Kingflex
Kingflex
Explore our premium range of elastomeric rubber foam and rock wool insulation products, engineered to control thermal conductivity across diverse industrial applications.
A rigorous mathematical approach to estimating heat transmission in closed-cell elastomeric and fibrous mineral insulation structures.
Thermal conductivity ($\lambda$ or $k$, measured in $W/(m\cdot K)$) is the intrinsic physical property that governs a material's capacity to conduct heat. In multi-layered mechanical setups, the rate of heat transfer through an insulation layer is calculated using Fourier's fundamental law:
Where:
$Q$ = Heat transferred (Joules),
$\lambda$ = Thermal Conductivity ($W/m\cdot K$),
$A$ = Surface Area ($m^2$),
$T_{hot} - T_{cold}$ = Temp gradient ($K$),
$d$ = Insulation thickness ($m$),
$t$ = Elapsed time (seconds).
For piping structures, radial heat flow calculation must account for the logarithmic change in cross-sectional area as thickness scales out. In these scenarios, the outer diameter ($D_o$) and inner diameter ($D_i$) ratios play a pivotal role in maintaining the target surface temperature to prevent external condensation in high-humidity HVAC environments.
Widely regarded as the primary absolute measurement standard for solid insulation materials, eliminating boundary heat loss errors.
A secondary, comparative standard measuring steady-state heat flux, offering rapid and precise thermal resistance calibrations.
The European benchmark verifying thermal resistance characteristics at mean temperatures ranging from cryogenic (-196°C) to 105°C.
A strategic look into the history, team, and infrastructure that drives China's leading green-building material enterprise.
Kingflex Insulation Co., Ltd. is a professional manufacturing and trading combo for thermal insulation products. Kingflex's research development and production department is located in the well-known capital of green-building materials in Dacheng, China. It is an energy-saving, environmental friendly enterprise concentrating on research, development, production, and sales. In operation, Kingflex takes energy saving and consumption reduction as the core concept. We provide advanced thermal insulation solutions by means of technical consultation, intensive research and development, custom production, installation guidance, and dedicated post-sale services, leading the development of the global green building materials industry.
Kingflex was established by the Jinwei Group, which boasts more than 40 years of pioneering history. Jinwei Group, established in 1979, holds the distinction of being the first manufacturer of thermal insulation materials north of the Yangtze River. Decades of research in polymer cross-linking and mineral crystallization technologies allow Kingflex to achieve ultra-consistent cell structures that prevent gas leakage, sustaining high thermal resistance over decades of continuous operation.
Our employees are outstanding in their own right, but together they make Kingflex an innovative and rewarding place to work. The Kingflex team is a tight-knit, highly talented group with a shared vision of providing consistently first-class service to our global clients. To maintain our technological edge, Kingflex employs eight professional engineers in our R&D Department, six dedicated international sales consultants, and 230 highly skilled workers in our production department.
Unmatched throughput capabilities ensuring continuous supply chains for major global energy and chemical developments.
At present, Kingflex operates five large automatic assembly lines, maintaining an annual production capacity of more than 600,000 cubic meters. Owing to our strict production standards, we have become a designated production enterprise appointed by the Ministry of Energy, the Ministry of Electric Power, and the Ministry of Chemical Industry of China. Our energy-saving solutions have supported infrastructure across construction, petroleum, chemical, national defense, aerospace, and ultra-low temperature processing industries globally in the past 16 years.
A visual insight into the laboratories where thermal conductivity, cell structures, and environmental resistances are validated.
A rigorous comparative analysis of NBR/PVC elastomeric rubber foam and rock wool properties for proper field deployment.
| Physical Parameter | NBR/PVC Elastomeric Rubber Foam | Rock Wool (Mineral Fiber) Insulation |
|---|---|---|
| Thermal Conductivity Range ($\lambda$) | 0.031 to 0.035 W/(m·K) at 0°C | 0.034 to 0.040 W/(m·K) at 25°C |
| Service Temperature Limit | -40°C to +105°C (Cryogenic variants up to -196°C) | Up to +750°C (Highly suitable for high-temp steam) |
| Moisture Permeability Factor ($\mu$) | $\mu \geq 10,000$ (High moisture barrier) | Open structure (Requires external vapor jacketing) |
| Fire Classification | Class 1 / Class 0 (BS 476), V-0 (UL94) | Non-combustible Class A1 (EN 13501-1) |
| Structural Density | 40 - 55 kg/m³ | 60 - 150 kg/m³ |
For cold-line processes, moisture intrusion is the single largest threat to thermal performance. Each 1% increase in volumetric moisture content increases the thermal conductivity of a material by roughly 7.5%. Because NBR/PVC closed-cell elastomeric rubber foam boasts a closed-cell rate exceeding 98%, it prevents moisture from migrating through the material. This keeps the internal structure dry, maintaining a stable thermal conductivity coefficient over its 10 to 15-year service life.
Technical profiles, dimensional tolerances, and operational parameters for sheet rolls and piping segments.
This premium sheet roll is engineered from a high-grade Nitrile Butadiene Rubber (NBR) and Polyvinyl Chloride (PVC) blend. Designed for wide-surface application such as rectangular HVAC ducts, vessel jackets, large-diameter tanks, and wall cladding, it delivers absolute thermal barrier consistency.
Engineered for cylindrical piping paths including HVAC lines, plumbing, refrigeration lines, solar collectors, and process chemical pipelines. An automated extrusion and internal spray-coating process guarantees seamless application onto structural piping without internal air pocket gaps.
A testament to Kingflex's adherence to international fire safety, environmental, and thermal testing criteria.
At Kingflex, product safety and conformity are non-negotiable. Our chemical batches undergo complete laboratory testing to ensure compliance with global fire safety and chemical emission regulations. Every shipping batch retains deep material traceability, tracing back to the raw polymer feedstock, blowing agents, and flame retardants used during processing.
Verifiable, transparent logs of client orders, customized requirements, and international deliveries.
We work closely with global engineering consultants, procurement managers, and mechanical contractors. From designing customized internal diameters to selecting appropriate densities for high-altitude cold rooms, we provide real-time updates and transparent communications.
Our proximity to major Chinese transport routes allows us to deliver large-scale shipments on schedule. Our logistics team handles international customs processes, container loading, and ocean transport logistics.
A detailed view of our raw rubber mixing, foaming ovens, automated cutting beds, and warehousing operations.
Detailed answers to the most common technical questions regarding thermal calculations, materials performance, and order processes.
Browse our additional high-performance thermal insulation products, engineered to meet international safety and efficiency standards.
A closer look at our custom-engineered thermal conductivity products for specialized industrial applications.
Rubber elastomeric foam insulation tube
Corrosion Resistant Rubber Foam Insulation Tube
Elastic Rubber Foam Insulation Pipe
Black Rubber Foam Insulation Pipe
Foam Rubber Foam Insulation Tube
HVAC Rubber Foam Insulation Tube
Elastomeric rubber foam insulation system
Kingflex flexible insulation material
Cryogenic rubber foam for low temperature
Elastomeric cryogenic insulation
Rock Wool Insulation Board
Rock wool thermal insulation blanket
