Details
Aluminized Stitched Fiberglass Needle Mat is a high-temperature, flexible insulation material engineered for demanding industrial applications. It consists of a needled fiberglass mat substrate that is continuously stitched with high-strength thread (typically polyester or high-silica glass fiber) for structural integrity, and then aluminized on one or both surfaces with a high-purity aluminum foil layer (typically 99.5% pure).
It is a composite insulation blanket that features a three-layer construction where the fiberglass core provides excellent insulation and fire resistance, while the aluminum foil surfaces reflect radiant heat. The stitching prevents delamination and improves handling strength. This composite design creates a material with superior thermal performance, lightweight durability, and easy installation.
Core Layer: Glass fiber needle mat (non-woven structure formed by randomly oriented glass fibers interlocked through needle punching)
Surface Layer(s): Aluminum foil laminated to one or both sides, Self-adhesive backing is available, easy to paste and install.
Reinforcement: Stitched with high-strength thread (typically polyester or high-silica glass fiber) to secure layers and enhance structural integrity
Manufacturing Process:
Glass fibers (E-type or high-silica) are chopped and needle-punched into a dense mat
The needle mat assembly is stitched with specialized machinery using heat-resistant thread
Aluminum foil (0.007-0.02mm thickness) is laminated to the mat surfaces using high-temperature adhesive
Finished rolls are cut to specified widths and lengths
What are the key features of aluminized stitched fiberglass needle mat?
Triple-Layer Composite Structure: a composite insulation blanket that combines the thermal resistance of refractory fiberglass, the mechanical strength of a stitched matrix, and the radiant heat reflectivity, moisture resistance, and surface durability of an aluminum barrier.
High-Temperature Reflectivity: The aluminum surface reflects up to 90% of radiant heat, significantly improving insulation efficiency.
Low Thermal Conductivity: The fiberglass mat provides excellent resistance to conductive and convective heat transfer. Typical k-values range from 0.25 to 0.55 W/m·K across its temperature range.
Excellent Flexibility & Conformability: Despite its strength, it remains flexible enough to wrap complex shapes like pipes, valves, ducts, and vessels.
Durable & Non-Corrosive Surface: The aluminum layer acts as a barrier against moisture, oil, mild chemical vapors, and physical abrasion. It also resists UV degradation if used outdoors.
Lightweight & Easy to Install: Can be cut with utility knives or scissors and secured with high-temperature wires, bands, or adhesives.
Vermin & Mold Resistant: Inorganic materials do not support growth of mold, mildew, or attract pests.
Technical Parameters
Parameter | Value |
Density | 80-220 kg/m³ |
Thickness of Entire Mat | 3-25 mm (standard: 5, 8, 10, 15 mm) |
Thickness of Aluminum Foil | 7-150 μm |
Width | 1000-2000 mm (max. 3200 mm) |
Length | 10-50 m (roll form) |
Water Absorption | <0.5% |
pH Value | 6.5-7.5 (neutral) |
Thermal Conductivity | 0.035-0.038 W/m·K (at 70°C) |
Continuous Service Temperature | 650°C (E-glass), 800°C (high-silica) |
Short-term Exposure Temperature | 700°C (E-glass), 1000°C (high-silica) |
Heat Shrinkage | <3% at 450°C for 24h |
Radiant Heat Reflectivity | >90% |
Specific Heat Capacity | 0.84 kJ/kg·K |
Tensile Strength | 800-1200 N/50mm (machine direction) |
Elongation at Break | 3-5% |
Stitch Strength | >500 N (per line) |
Compression Resistance | >0.2 MPa (at 10% deformation) |
Flexural Strength | >1.5 MPa |
Sound Absorption Coefficient | 0.7-0.9 (at 1000-4000 Hz) |
Noise Reduction Rating (NRR) | 15-20 dB |
Chemical Resistance | Resists most oils, solvents, and alkalis. Acids can attack aluminum layer. |
Note: The mat can be customized based on thickness of the mat, thickness of aluminum foil, width of the mat, stitching thread, stitching pattern. Self-adhesive backing is available. Please contact us for your specific requirements.
What are the advantages and benefits of aluminized stitched fiberglass needle mat compared to other material?
Vs. Unfaced Fiberglass Needle Mats:
oSuperior Surface: No fiber erosion; acts as a vapor/moisture barrier.
oHigher Efficiency: Reflective surface reduces radiant heat gain/loss.
oCleaner & Safer: Fully encapsulates fibers, reducing airborne irritation.
oEasier to Clean/Wipe Down.
Vs. Rigid Insulation (Calcium Silicate, Mineral Wool Board):
oFlexible: Conforms to irregular surfaces, no cutting/joint sealing for complex geometries.
oLightweight: Easier to handle and install, less structural support needed.
oResists Impact Damage: Won't crack or shatter.
oBetter for Moving Parts: Expansion joints, removable covers.
Vs. Laminated Foil Films (Non-Stitched):
oFar More Durable: Stitching prevents delamination under thermal cycling and vibration.
oHigher Temperature Capability.
What applications is aluminized stitched fiberglass needled mat used for?
Industrial Applications
Furnace & Kiln Insulation: Walls, doors, and linings
Pipe Insulation: Hot and cold process piping in chemical plants
Exhaust Systems: Automotive, industrial, and marine exhaust components
Boiler Insulation: Reduces heat loss and improves efficiency
Metal Treatment: Heat shields for annealing and tempering processes
Building & Construction
Roof Insulation: Reduces summer heat gain and winter heat loss
Wall Insulation: For both interior and exterior applications
Floor Insulation: Under radiant heating systems
Fireproofing: As a fire-resistant barrier between building components
Soundproofing: In walls, ceilings, and floors to reduce noise transmission
Transportation
Automotive: Engine compartment insulation, exhaust heat shields, firewall protection
Aerospace: Aircraft engine nacelles, thermal protection for components
Marine: Engine rooms, exhaust systems, and bulkheads
Appliances & Domestic Use
Ovens & Cooktops: Door seals and internal insulation
Water Heaters: Tank and pipe insulation
Fireplaces: Surround insulation and hearth protection
HVAC Systems: Ductwork insulation for energy efficiency
Specialized Applications
Electrical Equipment: Insulation for transformers and switchgear
Medical Devices: MRI room insulation (non-magnetic)
Agriculture: Greenhouse insulation and cold storage
Military & Defense: Thermal protection for vehicles and equipment
How to store and handle aluminized stitched fiberglass needled mat?
Storage: Store in a clean, dry, indoor environment. Keep rolls upright on end. Protect from weather, moisture, and physical damage. Do not store heavy objects on top.
Handling: Wear appropriate PPE (gloves, safety glasses, long sleeves, N95 mask) during handling and cutting to prevent minor fiber irritation.
Installation:
1.Surface Prep: Ensure substrate is clean, dry, and free of sharp edges.
2.Cutting: Use sharp blade or heavy-duty scissors. Cut with aluminum side up for cleaner edge.
3.Fitting: Wrap snugly but without excessive compression. For multiple layers, stagger joints.
4.Sealing & Securing: Use high-temperature aluminum foil tape (for seams) and stainless steel bands or wires (for circumferential securing). For high-vibration areas, use locking stitches or lacing.
5.Joints: But joints tightly and tape. For outdoor use, ensure tape laps are weather-facing.
FAQ
Q1: Can aluminized stitched fiberglass needle mat be used outdoors?
A: Yes, the aluminum facing provides excellent weather resistance. However, for permanent outdoor exposure, specify a UV-stabilized or PVF laminated foil variant, as pure aluminum will eventually oxidize and degrade under constant UV/weathering.
Q2: Is the aluminum facing electrically conductive?
A: Yes, it is a conductor. It must be properly grounded if used near electrical equipment or where static discharge could be a hazard. Consult electrical safety codes.
Q3: Can aluminized stitched fiberglass needle mat be used on chlorine or acid service?
A: No. Moist chlorine gas, hydrochloric acid, and other halogens will aggressively corrode the aluminum layer. Use a chloride-free, polymer-coated (e.g., Tedlar, silicone) facing or stainless steel foil for such environments.
Q4: How do I clean aluminized stitched fiberglass needle mat?
A: Wipe with a damp cloth or mild detergent. Do not use abrasive cleaners or high-pressure water, which can damage the foil.
Q5: What is the lifespan of aluminized stitched fiberglass needle mat?
A: With proper installation and in a suitable environment, it can last 10-20 years. Lifespan is reduced by physical abuse, chemical exposure, or continuous temperatures at the upper limit of its rating.
Q6: Is aluminized stitched fiberglass needle mat fireproof?
A: The fiberglass and inorganic stitching are non-combustible. The aluminum foil will melt at ~660°C (1220°F), but the underlying mat will continue to provide insulation. It meets stringent fire safety standards for industrial use.
Q7: What is the difference between "needled" and "woven" fiberglass?
A: Needling is a mechanical process that entangles loose fibers into a mat, creating a uniform density without binders. It is more flexible and has lower thermal conductivity than a rigid woven fabric.
Q8: Can aluminized stitched fiberglass needle mat be recycled?
A: Yes. Both the fiberglass and aluminum components can be recycled separately. Contact local recycling facilities for specific guidelines.
