FILAMENTS - GENERAL FEATURES

A brush is rather special artefact. Considered in general terms, it has clearly defined geometrical properties and dimensions, while in local terms the work surface is composed of thousands or millions of tiny circles, i.e. the tips of the filaments making up the brush. This characteristic means that a brush is radically different from all other mechanical devices utilised in the technical field. The work surface of a brush can be hard or soft, oriented or isotropic, locally variable, and can offer a very high level of adaptability to match the irregularities of the part to be cleaned. Each filament features an individual behaviour pattern, although overall it is part of a single working surface.
The filaments are therefore the basic component parts of a brush.
Filaments can be of three different types:

  • Synthetic
  • Natural
  • Metal

Material
D
PS
A
T
max
T
min
R
RE
RC
FDA
Principal application
PA 6
0.10
-2.00
1.13
10
+100
-40
500
1xE11
X
.
Food industry, good elastic memory
PA 6.6
0.10
-2.00
1,14
9
+120
-40
550
1xE11
X
.
Food industry, very good elastic memory
PA 6.12
0.07
-2.00
1.06
3.0
+110
-40
440
1xE11
X
.
Food industry, very good elastic memory also with water
Abrasive
PA 6.12
0.50
-1.60
1.25
3.0
+110
-40
440
1xE11
X
  Polishing, satining, finishing
PA HT
0.20
-0.80
1.18
3.7
+190
-20
400
 
    High working temperatures
PP
0.15
-3.00
0.89
0.1
+80
-20
470
1xE16
XX
.
Food industry, also with water, moderate mechanical stress
PE
0.30
-1.00 
0.92
0.1 
+70
-50 
170
1xE12
XXX
.
Chemically aggressive environments, delicate surfaces
PBT
0.20
-3.00 
1.31
0.35
+100
-40
420
 
XX
.
Food industry, abrasion resistance also with water
PEEK
0.20
-0.80
1.32
0.15 
+200
 
720 
 
XX
  High working temperatures and high mechanical stress
FIBRE GLASS
1.00
-3.00
1.91 
0.25
+155
 
1450
 
    Excellent wear resistance
THUNDERON
0.03
1.28
0.8
+150
 
5xE-01
    Dissipation of electrostatic charges
HORSEHAIR
0.12
med
1.00
50
+150
-150
1xE-16
    High temperatures and delicate surfaces
PIG BRISTLE
0.15
med
1.10
40
+150
-150 
-
1xE16
    High temperatures, more aggressive action than horsehair
GOAT HAIR
0.05
med
1.06
60
+150
-150 
-
1xE16
    Very delicate surfaces
TAMPICO FIBRE
0.25
med
0.86
35
+160
-150 
-
1xE16
    High temperature, light abrasive action
HIGH STRENGTH STEEL
0.12
-0.70
7.85
-
+300
-
1900
1.7xE-05 
X
  Cleaning and satining of hard metals
VERY HIGH STRENGTH STEEL
0.12
-0.70
7.85
-
+300
-
2300
 1.7xE-05
X
  Treatment of metals with high mechanical stress
STAINLESS STEEL
0.12
-0.50
7.90
-
+450
-
2000
1.7xE-05 
XXX
.
Food industry, presence of moisture or aggressive environments
HARDENED STEEL
0.20
-0.70
7.85
-
+350
-
2000
1.7xE-05 
X
  Harsh mechanical scraping action
MILD STEEL
0.06
-0.40
7.85
-
+200
-
650
1.7xE-05 
X
  Cleaning and satining of soft metals
BRASS
0.06
-0.30
8.50
-
+160
-
900
 7xE-06
XX
  Non-aggressive treatment of metals
PHOSPHOR BRONZE
0.06
-0.50
8.80
-
+160
-
950
7.5xE-06 
XXX
  Non-aggressive treatment of metals, chemically aggressive environments

LEGENDA
D = Filament diameter (mm)
PS = Specific gravity (Kg/dmc)
A = Water absorption (%)
Tmax = Maximum working temperature (°C)
Tmin = Minimum working temperature (°C)
R = Tensile strength (N/mmq)
RE = Electrical impedance (Ohm cm)
RC = Chemical Resistance (X = poor, XX = moderate, XXX = good)
FDA = Food grade material in compliance with US Food and Drug Administration norms. Ambient temperature only.
 
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