Kingflex
Kingflex
Attics are among the most structurally demanding zones for HVAC duct integration. Unlike conditioned living areas, unconditioned attics suffer extreme seasonal temperature swings. During peak summer conditions, roof deck radiant heat transfer can drive attic temperatures upwards of 65°C (150°F). Conversely, winter environments expose ducts to freezing drafts. When cold air is transported through uninsulated or poorly insulated ducts traversing a hot, humid attic space, the physical phenomenon of moisture condensation (sweeping) occurs instantly.
Traditional fibrous products like rock wool and fiberglass offer high-temperature capabilities but lack inherent moisture barriers. Once moisture penetrates their fibrous mesh, their thermal performance deteriorates rapidly. In contrast, Kingflex Closed-Cell NBR/PVC Elastomeric Foam provides an integrated dual-defense mechanism: high thermal resistance coupled with a built-in water vapor barrier ($ \mu \geq 7000 $), rendering external vapor jackets obsolete.
Kingflex Insulation Co., Ltd. is a leading industrial manufacturer and trading conglomerate specializing in high-performance thermal insulation products. Headquartered in Dacheng, China—historically recognized as the global capital of eco-friendly building materials—our production operations combine state-of-the-art continuous foaming and vulcanization lines with raw-material synthesis networks.
Established under the parent entity Jinwei Group, which possesses over 40 years of manufacturing lineage dating back to 1979 (the pioneer of northern China insulation production), Kingflex has engineered highly optimized processes for consistent quality output.
Kingflex elastomeric closed-cell foam is engineered using a precise compound of synthetic Nitrile Butadiene Rubber (NBR) and Polyvinyl Chloride (PVC). Through advanced horizontal and vertical expansion technologies, a dense cell matrix is formed. This matrix resists mechanical degradation, thermal flow, and moisture absorption.
| Property | Specification Details |
|---|---|
| Base Compounds | Synthetic NBR (Nitrile Butadiene Rubber) / PVC Polymer Alloy |
| Sheet Thickness Range | 6 mm to 50 mm (Custom gauges supported) |
| Foam Density Range | 40 to 55 kg/m³ (Uniform micro-cellular configuration) |
| Operating Limits | -40°C to 105°C (Ensuring safe performance over duct surfaces) |
| Thermal Conductivity ($ \lambda $) | $ \leq 0.034 $ W/(m·K) at 0°C (High efficiency containment) |
| Moisture Resistance Factor | $ \mu \geq 7,000 $ (Eliminating condensation failures) |
| Dimension Parameters | Performance Metrics |
|---|---|
| Pipe Inside Diameter (ID) | 6 mm to 114 mm (Designed to wrap major copper & steel lines) |
| Wall Thickness Range | 9 mm to 40 mm |
| Cell Structure | Closed-cell foam rate exceeding 98% |
| Compression Recovery | Over 80% (Resilience under localized stresses in attics) |
| Fire Compliance Standards | Class 1 / Class V-0 ratings (Self-extinguishes upon flame removal) |
Professional Factory Engineering Team
R&D Extrusion Control System
Microcellular Expansion Testing
In highly humid regions, attics become high-dewpoint environments. Our high-density, closed-cell NBR sheet roll prevents moisture penetration. This maintains a dry surface and prevents duct-sweating that can rot attic beams and ceilings.
Modern ventilation units are designed for minimal space, demanding thin, high-efficiency insulation. Using thin elastomeric sheets (e.g., 10mm to 19mm) maintains space efficiency while keeping ducts insulated at critical joints.
Velocity noise from air flowing through metal duct runs can resonate through quiet bedrooms. Open-cell nitrile liners and high-density elastomeric exterior layers damp structural vibrations and absorb mid-frequency sound waves.
During the manufacturing phase, our NBR/PVC polymer compound is subjected to high-pressure chemical blowing agents. The gas bubble distribution is systematically regulated by thermal controllers. This ensures the resulting foam contains over 98% closed cells. The heat-conducting paths through the polymer are minimized, resulting in a low thermal conductivity value ($ \lambda = 0.034 $ W/(m·K)). This performance holds up over years of service because it does not rely on transient gas fills within the cells.
Additionally, the integration of PVC polymer increases structural tear strength and resistance to UV and ozone degradation. This makes the insulation suitable for long-term attic installations where air shifts and wind wash are present.
Kingflex Standard Dimension:
Material: NBR/PVC
Thickness: 6mm-50mm
Density: 40-55kg/m³
Service Temperature Range: -40℃ to 105℃
Advantage:
1. Foams evenly and fully, closed cell rate over 98%, excellent thermal insulation.
2. Full closed-cell structure, low moisture absorption, stable long-term thermal conductivity.
3. Compression resilience over 80%.
4. Flame retardant, self-extinguishing off fire.
5. Low thermal conductivity, high moisture resistance factor.
Application:
1. Central air conditioning: Heat insulation for air ducts and pipes.
2. Buildings: Wall, roof and basement thermal & sound insulation.
3. HVAC & water supply: Anti-condensation and anti-freezing for pipes.
4. Industrial plants: Insulation for equipment, steam pipes and storage tanks.
5. Hotels, malls & hospitals: Insulation and noise reduction for ventilation ducts and machine rooms.
6. Rail transit & cold storage: Thermal insulation for carriages and cold rooms.
7. Chemical industry: Heat insulation, sound insulation and corrosion protection for process pipe.
Kingflex Standard Dimension:
Material: NBR/PVC
Thickness: 9mm-40mm
ID: 6mm-114mm
Density: 40-55kg/m³
Service Temperature Range: -40℃ to 105℃
Advantage:
1. Foams evenly and fully, closed-cell rate over 98%, excellent thermal insulation.
2. Professional pipe spraying equipment ensures even coating.
3. Compression resilience over 80%.
4. Flame retardant, self-extinguishing off fire.
5. Low thermal conductivity, high moisture resistance factor.
6. Greatly reduce pipe freezing and cracking risks.
Application:
1. Central air conditioning chilled/hot water pipes and condensate pipes.
2. Building HVAC & water supply pipes: antifreeze and anti-condensation.
3. Ventilation and equipment room pipes for hotels, malls and hospitals.
4. Thermal & cold insulation for industrial steam and process pipes.
5. Cold insulation for cold storage and cold chain pipelines.
6. Insulation, sound and corrosion protection for chemical & petrochemical pipes.
7. Thermal insulation for solar and hot water system pipelines.
For building insulation materials, fire safety and ecological compatibility are non-negotiable criteria. Kingflex products undergo testing and analysis to verify adherence to local standards in major international construction zones. By meeting strict flame-spread index limits, our insulation solutions help reduce project approval delays for engineers.
This level of certification supports distribution partners in European, American, and Middle Eastern markets, facilitating importing processes and site inspections.
Our client engagement model is designed to support the entire project life cycle. From preliminary material specification design to logistics coordination, our international sales team provides professional support. This direct communication helps eliminate misunderstandings about dimensions, lead times, and customs documentation.
