Polymer Composite Material

SWCNT modified polymer composite, integrated structural reinforcement, high toughness, permanent antistatic & electrostatic shielding performance

Conventional polymer composites usually face bottlenecks: fiber reinforcement often sacrifices ductility and becomes brittle; carbon black or small-molecule antistatic additives tend to degrade tensile and impact performance. Antistatic function fades over time and heavily relies on ambient humidity. It is difficult to combine structural load-bearing, static dissipation and electromagnetic shielding in one material.

Our solution adopts single-walled carbon nanotubes (SWCNT) as nano reinforcing & functional filler, compatible with thermoplastic and thermoset resin systems, including epoxy, PP, PA, PC, PU, fluororesin, FRP, etc. At ultra-low loading, uniformly dispersed SWCNTs build a continuous 3D nano network inside polymer matrix, simultaneously improving tensile strength, modulus and impact toughness, delivering permanent antistatic property and tunable electrostatic shielding efficiency. Mechanical reinforcement and electromagnetic function can be achieved together without trade-off.

Core Advantages

✅ Structural reinforcement, balanced strength and toughness Different from brittleness caused by traditional fiber filling, SWCNT realizes load transfer and crack bridging, raising tensile strength, flexural modulus and impact resistance at the same time.
✅ Permanent antistatic, humidity-independent, non-blooming Interconnected conductive network dissipates static charge stably throughout service life, no migration or blooming contamination like small-molecule antistatic agents.
✅ Tunable EMI & electrostatic shielding Customizable performance from ESD static dissipation level to moderate electromagnetic shielding grade for electronic protection and explosion-proof applications.
✅ Ultra-low loading, well-preserved substrate properties Minimal SWCNT dosage brings limited impact on original chemical resistance, melt flow and colorability. Transparent and light-color functional parts are available, not limited to black as carbon black.
✅ Wide forming compatibility Works with injection molding, extrusion, compression molding, pultrusion, RTM, vacuum infusion, 3D printing and other mainstream composite manufacturing processes, low upgrade cost for existing lines.
✅ Consistent batch performance Pre-dispersed SWCNT masterbatch / slurry solves nano agglomeration issue, stable mechanical, resistivity and shielding performance batch by batch.

Item	SWCNT Reinforced Polymer Composite	Polymer Composite Filled with Carbon Black / Small Molecule Antistatic Agent
Filler Loading	Ultra-low: 0.02–0.3wt%	Carbon black: 5–15wt%; Small molecule antistatic agent: 2–8wt%
Strength & Toughness	Improved strength with retained toughness, low brittleness	High carbon black loading sharply reduces impact resistance, material turns brittle
Antistatic Durability	Permanent, humidity independent	Small molecule additive fails easily; carbon black tends to uneven conductivity
Electrostatic Shielding	Tunable shielding efficiency	Only available at high filling rate with heavy mechanical loss
Color Option	Transparent, light color, tinted mostly available	Limited to black for carbon black formula
Melt Processability	Minor influence on melt viscosity	High carbon black loading increases viscosity and processing difficulty

Technical Principle

Single-walled carbon nanotubes feature ultra-high aspect ratio, superior strength and intrinsic 1D conductive structure. After surface functionalization, SWCNTs disperse uniformly inside polymer matrix. Under external load, nanotubes transfer load, bridge cracks and absorb impact energy for reinforcement and toughening. Interconnected nanotube pathways enable static dissipation and electromagnetic wave attenuation to realize antistatic and electrostatic shielding. It is a true structural-functional integrated composite modification.

Application Fields

Semiconductor & Electronics: ESD packaging, cleanroom fixtures, PCB carriers, EMI shielding housings
Chemical & Explosion-proof: FRP pipes, tanks, gratings, valve components for ATEX hazardous zones
New Energy: Battery module enclosures, energy storage structural parts, high-voltage ESD components
Automotive & Rail Transit: Lightweight functional structural parts, antistatic interior components, lightning strike protection composites
Aerospace: Lightweight load-bearing skin, ESD / EMI shielding composite structures
3D Printing: Conductive reinforced 3D printing filaments & functional printed parts

Spec & Delivery

Optional Resin Matrix: PP, PA, PC, PPS, Epoxy, PU, Vinyl Ester, Unsaturated Polyester, etc.
SWCNT Form: Pre-dispersed masterbatch, nano dispersion slurry, custom powder package
Custom Grade: High-strength toughened grade, ESD antistatic grade, electrostatic shielding grade (combined formula available)
Processing Route: Injection, extrusion, compression molding, pultrusion, vacuum infusion, 3D printing
Service: Sample formulation trial → process tuning → mass supply. Third-party test reports (tensile, impact, surface resistivity, shielding effectiveness) available.

Value Proposition

Integrated material upgrade: One formulation meets structural reinforcement, ESD protection and EMI shielding requirements, cuts design cost of multi-material stacking
Higher reliability: Stable permanent conductivity without blooming contamination, ideal for precision electronics and explosion-proof scenarios
Greater design freedom: Light-color & tinted functional composite, break the black limitation of carbon black systems
Production-friendly: Low filler loading, minor viscosity shift, no large reconstruction for existing equipment