, into which the tufts are filled, has
the tuft holes pre-bored with much smaller diameter holes
right through the back of the stock. A continuous strand of
wire then threads up through one tuft hole, around the tuft
(which is pulled into the hole), back down the hole and on
to the next.
When all of the tuft holes have been filled the wire is tied
off, and often glue is spread across the brush back (over
the wire), so that if the wire broke, not all of the tufts
would come out. Finally the back part of the stock is screwed
onto the front part (with the tufts in) to cover the wires.
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