Explore our foundational range of closed-cell elastomeric rubber foam sheets, rolls, and pre-formed pipe insulation systems.
Modern ventilation networks demand highly advanced thermal control materials to mitigate structural heat gain and completely prevent system condensation. Standard ventilation frameworks without adequate elastomeric linings are highly susceptible to moisture ingress, which causes mold contamination and deteriorates air quality.
Our engineered NBR/PVC closed-cell rubber foam insulation offers a microstructural cell density that limits thermal conduction to a bare minimum ($\lambda \le 0.034 \text{ W/m·K}$ at $0^\circ\text{C}$). The inherent structural closed-cell matrix (>98%) behaves as an integrated, continuous vapor barrier, meaning that even if the outer layer is physically compromised, moisture cannot penetrate or migrate through the material matrix.
Furthermore, air duct designs insulated with Kingflex elastomeric materials exhibit significant acoustic attenuation. High-frequency structural vibrations generated by duct fans are absorbed and dissipated within the flexible elastomer matrices, lowering ambient noise thresholds across municipal, commercial, and residential spaces.
Delivering high-efficiency global insulation system systems through consistent research, development, and vertical integration.
Kingflex Insulation Co., Ltd. is a professional manufacturing and trading combo for high-performance thermal insulation systems. Located in Dacheng, China—the capital of green-building materials—we concentrate entirely on technical consultation, R&D, structural production, and comprehensive post-sale support.
Established by the Jinwei Group, which dates back to 1979, Kingflex holds over 40 years of pioneering heritage. As the first thermal insulation manufacturer established north of the Yangtze River, we have shaped industry specifications and standards for generations.
We boast a tightly-knit team of 8 dedicated R&D engineers, 6 international sales specialists, and 230 experienced production professionals, working in unison to provide high-quality structural support and bespoke customer service.
Under the core principle of energy-saving and consumption reduction, our team strives to design insulation systems that reduce operating overheads for structures worldwide. Through constant thermal insulation design refinements, Kingflex has successfully gained international prominence, building long-term business partnerships across major construction networks globally.
Whether guiding a complex regional HVAC layout or manufacturing self-adhesive thermal rolls for offshore projects, our team is equipped with the logistical and engineering experience required to ensure your specifications are met on budget and on schedule.
Annual Capacity (m³)
Automatic Assembly Lines
Export Destinations
Industry Heritage
Understanding physical properties allows specifying engineers to make informed materials selections for complex, long-term installations.
Kingflex elastomeric rubber foam presents an incredibly dense closed-cell matrix. The thermal barrier efficiency depends directly on the stability of the trapped air pockets inside these microcells, preventing convective heat flow.
| Parameter Details | Elastomeric NBR/PVC Foam (Kingflex) | Rock Wool Insulation (Traditional) | Polyurethane Foam (PU) |
|---|---|---|---|
| Thermal Conductivity (0°C) | $\le 0.034 \text{ W/m·K}$ | $\approx 0.040 \text{ W/m·K}$ | $\le 0.028 \text{ W/m·K}$ |
| Moisture Absorption Rate | < 0.9% (Continuous Closed-Cell) | High (Requires external vapor barrier) | Moderate (Semi closed-cell) |
| Elastic Resilience | Excellent (>80% rebound) | Poor (Rigid / Fibrous) | Rigid / Non-flexible |
| Operational Temp. Range | -40°C to +105°C | Up to +650°C | -50°C to +90°C |
| Acoustic Isolation | High damping capacity | Excellent high-frequency absorption | Moderate sound reflection |
From commercial high-rises to extreme-temperature industrial cryogenic loops, our products deliver stable long-term performance.
Designed for installation over rectangular and circular air conditioning ductwork. The low thermal conductivity maintains cool or warm temperatures throughout the air distribution network, minimizing thermal losses across long distances.
Specifically engineered for liquid gas terminals and chemical cooling facilities. It remains physically flexible and structurally intact even in sub-zero operational ranges (-40℃ to -196℃ with specialised cryogenic variants).
Acts as an anti-freezing cover for public water supply networks in high-rise complexes. The high moisture barrier prevents condensation drips from damaging drywall and suspended ceiling components.
Kingflex insulation sheets and pre-formed tubes are regularly specified in the design phase of hospitals, data centers, airports, and chemical processing facilities. These environments demand reliable mechanical properties, zero fiber shedding, and strict fire performance compliance. Because NBR/PVC rubber foam emits no loose particulates or fibers during maintenance, it is highly suitable for cleanroom environments and sterile surgical facilities.
With our integrated self-adhesive backing options, installation time is reduced by up to 40% compared to traditional fiberglass or rock wool wraps. The elasticity allows the installer to easily wrap complex elbows, tees, and air dampers without leaving thermal bridge gaps.
At Kingflex, we maintain continuous batch-level control. Our Dacheng manufacturing facility houses 5 fully automated extrusion and foaming lines. Automated control of chemical compounding, temperature curves, and vulcanization times ensures that every batch meets density specifications.
Our dedicated state-level laboratory is equipped with precision testing tools to verify thermal conductivity index ranges, flame propagation rates, smoke densities, and dimensional tolerances. Working closely with regional engineering universities, we actively research next-generation halogen-free foaming agents to further reduce the carbon footprint of structural building materials.
Benefiting from integrated industrial clusters and streamlined shipping logistics to guarantee on-time delivery across five continents.
Located in the heart of China’s green building materials sector, our plant secures immediate, cost-efficient access to raw monomers, vulcanizers, and specialty flame retardants, sheltering our clients from commodity price spikes.
With an annual output exceeding 600,000 cubic meters, Kingflex handles large-scale commercial orders, serving major public works, regional pipeline projects, and massive industrial plant constructions simultaneously.
Our proximity to major northern shipping hubs ensures fast ocean freight services. With direct links to global shipping alliances, we provide stable container rates and predictable shipping timelines.
Standard engineering measurements for physical dimensions, thermal coefficients, and installation limits.
Our high-density rolls are specifically manufactured to line the exterior or interior surfaces of rectangular air distribution networks.
Designed with tight inner diameter tolerances to fit snugly over round copper pipes and steel heating/cooling pipelines.
At Kingflex, safety and performance standards are not optional. Our elastomeric materials are rigorously tested and verified by third-party laboratories to comply with global fire and building codes.
We hold certifications from major international standard bodies including BS 476, CE, REACH, RoHS, UL94, and ASTM. These certificates verify that our insulation solutions can be safely installed in public schools, hospitals, commercial complexes, and chemical facilities without failing fire prevention codes or emitting harmful VOCs.
Each batch of rubber foam is traced by a production serial code, ensuring full batch traceability from raw material compounding to final packaging.
We work closely with global distributors and engineering firms to maintain high quality control standards.
Detailed engineering and commercial answers to help streamline your procurement process.
Engineered pipe runs, halogen-free tubing, and low-temperature elastomeric formulations for critical infrastructure projects.
Kingflex