Kingflex
Kingflex
Direct supply from state-of-the-art automatic production lines. Select a product line below to view configurations and request bulk pricelists.
In modern industrial architectural design, commercial ventilation, and process HVAC infrastructure, noise control has evolved from a secondary luxury to a strict regulatory prerequisite. High-velocity air transmission, compressor vibrations, mechanical turbulences, and fluid flow within metal duct networks generate substantial structure-borne and airborne acoustic energy. Left unmanaged, these vibrations propagate through interior spaces, compromising occupant well-being, structural stability, and equipment longevity.
Acoustic duct lagging represents the primary engineering standard to address these noise issues. By pairing a high-density sound barrier layer (such as mass-loaded vinyl or dense rubber polymer) with a flexible, porous decoupling backing (like elastomeric closed-cell or open-cell foam, or engineered rock wool), these composite sheets effectively absorb structural resonance and block acoustic transmission. Selecting the right factory supplier with specialized material science expertise is vital to achieving optimal acoustic performance, thermal control, and fire safety compliance simultaneously.
Deep-rooted industry lineage spanning over four decades in high-performance polymer engineering.
Kingflex Insulation Co., Ltd. is a professional manufacturing and trading combo for thermal and acoustic insulation products. Our R&D and main production facilities are located in Dacheng, China—the globally recognized capital of green building materials. As an energy-saving, environmental-friendly enterprise, we concentrate on the research, development, production, sales, installation guidance, and post-sale technical services of advanced insulation systems.
Kingflex was established under the Jinwei Group, which holds a historic background dating back to 1979. Over 40 years ago, Jinwei Group established the first manufacturing plant for high-performance thermal insulation materials north of the Yangtze River. This decades-long technical foundation forms the backbone of Kingflex's superior product formulation and consistent quality standard.
Our team is a tight-knit, highly qualified group shared by a unified vision of delivering world-class service to global contractors. Kingflex houses 8 dedicated professional engineers in our R&D Department, 6 international trade specialists, and over 230 highly trained operators in our manufacturing divisions to keep our factory output running flawlessly.
Currently, Kingflex runs 5 large fully automatic assembly lines. With an annual production capacity exceeding 600,000 cubic meters, we have achieved the status of a designated manufacturing partner for key state infrastructural bodies including the Ministry of Energy, the Ministry of Electric Power, and the Ministry of Chemical Industry.
Our products have been successfully exported to more than 66 countries globally over the past 16 years. Our manufacturing capability allows us to offer optimized lead times, highly competitive factory pricelists, and customized OEM and ODM solutions to meet various international engineering demands.
The convergence of building acoustics, fire safety regulations, and thermal energy efficiency in the B2B construction sector.
Standard architectural specifications are increasingly moving away from single-layer wrap designs. Today's commercial buildings utilize complex sandwich materials that layer mass-loaded vinyl (MLV) barrier coatings with elastomeric closed-cell rubber foam or open-cell soundproof structures. These composite wraps damp vibration, block acoustic breakthrough, and decouple metal work from surrounding structural walls.
Uninsulated or poorly insulated cold-air HVAC systems run a persistent risk of moisture condensation, which leads to rust, structural breakdown, and mold growth. Kingflex closed-cell NBR/PVC elastomeric rubber foam sheets provide a dual-purpose solution: they act as a reliable vapor barrier preventing condensation while offering high compression resilience to absorb acoustic vibration.
Modern building codes require structural elements to meet fire propagation standards. Standard rubber materials fail to meet these requirements under extreme temperatures. By combining low-conductivity elastomeric rubber materials with rock wool thermal blankets, industrial projects achieve Class A fire safety ratings (meeting BS 476, UL94, and ASTM requirements) along with thermal insulation.
In our advanced research and development department, Kingflex engineers continuously test chemical combinations to improve the elasticity and acoustic attenuation properties of NBR/PVC rubber sheet rolls. Our focus is on maximizing the closed-cell rate (which currently stands at over 98%) to ensure moisture protection and long-term thermal performance.
Through testing, we optimize the density range to 40-55 kg/m³ to provide the ideal balance between low weight, thermal resistance, and structure-borne sound isolation. Our product research helps keep our systems at the forefront of the global building materials industry.
Comprehensive physical parameters and dimensions for bulk wholesale estimation.
Designed primarily for large-scale central air conditioning air ducts, ventilation boxes, and large-diameter process pipelines. These sheets provide acoustic damping and prevent heat exchange.
| Parameter | Value / Range | Notes |
|---|---|---|
| Base Material | NBR (Nitrile Butadiene Rubber) / PVC Blend | Optimized elastomer formulation |
| Available Thickness | 6mm to 50mm | Precision calibration available |
| Density Range | 40 - 55 kg/m³ | Maintains acoustic barrier mass |
| Closed-Cell Rate | > 98% | Prevents vapor penetration |
| Service Temperature | -40℃ to 105℃ | Stable under harsh operational cycles |
| Compression Resilience | > 80% | Damps pipe structure vibration |
Designed for installation on HVAC lines, hot/chilled water loops, and chemical process piping. These pre-formed tubes limit heat transfer, manage condensation, and lower transmission of fluid flow noise.
| Specification Field | Details | Application Context |
|---|---|---|
| Internal Diameter (ID) | 6mm to 114mm | Standard global plumbing fit |
| Insulation Thickness | 9mm to 40mm | Determines thermal resistance and sound damping |
| Special Finish Option | Alum-Foil Facing / Custom Jackets | Enhanced mechanical protection & barrier effect |
| Moisture Factor | High resistance index | Critical for chilled water cooling lines |
Meeting global building regulations and commercial building acoustic standards.
Our materials undergo regular testing under BS 476 (Part 6 & 7) guidelines, achieving Class 0 / Class 1 performance certificates to meet strict public construction regulations.
Kingflex rubber foams are fully compliant with REACH and RoHS directives. Free from ozone-depleting substances, CFCs, HCFCs, and formaldehyde gases.
Certified under UL94 (V-0) and ASTM standards. The modified rubber properties stop active flames and self-extinguish when the flame source is removed.
Every raw material batch processed through our automated systems is assigned a barcode. This ensures full material traceability from raw chemical input to delivery.
Understanding cost structures is vital for global B2B procurement managers, quantity surveyors, and project estimators. Kingflex maintains transparent pricing based on configuration and order volume:
To request our current wholesale pricelist, contact our export division with your technical specifications, thickness requirements, and estimated project volume.
Driving green manufacturing technologies and low-carbon footprint polymers for future architectures.
Our long-term R&D path focuses on substituting traditional fossil-fuel derived raw materials with plant-based organic plasticizers. This reduces the carbon footprint of our elastomeric rubber foams without compromising physical elasticity or thermal insulation performance.
We are currently developing multi-layered structural wraps that feature sound-decoupling cores designed for high-amplitude low-frequency acoustic mitigation. These systems are optimized for data centers and specialized hospital ventilation lines.
By upgrading our automated warehousing system, Kingflex is streamlining packing and bulk shipment processes. This helps cut delivery times by up to 20% for our global distributors and partners.
Answers to common questions regarding elastomeric rubber foams, acoustic duct lagging, and global bulk supply specifications.
Select a product to view specifications and request bulk quotes.
Engineered products designed for low temperatures, industrial processes, and soundproofing.
Industrial scale and production quality from China's green-building material capital.
