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Wholesale Kingflex Thermal Insulation Rubber Foam Sheet Supplier, Factories

Kingflex Thermal Insulation Rubber Foam Sheet is a kind of black flexible elastomeric nitrile rubber foam. It is original closed cell and fiber-free elastomeric foam.

Product Description

The expanded closed-cell structure makes it an efficient insulation. It is manufactured without the use of CFC's, HFC's or HCFC's. The Thermal Insulation Rubber Foam Sheet is also effective for reducing HVAC noise. On cold systems, insulation thicknesses have been calculated to control condensation on the insulation outer surface, as shown in the table of thickness recommendation.

Thermal Insulation Structure Diagram
Rubber Foam Sheet Roll
Insulation Application
Thermal Insulation Sheet Storage
Foam Sheet Production
Product Roll Close Up
Warehouse Storage
Pipes Insulation Process
Black Foam Sheet Close Up
Foam Sheet Measurements
Dimension Specifications
Thickness Width 1m Width 1.2m Width 1.5m
Inches mm Size (L*W) ㎡/Roll Size (L*W) ㎡/Roll Size (L*W) ㎡/Roll
1/4" 6 30 × 1 30 30 × 1.2 36 30 × 1.5 45
3/8" 10 20 × 1 20 20 × 1.2 24 20 × 1.5 30
1/2" 13 15 × 1 15 15 × 1.2 18 15 × 1.5 22.5
3/4" 19 10 × 1 10 10 × 1.2 12 10 × 1.5 15
1" 25 8 × 1 8 8 × 1.2 9.6 8 × 1.5 12
1 1/4" 32 6 × 1 6 6 × 1.2 7.2 6 × 1.5 9
1 1/2" 40 5 × 1 5 5 × 1.2 6 5 × 1.5 7.5
2" 50 4 × 1 4 4 × 1.2 4.8 4 × 1.5 6
Material Flexibility Test
Self Adhesive Backing Sheet
Technical Data
Property Unit Value Test Method
Temperature range °C (-50 - 110) GB/T 17794-1999
Density range Kg/m³ 45-65Kg/m³ ASTM D1667
Water vapor permeability Kg/(m.s.pa) ≤0.91×10 ﹣¹³ DIN 52 615 / BS 4370 Part 2 1973
μ - ≥10000 -
Thermal Conductivity W/(m.k) ≤0.030 (-20°C) ASTM C 518
≤0.032 (0°C)
≤0.036 (40°C)
Fire Rating - Class 0 & Class 1 BS 476 Part 6 & Part 7
Flame Spread and Smoke Developed Index - 25/50 ASTM E 84
Oxygen Index - ≥36 GB/T 2406, ISO 4589
Water Absorption, % by Volume % 20% ASTM C 209
Dimension Stability - ≤5 ASTM C534
Fungi resistance - Good ASTM G21
Ozone resistance Good GB/T 7762-1987
Resistance to U.V. and weather Good ASTM G23
Key Benefits
Indoor Air Quality-friendly

Fiber-free, formaldehyde-free, low VOCs, and non-particulate.

Quiet Operation

Highly effective in blocking noise and mitigating vibration damage.

Durable & Resilient

Long-lasting performance without a fragile vapor retarder.

The Manufacturing Process of Thermal Insulation Rubber Foam Sheet

The three main components used in the manufacturing of elastomeric closed cell foam insulation include:

  • Synthetic rubber blend: typically nitrile butadiene rubber (NBR) and/or ethylene-propylene-diene monomer (EPDM)
  • Polyvinyl chloride (PVC)
  • A chemical foaming agent

These components are combined in a large mixer, typically in batches of 500 pounds or more. The mixture is then put through extruding equipment to form a particular profile or shape, typically either a round tube or a flat sheet.

The profile is heated in an oven to a specific temperature, a process that causes the chemical foaming agent to change from a solid to a gas. When this occurs, thousands of tiny air pockets (cells)—all of which are connected—form. The profile is carefully cooled to ensure that these cells remain unbroken and intact, maintaining the material’s closed cell structure. It is then cut to size and packaged for shipment.

Elastomeric foams are made without the use of chlorofluorocarbons (CFCs), hydrochlorofluorocarbons (HCFCs), or hydrofluorocarbons (HFCs), making them suitable for the toughest environmental specifications.

Frequently Asked Questions (FAQ)
What are the main environmental benefits of this insulation sheet?
The insulation is manufactured entirely without the use of CFCs, HFCs, or HCFCs. Additionally, it is fiber-free, formaldehyde-free, contains low VOCs, and is non-particulate, making it friendly for indoor air quality.
Does the thermal insulation sheet help with sound attenuation?
Yes, it is highly effective at reducing HVAC noise and blocking vibration damage in mechanical and duct systems.
How does the closed-cell structure control condensation?
On cold systems, the insulation thickness is scientifically calculated to keep the outer surface temperature above the dew point, effectively preventing condensation without relying on a fragile vapor retarder.
What is the fire rating and flame performance of this material?
According to the technical data, it achieves a Class 0 and Class 1 fire rating under BS 476 Part 6 & Part 7 testing, and has a Flame Spread and Smoke Developed Index of 25/50 under ASTM E 84.
What components make up elastomeric closed-cell foam insulation?
It is primarily made from a synthetic rubber blend (NBR and/or EPDM), polyvinyl chloride (PVC), and a chemical foaming agent that expands during heating to form millions of tiny air pockets.
What environmental resistances does the sheet possess?
The material is tested to show excellent resistance to fungi (ASTM G21), ozone (GB/T 7762-1987), and UV rays/weathering (ASTM G23).

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