Anti-static mechanism and MC nylon substrate foundation
(1) Static electricity problems and protection needs
Ordinary MC nylon (such as unmodified cast nylon) has a surface resistivity of >10¹³ Ω (insulator), and is prone to accumulate static charge (voltage can reach thousands of volts) during friction, separation or contact charging. When the electrostatic discharge (ESD) energy exceeds 0.2mJ (such as the minimum ignition energy of methane in petrochemicals) or adsorbs dust particles (particle size <1μm), it will cause:
Electronic industry: static electricity breakdown of microcircuits during chip packaging (such as ESD threshold of electrostatic sensitive devices in wafer fabs <100V);
Precision manufacturing: dust adsorption contaminates optical components (such as semiconductor lithography machine lenses);
Hazardous chemical scenarios: static electricity sparks ignite flammable and explosive gases (such as oil storage tanks, organic solvent environments in pharmaceutical factories).
(2) Characteristics of MC nylon substrate
MC nylon (Monomer Casting Nylon) is a nylon material directly cast by anionic ring-opening polymerization of caprolactam monomer. Compared with extruded PA6/PA66: Ultra-high crystallinity (70% - 90%): The molecular chains are highly oriented, giving it a tensile strength of 80 - 120 MPa and a flexural modulus of 5000 - 8000 MPa (common PA6 is only 50 - 70 MPa and 2000 - 3000 MPa);
Self-lubricity: The friction coefficient is only 0.1 - 0.2 (common plastics are 0.3 - 0.4), and it has excellent wear resistance (wear loss ≤ 0.05 cm³/(1.61 km)); High temperature resistance: Continuous use temperature -40°C to +100°C (short-term temperature resistance 120°C).
(3) Anti-static modification principle
Anti-static MC501 R6 Sheet adds conductive filler (main system carbon black) to the MC nylon matrix to build a "conductive network" to reduce resistivity:
The role of carbon black: Carbon black particles (particle size 20-50 nm) have high specific surface area and electronic conductivity. When the dispersion concentration in the nylon matrix reaches the critical threshold (about 15%-20% mass fraction), the particles form a continuous conductive path through contact or tunnel effect, which allows static charge to be quickly discharged (surface resistivity is reduced from >10¹³ Ω to 10⁵-10⁹ Ω);
Precise control of R6 model: By optimizing the carbon black type (such as acetylene carbon black or furnace carbon black), dispersion process (such as high-speed stirring + twin-screw mixing) and substrate crystallinity control, the resistance value is ensured to be stable at 10⁵-10⁹ Ω (surface resistance) / 10⁴-10⁸ Ω (volume resistance) range, and the resistance fluctuation is less than 10% after long-term use (such as more than 10 years).
Application Areas
Electronic Semiconductors and Precision Manufacturing
Chip Packaging and Testing: Used in wafer carriers and electrostatic sensitive device (ESD) operating table panels, with a stable resistance of 10⁶-10⁸ Ω to prevent electrostatic breakdown of chips.
Optical Instrument Anti-Vibration Pads: Highly rigid MC501 R6 Sheets are used as microscope stage pads and laser mounting bases, offering wear resistance, anti-static properties, and dust absorption (suitable for cleanroom environments).
Petrochemicals and Hazardous Chemical Storage
Explosion-Proof Equipment Components: Used as sealing gaskets for manhole covers of oil storage tanks and static jumpers for chemical pipelines, with a resistance of less than 10⁹ Ω to prevent static sparks from igniting flammable gases.
Hazardous Chemical Transport Containers: Used as static conductive plates on chemical storage tanks (such as strong acid/alkali storage tanks) and loading and unloading platforms, withstanding corrosive media (such as sulfuric acid and sodium hydroxide solutions).
Automotive and Rail Transit
Automotive Electronic Component Brackets: Used in new energy vehicle battery management system housings and sensor mounts, providing anti-static protection for precision electronic circuits.
Rail Transit Signaling Equipment: Linings for subway signal control cabinets and pads for high-speed rail overhead line maintenance platforms, offering vibration resistance and static conductivity.
New Energy and Aerospace
Lithium Battery Production Tooling: Used in electrode winding machine guide rollers and battery cell packaging molds to prevent static damage to battery separators.
Satellite Component Shock Absorbers: Lightweight MC501 R6 Sheet (density 1.14-1.15 g/cm³) is used as a shock-absorbing layer for spacecraft solar panel brackets, offering radiation resistance, static conductivity, and resistance to space dust absorption.