Kingflex
Explore our flagship industrial-grade rubber foam sheets, rolls, tubes, and cryogenic systems engineered for demanding temperature controls.
Kingflex Insulation Co., Ltd. stands as a premier professional manufacturing and trading combo specializing in thermal insulation systems. Strategically located in Dacheng, Langfang—widely recognized as China's green-building materials capital—our energy-saving, environmentally conscious enterprise integrates R&D, advanced manufacturing, global sales, and engineering consultation.
Under the operational doctrine of "energy saving and consumption reduction," Kingflex delivers comprehensive insulation solutions. We provide deep technical consulting, rigorous material R&D, scale-optimized production, and expert installation guidance to optimize global building materials supply chains.
Flexible Elastomeric Foam (FEF) insulation composed of a Nitrile Butadiene Rubber (NBR) and Polyvinyl Chloride (PVC) matrix is preferred for architectural and industrial piping systems. Kingflex’s continuous foaming technology ensures a closed-cell rate exceeding 98%. By creating millions of isolated, micro-structured gas pockets, the material maintains its initial thermal properties over time.
Unlike open-cell materials like fiberglass or mineral wool, the closed-cell configuration of NBR/PVC prevents moisture ingress, which can degrade thermal efficiency. Water vapor cannot easily penetrate the continuous rubber membranes, ensuring long-term thermal performance even in high-humidity applications.
The primary index of insulation performance is its thermal conductivity coefficient ($\lambda$). Kingflex Standard Black Rubber Foam displays a low thermal conductivity rating:
When moisture enters an insulation material, the thermal conductivity rises because the thermal conductivity of water ($0.6$ W/m·K) is significantly higher than that of air ($0.024$ W/m·K). Since Kingflex contains a high density of closed cells, it restricts moisture ingress and prevents loss of insulation efficiency, which supports energy-efficiency goals in commercial and industrial settings.
Excellent resistance factor prevents condensation on cold refrigeration lines.
Flame retardant compound meets BS 476, UL94, and ASTM fire standards.
Elastomeric density reduces vibration and structural noise transmission.
Our parent entity, the Jinwei Group, established its initial factories in 1979. As the first thermal insulation manufacturer north of the Yangtze River, this heritage supports our current quality control practices. We combine generations of engineering experience with modern, high-speed automated extrusion and vulcanization lines.
Our facilities house 5 automated lines that run continuously. This level of automation supports dimensional consistency and uniform density across large production runs, meeting the supply chain requirements of international contractors and industrial distributors.
In addition to standard black rubber foam, we develop specialty items, including cryogenic flexible systems for ultra-low temperature environments (-200°C to -40°C) and halogen-free elastomeric sheets for marine and rail transport installations.
Comprehensive engineering criteria for design, procurement, and site planning.
| Physical Property | Standard Reference | NBR/PVC Elastomeric Sheet Roll Value | NBR/PVC Tube/Pipe Value |
|---|---|---|---|
| Density Range | ASTM D1622 / ISO 845 | 40 - 55 kg/m³ | 40 - 55 kg/m³ |
| Thermal Conductivity ($\lambda$) | ASTM C177 / EN ISO 8497 | ≤ 0.034 W/m·K at 0°C | ≤ 0.034 W/m·K at 0°C |
| Water Vapor Permeability ($\mu$) | ASTM E96 / EN 12086 | ≥ 10,000 | ≥ 10,000 |
| Service Temperature Range | - | -40°C to +105°C | -40°C to +105°C |
| Fire Performance | BS 476 Part 6 & 7 / UL 94 | Class 0 / Class 1 / V-0 | Class 0 / Class 1 / V-0 |
| Compression Resilience | ASTM D1056 | ≥ 80% | ≥ 80% |
| Available Thicknesses | - | 6mm to 50mm | 9mm to 40mm (ID: 6mm-114mm) |
Kingflex sheet rolls and tubes are used to insulate commercial ductwork and chilled water piping. The high resistance to moisture vapor helps prevent condensation on refrigeration lines, protecting ceilings and equipment from water damage.
For liquid gas pipelines and petrochemical installations operating at temperatures down to -200°C, Kingflex cryogenic systems provide cold-conservation barriers. Their flexibility at low temperatures reduces thermal stress cracking.
The dense, viscoelastic properties of our NBR/PVC panels absorb sound energy across low and mid frequencies. Applications include gym vibration-damping pads, machinery enclosures, and drywall soundproofing overlays.
Our research and development team, consisting of 8 professional chemical and mechanical engineers, works to optimize raw material formulations to meet international environmental regulations. All materials comply with REACH, RoHS, CE, UL94, ASTM, and BS 476 certifications.
We maintain full batch traceability from raw material selection through vulcanization to packing and shipping. Testing equipment inside our lab validates every production batch for density, fire resistance, and dimensional tolerance before dispatch.
Black Rubber Foam Insulation Sheet Roll
Black Rubber Foam Insulation Pipe
Essential information for global engineers, specifiers, and procurement managers.
It is mainly used for HVAC ducts, air conditioning pipes, building thermal insulation, industrial pipeline cold insulation, and sound insulation. The elastomer matrix provides flexural durability and long service life across variable thermal ranges.
Yes, our rubber foam insulation products are fire retardant. They are developed to meet safety standards for commercial and industrial projects, including BS 476 (Class 0 and Class 1), UL94 (V-0 rating), and ASTM flame/smoke criteria.
Rubber foam is flexible, closed-cell, and moisture-proof, which helps prevent condensation on cold piping systems like HVAC. Rock wool is a fibrous material with high-temperature resistance and fire protection properties, typically used for high-temperature industrial steam piping systems.
Yes, we support OEM/ODM services. We can customize density, wall thickness (6mm to 50mm), pipe diameters (ID 6mm to 114mm), and supply specialty finishes such as aluminum foil laminates or self-adhesive backings.
Our insulation products are certified to international standards including BS 476, CE, REACH, RoHS, UL94, and ASTM. This documentation supports import compliance and project approval in various global markets.
Yes. Every production batch of Kingflex insulation is marked with a batch number code. This allows us to trace raw materials, production metrics, and lab test results to maintain consistent quality control.
We can manufacture continuous rubber foam sheet rolls in thicknesses ranging from 6mm to 50mm, allowing for tailored single-layer application thickness based on calculations for dew-point prevention.
Under typical indoor and outdoor operating conditions—provided it is installed correctly and protected from direct weathering when outdoors—Kingflex rubber foam has an expected service life of 10 to 15 years.
The black color is primarily due to the addition of carbon black during the formulation process. Carbon black acts as a physical stabilizer that provides resistance to ultraviolet (UV) radiation and oxidation, which helps protect the polymer matrix over time.
The viscoelastic properties of NBR/PVC enable the material to absorb sound waves and damp structure-borne vibrations. It is used as a decoupling layer in partition walls, gym floor systems, and mechanical plant rooms to reduce noise transmission.
Specialized thermal barriers designed for ultra-low temperature cryogenic environments, pipelines, and sound attenuation panels.
