Conductive Plastic Masterbatch

Low loading dosage, stable resistivity, no blooming, well-preserved mechanical properties of base resin

Traditional conductive systems based on carbon black and acetylene black are plagued by long-standing pain points: high loading dosage, easy blooming and precipitation, surface powder shedding, attenuation of impact and flow properties, resistivity drift and insufficient shielding effectiveness. This solution adopts single-walled carbon nanotube (SWCNT) technology with a three-dimensional network structure of ultra-high aspect ratio for conductivity. It is pre-dispersed and pelletized into standardized masterbatch, which can directly replace carbon black and acetylene black. It endows thermoplastics with triple capabilities including permanent ESD antistatic property, controllable conductivity and broadband electromagnetic shielding. Compatible with conventional processing technologies such as injection molding, extrusion, film blowing and sheet forming, it greatly lowers the threshold of formula debugging.

1.Core Advantages of the Solution｜Why Choose SWCNT Masterbatch to Replace Carbon Black & Acetylene Black

✅ Ultra-low percolation threshold, much lower loading dosage than carbon black/acetylene black A continuous conductive network can be constructed with a final addition dosage of only 0.1–0.5 wt%. Compared with carbon black schemes with high filling dosage of 8–20%, less filler is occupied. The toughness, impact resistance, fluidity and gloss of the base resin itself can be retained, avoiding brittleness and die head clogging.

✅ Permanent and stable conductive & antistatic performance, no significant resistivity drift The conductive network is formed by interlocked nanotubes, and the conductivity does not rely on environmental humidity, different from the time-dependent attenuation of ordinary antistatic agents. The surface/volume resistivity range is controllable (10³ ~10¹¹ Ω/sq). Formulas for ESD antistatic zone grade, conductive grade and shielding grade can all be customized with excellent batch consistency.

✅ Integrated high-efficiency EMI electromagnetic shielding Single-walled carbon nanotubes feature both conductive loss and dielectric loss. A continuous conductive network is formed inside the plastic substrate to realize broadband electromagnetic wave shielding via absorption and reflection. It meets the shielding requirements of high-frequency electronic devices and communication module housings, without additional metal plating or metal fiber lamination.

✅ No precipitation, no carbon powder shedding, clean surface It solves the most common problems of carbon black and acetylene black such as blooming, surface black floating and powder shedding caused by friction which contaminates chips, PCBs and optical components. Suitable for clean workshops, semiconductor packaging and precision electronic parts.

✅ Wide substrate adaptability and processing-friendly Optional carrier resins including PP / ABS / PC / PA / TPU / PET and other mainstream resins. Compatible with existing extrusion and injection molding production lines without equipment modification for direct blending. It features good dispersibility and avoids white spots caused by agglomeration.

✅ Lightweight and greater coloring flexibility Low filling density makes finished products lighter; low carbon loading supports the development of light-colored and colored ESD products, breaking the limitation that traditional carbon black systems can only produce dark/black products.

Performance Item SWCNT Masterbatch Traditional Carbon Black / Acetylene Black

Effective Loading Dosage 0.1–0.5% 8–20%

Resistivity Stability Humidity-insensitive, long-term stable Susceptible to moisture, prone to long-term drift

Surface Condition No powder shedding, no precipitation Easy to float black, sheds carbon when rubbed

Mechanical Property Retention Good retention of substrate impact resistance and toughness Becomes brittle and MFI drops after high filling

EMI Shielding Capacity Medium to high shielding effectiveness Low shielding, only basic conductivity

Color Matching Capability Supports colored / light-colored products Basically limited to black

Performance Item	SWCNT Masterbatch	Traditional Carbon Black / Acetylene Black
Effective Loading Dosage	0.1–0.5%	8–20%
Resistivity Stability	Humidity-insensitive, long-term stable	Susceptible to moisture, prone to long-term drift
Surface Condition	No powder shedding, no precipitation	Easy to float black, sheds carbon when rubbed
Mechanical Property Retention	Good retention of substrate impact resistance and toughness	Becomes brittle and MFI drops after high filling
EMI Shielding Capacity	Medium to high shielding effectiveness	Low shielding, only basic conductivity
Color Matching Capability	Supports colored / light-colored products	Basically limited to black

Technical Principle｜Solution Principle

Single-walled carbon nanotubes (SWCNT) feature ultra-high aspect ratio. After being uniformly dispersed in the polymer matrix, the nanotubes interweave to form a continuous 3D conductive network. Single-walled carbon nanotubes have an ultra-high aspect ratio. After uniform dispersion in the plastic matrix, they overlap with each other to form a three-dimensional conductive network running through the whole material. Charges can be quickly conducted and dissipated along the network to achieve antistatic effect. Electromagnetic shielding is realized through the electromagnetic wave attenuation mechanism. We adopt the pre-dispersed masterbatch process to solve the agglomeration problem of SWCNT powder in advance. Customers can blend it directly, avoiding risks such as dust emission and uneven dispersion caused by powder feeding.

Typical Application Scenarios｜Application Fields

Semiconductor & Microelectronics: IC trays, chip carrier tapes, wafer turnover boxes, antistatic packaging, material boxes
Consumer & Communication Electronics: 5G/RF device housings, connectors, shielding structural parts, antistatic shells
New Energy: Energy storage battery housings, wiring harness insulating shielding parts, explosion-proof and antistatic components
Industrial Explosion-Proof: Antistatic extruded pipes, plates, pump and valve plastic parts for coal mine, chemical industry, oil & gas industries
Automation & Testing: ESD workbench panels, turnover jigs, conveying guide rails, thermoformed trays
Packaging Industry: Antistatic blown films, antistatic sheets, high-shielding packaging film substrates

Product Specifications & Delivery｜Spec & Delivery

Form: Cylindrical pellet masterbatch, dust-free packaging
SWCNT Loading: Customizable concentrated grades (high-concentration pre-dispersed masterbatch for dilution)
Carrier Resin: PP, ABS, PC, PC/ABS, PA6/PA66, TPU, PET, etc.
Customizable Resistivity Grade: Antistatic grade / Conductive grade / EMI shielding grade
Process Adaptation: Injection molding, extrusion, blow molding, cast sheet, wire drawing
Delivery Support: Sample test → Formula support → Mass supply; test reports (surface resistance, volume resistance, shielding effectiveness, mechanical data) are available

Customer Value｜Value Proposition

Formula Upgrade: Directly replace original carbon black and acetylene black formulas, upgrade material performance and reduce trial-and-error costs
Yield Improvement: Eliminate contamination of precision components by shedding powder, and reduce defects caused by electrostatic breakdown and electromagnetic interference
Product Differentiation: Colored antistatic, lightweight and high-shielding plastic parts to build product competitiveness
Stable Supply Chain: Standardized masterbatch supply with stable batches and reduced quality fluctuation risks of conductive fillers