China Open Cell Foam Sound Absorption Manufacturers & Supplier

High-Performance Acoustic Insulation Solutions for Global Industrial & HVAC Applications

Premium Acoustic Insulation Products

Engineered elastomeric foam materials specifically optimized for high-frequency noise attenuation and thermal management.

Soundproof
China Flexible rubber foam sound insulation with 6mm
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Insulation Roll
China Rubber foam insulation roll sheet
China Rubber foam insulation roll sheet Manufacturer, Supplier
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Open Cell
China Flexible open cell rubber foam sound absorbing
China Flexible open cell rubber foam sound absorbing insulation Manufacturer, Suppliers
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Fire Retardant
Wholesale KingFlex Fire Retardant Nitrile Foam Tube
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Cryogenic
Wholesale Dienes elastomeric Insulation Cryogenic
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ULT Systems
Wholesale Cryogenic Rubber Foam Insulation
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Low Conductivity
Wholesale Kingflex rubber foam pipe
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Cryogenic System
China Flexible Cryogenic Insulation
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Acoustic Physics & Material Mechanics of Open Cell Foam Sound Absorption

Exploring the technical differences, sound damping structures, and NRC parameters of elastomeric acoustics.

In the field of high-performance architectural acoustics and industrial noise suppression, the choice of cellular geometry in elastomeric materials represents the difference between basic thermal barriers and specialized acoustic energy dissipation systems. While closed-cell configurations excel in blocking moisture transmission and preventing thermal bridging, they fall short in dampening sound energy due to the reflecting membranes of isolated gas cavities. In contrast, open-cell elastomeric rubber foam sound absorption relies on a complex, interconnected matrix of cell walls that force acoustic waves into viscous shear cycles.

Key Technical Insight (Noise Reduction Coefficient - NRC): When an acoustic wavefront strikes an open-cell matrix, the air molecules within the interconnected voids oscillate, transforming acoustic kinetic energy into thermal energy through friction against the cell boundaries. Our standard 25mm to 50mm open-cell rubber foam board configurations deliver an NRC of up to 0.85, making them highly effective for the mechanical equipment rooms and HVAC systems of high-occupancy structures.

Viscoelastic Damping Mechanics

The matrix compound of NBR/PVC delivers viscoelastic damping. When sound waves pass through the material, the flexible elastomeric matrix vibrates and absorbs low-frequency structure-borne noise, reducing mechanical resonance.

Optimal Flow Resistivity

Achieving optimal sound absorption requires matching acoustic flow resistance with air density. Kingflex adjusts cell density (40-55 kg/m³) to prevent sound reflection, allowing sound waves to enter the material and dissipate.

Kingflex Insulation Co., Ltd.

Kingflex Insulation Co., Ltd. is a professional manufacturing and trading combo for thermal insulation products. Kingflex's research development and production department is located in the well-known capital of green building materials in Dacheng, China. It is an energy-saving, environmentally friendly enterprise concentrating on research, development, production, and sales.

In operation, Kingflex takes energy saving and consumption reduction as its core concept. We provide insulation solutions via consulting, R&D production, installation guidance, and post-sale service to lead the development of the global building materials industry.

Historical Authority: Established by the Jinwei Group, which has more than 40 years of history. Kingway Group was established in 1979 and was the first manufacturer of thermal insulation materials north of the Yangtze River.
Kingflex factory workshop and headquarters
5
Automatic Assembly Lines
600K+
m³ Annual Production Capacity
40+
Years Industry Experience
66+
Exporting Countries
Kingflex advanced production lines

Advanced Production & R&D Excellence

Kingflex has become a designated production enterprise selected by the Ministry of Energy, the Ministry of Electric Power, and the Ministry of Chemical Industry. Our team is a tight-knit, talented group with a shared vision of delivering first-class service to our clients.

Kingflex employs eight professional engineers in our R&D Department, 6 international sales experts, and 230 workers in the production department. Our testing facilities analyze thermal conductivity, fire performance, and noise reduction coefficients, keeping our products at the forefront of the industry.

Standard Technical Dimensions & Specifications

Comprehensive physical dimensions and performance ratings for NBR/PVC elastomeric foam products.

Black Rubber Foam Insulation Sheet Roll

Material Formulation NBR/PVC blend
Available Thickness 6mm to 50mm
Density Range 40 - 55 kg/m³
Service Temperature Range -40℃ to 105℃
Closed-Cell / Open-Cell Options Closed cell (thermal) >98% / Selected Open Cell (acoustic)

Black Rubber Foam Insulation Pipe

Material Formulation NBR/PVC blend
Available Thickness 9mm to 40mm
Inner Diameter (ID) 6mm to 114mm
Density Range 40 - 55 kg/m³
Features Uniform coating, flame retardant, self-extinguishing

Key Product Advantages:

  • Foams evenly and fully, with high structural density.
  • Low thermal conductivity and high moisture resistance factor.
  • Compression resilience over 80% under standard load test.
  • Flame retardant, self-extinguishing off fire to ensure building safety.
  • Reduces pipeline freezing, cracking, and surface condensation risks.

Global Procurement & System-Level Solutions

Addressing procurement challenges for industrial, commercial, and extreme low-temperature projects.

HVAC & Air Duct Systems

Large-scale buildings require integrated soundproofing and thermal control. Our high-density acoustic rubber foam insulation boards prevent noise transmission in HVAC air handling ducts while preventing condensation and thermal loss.

Cryogenic & ULT Applications

For liquid natural gas (LNG) processes and ultra-low temperature (ULT) refrigeration, Kingflex provides flexible cryogenic elastomeric systems that remain elastic down to cryogenic limits, preventing cracking and thermal intrusion.

Industrial Noise Mitigation

Industrial steam pipes and chemical tanks generate broad-spectrum noise. Applying our open-cell acoustic wraps dampens high-frequency mechanical vibration and minimizes acoustic radiation across chemical and power plants.

R&D and Testing Center Gallery

We test cell consistency, thermal conductivity, and fire safety in-house to ensure high product quality.

R&D equipment
R&D laboratory testing
Quality check process

Certifications & Localized Supply Chain Support

Meeting building codes and international standards for fire safety, environmental health, and quality tracking.

Exporting to over 66 countries requires adherence to localized building regulations and safety standards. Kingflex products have passed rigorous testing protocols to ensure global compatibility.

Traceability and Quality Assurance: Every production batch of Kingflex elastomeric insulation is fully traceable. From raw elastomer compound mixing to final heat extrusion, each step is logged to ensure quality control.

Key Certification Achievements:

  • BS 476 Part 6 & 7: Class 0 and Class 1 fire rating compliance for building applications.
  • REACH & RoHS: Free from heavy metals, PBDEs, and PBBs, making it suitable for green building projects.
  • UL 94 & ASTM: Meets global fire retardancy and physical performance requirements.
  • CE Mark: Fully certified for European architectural and mechanical installations.
ISO quality certificate FM approved certificate Acoustic absorption certificate CE certification document

Technological Roadmap & Future Horizons

How Kingflex is advancing the acoustic and thermal properties of rubber foam insulation.

Phase 1: Nano-Composite Foam Structures (Current Implementation)

By integrating nano-scale carbon structures into the NBR/PVC polymer blend, we increase the mechanical strength of the cell walls. This enhances sound attenuation in the 500Hz-2000Hz range without increasing density.

Phase 2: Bio-Based Elastomeric Formulations (Target 2025-2026)

In response to global demand for low-VOC building materials, we are developing a bio-based elastomer line that reduces dependency on fossil-fuel hydrocarbons while maintaining BS 476 Class 0 fire ratings.

Phase 3: Smart Acoustic Diagnostic Coatings (Target 2027)

We are researching external surface treatments that indicate local moisture intrusion or pipeline corrosion under insulation (CUI) through non-destructive visual checks, simplifying plant maintenance.

Global Projects & On-site Applications

HVAC installation case Industrial pipeline wrapping Air conditioner pipe insulation Commercial complex machine room insulation

Frequently Asked Questions (FAQ)

Technical explanations and product guidance for developers, acoustic engineers, and purchasing teams.

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 sound insulation. Its flexible structure makes it easy to install on complex geometries while providing stable acoustic and thermal performance.
Q2: Is Kingflex rubber foam insulation fire resistant?
A2: Yes, our rubber foam insulation products are fire retardant, meeting international safety standards such as BS 476 (Class 0 and Class 1), CE, and UL94. This makes them suitable for use in high-occupancy commercial projects and industrial environments.
Q3: What is the difference between rubber foam and rock wool insulation?
A3: Rubber foam is flexible, closed-cell, and moisture-proof, which prevents water vapor transmission without a separate vapor barrier—ideal for HVAC and cryogenic systems. Rock wool is a fibrous mineral material that is high-temperature resistant and fireproof, making it suitable for high-temperature industrial pipelines.
Q4: Do you provide customized insulation products?
A4: Yes, we support complete OEM services. We can adjust the thickness (6mm to 50mm), density, surface backing (such as self-adhesive or aluminum foil), and cut dimensions to meet specific industrial or architectural project needs.
Q5: What certifications do your products have?
A5: Our products have passed BS 476, CE, REACH, RoHS, UL94, ASTM, and other international certifications. This compliance ensures our materials meet regional building codes for environmental safety and quality control.
Q6: Do Kingflex products have traceability?
A6: Yes, all Kingflex products are fully traceable. We mark production batches and log raw materials, manufacturing dates, and quality control tests to ensure consistent performance.
Q7: What thickness of rubber foam insulation sheet rolls can you produce?
A7: We can produce sheets and rolls in thicknesses ranging from 6mm to 50mm, allowing you to select the appropriate level of thermal resistance and sound absorption for your application.
Q8: What is the expected service life of Kingflex rubber pipes and boards?
A8: Under standard operating conditions (-40℃ to 105℃) and with proper installation, the expected service life is 10 to 15 years. The material is resistant to mold growth and environmental degradation, helping to maintain its performance over time.

Verified Customer Satisfaction

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Discover Our Technical Range

Select from our certified thermal and acoustic insulation line for architectural and industrial projects.

Insulation Tube
Wholesale KINGFLEX brand rubber foam insulation tube
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Low Temp Tubing
Wholesale Low temperature thermal insulation tubing
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Closed Cell
China Closed Cell Rubber Foam Insulation Tube
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Cryogenic Flex
Wholesale Kingflex flexible insulation material
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Insulation Tube
Wholesale KINGFLEX INSULATION TUBE
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High Performance
Wholesale Kingflex insulation tube excellent performance
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NBR PVC Tube
Wholesale insulation tube pipe made by NBR PVC
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Acoustic Board
China High Density Acoustic Rubber Foam Board
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Production Operations & Facility Gallery

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Our Professional Global Service Team

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