"Keeping in mind the, and now I can't think of the name of it, chart that
tells the static characteristics of materials."
That would be the TriboElectric Series;
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.
_______________________________________________
Tesla mailing list
Tesla@xxxxxxxxxx
http://www.pupman.com/mailman/listinfo/tesla