Highly optimized closed-cell foam sheets and roll configurations designed to reduce thermal bridging and eliminate energy wastage across critical applications.
Kingflex Insulation Co., Ltd. is a professional manufacturing and trading combo for high-end thermal and acoustic insulation products. Our research, development, and primary production divisions are situated in Dacheng, China—historically and internationally recognized as the capital of green-building materials. As an energy-saving, environmentally friendly enterprise, Kingflex concentrates the entirety of its research, engineering prowess, and production capacities on providing high-yield, low-thermal-conductivity configurations.
Kingflex was established by the Jinwei Group, which commands a history of more than 40 years. Established in 1979, Jinwei Group was the first manufacturer of high-grade thermal insulation materials north of the Yangtze River. Operating under the core philosophy of "energy saving and consumption reduction," we assist international construction, HVAC, cryogenic, and petrochemical firms with specialized project-specific insulation designs, installation support, and long-term compliance verification.
Today, our product range includes closed-cell NBR/PVC elastomeric rubber foam sheets, rolls, and pre-formed pipe insulations. Our technical systems are actively engineered to handle intense temperature extremes from -200°C for cryogenic Liquefied Natural Gas (LNG) pipelines up to 105°C for heat tracing and industrial hot water supply pipes.
Exploring the molecular evolution of NBR/PVC polymer structures to support green energy transition and carbon-neutral building designs.
Modern HVAC and process chilling lines require insulation that resists moisture ingress. Water vapor intrusion rapidly escalates thermal drift, compromising insulation efficiency. Kingflex closed-cell materials are formulated with a target vapor diffusion resistance index (μ) exceeding 10,000. This molecular shield prevents condensation on cold pipe walls, stopping corrosion under insulation (CUI) before it begins.
As international regulations shift toward sustainable architectures, halogenated fire retardants are being phased out in high-occupancy structures. The Kingflex R&D department is designing the next generation of halogen-free, low-smoke, non-toxic (HFFR) elastomeric sheets. By altering plasticizer selections and utilizing high-grade Nitrile-Butadiene Rubber (NBR) matrices, we ensure minimal smoke density values during thermal decomposition.
By refining cell nucleation kinetics during high-pressure vulcanization, our engineers have reduced the average cell diameter to less than 150 microns, achieving a closed-cell ratio exceeding 98%. This micro-cellular configuration traps dry air inside micro-compartments, significantly reducing convective and conductive heat transfer. This structural profile keeps thermal conductivity (λ) down to ≤ 0.034 W/(m·K) at 0°C.
Tailoring elastomeric systems to meet the demands of large-scale infrastructure, high-output industrial plants, and delicate HVAC projects.
In large commercial high-rises, shopping centers, and airport terminals, massive chilled water supply loops operate 24/7. Even small thermal insulation failures can cause massive energy losses and condensation drips that damage ceiling assemblies. Kingflex closed-cell elastomer sheets provide uniform protection on large air ducts and piping networks. The flexible nature of the NBR/PVC blend allows for seamless, tight joints around complex elbows, valves, and manifold systems.
Primary Parameters Met: Class 0/Class 1 Fire protection, low toxicity smoke ratings, and zero mold growth (ASTM G21 compliant).
Handling Liquefied Natural Gas (LNG) at temperatures down to -162°C requires sophisticated engineering. Standard insulation materials become brittle and fail due to thermal shock and moisture expansion. Kingflex Cryogenic elastomeric systems combine multiple layers of flexible foam rubber with vapor barriers. This composite structure limits thermal stress cracks and maintains thermal performance, preventing boiling boil-off gas (BOG) generation in large cryogenic storage tanks.
Primary Parameters Met: Performance range down to -200°C, high mechanical elasticity, and excellent moisture barrier.
Ensure your selection matches the mechanical and thermodynamic demands of your site.
| Insulation Sub-Type | Material Density (kg/m³) | Thickness Scope (mm) | Thermal Cond. (λ W/m·K) | Service Temp Limits (°C) | Primary Standards |
|---|---|---|---|---|---|
| Kingflex Sheet & Roll | 40 - 55 kg/m³ | 6mm - 50mm | ≤ 0.034 at 0°C | -40°C to 105°C | ASTM C534, BS 476 Cl. 0 |
| Flexible Cryogenic Elastomeric | 50 - 65 kg/m³ | 10mm - 40mm | ≤ 0.030 at -160°C | -200°C to 105°C | ASTM C177, ISO 13787 |
| Acoustic Open Cell Panel | 45 - 60 kg/m³ | 15mm - 50mm | N/A (Acoustic Absorption) | -40°C to 85°C | ASTM E90, ISO 354 |
| Standard NBR/PVC Pipe Insulation | 40 - 55 kg/m³ | 9mm - 40mm | ≤ 0.035 at 20°C | -40°C to 105°C | GB/T 17794, UL94 V-0 |
Technical Dimension Details & Application Parameters:
• Black Rubber Foam Insulation Sheet Roll: Material: NBR/PVC | Thickness: 6mm–50mm | Density: 40–55 kg/m³ | Temperature Range: -40℃ to 105℃.
• Black Rubber Foam Insulation Pipe: Material: NBR/PVC | Thickness: 9mm–40mm | ID range: 6mm–114mm | Density: 40–55 kg/m³ | Temperature Range: -40℃ to 105℃.
• Specialized Features: High flame retardancy with self-extinguishing properties, >80% compression resilience, closed-cell rate >98%, and uniform cell distribution that prevents moisture tracking.
Kingflex has scaled its Dacheng manufacturing center to feature 5 large, highly automated, continuous extrusion assembly lines. Our facility achieves an annual production capacity exceeding 600,000 cubic meters. Because of this high output and reliable quality, we are a designated manufacturer for major Chinese ministries, including the Ministry of Energy, the Ministry of Electric Power, and the Ministry of Chemical Industry.
Our production environment integrates raw material dosing systems with real-time temperature-controlled extrusion chambers. This setup guarantees that every cubic meter of elastomeric foam has uniform density, cell sizing, and chemical distribution. This consistency translates to dependable fire safety performance on-site.
R&D Team Depth: Our technical department is led by 8 professional insulation research engineers, supported by a workforce of 230 technicians and 6 international logistics representatives. This team structure enables us to handle high-volume procurement orders while maintaining short lead times.
Addressing key concerns for procurement officers, from fire codes to international logistics.
Global projects require certified proof of performance. Kingflex products have passed rigorous test regimens, earning certifications such as:
Large-volume elastomeric foam shipping requires professional packaging to avoid permanent deformation. We pack our rolls and sheets in heavy-duty polyethylene bags or cardboard cartons, optimized for max volume in 40ft HQ containers. We prevent packaging failures during transit to ensure that our materials arrive on-site with their cell walls intact.
We provide transparent pricing based on raw material costs (NBR, PVC, and fire retardants) and volume. By working directly with us, you avoid middleman markups, helping control project budgets. Get in touch with our international sales department for a customized quote tailored to your project specs.
Direct feedback and process transparency from our international project partners.
We work closely with clients across sixty-six countries, providing clear updates from initial quote to final shipping container sealing. This open communication is supported by real-time order tracking, test sample verification, and detailed packaging checks.
Our customers appreciate this transparency, which helps them coordinate complex installation schedules on-site. Below are verified records of our client support, showing the process from dispatch to receipt.
Verified installations of Kingflex elastomeric materials in commercial, industrial, and petrochemical facilities.
Common questions from design engineers, specifying authorities, and procurement managers.
Closed-cell elastomeric pre-formed pipes and engineered sheets designed for demanding HVAC and industrial cold systems.
Beyond our primary closed-cell NBR/PVC elastomeric rubber foam sheets and rolls, we offer specialized material portfolios to meet diverse thermodynamic requirements.
For high-temperature processing (>150°C), our Rock Wool division produces panels and blankets that meet commercial fire barrier and industrial heat management requirements.
Rock Wool Insulation Board
Rock Wool Blanket
Kingflex