Kingflex Kingflex

Wholesale Closed Cell Flexible Elastomeric Foam Insulation Supplier & Factories

Direct from China's Premier Energy-Saving Manufacturing Complex: Engineering Thermal Integrity, Condensation Barriers, and Acoustic Suppression for Global Infrastructure.

The Engineering Physics Behind Closed-Cell Technology

Understanding how NBR/PVC matrix structure delivers unprecedented thermal and moisture barrier efficiency.

Micro-Cellular Density

By leveraging an engineered NBR (Nitrile Butadiene Rubber) and PVC blend, our manufacturing system cures foam with a closed-cell percentage exceeding 98%. This dense cell matrix traps microscopic pockets of dry air, suppressing convective thermal currents and minimizing structural heat loss.

Integrated Vapor Barrier

Unlike open-cell materials or fibrous blankets that require secondary protective jackets, Kingflex elastomeric foam possesses an inherently high resistance to water vapor transmission. With a permeability index (μ) ≥ 10,000, it prevents moisture absorption that leads to mold growth and pipe corrosion.

Advanced Fire Safety

Safety compliance is critical in public infrastructure projects. Kingflex insulation matches global building safety criteria, achieving BS 476 Class 0 and flame retardant UL94 classifications. This results in self-extinguishing properties, extremely low flame spread index, and minimal smoke toxicity.

Kingflex Insulation Co., Ltd.

A Division of Jinwei Group (Established 1979)

Kingflex Insulation Co., Ltd. is a professional manufacturing and trading combo for thermal insulation products. Our research, development, and state-of-the-art production department are located in Dacheng, China—widely recognized as the capital of green-building materials. As an energy-saving, environmentally friendly enterprise, we centralize R&D, advanced manufacturing, global sales, and ongoing technical support.

Operating with energy conservation and carbon footprint reduction as core concepts, Kingflex provides holistic insulation system solutions. From initial project design consultation, custom material development, high-throughput manufacturing, to field installation guidance and post-sale performance audits, we lead the development of the global building materials industry.

Established by the Jinwei Group, which boasts over 40 years of industrial heritage, Kingflex benefits from a deep foundation of thermal research. Jinwei Group, established in 1979, was the pioneer manufacturer of thermal insulation materials north of the Yangtze River. Today, we sustain that legacy by incorporating advanced automation and high-precision testing into every production line.

Kingflex Manufacturing Facility and Corporate Office

Scientific R&D & Engineering Expertise

At Kingflex, our team members are experts in polymers, thermodynamics, and mechanical design. We foster a tight-knit, talented workforce dedicated to providing first-class service to clients across sixty-six nations. Our current human capital assets include:

  • 8 professional R&D engineers focused exclusively on custom formulations, thermal modeling, and acoustic attenuation research.
  • 6 international business consultants handling supply chain logistics, localized certification compliance, and project tendering.
  • 230 skilled production workers operating our automated fabrication and vulcanization assembly lines.

Our commitment to continuous improvement means we invest heavily in laboratory equipment, fire chamber testing, and mechanical stress test rigs. This R&D system ensures that every batch of NBR/PVC foam delivered meets strict field application specifications.

Kingflex R&D Laboratory Team

Industrial Capacity & Global Reach

Massive output, automated accuracy, and structural supply security for large-scale engineering pipelines.

At present, Kingflex operates 5 large-scale fully automatic continuous extrusion assembly lines. With an annual production capacity exceeding 600,000 cubic meters, we have achieved status as a designated production enterprise authorized by the Ministry of Energy, the Ministry of Electric Power, and the Ministry of Chemical Industry in China.

Our materials are engineered for construction, petroleum refining, petrochemical processing, defense infrastructure, and aerospace applications. In the past 16 years, Kingflex thermal insulation products have been exported to more than sixty-six countries, ensuring building stability, process pipe safety, and energy conservation worldwide.

Automated Kingflex Production Line
5
Automatic Lines
600K+
Annual Capacity (m³)
66+
Export Destinations
40+
Years Industry Legacy

Standard Dimensions & Technical Parameters

Detailed mechanical properties, dimensions, and materials data for our NBR/PVC elastomeric range.

Property / Parameter NBR/PVC Elastomeric Sheet Roll NBR/PVC Elastomeric Pipe/Tube
Base Material Matrix Nitrile Butadiene Rubber / Polyvinyl Chloride Blend Nitrile Butadiene Rubber / Polyvinyl Chloride Blend
Available Thicknesses 6mm, 9mm, 13mm, 15mm, 19mm, 25mm, 32mm, 40mm, 50mm 6mm, 9mm, 13mm, 19mm, 25mm, 32mm, 40mm
Inner Diameter (ID) Range N/A (Flat sheet / custom roll) 6mm up to 114mm (Standard piping match)
Material Density 40 - 55 kg/m³ (Optimized for cell structural integrity) 40 - 55 kg/m³
Service Temperature Limit -40°C to +105°C (Extreme low-temp configuration available) -40°C to +105°C
Thermal Conductivity (λ) ≤ 0.034 W/m·K at 0°C (Highly stable thermal performance) ≤ 0.034 W/m·K at 0°C
Moisture Resistance Factor μ ≥ 10,000 (Excellent resistance to vapor permeation) μ ≥ 10,000
Fire Safety Compliance BS 476 Part 7 Class 1 & Part 6 Class 0, UL94 V-0 BS 476 Class 0, UL94 V-0, ASTM E84 compliant

China Factory Supply Chain Advantages

Why global procurement agencies trust Kingflex for reliable raw material sourcing, logistics, and cost control.

Geographic Cluster & Material Sourcing

Located in the Dacheng green-building materials cluster, we enjoy integrated access to high-grade polymers, blowing agents, and chemical additives. This minimizes raw material transport costs and secures our raw material supply chains during high-demand cycles.

Bespoke Customization (OEM/ODM)

We supply more than off-the-shelf items. We configure custom NBR/PVC ratios, color codings, self-adhesive backings, and reinforced foil jacketing. Our engineers adjust insulation density and formulation to match specific application specs.

Efficient Logistics & Direct Shipping

With direct routes to major deepwater ports in Tianjin and Qingdao, we streamline maritime freight logistics. Our export department handles custom declarations, export clearances, and combined container shipments to minimize transit delays.

Kingflex Quality Certificate ISO Kingflex Environmental Testing Kingflex Fire Rating Certificate Kingflex Safety and Quality Standard

Compliance & Global Standards Verification

In high-stakes industrial procurement, certifications are the foundation of trust. Kingflex products undergo verification testing by third-party laboratories. Our elastomeric solutions comply with the following global standards:

  • BS 476 (Parts 6 & 7): Attains Class 0 rating for fire propagation and Class 1 surface spread of flame.
  • REACH & RoHS: Completely free of heavy metals, polybrominated biphenyls, and harmful plasticizers.
  • UL 94: Evaluated to meet strict V-0 flammability classifications on synthetic foam structures.
  • CE Mark: Fully conforms to European Union health, safety, and environmental protection directives.
  • ASTM Standards: Thermally tested under ASTM C534 criteria for preformed flexible elastomeric cellular thermal insulation.

Every shipment is traceably tracked. Through our integrated batch numbers, we provide material traceability and transparent testing logs to help clients navigate strict local inspection protocols.

Localized Application Scenarios

From deep cryogenic processes to high-humidity commercial HVAC systems, Kingflex provides application-specific insulation solutions.

1. Commercial HVAC & Ductwork

Condensation control is the primary challenge in chilled water piping and commercial air distribution ducts. Kingflex sheets protect duct systems from moisture accumulation, preventing mold development and structural ceiling water damage.

2. Process Piping & Petrochemical Plants

In industrial environments, process temperature fluctuations demand high thermal stability. Our elastomeric insulation tubes insulate process pipes, preventing surface corrosion, reducing ambient heat exchange, and protecting operators from burns.

3. Cryogenic Systems & Low Temperature

For liquefied natural gas (LNG) distribution and ultra-low temperature scientific processes, Kingflex supplies specialized multi-layered cryogenic elastomeric systems. These systems maintain material flexibility at temperatures down to -196°C, preventing stress cracking.

4. Hospitality, Hospitals & Cleanrooms

Acoustic comfort is critical in hotels and medical centers. Kingflex open-cell and high-density sheets absorb structure-borne and airborne noises generated by mechanical blowers, chillers, and wastewater transport lines.

Verified Client Feedback & Quality Assurance

Transparent communications and technical problem-solving with our global engineering partners.

Client communication verification
Client order feedback
Engineering project agreement
Delivery specification verification
Logistics update confirmation

Frequently Asked Questions (FAQ)

Technical answers regarding product capabilities, material specifications, and logistics procedures.

Q1: What is elastomeric rubber foam insulation used for?
A1: It is mainly used for HVAC ducts, air conditioning pipes, building thermal insulation, industrial pipeline cold insulation, and acoustic sound insulation. Its closed-cell structure prevents condensation on chilled water pipes and maintains process temperatures.
Q2: Is Kingflex rubber foam insulation fire resistant?
A2: Yes, our rubber foam insulation products are flame retardant. They conform to BS 476 Class 0 and UL94 V-0 safety criteria, demonstrating self-extinguishing behavior and low smoke development indexes.
Q3: What is the difference between rubber foam and rock wool insulation?
A3: Rubber foam is a flexible, closed-cell material that is inherently moisture-resistant, making it ideal for HVAC, refrigeration, and acoustic insulation. Rock wool is a fibrous mineral-based material designed for high-temperature resistance, making it suitable for industrial steam boilers and fire walls but requiring a vapor barrier in cold systems.
Q4: Do you provide customized insulation products?
A4: Yes, we provide full OEM/ODM services. We customize thickness (from 6mm up to 50mm), pipe inner diameters (6mm to 114mm), custom density profiles, color coding, self-adhesive backings, and specialty aluminum protective foils.
Q5: What certifications do your products have?
A5: Our products have passed BS 476, CE, REACH, ROHS, UL94, ASTM, and other international certifications, ensuring product quality and compliance with global standards.
Q6: Does Kingflex products have traceability?
A6: Yes, Kingflex products have traceability. Every production batch is logged with a unique serial number, allowing us to trace raw materials, production times, quality control checks, and shipping logs.
Q7: What thickness of Rubber foam insulation sheet roll can you produce?
A7: We can produce from 6mm to 50mm thickness. Our 5 automated continuous production lines allow us to maintain thickness tolerances across all custom rolls.
Q8: What is the service life of rubber plastic pipe and board?
A8: Under standard operational conditions, the typical service life ranges from 10 to 15 years. This duration can vary based on exposure to direct UV radiation, physical stress, and operational temperature extremes.

Supplying Quality to Global Markets

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