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Conductive Yarn for ESD Workwear & Cleanroom

Carbon black conductive yarns engineered for ESD garments, semiconductor cleanroom textiles, anti-static filtration systems, automotive interiors, and industrial flooring applications. Surface resistivity 10⁴–10⁸ Ω. Core-sheath and uniform-blend structures available.

Product Types

Conductive Yarn Types by Application

Six yarn subtypes engineered for specific industrial applications. Each type is optimized for resistivity range, mechanical strength, and textile process compatibility.

ESD Workwear Core-Sheath
TY-CS-20D / TY-CS-70D
Core: high carbon-loading PET (≥25 wt%). Sheath: standard PET. Complies with EN 1149-5 for Zone 1/2 environments.
Resistivity10⁵–10⁷ Ω
Tenacity≥2.2 cN/dtex
StructureCore-sheath, 12–70 denier
Cleanroom Low-Particle
TY-CR-40D / TY-CR-100D
Core-sheath structure minimizes carbon black particle shedding. Tested to ISO 14644-1 Class 5 particle emission limits.
Resistivity10⁴–10⁶ Ω
Particle<0.5 particles/ft³
StructureTight core-sheath
Filter Bag Conductive
TY-FB-70D-HT / TY-FB-150D-HT
High-temperature PET or PPS base. Prevents electrostatic ignition in combustible dust filtration systems (ATEX Directive 2014/34/EU).
Temp≤150°C (PET) / ≤190°C (PPS)
Resistivity10³–10⁵ Ω
StructureUniform blend
Carpet & Flooring
TY-CF-200D / TY-CF-500D
High-denier conductive yarn for anti-static carpet and ESD flooring systems. Stripes or grids at 50–100 mm spacing.
Resistivity10⁴–10⁶ Ω
Denier200–500 D
Abrasion≥40,000 cycles
Automotive Interior
TY-AU-70D / TY-AU-140D
PA6 or PA66 base with carbon black. Engineered for seat fabrics and interior textiles in automotive manufacturing.
Resistivity10⁵–10⁷ Ω
Elongation25–40% (PA66)
StructureCore-sheath
Military & Shielding
TY-MI-50D / TY-MI-95D
High-conductivity yarn for electromagnetic shielding in military textiles. Carbon black loaded to maximum percolation (≥30 wt%).
Resistivity<10⁴ Ω
Shielding15–25 dB (0.1–1 GHz)
StructureUniform blend
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Product Definition

What Is Conductive Yarn

Conductive yarn is a textile structure in which conductive particles or filaments are integrated into the yarn body to provide a continuous electrical conduction path along the yarn axis. In carbon black conductive yarns, conductive-grade carbon black (particle size 20–40 nm, DBP absorption >150 mL/100g) is either blended into the polymer matrix before spinning (uniform dispersion type) or confined to the core layer of a sheath-core bicomponent filament (core-sheath type).

The conductive path is formed by the percolation network of carbon black particles. When the carbon black loading exceeds the percolation threshold (typically 15–30 wt% depending on structure and dispersibility), inter-particle contact produces a sudden drop in volume resistivity by 6–10 orders of magnitude.

Unlike topical anti-static treatments that rely on humidity-dependent ionic conduction, carbon black yarns provide permanent conductivity independent of relative humidity, down to ≤30% RH. This is the determining factor for applications in climate-controlled cleanrooms and heated industrial environments.

Technical Data Sheet
Product Category
Carbon Black Conductive Yarn
Base Polymer Options
PET / PA6 / PA66 / PP
Surface Resistivity
10⁴ – 10⁸ Ω (EN 1149-3)
Line Resistance
10² – 10⁵ Ω/cm (varies by denier)
Temperature Range
-40°C – +150°C (PET base)
Wash Durability
≥100 cycles (EN 1149-3, 75°C wash)
Standards Compliance
EN 1149-5 / GB 12011 / ANSI/ESD S20.20


Technical Parameters

Engineering Specification Data

All parameters are measured under standard conditions (23°C, 50% RH) unless otherwise specified. Custom specifications available on request.

ParameterTest MethodUnitTypical RangeRemarks
Surface ResistivityEN 1149-3Ω10⁴ – 10⁸Dependent on carbon loading
Volume ResistivityASTM D991Ω·cm10² – 10⁶Core-sheath: core only
Line ResistanceFour-point probeΩ/cm10² – 10⁵Inversely proportional to denier
Carbon DispersionSEM cross-sectionCV %<15%CV >20%: inadequate
Carbon ContentTGA (600°C)wt%15 – 32%Optimal 20–28% (PET)
Breaking TenacityASTM D2256cN/dtex1.8 – 3.2Sheath determines tenacity
Breaking ElongationASTM D2256%15 – 45PA: higher; PET: lower
Resistivity @ -40°CEN 1149-3ΩWithin 1 orderPTC effect minimal
Resistivity @ +150°CEN 1149-3ΩWithin 2 ordersAbove Tg, resistivity increases
Wash DurabilityEN 1149-3, 75°CResist. change<1 orderCore-sheath: superior
Moisture AbsorptionISO 62wt%0.2 – 0.6%Carbon reduces moisture pickup
Shrinkage @ 180°CASTM D4974%2 – 8%Heat-set: improved stability

Applications

Industrial Application Scenarios

Carbon black conductive yarns are deployed across industries where electrostatic discharge poses operational risk or product quality issues.

01
Explosion-Proof Workwear (ATEX Zones)
Petrochemical, oil & gas, and grain handling facilities require workwear that prevents electrostatic spark ignition. Garment surface resistivity must be ≤10⁸ Ωand charge decay time<2 seconds (EN 1149-3).
EN 1149-5 / ATEX 2014/34/EU / GB 12011
02
Semiconductor & Electronics Cleanroom
ISO Class 3–5 cleanrooms require garments that do not emit particles and dissipate static charge below 100 V. Core-sheath conductive yarns achieve both requirements.
IEC 61340-5-1 / SEMI S8 / ANSI/ESD S20.20
03
Combustible Dust Filtration
Filter bags in cement, coal, grain, and metal powder plants accumulate electrostatic charge. Conductive yarns provide a continuous grounding path to prevent spark generation.
NFPA 654 / EN 13284 / ATEX Directive
04
ESD Flooring & Data Centers
Raised flooring and carpet systems use conductive yarn grids (50–100 mm spacing) to form an equipotential plane. Floor system resistance to ground must be 10⁵–10⁸ Ω.
IEC 61340-5-1 / ANSI/ESD S20.20 / DIN EN 1081
05
Automotive Seat & Interior Fabrics
Synthetic seat fabrics accumulate charge from occupant movement. Conductive yarn integrated into seat covers reduces static to below human perception threshold (~3 kV).
FMVSS 302 / GB 8410 / ISO 17071
06
Medical & Pharmaceutical Cleanroom
GMP-compliant cleanrooms (Grade A/B/C/D per EU GMP Annex 1) require low-shedding anti-static garments. Core-sheath structure prevents carbon particle shedding.
EU GMP Annex 1 / ISO 14644-1 / ISO 15797

Comparison

Conductive Yarn vs. Alternative Technologies

Engineering comparison of conductive yarn technologies for textile anti-static applications.

PropertyCarbon Black YarnStainless Steel YarnSilver-Coated Yarn
Surface Resistivity10⁴ – 10⁸ Ω10² – 10⁴10² – 10⁵
Wash Durability>100 cycles (permanent)Unlimited50–100 (degradation)
Low Humidity (≤30% RH)StableStableStable
Textile ProcessabilityExcellentPoor (high breakage)Good
Tenacity (cN/dtex)1.8 – 3.28 – 151.5 – 2.8
Elongation at Break15 – 45%1 – 3%15 – 35%
Particle SheddingLow / ModerateNoneNone
Color OptionsBlack/dark onlySilver-grey onlyCan be over-dyed
Cost Index1.0 (baseline)1.8 – 2.55.0 – 8.0
FAQ

Procurement & Engineering Questions

Technical answers for procurement engineers and textile technical teams.

What blending ratio is required to achieve EN 1149-5 compliance?
For woven fabrics, a 2–4% blending ratio of conductive yarn (in weight) typically achieves surface resistivity ≤10⁸ Ω/□ and meets EN 1149-5. For knitted fabrics, due to higher loop density, 1–2% blending may be sufficient. Request our Blending Ratio Calculation Sheet for your specific fabric specification.
How does surface resistivity change after repeated industrial washing?
Core-sheath type conductive yarns maintain surface resistivity within ±1 order of magnitude after 100 industrial wash cycles (75°C, ISO 15797 Method 8). Uniform-blend type yarns show ±1.5–2 orders of magnitude change. For >50 wash cycles (workwear rental programs), core-sheath structure is recommended.
Does carbon black conductive yarn perform in low-humidity environments?
Yes. Unlike topical anti-static treatments that rely on ionic conduction, carbon black conduction is through particulate electron transport and is essentially independent of relative humidity. Test data shows resistivity change of <0.5 order of magnitudebetween 20% RH and 80% RH.
What is the difference between core-sheath and uniform-blend conductive yarn?
Core-sheath: Conductive carbon black is confined to the core (80–90% of cross-section). The sheath is pure polymer. Advantages: (1) wash durability, (2) lower particle shedding, (3) consistent resistivity batch-to-batch. Uniform-blend: Carbon black dispersed throughout the entire cross-section. Advantages: (1) Lower manufacturing cost, (2) more uniform conductivity, (3) can achieve lower resistivity. For ESD workwear and cleanroom, core-sheath is preferred.
Can conductive yarn be used in high-temperature filtration applications?
Yes, with polymer selection matched to operating temperature. For continuous operation ≤150°C: PET-base. For ≤190°C: PPS-base. For ≤260°C: PTFE-base (limited conductivity). Important: resistivity increases with temperature (PTC effect). Verify that hot-side resistivity still meets the required specification (typically ≤10⁶ Ω/□).
What certifications and test reports are available?
Per order: (1) Technical Data Sheet (TDS), (2) Certificate of Compliance (COC) per batch, (3) Third-party test report (SGS, TÜV, or CTi) against EN 1149-3 and EN 1149-5, (4) Wash durability report (50/100 cycles), (5) SDS (Safety Data Sheet) per REACH Annex II, (6) REACH & RoHS compliance declaration. For semiconductor cleanroom: particle emission test report (ISO 14644-1 methodology).

Request Technical Documentation

Download data sheets, request samples, or consult our engineering team for custom specifications.

Haining Taierxin New Materials Co., Ltd. is one of the most professional conductive fiber manufacturers and suppliers in China, specialized in providing high quality products. We warmly welcome you to wholesale bulk conductive fiber at competitive price from our factory.

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