Kingflex
Premium structural solutions designed for extreme thermal performance and moisture barriers.
Thermal insulation materials have transitioned from simple energy-saving covers to advanced, integrated architectural components. Driven by strict global regulations such as the EU Green Deal, ASHRAE 90.1, and China's double-carbon strategy (Peak Carbon & Carbon Neutrality), modern mechanical piping systems must optimize their thermal performance.
In massive HVAC configurations, industrial processing plants, and marine settings, thermal energy loss represents a significant operational cost. The choice of insulation directly impacts system efficiency, lifecycle duration, and structural integrity. Selecting premium closed-cell NBR/PVC and elastomeric foam solutions is essential for modern plant design.
A comparative review of the physical properties, tolerances, and design constraints of NBR/PVC elastomeric formulations.
Features an optimized density range (40-55 kg/m³) to ensure minimal heat transfer. The thermal conductivity ($\lambda$) remains low at ≤ 0.034 W/m·K at 0°C, offering excellent thermal performance across different temperatures.
With an even cell size distribution and a closed-cell rate exceeding 98%, the material offers high resistance to moisture vapor diffusion. This reduces water penetration and keeps the thermal core dry.
Formulated with premium fire retardants to meet BS 476, CE, REACH, ROHS, UL94, and ASTM certifications. The material is self-extinguishing and produces minimal toxic gas emissions during fire exposure.
| Product Class | Material Formulation | Thickness Scope | Inner Diameter (ID) | Density Range | Thermal Boundary Limits |
|---|---|---|---|---|---|
| Black Rubber Foam Sheet Roll | Elastomeric Nitrile (NBR/PVC) | 6mm - 50mm | Flat Roll / Sheet Form | 40 - 55 kg/m³ | -40℃ to 105℃ |
| Black Rubber Foam Insulation Pipe | Elastomeric Nitrile (NBR/PVC) | 9mm - 40mm | 6mm - 114mm | 40 - 55 kg/m³ | -40℃ to 105℃ |
Real-world applications of elastomeric closed-cell structures under severe operational conditions.
In tropical locations with high ambient humidity, cold-water plumbing systems are susceptible to condensation. Standard fiberglass insulation can absorb moisture over time, reducing its performance. Kingflex's closed-cell structure offers an integrated vapor barrier. With over 98% closed cells, it blocks ambient moisture, preventing condensation on chilled water pipes.
Cryogenic systems require reliable thermal insulation at very low temperatures. Normal insulation can crack and lose structural integrity under extreme cold. Kingflex's low-temperature synthetic rubber sheet and cryogenic insulation tubes maintain flexibility down to -40℃ (and custom systems for lower thresholds), minimizing shrinkage and thermal leaks.
Public structures require strict indoor air quality and fire safety standards. Kingflex NBR/PVC insulation contains no halogenated fire retardants or formaldehyde. It meets BS 476 Part 6 & 7 Class 0 ratings. This ensures low smoke emission, no dripping during fire exposure, and low VOC levels for indoor environments.
Founded by the Jinwei Group (established in 1979), Kingflex has over 40 years of manufacturing experience. We were the first thermal insulation manufacturer north of the Yangtze River. Dacheng, China, where our production and R&D division is located, is recognized as a major capital of green building materials.
Kingflex focuses on research and development to produce high-performance, energy-saving insulation systems. Our team includes 8 professional R&D engineers, 6 international sales agents, and 230 technicians. We provide support from initial design consultation to manufacturing and on-site installation guidance.
How Kingflex secures raw materials and maintains delivery schedules for large global infrastructure projects.
Kingflex is located in Dacheng, a hub for building materials, which provides direct access to domestic chemical raw materials. This helps maintain stable supply structures for NBR (Nitrile Butadiene Rubber) polymers and flame retardants even during market changes. Our automated manufacturing process minimizes material waste and maintains consistent product density.
We are a designated production enterprise for the Ministry of Energy, the Ministry of Electric Power, and the Ministry of Chemical Industry in China. This status supports reliable operations and shipping logistics. Our facilities are located near major ports like Tianjin and Qingdao, helping us coordinate international shipments and manage logistics risks.
Our research and development pipeline for next-generation thermal insulation solutions.
Researching bio-elastomers to replace petroleum-derived NBR. This aims to reduce the carbon footprint of our products while maintaining standard physical properties and flame resistance.
Developing silica-aerogel infused elastomeric sheets. This hybrid design aims to lower thermal conductivity (
Integrating thin electronic trace arrays within the insulation roll. This design allows real-time tracking of moisture ingress, helping to identify potential leak points before damage occurs.
Kingflex products undergo comprehensive laboratory testing to meet international market regulations.
Kingflex insulation materials are tested to comply with international standards. We maintain certifications for BS 476, CE, REACH, RoHS, UL94, and ASTM. These standards confirm the material performance, fire safety, and environmental suitability of our products for building and industrial projects.
Every manufacturing batch undergoes quality control procedures, checking parameters like foam density, closed-cell ratio, and dimensional stability. Our quality control tracking processes help ensure product consistency from raw materials to final shipment.
Documentation from global commercial installations and client communications.




















Heavy-duty rolls, custom densities, and specialty industrial insulation products.
Examine the specific dimensions, density configurations, and material structures of our key product segments.
Closed-cell structure with a high resistance to moisture vapor, suitable for cooling pipe applications.
Formulated for chemical resistance, protecting pipes from corrosion under insulation (CUI).
Flexible design allows for easy installation around bends and complex pipeline shapes.
Standard insulation pipe for commercial hot and cold water plumbing lines.
Flexible thermal insulation suitable for standard domestic and residential HVAC systems.
Designed to improve energy efficiency in high-capacity air conditioning and chiller units.
Integrated insulation system matching pipes, sheets, adhesives, and vapor barrier tapes.
Cryogenic insulation material designed for performance down to -40℃.
Engineered to minimize contraction and expansion cycles in petrochemical applications.
High-density cryogenic barrier designed to prevent thermal stress in industrial piping.
High-density rock wool board designed for high-temperature furnace and wall applications.
Flexible high-temperature insulation blanket for industrial pipelines and vessels.
Detailed engineering answers regarding elastomeric foam characteristics, safety parameters, and custom manufacturing capability.