Controlling Static in Industry

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Triboelectric Table

Column 1 (this col.): Insulator name. Col.2: Charge affinity in nC/J (nano ampsec/wattsec of friction). Col.3: Charge acquired if rubbed with metal (W=weak, N=normal, or consistent with the affinity). Col.4: Notes. Affinity nC/J Metal effect TriboElectric Table
Tests were performed by Bill Lee (Ph.D., physics). ©2009 by AlphaLab, Inc. (TriField.com), which also manufactured the test equipment used. This table may be reproduced only if reproduced in whole.
Polyurethane foam +60 +N All materials are good insulators (>1000 T ohm cm) unless noted.
Sorbothane +58 -W Slightly conductive. (120 G ohm cm).
Box sealing tape (BOPP) +55 +W Non-sticky side. Becomes more negative if sanded down to the BOPP film.
Hair, oily skin +45 +N Skin is conductive. Cannot be charged by metal rubbing.
Solid polyurethane, filled +40 +N Slightly conductive. (8 T ohm cm).
Magnesium fluoride (MgF2) +35 +N Anti-reflective optical coating.
Nylon, dry skin +30 +N Skin is conductive. Cannot be charged by metal rubbing.
Machine oil +29 +N
Nylatron (nylon filled with MoS2) +28 +N
Glass (soda) +25 +N Slightly conductive. (Depends on humidity).
Paper (uncoated copy) +10 -W Most papers & cardboard have similar affinity. Slightly conductive.
Wood (pine) +7 -W
GE brand Silicone II (hardens in air) +6 +N More positive than the other silicone chemistry (see below).
Cotton +5 +N Slightly conductive. (Depends on humidity).
Nitrile rubber +3 -W
Wool 0 -W
Polycarbonate -5 -W
ABS -5 -N
Acrylic (polymethyl methacrylate) and adhesive side of clear carton-sealing and office tape -10 -N Several clear tape adhesives are have an affinity almost identical to acrylic, even though various compositions are listed.
Epoxy (circuit board) -32 -N
Styrene-butadiene rubber (SBR, Buna S) -35 -N Sometimes inaccurately called "neoprene" (see below).
Solvent-based spray paints -38 -N May vary.
PET (mylar) cloth -40 -W
PET (mylar) solid -40 +W
EVA rubber for gaskets, filled -55 -N Slightly conductive. (10 T ohm cm). Filled rubber will usually conduct.
Gum rubber -60 -N Barely conductive. (500 T ohm cm).
Hot melt glue -62 -N
Polystyrene -70 -N
Polyimide -70 -N
Silicones (air harden & thermoset, but not GE) -72 -N
Vinyl: flexible (clear tubing) -75 -N
Carton-sealing tape (BOPP), sanded down -85 -N Raw surface is very + (see above), but close to PP when sanded.
Olefins (alkenes): LDPE, HDPE, PP -90 -N UHMWPE is below. Against metals, PP is more neg than PE.
Cellulose nitrate -93 -N
Office tape backing (vinyl copolymer ?) -95 -N
UHMWPE -95 -N
Neoprene (polychloroprene, not SBR) -98 -N Slightly conductive if filled (1.5 T ohm cm).
PVC (rigid vinyl) -100 -N
Latex (natural) rubber -105 -N
Viton, filled -117 -N Slightly conductive. (40 T ohm cm).
Epichlorohydrin rubber, filled -118 -N Slightly conductive. (250 G ohm cm).
Santoprene rubber -120 -N
Hypalon rubber, filled -130 -N Slightly conductive. (30 T ohm cm).
Butyl rubber, filled -135 -N Conductive. (900 M ohm cm). Test was done fast.
EDPM rubber, filled -140 -N Slightly conductive. (40 T ohm cm).
Teflon -190 -N Surface is  fluorine atoms-- very electronegative.