Kingflex
Discover our top-tier NBR/PVC closed-cell foam insulation products engineered for HVAC, acoustics, thermal shielding, and industrial pipelines.
Kingflex Insulation Co., Ltd. is a leading professional manufacturing and trading combo for thermal insulation systems. Our research, development, and advanced manufacturing headquarters are situated in Dacheng, China—historically recognized as the capital of green building materials. As an energy-saving, environmentally responsible enterprise, Kingflex seamlessly integrates research, development, state-of-the-art production, global sales, and engineering post-sale support.
Established by the prestigious Jinwei Group, which has commanded the thermal insulation landscape for more than 40 years since its founding in 1979, Kingflex stands as the pioneering thermal materials manufacturer north of the Yangtze River. We take energy conservation and consumption mitigation as our foundational operating principles, offering world-class insulation consultation and execution globally.
Our workforce is a highly cohesive assembly of engineers, research scientists, and international trade professionals. The Kingflex R&D department features 8 professional research engineers dedicated solely to polymer foaming technologies, thermal transfer modeling, and flame-retardant structural improvements. Supporting our operations are 6 professional international logistics & trade consultants and a dedicated production staff of 230 skilled industrial workers.
This powerful synergy enables us to achieve a steady annual production capacity exceeding 600,000 cubic meters. Consequently, Kingflex has earned formal designations as a primary verified supplier from the Ministry of Energy, the Ministry of Electric Power, and the Ministry of Chemical Industry.
Delve into the molecular science and advanced polymers that distinguish our products under demanding environmental pressures.
Our NBR/PVC blend uses a modified copolymerization process, forming a synthetic rubber foam with high polar nitrile content. This prevents structural degradation when exposed to hydrocarbons, oils, and grease over long lifespans.
With a closed-cell ratio exceeding 98%, our foam prevents moisture migration. The encapsulated dry air pockets retain their thermal resistance long-term, achieving a water vapor permeability resistance factor (μ) ≥ 10,000.
Incorporating halogen-free inorganic flame retardants and smoke suppressants, our foam meets BS 476 (Class 0/1) and UL94 V-0 safety standards. This self-extinguishing material minimizes toxic fume emission in fire scenarios.
| Parameter Description | Nitrile (NBR) / PVC Blend | Cryogenic & ULT Systems | Testing Methodology |
|---|---|---|---|
| Apparent Density | 40 to 55 kg/m³ | 55 to 70 kg/m³ | ASTM D1622 / ISO 845 |
| Thermal Conductivity (λ) | ≤ 0.034 W/m·K at 0°C | ≤ 0.028 W/m·K at -165°C | ASTM C518 / ISO 8301 |
| Water Vapor Permeability | ≥ 1.0 × 10¹&sup0; g/(Pa·s·m) | ≥ 2.5 × 10¹&sup0; g/(Pa·s·m) | ASTM E96 / EN 12086 |
| Service Temperature Limit | -40°C to +105°C | -200°C to +125°C | ASTM C411 / EN 14706 |
| Flame & Smoke Performance | Class 0 / Class 1 / V-0 | Flame Retardant self-extinct | BS 476 Part 6 & 7 / UL 94 / ASTM E84 |
From deep space to subsea pipelines, our elastomeric foam technology provides reliable performance across diverse sectors.
Our foam prevents condensation and thermal bridging in HVAC systems. It serves as standard insulation for chilled water pipes, condensate drains, ductwork, and ventilation systems in high-occupancy commercial and healthcare buildings.
Designed for ultra-low temperature (ULT) pipelines, liquefied gas lines, and petrochemical process terminals, our low-temperature elastomeric foam maintains structural flexibility down to -200°C, preventing stress fractures.
With sound absorption coefficients optimized for machinery rooms, acoustic enclosures, wall cavities, and transportation cabs, our open-cell and semi-closed cell variants effectively dampen structural and airborne noise.
To support global supply chains, the Kingflex facility features 5 computerized, automated continuous vulcanization extrusion lines. This integration eliminates human error and guarantees batch-to-batch consistency. Our factory runs on a digital-twin monitor system that manages foaming densities, cell distribution, and thickness tolerances in real time.
Our raw material supply chain relies on strategic partnerships with top elastomer suppliers. This protects Kingflex from market shifts, allowing us to maintain stable production lead times and pricing even during global supply line disruptions.
Every production shift is backed by rigorous testing. We maintain an in-house chemical analysis laboratory to evaluate rubber characteristics before processing. The output foam undergoes density profiling, water absorption tests, aging oven exposure, and continuous smoke density and flammability tracking in accordance with international standards.
This scientific approach ensures that every cubic meter of Kingflex insulation delivered to your project site performs to specification throughout its entire service life.
Our products are certified by international testing agencies, ensuring smooth regulatory approvals for your projects.
Certified Class 0 and Class 1 fire spread rating.
Meets European EN 14304 safety standards.
Eco-friendly formula, free of ozone-depleting substances.
Internationally audited quality management systems.
Choosing the correct elastomer density and thickness is critical for thermal optimization and preventing surface condensation.
Our thermal insulation sheet rolls are engineered for large-diameter pipelines, duct systems, flat surfaces, and irregular tanks. The elastomeric sheets offer high structural flexibility, simplifying installation around complex geometries.
Designed for easy installation over copper and steel pipes, Kingflex insulation tubes are extruded to precise tolerances. They provide high resistance to moisture condensation on chilled water lines.
International procurement managers must balance cost optimization with technical compliance and long-term reliability. Choosing Kingflex as your manufacturing partner in China helps mitigate risk in the following ways:
To prevent compression damage during transport, Kingflex uses heavy-duty, moisture-resistant packaging. Sheet rolls are wrapped in durable PE film, and tubes are packed in reinforced, double-wall corrugated cartons.
We work with global shipping lines to offer competitive FOB, CIF, or DDP delivery terms. Our logistics team handles all customs clearance documents, enabling efficient port processing and on-time delivery to your job site.
Get answers to common technical, structural, and procurement questions regarding our elastomeric rubber foam insulation products.
A1: It is primarily used for insulating HVAC ducts, air conditioning lines, hot and cold water pipes, building envelopes, and industrial process pipelines. Its main function is to prevent surface condensation on cold systems and minimize heat loss or gain on hot systems.
A2: Yes. Kingflex rubber foam insulation features built-in flame retardants and smoke suppressants. It achieves Class 0 and Class 1 fire spread ratings under BS 476 testing and meets UL94 V-0 flame criteria, ensuring compliance with global building codes.
A3: Rubber foam is a flexible, closed-cell, moisture-proof material, making it ideal for refrigeration, HVAC, and condensation-prone systems. Rock wool is an open-fiber mineral wool that withstands much higher temperatures, making it better suited for high-temperature industrial steam pipes and structural fireproofing.
A4: Yes. We offer comprehensive OEM/ODM services, including custom sizes, wall thicknesses, and special densities. We can also apply adhesive backings, protective coatings, or aluminum foil claddings to meet specific project demands.
A5: Kingflex products are certified to BS 476, CE, REACH, RoHS, UL94, and ASTM standards. This verification guarantees high material purity, safety, and performance compliance on projects worldwide.
A6: Yes. Every batch of Kingflex insulation is marked with a production tracking code. This allows us to trace the manufacturing date, shift, raw materials, and laboratory QC records for all shipments.
A7: We can manufacture sheet rolls in thicknesses ranging from 6mm to 50mm, allowing you to choose the exact thickness needed for your system's thermal requirements.
A8: Under normal indoor and outdoor operating conditions—and when protected from UV degradation and physical abuse—our insulation has a service life of 10 to 15 years.
Browse our specialized line of cryogenic, acoustic, and high-density elastomeric foams designed for severe industrial environments.
