Closed-cell elastomeric thermal insulation materials based on Nitrile Butadiene Rubber (NBR) and Polyvinyl Chloride (PVC) blends represent the pinnacle of flexible engineering. They provide exceptional thermal performance due to their unique microcellular structure. Each cell contains dry air pockets locked inside a dense, cross-linked matrix. This structure results in extremely low moisture permeability and highly stable thermal conductivity.
For engineering contractors and industrial specifiers, selecting the right insulation is critical. Preventing moisture ingress prevents liquid accumulation on piping, which causes Corrosion Under Insulation (CUI) and energy loss. Kingflex designs NBR/PVC closed-cell foams with over 98% closed cells. This design ensures that the water vapor transmission rate (WVTR) remains low over long operating lifespans. This provides reliable thermal protection for chilled water systems, HVAC ducts, and ultra-low temperature cryogenic processes.
Kingflex Insulation Co., Ltd. is a leading manufacturer and trading conglomerate specializing in high-performance thermal insulation products. Our advanced research, development, and manufacturing center is located in Dacheng, China, a major hub for green building materials. Kingflex operates as an energy-saving, environmentally friendly enterprise. We integrate product development, high-volume production, global distribution, installation consulting, and comprehensive after-sales services.
Established by the Jinwei Group, which boasts over 40 years of history, our legacy began in 1979. Jinwei Group was a pioneer in thermal insulation manufacturing north of the Yangtze River. Today, Kingflex carries this legacy forward, providing insulation systems that reduce energy consumption and operational costs.
Elastomeric closed-cell insulation is used in diverse environments, from high-humidity tropical sites to high-demand industrial facilities.
In tropical and coastal regions with high ambient humidity, condensation on chilled water pipes is a constant threat. Standard open-cell insulation absorbs water, leading to CUI and mould growth. Kingflex closed-cell elastomeric tubing blocks water vapor, preventing condensation and preserving indoor air quality.
Liquefied gas lines, LNG systems, and cold storage units require insulation that remains flexible below freezing. Our elastomeric solutions protect down to -40°C and ultra-low temperatures. This prevents thermal shock, reduces boil-off gas rates, and maintains process control.
Modern commercial buildings, hospital wards, and high-tech manufacturing cleanrooms demand effective acoustic management. Our flexible NBR/PVC panels absorb air-duct noise and structural vibrations. This provides dual benefits: thermal insulation and noise reduction.
Understanding how NBR/PVC closed-cell elastomeric stands against traditional rock wool and glass wool insulation systems.
| Property Parameter | Kingflex NBR/PVC Closed Cell Elastomeric | Traditional Rock Wool | Glass Wool |
|---|---|---|---|
| Thermal Conductivity (0°C) | ≤ 0.034 W/(m·K) | 0.039 - 0.045 W/(m·K) | 0.036 - 0.042 W/(m·K) |
| Closed-Cell Structure Rate | ≥ 98% | Open fiber network (< 5%) | Open fiber network (< 5%) |
| Water Vapor Resistance (µ-factor) | ≥ 10,000 (Built-in vapor barrier) | ~ 1 (Requires external barrier) | ~ 1 (Requires external barrier) |
| Flexibility & Installation | Highly flexible, easy to wrap around complex bends | Rigid, brittle, produces irritating fibers | Semi-flexible, produces dust during handling |
| Corrosion Under Insulation (CUI) | Zero water trapping; prevents CUI | High risk due to water accumulation | Medium-High risk in humid conditions |
China is a global hub for chemical engineering and manufacturing technology. This offers unmatched advantages in material raw-material integration, production capacity scaling, and shipping logistics. Located in the Dacheng industrial park, Kingflex leverages a highly efficient local supply chain. This enables us to source NBR, PVC polymers, and specialized fire retardants quickly. It also allows us to manage manufacturing costs effectively without sacrificing quality.
Our facility houses 5 large-scale, automated production lines. These lines operate continuously to yield over 600,000 cubic meters of high-density elastomeric material annually. This high capacity allows Kingflex to fulfill large-scale industrial orders with shorter lead times than Western competitors. We offer comprehensive OEM/ODM services, custom packaging, and optimized shipping routes from Tianjin Port. This guarantees safe, on-time delivery to our international clients.
Behind our world-class products is a dedicated team of engineers, researchers, and trade professionals.
Our dedicated R&D division has 8 professional engineers. They specialize in polymer chemistry, vulcanization technology, and thermodynamics, continuously working to improve product properties.
Our global market division includes 6 multilingual international trade specialists. They assist clients with logistics planning, regulatory compliance, and customs documentation.
Over 230 skilled operators run our extrusion machinery, foam ovens, and quality-control systems. They ensure consistent physical and chemical properties across all batches.
Adapting to evolving environmental regulations, safety standards, and performance requirements through innovation.
Traditional elastomers release acidic smoke when exposed to high heat. Kingflex is expanding its halogen-free line, using non-halogenated flame retardants. These products prevent smoke toxicity, making them ideal for tunnels, ships, and confined public areas.
Our research focuses on extending elastomeric performance down to -200°C for LNG storage and transport. By optimizing NBR content and cross-linking density, we prevent cracking under extreme thermal shock.
Kingflex is committed to sustainability. We employ clean foaming agents with zero ozone depletion potential (ODP) and global warming potential (GWP). This helps our clients earn credits under green building certification systems like LEED and BREEAM.
Operating in international markets requires rigorous compliance with building and fire safety codes. Kingflex products are manufactured under strict ISO 9001 and ISO 14001 guidelines to ensure quality and environmental compliance.
We hold testing certifications from international laboratories. Our materials meet BS 476 Part 6 & 7 (Class 0/1) standards for fire safety, UL94 V-0 rating for flame retardancy, and comply with REACH and RoHS environmental directives. This testing ensures that our products meet the technical requirements of major engineering designs worldwide.
Kingflex solutions are deployed globally, protecting critical HVAC systems and industrial facilities.
Kingflex products are manufactured to standard industrial dimensions, ensuring easy installation and full compatibility with existing piping systems.
A glimpse into our manufacturing capacity, showing raw material handling, extrusion, curing, and warehouse storage.
Discover specialized variants optimized for specific temperature, durability, and chemical environments.
Find authoritative answers to technical and operational questions about closed-cell elastomeric insulation.
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