Premium engineered closed-cell and open-cell elastomeric matrices designed for structural sound absorption and heat preservation.
Analyzing modern building environments and standardizing elastomeric insulation properties for performance optimization.
Within mechanical ventilation systems, high-velocity airflows interact with metal duct walls to generate complex vibrational waves. These waves transition into audible airborne sound, commonly referred to as HVAC system noise. Without sound dampening structures, noise travels through the duct network, causing ambient issues in commercial, residential, and industrial environments.
Additionally, structural vibration dampening is critical. Effective acoustic systems use open-cell and closed-cell elastomeric rubber foam sheets. These materials exhibit viscoelastic properties that absorb and dissipate sound energy, converting kinetic vibration into heat energy and maintaining system thermal efficiency.
Kingflex Insulation Co., Ltd. delivers engineered NBR/PVC elastomer designs that address this thermodynamic-acoustic balance. By combining cellular thickness configuration (6mm to 50mm) with specific structural densities (40-55 kg/m³), Kingflex solutions lower insertion loss metrics and limit sound propagation across all octaves.
Implementing global building systems requires meeting regional fire safety and mechanical compliance codes. For instance, the British standard BS 476 (Class 0 and Class 1) establishes strict regulations for surface flame spread, directly influencing choices in mechanical insulation materials.
Additionally, products must comply with the European Union's CE mark, REACH, and RoHS rules to verify they are free from hazardous chemicals and polybrominated flame retardants. In the North American market, materials must satisfy UL94 and ASTM standards for density, smoke toxicity index, thermal performance, and water vapor transmission rate (WVTR).
Kingflex manufactures all materials to comply with these global specifications. These high standards ensure suitability for international projects, including sub-zero cryogenic systems, high-temperature lines, and heavy-duty commercial air ducts.
Combining 40 years of industry experience with automated manufacturing lines to deliver consistent global supply.
Establishment Year
Annual Capacity (m³)
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Automatic Assembly Lines
Established under the Jinwei Group, which traces its origins back to 1979 as a pioneer thermal insulation manufacturer north of the Yangtze River, Kingflex Insulation Co., Ltd. represents over four decades of thermal and acoustic engineering development.
Located in Dacheng, China—a hub for green building materials—Kingflex integrates design, production, and worldwide sales. Currently, the company operates five automated assembly lines, achieving an annual production capacity of over 600,000 cubic meters. These large-scale facilities have earned Kingflex status as an designated manufacturer for the Ministry of Energy, the Ministry of Electric Power, and the Ministry of Chemical Industry.
Backed by eight professional R&D engineers, six international sales representatives, and 230 production staff, Kingflex delivers custom products designed for specific project requirements, ensuring thermal efficiency and noise control.
A comprehensive analysis of Kingflex elastomeric NBR/PVC physical properties, dimensions, and operational limits.
| Kingflex Standard Parameter | Black Rubber Foam Sheet Roll | Black Rubber Foam Insulation Pipe |
|---|---|---|
| Base Composition | NBR/PVC Elastomer Blends | NBR/PVC Premium Polymer Base |
| Available Thickness | 6mm – 50mm (Flexible custom sizing) | 9mm – 40mm (Standard structural grades) |
| Core Density Rating | 40 – 55 kg/m³ | 40 – 55 kg/m³ |
| Inner Diameter (ID) Range | N/A | 6mm – 114mm (Compatible with global pipelines) |
| Service Temperature Range | -40℃ to +105℃ | -40℃ to +105℃ |
| Acoustic Damping Method | Airborne & structure vibration absorption | Vibration reduction and pipe echo insulation |
| Blowing Agent Tech | Zero-ODP Eco-friendly gas foaming | Zero-ODP Eco-friendly gas foaming |
How Kingflex insulation and sound dampening products are used in demanding industries worldwide.
Continuous testing ensures every batch meets international insulation and acoustic safety standards.
Kingflex maintains a dedicated research and development facility to test material recipes and production methods. Testing focus areas include thermal conductivity degradation over time, sound transmission loss, and smoke toxicity suppression.
By blending NBR and PVC polymers with eco-friendly foaming agents, our engineers produce flexible closed-cell foams with high density and excellent durability. Our team has the expertise to customize flame-retardant properties to match specific project specifications and regional building requirements.
Our quality management system is certified to ISO standards, ensuring structured quality control from raw materials to final packaging. Each production run is fully traceable, from chemical batching to the delivery container.
Kingflex products are tested and certified by recognized authorities, including BS 476, CE, REACH, RoHS, UL94, and ASTM. This compliance simplifies project approvals for engineering firms and developers worldwide.
We work closely with global engineering clients, providing responsive technical support and tracking orders from factory to job site.
We believe transparent communication is essential for successful projects. Kingflex works directly with clients to provide custom material specifications, detailed price lists, and technical advice for challenging field installations.
We help contractors choose the right thicknesses and densities, prepare documentation for municipal inspections, and ensure on-time delivery for complex construction projects.
Over the past 16 years, clients in 66+ countries have used our solutions to prevent thermal loss and control duct noise, making Kingflex a trusted partner in the global insulation industry.
Developing lighter, more sustainable, and high-performance acoustic materials for tomorrow's buildings.
Future HVAC systems require solutions that address both high-frequency sound transmission and low-frequency motor hum. Kingflex is currently testing multi-layered composite materials that combine closed-cell foam sheets with high-density viscoelastic layers.
These new composite designs aim to improve sound transmission class (STC) ratings without increasing overall material thickness, helping to save space in tight ceiling plenums.
We are focused on reducing the environmental footprint of our materials. Our research team is developing NBR/PVC blends using bio-based polymers and natural, non-halogenated flame retardants.
This approach will maintain excellent fire ratings (such as BS 476 Class 0 and UL94 V-0) while lowering overall smoke density, helping projects achieve green building certifications like LEED and BREEAM.
Common technical questions answered by our engineering and product support teams.
Explore our range of elastomeric solutions designed for specialized temperature and acoustic applications.
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