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Metal Strips - Materials / Filaments
 
Synthetic
Synthetic fill materials are either straight (level) or crimped.  Crimping provides a denser appearance to the brush and provides a more even brushing action.  Fill diameters range from .003” to .125”.  Synthetics have different characteristics and a broad cost range.
 
 
Nylon
Type 6.12
Superior type nylon used in applications calling for low water   absorption, good recovery, and abrasion resistance.

Type 6.6
Top quality, medium-priced with better wet and dry stiffness than nylon 6. good bend recovery, high heat and abrasion resistance.

Type 6
Durable nylon bristle at low cost.

 
Polyester
Offers many of the properties of nylon but does not lose its stiffness when wet. Polyester has excellent bend recovery and is a lower cost alternative to nylon 6.12.
 
 
Polypropylene
Versatile filament for a wide variety of applications. Polypropylene has excellent wet stiffness, abrasive tip cleaning action, lower recovery than nylon, non-brittle and is inert to most solvents, oils, acids and chemicals.
 
 
Polystyrene

An economical, flaggable filament available in a wide range of sizes and colors.

 
 
Abrasive nylon
Monofilament impregnated with either silicon carbide or aluminum oxide.  Longwearing and extremely abrasive.  Available in several sizes and grits. 
 
 
Natural
 
Horse Hair
Available in black and gray and several grades from very soft to quite stiff.  Cost is in the medium high to high range.
 
 
Goat Hair

Very fine and soft.  Expensive.

 
 
Tampico

Vegetable fiber.  Soft to medium texture that can withstand high heat and softens in water.

 
Bristle
Bristle is the stiffest of all natural materials.  Material has a natural taper from the butt end to the tips.
 
 
Wire
High carbon steel, stainless steel, brass and phosphorous bronze are the most common. Diameters range from .003”to the mid .020”.
 
 
         
  SPECIFICATIONS OF FILAMENTS AND FIBERS
Key:  E=excellent  G=good  F=fair  P=poor
           
                             
Material/Data Nylon 6 Nylon 6.6 Nylon 612 Polypro. Polyester Horsehair Bristle Vegetable Fiber
Diameters Available .003-.060 .003-.060 .003-.060 .006-.060 .006-.060 -- -- --
Spec. Gravity 1.13 1.04 1.04 .90-.91 1.32 1.36 1.32 Varies
Tensile Strength psi 50M-60M 60M-70M 50M-60M 50M-80M 40M-50M -- -- --
Melting point (F) 420 500 410 335 430 -- -- --
Heat Distortion (F) 250 250 250 225 250 -- -- --
Bend Recovery % 90 90 90 70-80 90 -- -- --
Dry Stiffness psi 450M 500M 450M 850M 450M -- -- --
Wet Stiffness psi 65M 425M 415M 825M 447M -- -- --
Abrasion Resistance G G E G E F F P
Bend Recovery E E E F E F F P
Resistance to set G G G P G G G F
Retention of stiffness in water P F G E E F G P
      RESISTANCE          
Dilute Acids P F G E G -- -- --
Strong Acids F-G F-G F-G G F-G -- -- --
Petroleum Distillates E E E G E -- -- --
Acetones & Keytones G G G E E -- -- --
Ethylacetates G G E G E -- -- --
Trichlorethylene Hydrocarbones G G E F-G F-G -- -- --
Hot Water F-G G G