Kingflex
High-efficiency closed-cell elastomeric rubber foam materials engineered for demanding commercial, residential, and industrial ventilation designs.
In modern industrial and commercial architectures, the HVAC (Heating, Ventilation, and Air Conditioning) system consumes up to 40% of total building energy. Within these networks, air vents and ducts serve as the arterial pathways for conditioned air. Without proper, continuous thermal insulation, significant thermal losses occur due to convection and conduction through duct walls. Furthermore, uncontrolled condensation in cold-air distribution systems damages structural plasterboard, fosters microbial growth, and compromises indoor air quality (IAQ).
As a leading Chinese manufacturer, Kingflex Insulation Co., Ltd. provides systematic solutions utilizing high-density NBR/PVC elastomeric rubber foam. The inherent closed-cell structure operates as a built-in vapor barrier, offering stable thermal conductivity ($\lambda \le 0.034$ W/m·K at 0°C) and excellent water vapor resistance ($\mu \ge 10,000$). This ensures air handling units (AHUs) can maintain design temperatures throughout prolonged horizontal vent runs, substantially lowering compressor workloads and operational carbon emissions.
The global construction market is migrating rapidly toward energy-efficient building frameworks such as LEED, BREEAM, and DGNB. To meet these rigorous international green certifications, designers demand insulation products that are chemically stable, flame retardant, and easily formable.
China is home to the world's most concentrated manufacturing cluster for green building materials. Located in the renowned green-building capital of Dacheng, Kingflex leverages an optimized local raw material supply chain (elastomers, foaming agents, fire retardants) to guarantee delivery timelines and cost efficiency for international distributors.
Global architectural standards require stringent performance certifications. Our production processes and formulations are calibrated to yield products compliant with global safety standards, including BS 476, CE, REACH, RoHS, UL94, and ASTM.
Unlike traditional mineral wools which suffer from fiber shedding and particulate suspension in the airstream, NBR/PVC closed-cell foam prevents cleanroom contamination, rendering it ideal for electronics manufacturing, pharmaceutical laboratories, and modern hospital ventilation.
Kingflex Insulation Co., Ltd. is a professional manufacturing and trading combo for thermal insulation products. Our research, development, and production department is situated in the well-known capital of green building materials in Dacheng, China. As an energy-saving, environmentally friendly enterprise, we concentrate our resources on R&D, production, and worldwide sales of advanced elastomeric solutions.
In our daily operations, Kingflex takes energy saving and consumption reduction as the core corporate concept. We deliver turnkey insulation systems by means of engineering consultation, dedicated R&D production, precise installation guidance, and comprehensive post-sale service, leading the development of the global building materials industry.
Kingflex was established by the Jinwei Group, which boasts a rich history of more than 40 years. Founded in 1979, Jinwei Group was the pioneer manufacturer of thermal insulation materials north of the Yangtze River, paving the way for China's industrial insulation development.
Our employees are outstanding in their respective roles, but together they represent the core of what makes Kingflex a highly coordinated and reliable partner. The Kingflex team is a tight-knit, talented group sharing a unified vision of delivering consistently first-class service to our clients worldwide. Our organizational structure features:
Ensuring reliable volume supply and quality consistency through automated fabrication technology and state-of-the-art laboratory testing.
Currently, Kingflex operates 5 large automatic assembly lines, ensuring an annual production capacity of more than 600,000 cubic meters. These accomplishments have earned us designated production enterprise certifications from key government departments, including the Ministry of Energy, the Ministry of Electric Power, and the Ministry of Chemical Industry.
Our R&D laboratory conducts continuous testing for aging resistance, VOC emissions, smoke toxicity, and thermal conductivity shifts. By optimizing the ratio of NBR (Nitrile Butadiene Rubber) to PVC (Polyvinyl Chloride), our engineers have maximized the elastic recovery rate to over 80%. This property allows our pipes and sheets to resist structural compression under heavy ventilation support brackets, eliminating localized cold-bridging points.
E-E-A-T is not just a standard; it is our operational principle. Here is the physical proof of our quality compliance and successful global operations.
We maintain highly interactive relationships with our procurement partners, ensuring transparent lead times and custom specifications.
Empirical data to support mechanical engineering blueprints, thermal calculations, and ventilation load estimations.
| Parameter | Value / Range |
|---|---|
| Material Base | Nitrile Butadiene Rubber / Polyvinyl Chloride (NBR/PVC) |
| Thickness | 6mm - 50mm |
| Density | 40 - 55 kg/m³ |
| Service Temperature Range | -40℃ to 105℃ |
| Closed Cell Rate | > 98% |
| Thermal Conductivity ($\lambda$) | ≤ 0.034 W/m·K at 0℃ |
| Water Vapor Resistance ($\mu$) | ≥ 10,000 |
Primary Advantages: Even foaming, closed-cell rate over 98%, excellent thermal barrier, low moisture absorption, long-term stable thermal conductivity, compression resilience >80%, self-extinguishing off fire.
| Parameter | Value / Range |
|---|---|
| Material Base | NBR/PVC |
| Thickness | 9mm - 40mm |
| Inner Diameter (ID) | 6mm - 114mm |
| Density | 40 - 55 kg/m³ |
| Service Temperature Range | -40℃ to 105℃ |
Primary Advantages: Continuous tube extrusion, uniform wall thickness, professional internal spraying to ease installation, fire retardant, high elasticity, reduces risk of pipe freezing, corrosion protection for metal lines.
Elastomeric insulation is versatile, acting as the primary barrier against temperature loss and moisture in critical infrastructure globally.
Thermal insulation for high-volume air distribution ducts, air handling units (AHUs), and supply/return register junctions.
Thermal and acoustic insulation integrated into wall assemblies, ceilings, basements, and mechanical plenums.
Anti-condensation and anti-freezing wrap for municipal water lines, hot-water piping, and greywater management.
Heavy-duty insulation for high-pressure steam pipelines, industrial fluid conduits, and storage chemical tanks.
Insulation and sound dampening inside air shafts in hotels, shopping malls, exhibition centers, and healthcare campuses.
Insulation for transit car structures, locomotive cooling loops, sub-zero cold chain facilities, and liquid gas piping.
Our streamlined material storage and strict inventory control protocols ensure bulk order availability and zero delay shipping.
Explore our highly specialized elastomeric and alternative mineral fibers configured for diverse acoustic and high-temperature specifications.
Engineered NBR/PVC blend providing optimal condensation control on copper and steel pipes.
Coated with protective layers to shield pipes from chemical corrosion and acidic exposure.
Highly flexible material, reducing installation time around elbows and complex T-joints.
Traditional choice for industrial chillers and heavy-duty cold air ventilation ducts.
Economical standard density insulation providing excellent thermal resistance.
Optimized formulation meeting BS 476 flame retardant criteria for commercial HVAC.
Comprehensive multi-layer insulation systems designed for underground ductwork networks.
Designed for ultra-low temperature and cryogenic installations, preventing material embrittlement.
Versatile thermal insulation engineered for extreme high and low temperature limits.
Custom composite panels engineered for industrial petrochemical pipelines and gas transport.
High-density mineral rock wool boards suited for core structural firewalls and mechanical vents.
High thermal stability wrap designed to withstand direct flames and extreme temperatures.
We do not just produce insulation materials; we supply complete, eco-friendly energy-saving system solutions.
At present, Kingflex operates 5 large automatic assembly lines, maintaining an annual production capacity of more than 600,000 cubic meters. Our facilities have been recognized as designated production enterprises by the Ministry of Energy, the Ministry of Electric Power, and the Ministry of Chemical Industry.
Read More Capacity DetailsOur core mission is to supply customers all over the world with a full set of energy-saving insulation system solutions. We serve as an integrated provider of thermal insulation, cold insulation, and noise reduction for buildings and diverse industrial systems.
Read More Responsibility InitiativesVisual presentation of our international logistics, raw rubber quality control, and successful mechanical engineering implementations.
Developing next-generation HVAC solutions to adapt to shifting climate parameters and low-carbon construction standards.
To align with global decarbonization milestones, the Kingflex engineering team has mapped out a development plan focusing on halogen-free formulations and bio-based elastomers. Traditional NBR/PVC sheets utilize halogenated fire retardants to meet BS 476 standards. However, under high-heat scenarios, these additives can release trace acidic vapors. Our R&D focus is directed toward developing advanced metal-hydrate flame retardants that guarantee low smoke toxicity and minimum smoke density, keeping emissions non-hazardous during fire emergencies.
Additionally, we are pioneering the integration of aerogel micro-particles into our NBR matrices. This hybrid material configuration reduces thermal conductivity down to $\lambda = 0.028$ W/m·K while maintaining high elasticity. Consequently, thickness specifications can be decreased by 30%, saving valuable plenum space in modern, compact ceiling designs without compromising thermal safety margins.
For smart building applications, we are testing elastomeric sheets embedded with micro-sensor grids. These sensors monitor moisture and humidity accumulation at the duct-metal interface. By transmitting real-time performance indicators to building management networks, facility managers can prevent under-insulation issues and resolve moisture pooling before it leads to structural corrosion.
Get answers to common technical, commercial, and operational questions from our engineering support team.
Browse our three primary insulation divisions to find the right materials for your project.
Flexible, closed-cell NBR/PVC sheets, tubes, and rolls for HVAC ducting and mechanical piping.
Lightweight glass mineral fibers for roof, cavity wall, and acoustic ceiling insulation systems.
High-density stone mineral wool designed for structural fire protection and high-temp industrial pipes.
Select specialized elastomeric variants, adhesives, and composite products for low and high-temperature insulation requirements.
