| HS Code | 156675 |
| Material | Ethylene Vinyl Acetate (EVA) |
| Flame Retardancy | High |
| Smoke Emission | Low |
| Halogen Content | Zero |
| Typical Color | Natural or customizable |
| Density | 0.95-1.10 g/cm3 |
| Tensile Strength | 8-13 MPa |
| Elongation At Break | 200-400% |
| Operating Temperature Range | -40 to +90°C |
| Electrical Insulation | Excellent |
| Chemical Resistance | Good against acids, bases, and salts |
| Water Absorption | Low |
| Uv Resistance | Moderate |
| Processing Techniques | Extrusion, molding |
| Application | Cable insulation and sheathing |
As an accredited EVA Low-Smoke Zero-Halogen (LSZH) Grade factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | EVA Low-Smoke Zero-Halogen (LSZH) Grade is packed in 25 kg moisture-resistant, sealed PE bags with clear labeling for safety. |
| Container Loading (20′ FCL) | Container Loading (20′ FCL) for EVA Low-Smoke Zero-Halogen (LSZH) Grade: Typically loads about 16-18 metric tons packed in 25kg bags. |
| Shipping | Shipping of EVA Low-Smoke Zero-Halogen (LSZH) Grade material is typically conducted in sealed, moisture-proof bags or containers to prevent contamination and degradation. Material should be transported in a cool, dry environment, avoiding direct sunlight and extreme temperatures. Handle with care, following all relevant hazardous material and environmental safety regulations. |
| Storage | EVA Low-Smoke Zero-Halogen (LSZH) Grade should be stored in a cool, dry, and well-ventilated area, away from direct sunlight, heat sources, and moisture. Keep the material in tightly sealed, labeled containers to prevent contamination. Avoid exposure to strong oxidizing agents, acids, or open flames. Ensure proper stacking to prevent damage and easily track inventory. |
| Shelf Life | EVA Low-Smoke Zero-Halogen (LSZH) Grade typically has a shelf life of 12 months if stored in cool, dry conditions. |
As a producer of EVA LSZH grade, we specialize in compounding this raw material for downstream industrial partners with strict safety, environmental, and regulatory needs. Designed for low smoke emission and halogen-free performance, this grade addresses requirements in advanced cable insulation, transit system wiring, automotive wiring harnesses, solar photovoltaic modules, and data center interconnection applications. Below we detail major downstream usage sectors, process details, compliance requirements, and typical product formulations.
Municipal and building wire manufacturers use our LSZH EVA in insulation and jacketing compounds for power and data cables in subterranean, public area, and high-rise construction. Formulators incorporate this material to reduce toxic gas emissions and support emergency evacuation in case of fire, especially in confined or densely occupied spaces. Our EVA grade meets required mechanical flexibility and electrical resistivity after compounding with mineral fillers and antioxidants. Processors employ precision blending and extrusion to achieve consistent insulation thickness and fire performance with reliable cable yield and downstream processability.
Industry compliance standards
Typical usage ratio
Downstream process integration
Final product types
Manufacturers in the rolling stock sector specify our LSZH EVA grade for sheathing and skinning compounds in the internal wiring of metro trains, trams, and high-speed rail cars. This material enables compliance with international transport fire safety protocols, controlling toxic emissions and enabling clear evacuation routes in tunnel and train environment fire scenarios. Partners use our product to balance abrasion, flexural fatigue resistance, and long-term thermal stability during repeated operation and maintenance cycles. The processing window fits conventional thermoplastic extrusion lines, minimizing retrofit cost at the manufacturer’s plant.
Industry compliance standards
Typical usage ratio
Downstream process integration
Final product types
Tier-1 and OEM partners in the automotive sector utilize LSZH EVA-based compounds for wire harnesses in electric and hybrid vehicles. The primary application emphasizes reduced halogen content in under-hood and passenger area wiring, directly addressing stricter vehicle cabin air quality ordinances and end-of-life recyclability targets. Our proprietary resin supports consistent color dispersion, high flexibility, and durable flame resistance even in complex harness architectures. Downstream converters value the stable extrusion behavior and compatibility with rapid, automated wire stripping equipment.
Industry compliance standards
Typical usage ratio
Downstream process integration
Final product types
The solar PV sector demands halogen-free, low smoke materials for fixed wiring and junction box components in residential, commercial, and utility-scale arrays. Module manufacturers rely on our LSZH EVA resin for junction box potting compounds and insulation layers because of its electrical insulation properties under outdoor climate extremes and resistance to UV and moisture aging. Our high-purity grade accommodates the addition of specialty stabilizers and flame retardants to match global PV application standards. Downstream partners benefit from consistent melt flow during injection or transfer molding for complex encapsulation geometries.
Industry compliance standards
Typical usage ratio
Downstream process integration
Final product types
Data center construction and critical IT infrastructure require low-emission insulation and jacketing materials for power, network, and fiber optic cables installed in plenums, ducts, and raised floors. Our LSZH EVA supplies reduced-risk performance during fire events, limits opacity, and mitigates toxic exposure potential for high-occupancy facilities, supporting both green building and local safety mandates. Integrators rely on our stable melt flow and low gel content for defect-free cable extrusion lines and precision diameter control over kilometers of cable lengths.
Industry compliance standards
Typical usage ratio
Downstream process integration
Final product types
Competitive EVA Low-Smoke Zero-Halogen (LSZH) Grade prices that fit your budget—flexible terms and customized quotes for every order.
For samples, pricing, or more information, please contact us at +8615365186327 or mail to sales3@liwei-chem.com.
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Tel: +8615365186327
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Working in chemical manufacturing for decades, we've seen safety standards and environmental demands drive huge shifts across industries. Years ago, cable compounds often centered on halogenated materials, pushed by priorities like mechanical toughness and fire resistance. As cable fires in tight spaces caused health scares, stricter rules on smoke density and acid gas emission entered the scene. Our Low-Smoke Zero-Halogen (LSZH) EVA compound grew directly out of these challenges. We set out to deliver low emission performance without cutting corners on processing or reliability, using experience from years inside the compounding line—refining processes, testing results, and hearing from cable makers facing new rules.
LSZH EVA compounds transform the way cable jackets and insulation perform under fire. In a typical cable fire, halogenated materials spit out thick, acrid smoke and corrosive gases. Train tunnels, offshore rigs, underground subways, modern offices—anywhere space gets tight and ventilation struggles, toxic smoke and acid matter far more than burning wire alone.
Our LSZH EVA doesn’t just cut out halogens; it produces far less smoke and barely any corrosive gases. That’s not a side effect. It comes from careful raw material selection and process control. No chlorine, no bromine. Lab data confirm the real-world results: smoke density scores drop far below old PVC formulas, and acid gas release sits almost at trace levels. Every batch runs through full-scale burning chamber checks—not just figure-sheet numbers, but true tests at the kind of heat cables face in grid fires or equipment shorts.
We developed several LSZH EVA models tuned for key cable applications. For example, our model LH285X balances flexibility and toughness in sheathing lines where lines pull fast and product finishes need clean surfaces. For insulation, model LH2290 offers a softer melt flow profile, helping maintain even coating and tight tolerance across thin wall and fiber optic lines. All models share the core low-smoke, zero-halogen backbone, yet we adjust molecular weights, VA content, and antioxidant packages based on melting behavior, processing speed, and downstream extruder specs.
In real production, it never just comes down to a test sheet. Sheathing a robot cable can wreck consistency if the compound scorches or plugs nozzles mid-run. Our LSZH EVA models show smooth, stable melts with very low plate-out. The trick is mixing the right base resin, precisely controlling additive ratios, and using automated blending:
No halogens mean no release of hydrochloric or hydrobromic acids once burning starts; we test gas emissions with real cable mockups. Lab burns at 800–900°C mimic arc failures and cable tray accidents, with continuous monitoring for both opacity and gas pH.
Cable and wire manufacturers started switching to LSZH compounds as metro tunnels, hospitals, and high-occupancy buildings changed fire codes. Standards like IEC 60754, IEC 61034, and UL 2885 specify acid gas and smoke generation. Some regions mandate LSZH for transit, telecom, and military applications.
What drives this change in the field? In fire incidents, cable jackets that used halogenated compounds filled control rooms and train carriages with choking black smoke. Cleanup workers and rescue teams faced metallic corrosion on switchgear and emergency lighting failures, all triggered by acid vapors.
With EVA LSZH, the story plays out differently. Smoke clears faster. Exit routes stay more visible. After a fire, equipment keeps its integrity longer due to much lower corrosion. One subway extension job specified only zero-halogen jackets after previous switchgear failures: faced with a handful of competing compounds, their cable plant chose our EVA LSZH because it delivered the same easy extrusion as their old PVC formulas, skipped the strict ventilation rules for halogens, and consistently held up in rough pull tests.
Halogenated compounds often run warm, sometimes charring if screw speeds drift. Old halogen-free recipes had a nasty habit of jamming filters and foaming at lower temps, making plant managers wary of switching. We built our LSZH EVA with real-world cable lines in mind:
Over time, we’ve run full-week trials on multi-color sheathing lines, measuring downtime and finished product gloss. Customers found that switching from old PVC or PE/halogen flame retardants to our LSZH EVA added no headaches to changeovers. It saves on cleaning cycles and cuts odor complaints from line staff.
Current regulations force many hands, but sustainability expectations run higher each year. We source EVA and main flame retardant loads from suppliers with traceable CO2 profiles and compliance to local pollution standards. The zero-halogen design means incineration or unplanned burning leaves behind dramatically less persistent environmental pollutants compared to PVC or other legacy halogenated compounds.
Waste handling stands simpler: plant scrap can go for non-critical molded goods, as there’s no risk of chlorinated dioxins or brominated furans fouling the recycling stream. Municipal solid waste managers and cable plant buyers both look for these cleaner end-of-life advantages.
Though recycled content in specialty grades still faces technical barriers, research already pushes us ahead: our team works with academic partners, looking at how to reincorporate post-industrial clean scrap in new runs. Additive packages always get reviewed for RoHS and REACH compliance, so end customers in the EU or North America skip complex import paperwork.
The biggest difference between LSZH EVA and legacy PVC lies in fire behavior. PVC wins points for price and ease, but in fire it produces thick, corrosive smoke. Halogenated PE blends sometimes showed improved flexibility, but they never really solved the acid gas problem.
LSZH EVA compounds cut both smoke and acid release. Their oxygen index numbers run on par or above old halogen flame-retardant compounds. Some PE-based zero-halogen systems struggle to match EVA’s mechanical toughness and melt processability, especially for tight-tolerance applications. Alkali metals, widely used as flame retardants for halogen-free PE, can provoke conductor corrosion or leave sticky residues—problems that EVA systems designed for cables skillfully avoid.
From the plant’s perspective, LSZH EVA simplifies logistics. One compound suits both principal cable jackets and internal fillers, so orders come in larger, more manageable lots, and inventory risks drop. Batch-to-batch color drift stays controlled due to the unified compounding base, saving rework time on multi-color jobs.
On a set of metro project cables, the difference in end-of-life cleanup came up in a big way—old halogenated jackets required specialized acidic scrubbing post-fire, while EVA LSZH left a neutral ash, cutting both cleanup time and downstream equipment corrosion.
Underground rails, offshore wind farms, aerospace harnesses—cables in these places can’t afford to fail or become hazardous during a crisis. EVA LSZH grades often close the gap between cost and critical safety.
In substation upgrades, maintenance teams pushed for LSZH jacket materials after corrosive fire residue disabled relay racks for months. Field reports after a switch show tight jacket adhesion, no split-outs during dragging or bending, and improved fire suppression. High humidity trials confirm limited moisture absorption compared to other zero-halogen compounds, which can swell and cause insulation bubbles.
Marine applications demand toughness, salt tolerance, and minimal environmental contamination. Hybrid jackets with EVA LSZH materials passed routine salt spray and hyperbaric tests, showing superior insulation resistance under wet cycling. It helps cut the risk of costly retrofit or early cable pullout on wind platforms or ROV tether lines.
Handling compounds day in, day out, plant crews value materials that don’t off-gas foul odors or require excessive PPE. LSZH EVA formulas operate with the same standard safety protocols as polyethylene and EVA elastomer lines, with no airborne halogen risk even during process upsets. Spill cleanup remains uncomplicated—floor sweeps and disposal repeat procedures used for other thermoplastic compounds, without generating hazardous waste.
Rolling out LSZH materials let some partners cut their on-site halogen monitoring programs, reducing both regulatory exposure and operational complexity. The shift also meant lower workplace grievances about skin irritation compared with some legacy brominated systems.
No compound fits every job. LSZH EVA tends toward higher cost per kilo than commodity PVC. Some applications that chase extreme abrasion resistance or high voltage insulation still lean towards premium XLPE or fluoroelastomer jackets.
Flame retardancy at thinner cross-sections sometimes challenges design; EVA’s rubbery backbone helps, but fire codes may require thicker walls in flat ribbon or micro-coax lines. Electrical professionals balancing cost and benefit often combine EVA LSZH jackets with specialty fillers or cross-linked insulation for top performance in harsh circuits.
Thermal aging resistance reaches adequate levels for most commercial jacket thicknesses, although specialty high-heat cycle environments can see color drift and gloss loss after extended high temperature exposure. We continue to tweak stabilizer loads and investigate novel antioxidant blends to push lifetime ratings higher.
For plants aiming at the very lowest VOC emissions, the compound already trails most halogenated lines—yet we periodically adjust process variables based on air sampling feedback, aiming to create even cleaner shop air for teams working 12-hour shifts.
Demand for LSZH cable products shows no sign of slowing. Railway expansions across Asia and the Middle East, new hospital sites in city cores, datacenters packed with bundled fiber links—everywhere, spec writers and code inspectors select LSZH jacket and insulation requirements by default.
Innovation shifts too: 5G installations demand cables with both excellent electromagnetic shielding and zero-toxin labeling for indoor runs. Renewable energy projects use long cable runs in remote, exposed environments, where clean end-of-life and low-smoke behavior can minimize both insurance and environmental risk.
We see opportunities for LSZH EVA grades to reach into composite hybrid conductors, bundled micro-cable assemblies, and specialty robotics lines. Recent formulations bring antistatic performance, color stability, and improved oil resistance for specialized builds. Each improvement gets developed with direct feedback from our cable production partners, and each production campaign pushes us to refine both melt behavior and supply accuracy.
Manufacturing chemicals for the wire and cable sector means more than shipping out a drum or two and waiting for orders. Over years of machine-side troubleshooting and line start-ups, we support our customers through the daily grind—processing runs, color match, downtime assessment. We respond fast to technical hitches: plant team says the extruder runs hot at the die, we hop on a call, examine logs, and troubleshoot together.
This partnership approach lets us shape LSZH EVA that not only fits tough regulations, but also earns respect from cable crew leaders who care about uptime, safety, and customer reputation. We train technical staff in real-world conditions: rebooting lines, switching colors, managing clean-outs between materials—always with safety and plant efficiency as top priorities.
Our job doesn’t end with a material that looks good on test reports or product sheets. Each batch, each new model gets field-tested, sometimes in tough conditions, sometimes with less-than-ideal machinery. We learn from failures and near-misses, fine-tuning formulas and process windows, always aiming to push performance without introducing new risks to either workers or end-users.
The chemical pathway from old-school halogenated cable jackets to today’s LSZH EVA compounds reflects both scientific progress and how much manufacturing culture adapts to higher standards. As cable plants confront new codes, new types of power and telecom distribution, and tighter efficiency targets, supporting that transition means more than swapping out ingredients. It takes experience with the practical roadblocks—extruder fouling, field installation snags, changing regulations, and mounting environmental expectations.
Each kilogram of LSZH EVA compound we supply stands as the result of years of investment in chemistry, practical production knowledge, testing, and field feedback. From raw pellet to buried cable, safer cabins, tunnels, offices, and machinery are built on choices made in the compounding plant. Cleaner air, better flame resistance, lower cleanup costs, and greater confidence for both cable makers and end-users—that’s the promise and challenge of LSZH EVA in today’s evolving world.
