Static Resistant Hoses and NFPA 660
Vacuum Hoses for use with Explosion-Proof Vacuums
Vacuum Hoses for HAZLOC
What Is Static Electricity?
Static electricity is a buildup of electric charges on objects. Charges build up when negative electrons are transferred from one object to another. The object that gives up electrons becomes positively charged, and the object that accepts the electrons becomes negatively charged. This can happen in several ways.
Static Conductive meaning:
Conductivity is a material's ability to allow electrical charges (electrons) to move through it.
Static Dissipative meaning:
"Static dissipative" refers to materials or objects that allow static electricity to flow slowly and in a controlled manner, preventing sudden, potentially damaging electrostatic discharges (ESD).
High Concentration of Conductive Resin in Hose Material
A vacuum hose whose only means of eliminating static is a copper ground wire running through the helix is considered static dissipating. Lower concentrations of conductive resin are also regarded as static dissipating.
A Conductive Hose has higher levels of conductive resin impregnated within the hose construction.
The conductive hose is better for fighting static than the hose with a ground wire, contrary to what many people believe. A hose's static conductivity is measured in units of "sheet resistance" or ohms squared. You should look at the surface resistivity levels, not whether it has a ground wire.
- Conductive: when complete dissipation of static charges is required
- Static dissipative: when a controlled discharge is needed
AATCC Test Method 76-2001
AATCC Test Method 76-2001, "Electrical Surface Resistivity of Fabrics," determines the electrical resistance of fabrics, which can influence electrostatic charge accumulation.
AATCC is the American Association of Textile Chemists and Colorists
Hose for HAZLOC Applications
Static Dissipative Hose
FDA Approved Static-Dissipative Hose impregnated with conductive resin to have a Surface Resistivity level: 108-1010 Ohms/Square
Static Conductive Hose
Conductive Hose impregnated with higher concentrations of conductive resin to have a Surface Resistivity Level: 103 - 105 Ohms/Square
Dissipative Hose with Ground Wire
Surface Resistivity Level:108 - 1010 Ohms/Square