Kingflex
An engineering deep-dive into thermodynamics, water-vapor transmission resistance, and polymer mechanics for building designers and procurement directors.
Closed cell flexible elastomeric foam insulation represents the vanguard of modern thermal barrier technology. Synthesized from a cross-linked compound of Nitrile Butadiene Rubber (NBR) and Polyvinyl Chloride (PVC), this material is designed to operate in challenging thermodynamic environments. The polymer matrix is chemically expanded during production using environment-friendly foaming agents that create a dense system of microscopic gas-filled chambers.
The closed-cell configuration exceeds a 98% encapsulation rate. Because the individual cells are completely sealed from one another, they act as miniature dead-air zones. This cellular geometry limits heat transfer by convection and conduction, yielding an exceptionally low thermal conductivity (λ ≤ 0.034 W/m·K at 0°C). The incorporation of PVC provides chemical resistance and structural integrity, while NBR delivers elasticity, high-compression resilience, and low temperature flexibility.
Condensation is the single most critical failure point in cold-pipe insulation systems. When warm, humid air contacts cold surfaces, vapor pressure forces moisture to migrate toward the low-temperature boundary. Once a porous or fibrous material absorbs water, its thermal conductivity climbs exponentially because water conducts heat approximately 24 times faster than dry air.
Our flexible elastomeric foam features a high water vapor diffusion resistance factor (μ-value ≥ 10,000). This means the material naturally opposes moisture migration. Condensation control is achieved without relying on external jackets that are prone to tearing, structural puncture, and degradation. By maintaining dry air pockets, the insulation prevents rust and corrosion under insulation (CUI) on copper, carbon steel, and stainless-steel piping networks.
Safety is paramount in municipal and industrial structures. Kingflex NBR/PVC elastomeric thermal insulation is formulated with advanced fire retardant additives. In the event of a fire, the material reacts by forming a protective char layer, which restricts flame spread and limits heat release.
Kingflex Insulation Co., Ltd. is a premier manufacturing and trading combo specializing in thermal insulation products. Our advanced research, development, and high-efficiency production facilities are located in Dacheng, China—the globally recognized capital of green-building materials.
As an energy-saving and environmentally conscious enterprise, we concentrate on the integration of research, development, high-volume production, and international sales. Taking energy conservation and carbon footprint reduction as our core concept, we deliver global building material solutions from installation design guidance to post-sale support.
Kingflex was established by the Jinwei Group, which boasts a rich heritage of over 40 years. Established in 1979, Jinwei Group was the pioneer manufacturer of thermal insulation materials north of the Yangtze River, establishing standard-setting processes that define modern insulation quality.
Engineered thermal barriers designed for demanding building services and complex processing environments.
Prevent condensation in office towers, commercial centers, and hospitals. High flexibility ensures wrapping around complex duct elbows and fittings, reducing mechanical noise transmission while maximizing thermal performance.
Specifically designed for cryogenic processing plants, cold chain pipelines, and chemical tanks. Operating efficiently down to -40°C, Kingflex cryogenic rubber foam preserves thermal balance and controls thermal shock.
Protects high-temperature process piping in petroleum refineries and chemical plants up to 105°C. With closed-cell structures, the insulation mitigates risk of corrosion under insulation (CUI) from external weather leaks.
At present, Kingflex operates 5 large automatic assembly lines, generating an annual production capacity of more than 600,000 cubic meters. This scale establishes Kingflex as a designated production enterprise authorized by the Ministry of Energy, the Ministry of Electric Power, and the Ministry of Chemical Industry.
Our R&D department houses 8 professional research engineers focusing on flame resistance polymers, thermal performance degradation, and acoustic absorption. Backed by 6 professional international sales coordinators and 230 highly trained production technicians, we ensure seamless supply chain logistics to over 66 countries worldwide.
Physical specifications and design parameters for Kingflex closed cell insulation sheets and tubes.
| Property | Standard Specification |
|---|---|
| Material Composition | Premium NBR/PVC Blend |
| Available Thickness | 6mm - 50mm |
| Density Range | 40 - 55 kg/m³ |
| Service Temp. Range | -40℃ to 105℃ |
| Closed Cell Rate | ≥ 98% |
| Compression Resilience | ≥ 80% |
| Property | Standard Specification |
|---|---|
| Material Composition | Premium NBR/PVC Blend |
| Available Thickness | 9mm - 40mm |
| Inner Diameter (ID) | 6mm - 114mm |
| Density Range | 40 - 55 kg/m³ |
| Thermal Conductivity | ≤ 0.034 W/m·K at 0℃ |
| Moisture Permeability | μ factor ≥ 10,000 |
Tested and verified by independent global testing laboratories to ensure total compliance.
Every batch of Kingflex flexible elastomeric foam undergoes rigorous testing before shipment. We provide full traceability documentation linking raw materials to final production runs, ensuring quality parameters conform to BS 476, CE, REACH, RoHS, UL94, and ASTM requirements.
Reliable communication, direct engineering support, and proven global installation results.
Take an inside look at our state-of-the-art facilities in Dacheng, China.
Technical answers regarding closed cell elastomeric foam performance, safety certifications, and installation.
Explore our specialized product catalogs designed for high-performance building and plant applications.
