Explore our specialized range of elastomeric NBR/PVC systems designed to prevent condensation, control thermal transfer, and guarantee long-term performance.
A comprehensive engineering review of elastomeric closed-cell properties, moisture barriers, and acoustic attenuation capabilities.
In modern HVAC architecture and large-scale industrial utility setups, thermal management inside ventilation air ducts determines overall system performance. Air handling systems carry cool or warm air across massive structures, creating dynamic thermal differences between duct environments and ambient room conditions. If left untreated, these variations trigger persistent condensation issues, mold growth, and high energy loss.
Kingflex NBR/PVC rubber foam insulation represents a highly engineered polymeric blend. Nitrile butadiene rubber (NBR) delivers elasticity and low-temperature durability, while polyvinyl chloride (PVC) adds thermal resistance and flame retardancy. This combination features a closed-cell physical architecture (with cellular counts exceeding 98%), preventing moisture from moving through the structure. Because it relies on closed-cell dynamics rather than physical moisture barriers, it is highly resilient against physical wear.
To support engineering planning and construction compliance, we build our products to meet strict mechanical standards. The table below outlines the core properties of our standard black rubber foam sheet rolls:
| Performance Characteristic | NBR/PVC Technical Measurement Value | Referenced Test Criteria (BS/ASTM/ISO) |
|---|---|---|
| Thermal Conductivity (λ) | ≤ 0.034 W/(m·K) at 0 °C (32 °F) | ASTM C518 / ISO 8301 |
| Water Vapor Diffusion Index (μ) | ≥ 10,000 (Prevents moisture infiltration) | EN 12086 / BS 476 Part 24 |
| Density range (Standard) | 40 - 55 kg/m³ (Consistent foaming) | ASTM D1622 |
| Compression Resilience Rate | Over 80% (Exceptional structure retention) | ASTM D1056 |
| Operating Temp Range | -40 °C to +105 °C (-40 °F to +221 °F) | ASTM C534 |
| Fire Safety Certification | Class 0 & Class 1, Self-extinguishing properties | BS 476 Part 6 & 7 / UL 94 V-0 |
Founded on a legacy of thermal engineering excellence, we supply critical components to international infrastructure projects.
Kingflex Insulation Co., Ltd. operates as a specialized manufacturing and trading combo for high-end thermal insulation products. Our R&D and production departments are located in Dacheng, China—recognized globally as a major hub for advanced green-building materials. As an energy-saving, environmental-friendly enterprise, Kingflex handles the entire process, including research, formulation, manufacturing, quality testing, and field support.
Established by the Jinwei Group, which has a manufacturing history of over 40 years, Kingflex builds on decades of experience. The parent group was founded in 1979 as one of the first thermal insulation producers north of the Yangtze River. Today, this experience translates into consistent quality control and production lines capable of supporting the most demanding project requirements.
How we combine advanced materials science with optimized industrial supply chains to deliver global value.
We focus on improving the physical performance and sustainability of elastomeric foams. Our R&D division works on three core areas:
Kingflex runs 5 large-scale automatic assembly lines, delivering an annual output of over 600,000 cubic meters. Because of this capacity, we are an approved supplier for the Ministry of Energy, the Ministry of Electric Power, and the Ministry of Chemical Industry.
Located in China’s chemical industrial hub, we have reliable access to key raw materials. This proximity helps us maintain price stability and steady production, shielding global buyers from market fluctuations.
Our insulation systems perform reliably across diverse settings, from high-rise office towers to cryogenic terminals.
Installed on supply and return air duct systems to minimize thermal gain, reduce energy consumption, and prevent condensation leaks in office buildings, hospitals, and shopping centers.
Engineered for low-temperature settings down to -40°C. Protects pipe networks, chilled water loops, and chemical transfer systems against freezing and mechanical stress.
Helps control sensible heat ratios within critical computer rooms. Prevents condensation damage and maintains environmental stability near sensitive IT hardware.
Acoustic and Sound Absorption: Standard sheet rolls can be specified with open-cell internal structures or micro-perforations. These modifications help absorb low-frequency rumble and fan noise inside air ducts, supporting acoustic goals in performance spaces and commercial projects.
Chemical Plant Adaptation: In heavy chemical manufacturing plants, pipelines face exposure to salts, oils, acids, and atmospheric moisture. Our closed-cell rubber systems resist typical industrial chemicals, shielding outer steel surfaces and lowering the risk of Corrosion Under Insulation (CUI).
We test and certify our products to meet the safety and environmental codes of global markets.
Our manufacturing processes comply with major international quality and environmental standards. We hold approvals including BS 476 (Class 0 and Class 1), CE, REACH, RoHS, UL94, and ASTM. These verified tests provide international builders, engineers, and distributors with the documentation needed for complex project certifications.
Our products are installed in industrial settings, mass transit systems, and commercial properties globally.
In transportation applications, Kingflex products provide reliable temperature control and vibration damping for rail carriages, cargo holds, and ship cooling systems. Because our closed-cell structure resists moisture and mechanical wear, it maintains performance in damp environments, helping lower maintenance overhead.
Technical guidance and answers for specifiers, engineers, and purchasing teams regarding Kingflex rubber insulation.
Select the correct product specification for your project. Our team is available to assist with technical submittals.
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