Kingflex
Kingflex
Engineered to meet international acoustics, fire resistance, and thermal performance parameters. Explore our primary industrial product lines.
In complex building design and heavy industrial processing, thermal efficiency and acoustics can no longer be evaluated in isolation. Mechanical systems, air conditioning conduits, and industrial pipe networks are major sources of structural vibration and fluid-dynamic noise. Resolving these challenges requires highly specialized materials capable of serving dual functions: mitigating thermal conductivity ($\lambda$) while maximizing sound absorption and vibration damping.
This technical guide highlights how Kingflex Closed-Cell Elastomeric Foams and high-performance insulation systems serve this exact purpose. By referencing technical PDFs and engineering specifications, procurement teams, consultants, and MEP engineers can secure custom solutions tailored to structural requirements, environmental regulations, and energy conservation targets.
Unlike standard open-cell polyurethane products that excel solely at sound absorption (NRC), Kingflex elastomeric closed-cell foams feature an engineered polymer matrix that provides structural acoustic isolation. Our NBR/PVC compound works as a resilient sound-dampening layer, reducing sound transmission class (STC) values along structural ducts and steel piping by decoupling structural vibrations from the surrounding air.
Established under the Jinwei Group, Kingflex represents over four decades of thermal and acoustic insulation advancement in North China.
Kingflex is established by the Jinwei Group, which possesses more than 40 years of manufacturing history. Founded in 1979, the group was the first major manufacturer of thermal insulation materials north of the Yangtze River. Decades of continuous development have shaped Kingflex Insulation Co., Ltd. into a premier manufacturing and trading combo, focusing on environmentally friendly, energy-saving, and acoustics-enhancing building materials.
Our state-of-the-art facility is located in Dacheng, China—known globally as a hub for green-building material innovation. We combine intensive R&D with strict industrial quality management systems. The Kingflex team includes 8 professional R&D engineers, 6 dedicated international sales managers, and 230 highly trained workers in our primary production facility.
A summary of technical trends driving modern insulation procurement, specifying, and structural design.
Global construction codes are shifting away from materials that release corrosive gases during combustion. Specifying halogen-free elastomeric sheets has become standard for airports, data centers, and public transport infrastructure.
Engineers now evaluate insulation based on total lifecycle return. Choosing durable NBR/PVC closed-cell materials with a service life of 10 to 15 years reduces maintenance overhead and controls long-term operational costs.
Traditional thermal insulation alone often fails to meet modern building acoustic requirements. Multi-layered, high-density elastomer products are increasingly specified to reduce noise across both low-frequency and mid-frequency bands.
Engineered standard dimensions and operational specifications for Kingflex insulation systems.
| Insulation Type | Material Formulation | Available Thickness | Density Range | Service Temp. Limit | Key Properties |
|---|---|---|---|---|---|
| Black Rubber Foam Sheet Roll | Premium NBR/PVC Blend | 6mm - 50mm | 40 - 55 kg/m³ | -40℃ to 105℃ | >98% Closed Cell Rate, Low $\lambda$, High $\mu$ Factor |
| Black Rubber Foam Pipe | Premium NBR/PVC Blend | 9mm - 40mm (ID: 6-114mm) | 40 - 55 kg/m³ | -40℃ to 105℃ | Uniform Foaming, Great Elasticity, Easy Pipe Spraying |
| Cryogenic Insulation Series | Specialized Low-Temp Elastomer | Custom Layered Sheets/Tubes | 50 - 65 kg/m³ | Down to -200℃ | Micro-Closed Cells, Thermal Shock Fatigue Proof |
| Rock Wool Thermal Insulation | High-Density Fibrous Basalt | 30mm - 100mm | 80 - 150 kg/m³ | Up to 650℃ | Class A1 Fireproof, Outstanding High-Temp Stability |
Our 5 automated lines output consistent material densities. Our NBR/PVC blends are formulated with built-in flame retardants, ensuring the final insulation is self-extinguishing and compliant with building safety standards.
With 8 dedicated in-house engineers, Kingflex performs continuous testing on thermal conductivity, compression resilience (tested at >80% recovery), and water vapor permeability. This focus on performance ensures our products reliably meet long-term specifications.
Integrated solutions for building systems, industrial piping, and sound isolation requirements.
In hotels, shopping centers, and hospitals, mechanical background noise can compromise interior spaces. Wrapping air ducts and line sets in Kingflex NBR/PVC sheets reduces air-turbulence noise, controls condensation, and limits acoustic transfer through walls.
Chemical processing and power plants depend on consistent thermal control. Our closed-cell rubber foam provides moisture protection and limits heat transfer on steam lines, processing loops, and storage vessels, lowering utility usage and mitigating Corrosion Under Insulation (CUI).
Transporting LNG or operating ultra-low temperature (ULT) systems down to -200°C requires high thermal stability. Kingflex Cryogenic Elastomeric systems resist structural thermal shock, prevent vapor leaks, and protect piping from ice formation.
Our materials undergo testing at international laboratories to confirm compliance with global fire, environment, and performance standards.
Exporting across 66+ countries, Kingflex manages global logistics from production scheduling to final delivery.
Every batch of Kingflex NBR/PVC elastomeric insulation includes product traceability. Our team oversees packaging, customs clearance, and container shipping, ensuring deliveries arrive in proper condition for installation.
We offer OEM and customization options for thicknesses, internal diameters, and laminated finishes to match specific project plans.
How Kingflex is aligning with next-generation green building standards and industrial sustainability targets.
To meet strict smoke development index standards (ASTM E84 25/50 limits), our R&D department continues to refine fire-retardant additive combinations, improving fire safety while maintaining thermal and acoustic properties.
We are developing bio-based polyurethane and natural rubber alternatives to reduce the carbon footprint of our insulation products, helping projects meet LEED and BREEAM standards.
Kingflex is expanding its acoustic testing services. By providing custom acoustic simulations, we help engineers model structural dampening and insertion loss curves in duct networks prior to installation.
Answers to technical, regulatory, and logistics questions from our engineering and procurement clients.
Select from our full catalog of elastomeric, halogen-free, and cryogenic insulation materials.
