Kingflex
Kingflex
Explore our engineering-grade closed-cell elastomeric rubber foam insulation series for high-demand temperature systems.
In today's fast-evolving industrial landscape, thermal management optimization is no longer just about cost control—it is a critical pillar of environmental compliance and energy efficiency. From cryogenic LNG storage terminals requiring stability at -196°C to high-velocity HVAC systems in hyper-scale commercial buildings, selecting the right elastomeric nitrile rubber foam is paramount.
The global thermal insulation market faces demanding challenges: condensation mitigation in high-humidity zones, fire safety compliance under rigorous local codes, and acoustic attenuation in urban mechanical rooms. Kingflex meets these demands by producing closed-cell structural foams with a non-polar polymer backbone that resists moisture intrusion, significantly outperforming conventional fibrous materials.
Tracing back to 1979: Leading the thermal insulation industry in North China for over four decades.
Established under the prestigious Jinwei Group (founded in 1979), Kingflex Insulation Co., Ltd. has developed into a dominant manufacturer and strategic trading consortium. We were the pioneering force in manufacturing thermal insulation materials north of the Yangtze River, changing the trajectory of China's modern green building infrastructure.
Strategically headquartered in Dacheng, China—the undisputed capital of green-building materials—our state-of-the-art facility utilizes five high-speed automated extrusion and vulcanization lines. This large-scale configuration guarantees an annual output surpassing 600,000 cubic meters, making us the preferred supplier designated by the Ministry of Energy, the Ministry of Electric Power, and the Ministry of Chemical Industry.
At the heart of Kingflex's market leadership is a collaborative team combining technical brilliance and commercial agility. Our specialized Research & Development division features 8 senior chemical and mechanical engineers dedicated to formula modernization and acoustic optimization.
Supported by 6 global accounts managers and a manufacturing team of 230 technicians, we deliver end-to-end services. This spans material consultation, formula design, customized product packaging, shipping logistics, and post-sale installation supervision.
How our localized ecosystem in Dacheng translates to unmatched price-performance ratios for global buyers.
Being based in Dacheng gives Kingflex immediate, priority access to bulk chemical feeds (NBR, PVC, flame retardants, blowing agents). Our localized ecosystem minimizes domestic transit times and shields our supply chains from global material pricing spikes.
Our five continuous production lines are heavily integrated with automated sensors that control density, vulcanization temperature, and foaming rates. By removing human error, we improve yield quality and decrease unit energy consumption by 15%.
Our proximity to Tianjin Port and major North China shipping lanes allows us to easily handle high-volume ocean container dispatching. We offer streamlined packing options (compact compression rolls) to minimize sea freight costs.
Comprehensive engineering metrics of Kingflex NBR/PVC closed-cell elastomeric thermal insulation materials.
| Property / Characteristic | NBR/PVC Elastomeric Foam Sheet | NBR/PVC Elastomeric Foam Pipe | Testing Methods / Standards |
|---|---|---|---|
| Foaming Structure | Closed-cell rate > 98% | Closed-cell rate > 98% | ASTM D1667 / ISO 4590 |
| Nominal Density | 40 - 55 kg/m³ | 40 - 55 kg/m³ | ASTM D1622 / EN 13470 |
| Thermal Conductivity (λ) | ≤ 0.035 W/(m·K) at 0°C | ≤ 0.034 W/(m·K) at 0°C | ASTM C518 / EN 12667 |
| Water Vapor Permeability (μ) | ≥ 10,000 (moisture resistant) | ≥ 10,000 (moisture resistant) | ASTM E96 / BS EN 12086 |
| Service Temp. Range | -40°C to +105°C (up to 125°C intermittent) | -40°C to +105°C | ASTM C411 / EN 14707 |
| Fire Reaction | Class 1 / Class 0 Flame Retardant | Flame Retardant, Self-Extinguishing | BS 476 Part 7 / UL 94 V-0 / ASTM E84 |
| Acoustic Performance | Up to 32 dB Sound Transmission Loss | Excellent structural damping | ASTM C423 / ISO 354 |
Tailored configurations optimized to survive harsh, real-world operational environments.
At sub-zero temperatures (down to -196°C), standard insulation materials embrittle and fail. Kingflex Cryogenic elastomeric rubber foam series retains its elasticity, preventing micro-fractures in liquid natural gas (LNG) pipe assemblies. Multiple layers of our flexible sheet system control condensation and minimize heat transfer, preventing safety hazards.
In central air conditioning units, condensation on cold ducts causes water damage and mold growth. Our closed-cell rubber foam insulation pipes and sheet rolls act as an integrated vapor barrier. With an anti-condensation structure, Kingflex ensures systems in hotels, hospitals, and shopping malls operate reliably and maintain air quality.
Heavy mechanical equipment, generators, and large fluid pumps generate airborne noise. Using open-cell flexible acoustic insulation sheets from Kingflex on wall panelings and duct linings converts sound energy into heat energy, reducing noise levels to meet urban environmental standards.
How we ensure global E-E-A-T standards with verifiable laboratory testing and certification pathways.
To maintain strict quality control, Kingflex materials are regularly tested by third-party testing institutions. Our foam products are fully certified and compliant with the following global standards:
Positioning Kingflex at the forefront of sustainable and high-performance insulation technologies.
Kingflex is actively researching green polymers to replace traditional PVC and petroleum-based nitrile rubbers. By incorporating bio-based polyols and eco-friendly foaming agents (zero ODP, extremely low GWP), we aim to launch a completely biodegradable elastomeric foam series within the next three years.
To push thermal conductivity limitations, our R&D team is testing the fusion of silica aerogels into the micro-cell walls of NBR foam. This hybrid technology will decrease the thermal conductivity (λ) to under 0.026 W/(m·K), providing superior insulation thickness profiles for tight spaces in aircraft cabin designs and cleanroom environments.
Direct communication and operational proof of Kingflex's global supply efficiency and customer satisfaction.
Proven durability across key commercial, residential, and municipal projects worldwide.
A closer look inside the Kingflex production line, QA processes, and inventory warehouses.
Direct answers from our senior R&D engineers on elastomeric nitrile rubber and project installations.
Elastomeric rubber foam is a flexible, closed-cell insulation material based on NBR/PVC. It is primarily used for insulating HVAC ductwork, hot and cold water pipelines, VRF systems, industrial process piping, cryogenic installations (like LNG systems), and acoustic damping in mechanical rooms. Its closed-cell structure prevents moisture ingress, protecting systems from corrosion under insulation (CUI).
Yes. Kingflex rubber foam contains specialized halogenated and non-halogenated flame retardants that meet global fire safety standards, including BS 476 Parts 6 & 7 (Class 0 and Class 1), UL94 (V-0 rating), and ASTM E84. Our products are self-extinguishing and do not generate flaming droplets during combustion, ensuring occupant safety.
Rubber foam is a flexible, closed-cell elastomeric material with an integrated water vapor barrier, making it ideal for refrigeration, HVAC, and condensation control. Rock wool is a fibrous mineral-based material that withstands higher temperatures (over 1000°C) and is excellent for industrial steam pipes and high-temperature fire stops. However, rock wool lacks built-in moisture protection and requires an external vapor barrier to prevent water absorption.
Yes, Kingflex offers comprehensive OEM services. We can customize density profiles, inner and outer tube diameters, wall thicknesses (from 6mm up to 50mm), surface laminations (such as direct aluminum foil cladding or self-adhesive backings), and provide customized packaging designs to meet specific project needs.
Our products have passed BS 476, CE, REACH, RoHS, UL94, and ASTM testing standards. Our manufacturing lines run under an ISO 9001:2015 quality management system, ensuring compliance with global specifications.
Yes. Every production run is printed with an inkjet code detailing the product line, batch ID, manufacture date, and inspector number. This provides full quality traceability from the raw material batch to the end-user site.
We produce rubber foam sheets in thicknesses ranging from 6mm up to 50mm. For thicknesses greater than 50mm, we recommend multi-layer installations using Kingflex 520 specialized adhesive to ensure structural stability and avoid internal thermal bridging.
When installed correctly and used within recommended operating temperatures (-40°C to +105°C), Kingflex rubber foam insulation has a service life of 10 to 15 years. For outdoor installations, we recommend using protective coatings or aluminum cladding to shield the foam from UV degradation.
Complete your insulation system with our specialized open-cell soundproofing panels, aluminum foil laminates, and high-strength adhesives.
