Discover our core line of premium foam rubber insulation rolls, sheet materials, and custom flexible tubes manufactured to meet stringent international standards.
The global construction and mechanical insulation sectors are undergoing a paradigm shift. Driven by strict energy conservation targets, global regulations, and structural green building programs (such as LEED, BREEAM, and DGNB), the demand for high-performance NBR/PVC closed-cell elastomeric foam rubber has scaled exponentially. Unlike traditional open-fiber insulation materials, modern foam rubber offers an integrated barrier system, eliminating the need for separate vapor jackets.
Today's market demands more than basic thermal performance. Modern B2B buyers look for advanced technological formulations featuring non-toxic smoke outputs, low volatile organic compound (VOC) emissions, and extreme resistance to moisture intrusion. The rise in HVAC configurations for commercial skyscrapers and advanced cold-chain shipping logistics means thermal products must maintain reliable operations across deep temperature gradients, from cryogenic applications to warm water lines.
Technical capabilities of Kingflex NBR/PVC rubber foam insulation solutions built for severe architectural environments.
| Technical Characteristic | Standard Value / Rating |
|---|---|
| Material Composition | NBR/PVC Elastomeric Nitrile Foamed Blend |
| Structure | >98% Closed-Cell Matrix |
| Density Profile | 40 - 55 kg/m³ |
| Thermal Conductivity (λ at 0°C) | ≤ 0.034 W/(m·K) |
| Moisture Permeability Factor (μ) | ≥ 10,000 |
| Service Temperature Range | -40°C to +105°C (Cryogenic variants up to -200°C) |
| Fire & Flammability Certifications | BS 476 Part 6 & 7 (Class 0/1), UL94, CE, ASTM |
| Environmental Conformity | REACH, RoHS, Low VOC emission |
Our foam rubber rolls undergo a continuous chemical vulcanization process that builds a uniform closed-cell network. The integration of high-density nitrogen bubbles effectively restricts air convection pathways, ensuring a low and stable thermal conductivity coefficient over decades of operation.
This closed-cell density is key to preventing Condensation Under Insulation (CUI). In chilled systems, moisture can migrate through open-fiber materials, reducing thermal resistance and causing pipe corrosion. Kingflex's high water vapor diffusion resistance index (μ ≥ 10,000) blocks vapor ingress even under severe humidity conditions, maintaining structural integrity and insulation performance.
Established as an core subsidiary of the Jinwei Group (founded in 1979, the pioneer of thermal insulation systems north of the Yangtze River with over 40 years of industrial presence), Kingflex Insulation Co., Ltd. has grown into a leading international manufacturing and trading combo.
Our production facilities are situated in Dacheng, China—widely recognized as the green building materials capital of the region. Today, Kingflex features 5 automated extrusion and expansion assembly lines with an annual production capacity exceeding 600,000 cubic meters. This scale allows us to serve as a designated material partner for the Ministry of Energy, Ministry of Chemical Industry, and Ministry of Electric Power.
Our R&D division has 8 professional engineers dedicated to refining polymer matrices and flame retardants. Supported by 6 international service representatives, we offer direct end-to-end support to mechanical contractors and procurement teams globally.
Providing engineered solutions across HVAC, industrial process engineering, cryogenic environments, and acoustics.
We supply custom-thickness insulation rolls for massive air handling units (AHU), variable air volume (VAV) components, and duct systems. The flexible material minimizes thermal transmission and absorbs airflow vibrations, keeping noise generation within acceptable limits.
Key benefit: High condensation resistance prevents dripping in hot and humid commercial building projects.
Designed for ultra-low temperature applications (down to -200°C), our cryogenic systems manage extreme thermal stress in LNG processing, petrochemical storage, and medical fluid lines. They prevent crystallization, control structural contraction, and protect pipe assemblies from freeze-damage.
Key benefit: High elastic recovery maintains flexibility under sub-zero conditions.
Utilizing high-density, viscoelastic structures, Kingflex shock-absorbing pads and rolls are widely deployed in commercial gymnasiums, industrial mechanical spaces, and recording rooms. The open-and-closed hybrid cell structures dissipate sound waves and reduce structure-borne noise.
Key benefit: Significantly dampens low-frequency vibrations from heavy machinery.
Our commitment to quality is supported by a comprehensive quality control framework. Every production batch of NBR/PVC insulation sheets undergoes real-time testing, including checking the thermal conductivity index via heat flow apparatus, fire testing using flame propagation combustion chambers, and aging tests in environmental chambers.
We work closely with global certification bodies (SGS, TUV, and Intertek) to ensure our product lines meet safety and performance standards worldwide. This documentation supports project approvals for design engineers and construction managers.
Material base: High-grade Nitrile-Butadiene Rubber combined with Polyvinyl Chloride (NBR/PVC)
Foam thickness: 6mm to 50mm (Custom runs supported for large orders)
Applicable density range: 40 to 55 kg/m³
Duct application width: 1m, 1.2m, and 1.5m standard rolls
We design and manufacture our products to meet strict international standards, ensuring smooth customs clearance and project approvals.
ISO 9001:2015 QC
BS 476 Class 0 / 1
UL 94 & ASTM Standards
CE & RoHS Compliance
Verified correspondence and project feedback from global engineering partners demonstrating our commitment to quality.
For B2B procurement heads, mechanical design engineers, and commercial HVAC distributors, securing a reliable supply chain is critical. Kingflex manages supply chains through structured OEM/ODM options, customizable branding, and trace-labeled packaging.
We provide localized engineering support by offering guidance on local building codes, calculating insulation thicknesses to prevent condensation, and providing site manuals for challenging installations. Whether dealing with high-humidity marine conditions in Southeast Asia or freezing environments in Northern Europe, our products are engineered to perform reliably.
Our research and development team is focused on three primary areas for the next generation of insulation products:
Kingflex products are used in major construction and engineering projects across more than 66 countries.
Technical support, material properties, and procurement guidelines for engineers and builders.
Specialized formulations including high-density materials, cryogenic wraps, and heavy industrial insulation tubes.
Kingflex