Static poses one of the biggest risks to rubber products like rubber hoses. Let me explain how static forms and the dangers it brings.
How Static Forms on Rubber Products
During Production
Rubber contacts and rubs against materials like metal, wood, cotton, or chemical fibre cloth (chemical fiber fabric). This friction causes charge transfer, leading to static buildup on semi-finished products.
Resistance Factor
Most rubber products have a resistance greater than 10⁹ Ω/cm, which prevents static charges from leaking easily. As a result, static generation exceeds leakage, causing charge accumulation.
Conditions for Static-Induced Fire and Explosion
1.Sufficient static charge must exist on the separated interface, along with a potential difference high enough to trigger static discharge.
2.The energy from static discharge must be sufficient to ignite a flammable mixture.
3.Discharge must occur in a flammable mixture within the explosive range.
4.A human body insulated from the ground can accumulate static, becoming a “charged body.”
5.When the potential difference between the body and other objects reaches a critical value, spark discharge occurs.
Main Hazards During Rubber Product Handling
Explosion Risk
In spaces with flammable mixtures (within the explosion limit), if static discharge energy meets or exceeds the minimum ignition energy, explosions or fires can occur.
Electric Shock
Spark discharge between the human body and objects causes electric shocks, affecting health and risking secondary accidents.
Quality Impact
Static can compromise the quality of rubber products during manufacturing.
Electrical Interference
Static-generated waves can disrupt the normal operation of electronic devices.