Kingflex
Direct supply catalog from the flagship production line of Jinwei Group (40+ years history). Verified global standards compliant.
Within the rapidly evolving landscape of high-performance architectural systems and industrial processing facilities, noise pollution has emerged as a crucial regulatory, structural, and operational challenge. Airborne sound transmission from high-velocity air flows inside sheet-metal ducts, combined with structural vibrations, generates massive acoustic disturbances. Duct lagging, specifically utilizing high-density, elastomeric NBR/PVC closed-cell technologies combined with decoupling layers, serves as the defense line to isolate this system noise.
Modern commercial specifications demand multi-functional insulation materials that handle both acoustic dampening (STC ratings) and thermal control (preventing heat gain/condensation) in a single product. As major projects seek to lower building energy foot-prints and achieve LEED, BREEAM, or local safety compliance certifications, the reliance on high-quality elastomeric duct insulation becomes non-negotiable.
A flagship enterprise of the Jinwei Group, shaping the development of the global thermal and acoustic insulation industry.
Kingflex Insulation Co., Ltd. is a professional manufacturing and trading combo for high-end thermal and acoustic insulation systems. Our state-of-the-art research, development, and industrial production facilities are situated in Dacheng, China—widely recognized as the national capital of advanced green-building materials.
We operate as a highly integrated energy-saving, environmentally friendly enterprise. Our strategic foundation was established by Jinwei Group, which commands a legendary history of more than 40 years. Founded in 1979, Jinwei Group was the first pioneer manufacturer of thermal insulation materials north of the Yangtze River, paving the way for China's modern eco-building materials sector.
Our workforce constitutes a tight-knit, talented group bound together by a shared vision of providing first-class engineering services to our global clients. Kingflex houses 8 senior professional R&D engineers, 6 dedicated international trade consultants, and over 230 experienced production operators.
Currently, our facility operates 5 large automatic assembly lines, generating an annual capacity exceeding 600,000 cubic meters. Kingflex is designated as a verified supplier and manufacturing partner by key municipal and national departments of Energy, Chemical Industry, and Electric Power.
High-precision physical properties and testing standards for mechanical engineering designers and HVAC specifiers.
| Property Parameter | NBR/PVC Elastomeric Foam Sheet Roll | Elastomeric Foam Insulation Pipe / Tube | Testing Methods / Standards |
|---|---|---|---|
| Material Formulation | Closed-cell Nitrile Butadiene Rubber (NBR) / PVC blend | NBR / PVC co-extruded synthetic rubber | ASTM D1667 / ISO Standards |
| Available Thickness Range | 6mm to 50mm | 9mm to 40mm (Inner Diameter: 6mm - 114mm) | Standard Direct Calibration |
| Foam Density Range | 40 - 55 kg/m³ | 40 - 55 kg/m³ | ASTM D1622 / ISO 845 |
| Operating Service Temperature | -40℃ to 105℃ (Ultra-Low cryogenic series available) | -40℃ to 105℃ | ASTM C411 |
| Closed-Cell Rate | > 98% even micro-cellular foam structures | > 98% even micro-cellular structures | ASTM D2856 |
| Water Vapor Permeability | Highly resistant. Moisture resistance factor μ ≥ 10,000 | Highly resistant. Moisture resistance factor μ ≥ 10,000 | BS EN 12086 / ASTM E96 |
| Fire Protection Performance | Flame retardant, self-extinguishing, Class 0 rating | Flame retardant, self-extinguishing, Class 0 rating | BS 476 Part 6 & 7, CE, UL94, ASTM E84 |
Our foaming technology achieves an even density profile with a closed-cell rate exceeding 98%. This blocks moisture ingress and prevents condensation, securing the insulation's structural integrity for decades.
Meets Class 0 and Class 1 standards (BS 476). Designed to suppress smoke development and auto-extinguish upon removal of external fire sources, aligning with strict B2B architectural specifications.
Maintains a compression resilience rate over 80%. This prevents structural thin spots around joints, hangers, and pipe elbows, preserving long-term performance.
Our products pass international inspections to confirm fire safety, chemical compliance, and thermodynamic efficiency.
Kingflex insulation sheets, tube products, and composite acoustic systems undergo regular testing to meet strict international standards, including BS 476, CE, REACH, ROHS, UL94, and ASTM. This guarantees safety, performance, and complete regulatory compliance for global B2B procurement projects.
B2B custom fabrication, project logistics, and specialized integration guidelines.
We understand that modern industrial systems require tailored specifications. Kingflex provides comprehensive OEM services, including custom sheet thicknesses from 6mm to 50mm, varied density controls (40-55kg/m³), and adhesive or foil backings (such as reinforced aluminum foil) to simplify installation and protect against mechanical wear.
Our dedicated team of 8 R&D engineers collaborates directly with mechanical contractors and system designers, providing structural support to ensure products meet your precise project requirements.
Explore our industrial application photos demonstrating actual installations in modern buildings and systems.
Technical guidance straight from our R&D engineering department.
Explore the full product catalog from Kingflex, covering everything from closed-cell sheet rolls to sound-absorbing acoustic foams.
Whether you require standard mechanical configurations or highly customized acoustic dampening solutions, our R&D team is ready to assist. Contact us today for technical specifications, product catalogs, and wholesale pricing tables.
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