High-performance duct liners and elastomeric pipes optimized for airborne noise damping and structural vibration attenuation in commercial HVAC networks.
Closed-cell thermal and acoustic conduit lining.
Pre-applied adhesive backing for rapid installation.
Ultra-reliable cooling system sweat prevention.
High density elastomeric sheets for sound barriers.
Acoustic-thermal barrier with minimal lambda value.
In modern commercial construction and industrial design, HVAC systems are the primary contributors to ambient indoor noise. Air turbulence, fan rotation, structural duct wall vibration, and cross-talk between spaces generate a composite acoustic disturbance profile. High-performance air duct sound dampening systems target two core components of this noise: airborne noise (sound traveling directly through the airstream) and structure-borne noise (vibrations traveling along sheet metal ductwork).
By utilizing flexible, high-density elastomeric rubber foam (NBR/PVC) with a closed-cell structural grid, engineers can effectively decouple structural acoustic loops. Closed-cell rubber foam provides a unique damping mechanism: the elastomeric matrix absorbs kinetic energy from sound waves, converting acoustic energy into micro-thermal energy through viscoelastic dissipation. Unlike fibrous alternatives like fiberglass or rock wool, closed-cell structures do not shed particles into the air path, preventing air-quality deterioration and respiratory hazards.
Kingflex Insulation Co., Ltd. represents a premiere manufacturing and trading integration group specialized in engineering advanced thermal and acoustic insulation solutions. Strategically situated in Dacheng, China—historically recognized as the capital of green-building materials—our enterprise centers on research and development, smart manufacturing, and global technical supply chains.
Operating with a foundational philosophy centered on energy-saving, consumption reduction, and acoustic optimization, Kingflex provides systemic, end-to-end guidance. We offer everything from raw material design, density optimization, continuous extrusion molding, to expert post-sale installation supervision.
Established under the parent umbrella of the Jinwei Group, which possesses over 40 years of manufacturing history since its founding in 1979, Kingflex inherits a pioneering industrial legacy. Jinwei Group was the first manufacturer of thermal insulation materials north of the Yangtze River, paving the way for China's modern eco-friendly insulation sector.
Kingflex Advanced Production Workshop & Automated Lines
A great enterprise is defined by its collaborative talent pool. Kingflex boasts a tightly integrated technical team aligned under a singular vision: delivering first-class engineered insulation solutions. Our workforce is structurally optimized for complex, large-scale custom project fulfillment:
Developing next-generation elastomeric polymer blends, fire-retardant chemistries, and low-frequency dampening materials.
Facilitating seamless logistics, localized compliance clearances, and responsive customer service globally.
Manning advanced computerized extrusion, curing, and foaming lines in strict shifts to maintain consistent output quality.
Through decades of industrial expansion, our operational structures have evolved from standard extrusion lines to highly sophisticated, telemetry-tracked smart plants. By controlling the formulation ratio of raw polymers, plastifying agents, foaming accelerants, and fire inhibitors, Kingflex ensures that every batch maintains structural homogeneity. This structural uniformity guarantees predictable acoustic insertion loss and thermal performance across diverse architectural conditions.
To ensure complete alignment with design requirements for international projects, Kingflex maintains strict tolerances and dimensional standardized guidelines for both sheet rolls and pipe sections.
| Characteristic / Property | NBR/PVC Elastomeric Foam Value | Test Standard Reference |
|---|---|---|
| Thermal Conductivity (λ) | ≤ 0.034 W/(m·k) at 0°C | ASTM C518 / ISO 8301 |
| Moisture Resistance Factor (μ) | ≥ 10,000 (Closed-cell barrier) | BS EN 12086 |
| Service Temperature Range | -40°C to 105°C | ASTM C534 |
| Density Profile | 40 - 55 kg/m³ | ASTM D1622 |
| Fire Safety Rating | Class 0 / Class 1, Flame retardant | BS 476 Part 6 & 7 / UL 94 V-0 |
| Compression Resilience | Over 80% recovery rate | GB/T 6669 |
| Thickness (mm) | Standard Width (mm) | Core Applications |
|---|---|---|
| 6mm - 10mm | 1000 / 1200 / 1500 | Small commercial air ducts, fan coil wraps |
| 13mm - 25mm | 1000 / 1200 / 1500 | Primary air handling unit (AHU) lining, large ducts |
| 30mm - 50mm | 1000 / 1200 | Industrial noise enclosures, high-duty thermal zones |
| ID Range (mm) | Thickness Range (mm) | Core Applications |
|---|---|---|
| 6mm - 25mm | 9mm - 30mm | Refrigerant copper piping, split systems |
| 28mm - 60mm | 9mm - 40mm | Condensation control, water distribution |
| 67mm - 114mm | 15mm - 40mm | Chilled water systems, heavy process pipes |
Sound dampening and thermal preservation cannot exist in a vacuum; they must satisfy the dynamic environmental loads of localized industries. Kingflex solutions target key macroeconomic and engineering applications:
Prevents condensation by maintaining system surface temperature above ambient dew point. Attenuates air shear and fan motor hum from transferring through sheet metal surfaces.
Applied in hotels, hospitals, and shopping centers. Solves acoustic "cross-talk" where sound transfers between adjoining hotel rooms through shared branch ducting.
Specialized ultra-low temperature formulations prevent system embrittlement and catastrophic thermal shock in LNG pipelines and deep-freeze logistics.
At present, Kingflex operates 5 large automatic assembly lines, generating an annual production capacity of more than 600,000 cubic meters. This immense production scale has solidified Kingflex's role as a designated strategic supply enterprise for the Ministry of Energy, the Ministry of Electric Power, and the Ministry of Chemical Industry.
China's smart manufacturing infrastructure (Factory 4.0) provides a major competitive edge in thermal and acoustic insulation supply chains. Through continuous telemetry feedback, raw polymer dosing is dynamically balanced against precise microwave preheating zones. This level of automated process monitoring results in a closed-cell density profile that is exceptionally consistent.
As building codes adapt to meet global net-zero targets and dynamic acoustics standards (like WELL Building Standard & LEED v4.1), sound-insulating materials must continuously evolve. Kingflex's engineering team is actively advancing technology along a five-year roadmap focused on material science breakthroughs:
1. Next-Generation Bio-Based Foaming Agents: Transitioning away from traditional blowing chemical agents towards zero-ODP (Ozone Depletion Potential) and ultra-low GWP (Global Warming Potential) compounds.
2. Aerogel-Elastomer Composite Frameworks: Infusing silica aerogel particulate matrices into our standard NBR base. This hybrid structure achieves ultra-low lambda values under 0.026 W/(m·K) while enhancing low-frequency acoustic absorption, effectively blocking low-frequency engine room rumble.
3. Smart Acoustic Impedance Liners: Developing non-homogeneous density gradients across a single sheet. By layering soft micro-cellular structures with high-density outer skins, we can target sound dampening over a wider range of frequencies.
Managing complex international supply chains requires robust documentation, product consistency, and clear tracking mechanisms. To ensure reliability for architects and mechanical designers worldwide, Kingflex maintains standard compliance with global criteria. Our products are exported to over 66 foreign countries and regions across 16 years of continuous export operations.
Our continuous quality system validates batch characteristics to match standards like BS 476, CE, REACH, RoHS, UL94, and ASTM. This ensures hassle-free acceptance by engineering, procurement, and construction (EPC) companies globally.
Kingflex continuously invests in product innovation and testing. Our active R&D facilities utilize precision evaluation equipment to simulate real-world thermal loads, acoustic waves, and mechanical stress profiles.
Providing reliable performance on-site across commercial, industrial, and infrastructure projects worldwide.
From commercial office high-rises to sensitive microelectronics cleanrooms and industrial processing facilities, Kingflex materials are engineered to perform. By delivering consistent thermal protection, preventing condensation build-up, and providing excellent structural sound isolation, our insulation materials help projects meet strict energy codes and acoustics standards.
Kingflex works closely with engineering teams and procurement specialists globally. We maintain transparent communication channels, providing real-time production updates, customized quality tracking, and comprehensive logistics support.
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Request Technical Support DocumentsTechnical answers for engineers, architects, and procurement specialists.
It is primarily designed for HVAC ducts, air conditioning piping networks, building envelope insulation, and industrial pipeline thermal and acoustic insulation. Its elastomeric closed-cell structure absorbs sound waves and prevents condensation on cold system lines.
Yes. Kingflex rubber foam insulation incorporates fire retardants to meet strict fire protection safety codes. It complies with international safety standards for industrial and commercial structures, including BS 476 (Class 0/1) and UL 94 V-0 ratings.
Rubber foam is highly flexible, features a closed-cell structure, and serves as an excellent moisture barrier. It is widely used in HVAC and duct applications where condensation and sound vibration are concerns. Rock wool offers superior high-temperature resistance, making it suitable for high-heat industrial processing pipelines.
Yes. We offer OEM and ODM services to customize thicknesses, interior diameters, and back-applied adhesive configurations to meet specific project needs.
Kingflex products have successfully passed testing to earn BS 476, CE, REACH, RoHS, UL94, and ASTM certifications. This ensures compliance with global construction and environmental standards.
Yes. Every production run is coded with batch numbers, tracking the raw material inputs, processing parameters, and final quality checks. This ensures complete transparency for all projects.
We manufacture a wide range of sheet thicknesses, from 6mm up to 50mm, allowing you to select the ideal option for your thermal and sound-insulating requirements.
When installed correctly and maintained under standard operating conditions, Kingflex insulation products deliver stable performance for a service life of 10 to 15 years.
High-durability insulation designs engineered for heavy industrial piping and extreme low-temperature applications.
Kingflex manufactures a comprehensive selection of thermal, cryogenic, and acoustic insulation products. Review our product categories to find the correct specifications for your projects.
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