Kingflex
Explore Kingflex's engineering-grade closed-cell thermal and acoustic insulation materials, optimized for heavy equipment and HVAC systems.
Industrial generator sets (gensets) generate extreme levels of noise pollution, combining high-frequency combustion crackle, mid-frequency cooling fan turbulence, and low-frequency structural vibration. Standard polyurethane foams fail under these conditions due to poor thermal limits and vulnerability to petrochemical vapors.
Kingflex elastomeric closed-cell sound absorbing materials are engineered with an dense, cellular matrix. This design intercepts sound waves, converting acoustic energy into minimal thermal energy through viscous friction within the cell walls. With a density profile calibrated between 40-55 kg/m³, our mats provide targeted attenuation in the critical 125 Hz to 2000 Hz frequency bands.
From the heart of Dacheng, China’s green building materials capital, Kingflex serves critical global industries.
Annual Production Capacity
Established by Jinwei Group
Global Export Countries
R&D Engineers / Skilled Labor
Kingflex Insulation Co., Ltd. is a professional manufacturing and trading combo for thermal and acoustic insulation products. Backed by the Jinwei Group—a pioneer founded in 1979 as the first thermal insulation manufacturer north of the Yangtze River—we focus on energy conservation, noise reduction, and structural protection.
Currently, our facility operates 5 large automatic assembly lines, designated as approved vendors by the Ministry of Energy, Ministry of Electric Power, and Ministry of Chemical Industry in China. We support generator OEMs worldwide with tailored material parameters, ensuring our acoustic dampening mats meet strict thermal and fire safety regulations.
View Adhesive Roll SolutionsDetailed performance parameters for engineering design, noise barrier modeling, and compliance checking.
| Characteristic / Property | NBR/PVC Elastomeric Foam Specification | Test Standard / Certification Reference |
|---|---|---|
| Thickness Range | 6mm to 50mm (Customizable sheets & rolls) | ASTM C518 / ISO 845 |
| Density Profile | 40 kg/m³ to 55 kg/m³ | GB/T 6343 / ASTM D1622 |
| Service Temperature Limit | -40℃ to +105℃ | ASTM C411 |
| Closed Cell Structure | > 98% even closed micro-cells | ASTM D2856 |
| Thermal Conductivity (λ) | ≤ 0.034 W/(m·k) at 0℃ | ASTM C177 / ISO 8301 |
| Fire & Flame Retardancy | Class 0 / Class 1; Self-extinguishing off fire | BS 476 Part 6 & 7 / UL94 V-0 / ASTM E84 |
| Compression Resilience | > 80% recovery after deformation | GB/T 6669 |
| Moisture Resistance Factor | μ ≥ 10,000 (Built-in vapor barrier) | EN 12086 / ASTM E96 |
Different jurisdictions impose distinct regulatory limits on generator installations. While European urban zones require strict noise control under EU Directive 2000/14/EC, North American installations focus heavily on fire safety codes governed by NFPA 110 and UL94 testing.
With localized warehouse readiness and certifications, Kingflex supports global generator manufacturers in securing hassle-free compliance clearances from local building inspectors and environmental protection agencies.
Why generator OEMs globally source raw elastomeric materials directly from Kingflex's integrated manufacturing hub.
We source high-grade NBR and PVC polymers locally, compounding them in-house. This minimizes supply chain volatility and guarantees consistent material density and cell structure across high-volume wholesale orders.
Generator canopies require complex geometric shapes to accommodate air intakes, exhaust ports, and access doors. Kingflex offers custom die-cutting and laminated pressure-sensitive adhesive (PSA) backings to speed up assembly line installation.
Located near the Beijing-Tianjin corridor, we utilize optimized freight routes to Tianjin Port, ensuring reliable shipping schedules and cost-efficient container rates for global buyers.
How Kingflex insulation materials are deployed across different genset configurations and operating environments.
Fitted directly to the interior steel or aluminum panels of weather-proof generator canopies. The high density of our rubber-plastic sheet acts as a structural mass-barrier, dampening panel resonance and blocking internal engine noise.
Generator cooling fans draw large volumes of air, creating high-velocity aerodynamic noise. Lined within air intake and outlet bends, Kingflex sound mats absorb air turbulence energy without decomposing under high pressure or wind shear.
To prevent structure-borne noise from transmitting to the building floor or chassis, Kingflex closed-cell rubber serves as a decoupling isolator under generator frames and base plates, absorbing low-frequency mechanical energy.
Using a combination of Kingflex rubber foam insulation pipe and high-temperature Rock Wool blankets, manufacturers insulate the high-heat exhaust system, preventing thermal radiating loads inside the acoustic canopy.
For demanding applications (e.g., hospital standby generators), Kingflex products can be laminated with mass-loaded vinyl (MLV) and aluminum foil. The foil surface protects against oil sprays, cleanable by simple wiping, while the MLV boosts the Sound Transmission Class (STC) rating.
Explore Sound PanelsUnderstanding the variables that shape bulk procurement costs for generator manufacturers.
We supply material thicknesses from 6mm to 50mm. Standard 10mm-20mm sheets are typical for canopy lining, whereas thicker 40mm-50mm options are selected for high-intensity low-frequency dampening. Pricing scales directly with the volume of NBR/PVC polymer compound per square meter.
Applying self-adhesive backing (acrylic-based pressure-sensitive adhesive) at our factory reduces application times on your assembly line. Adding protective layers, such as fiberglass scrim or aluminum foil, changes the base cost but improves durability and cleanability.
Our pricing model supports tier-based pricing. Full Container Load (FCL) orders benefit from optimized loading configurations, maximizing roll volume while minimizing cubic-meter sea freight costs. We offer custom container packing strategies to protect materials from compression damage during long ocean transits.
Ensuring every shipment matches international standards through rigorous testing and documentation.
Our QC laboratory checks every raw material batch for density, cell consistency, and flame retardancy. Kingflex maintains 8 R&D engineers focused on optimizing formulation resilience, keeping our materials durable when exposed to fuel vapor and high temperatures.
We supply material traceability certificates with every shipment, allowing generator manufacturers to confirm that the insulation installed on their machines complies with relevant fire and acoustic performance standards.
Our commitment to clarity extends from technical specifications to customer support. We maintain transparent communications regarding lead times, shipping arrangements, and custom clearance documentation.
We work closely with shipping agencies to optimize container volumes, helping to control landed costs and maintain margins on large-scale generator production runs.
Answering common questions about the application, performance, and sourcing of Kingflex rubber foam insulation.
A1: It is mainly used for HVAC ducts, air conditioning pipes, building thermal insulation, industrial pipeline cold insulation, and sound insulation. Within generator configurations, it acts as a primary canopy lining for sound absorption, structural vibration dampening, and compartment thermal containment.
A2: Yes, our rubber foam insulation products are fire retardant, meeting BS 476 (Class 0 and Class 1), UL94 V-0, and ASTM E84 safety standards, making them suitable for commercial building systems and industrial applications.
A3: Rubber foam is flexible, closed-cell, and moisture-proof, suitable for HVAC, building insulation, and direct noise dampening in generators. Rock wool is high-temperature resistant and fireproof, making it suitable for high-heat areas like exhaust pipes and steam lines.
A4: Yes, we offer OEM services. We can supply custom thicknesses, roll widths, sheet sizes, and self-adhesive or foil laminations to meet specific manufacturing requirements.
A5: Our products have passed BS 476, CE, REACH, RoHS, UL94, and ASTM certifications, ensuring compliance with global regulatory and safety standards.
A6: Yes, all Kingflex products have full manufacturing traceability. Batch codes are printed on packaging and materials, allowing us to track the production history and quality control records back to the raw material stage.
A7: We produce thicknesses ranging from 6mm to 50mm, allowing generator manufacturers to select the appropriate thickness for their specific sound absorption and thermal goals.
A8: The typical service life of our elastomeric foam is 10 to 15 years in standard indoor and sheltered outdoor environments, thanks to its moisture resistance and structural stability.
A9: Polyurethane foam is open-celled, meaning it absorbs moisture, oil mist, and fuel vapor, creating a fire hazard. Kingflex NBR/PVC is closed-cell (>98%), resisting liquid penetration. It also offers superior resistance to weathering, diesel vapors, and oil splashes.
A10: Yes, we use specialized acrylic adhesive backings rated for continuous exposure to temperatures up to 90℃-100℃. For higher temperature areas near the engine block, mechanical fastening is recommended alongside the adhesive.
Complete your procurement cycle with our range of specialty thermal tapes, halogen-free tubing, and low-temperature elastomeric materials.
