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IR Transmitting PMMA Film

Available Configurations

Properties common to all products in this list

Commodity: Polymers Material: Polymethyl methacrylate (PMMA) Form: Foil/Film/Sheet Composition: PMMA, Acrylic Grade: IR Transmitting CAS Number: 9011-14-7 Color: Dark Red / Black
IR Transmitting PMMA Film enables precise mid-infrared light transmission, supporting applications such as gas spectroscopy, thermal imaging optics, and integrated IR sensors. In research and laboratory instrumentation, it serves as an effective optical window or waveguide material due to its stable transmission between 3–5 µm and 8–12 µm. Its mechanical flexibility and ease of microstructuring allow seamless incorporation into sensor housings, flow cells, and MEMS platforms. The film’s low absorption and consistent refractive index improve signal quality in infrared reflectance or absorption measurements. Suitable for environmental monitoring, biomedical diagnostics, and photonic R&D, it provides a scalable substrate for prototyping compact IR devices and optical assemblies.
Starting at $267.00 each
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Material Properties

Physical Properties
Element Value
Abbe number 57.2
Flammability HB
Radiation resistance Fair
Refractive index 1.49
Resistance to Ultra-violet Good
Limiting oxygen index( % ) 17-20
Water absorption - over 24 hours( % ) 0.2
Density( gcm⁻³ ) 1.19
Chemical Resistance
Element Value
Acids - concentrated Good-Poor
Acids - dilute Good-Poor
Alcohols Good-Poor
Alkalis Good
Aromatic hydrocarbons Poor
Greases and Oils Good
Halogenated Hydrocarbons Poor
Halogens Poor
Ketones Poor
Electrical Properties
Element Value
Dielectric constant @1MHz 2.6
Dissipation factor @ 1MHz 0.014
Dielectric strength( kV mm⁻¹ ) 15
Surface resistivity( Ohm/sq ) 10¹⁴
Volume resistivity( Ohmcm ) 2-14 x 10¹⁵
Mechanical Properties
Element Value
Hardness - Rockwell M92-100
Poisson's ratio 0.35-0.4
Elongation at break( % ) 2.5-4
Tensile modulus( GPa ) 2.4-3.3
Izod impact strength( J m⁻¹ ) 16-32
Tensile strength( MPa ) 80
Thermal Properties
Element Value
Heat-deflection temperature - 0.45MPa( C ) 105
Heat-deflection temperature - 1.8MPa( C ) 95
Lower working temperature( C ) -40
Upper working temperature( C ) 50-90
Specific heat( J K⁻¹ kg⁻¹ ) 1400-1500
Thermal conductivity( W m⁻¹ K⁻¹ ) 0.17-0.19@23°C
Coefficient of thermal expansion( x10⁻⁶ K⁻¹ ) 70-77
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Available Configurations

Properties common to all products in this list

Commodity: Polymers Material: Polymethyl methacrylate (PMMA) Form: Foil Composition: PMMA, Acrylic Grade: IR Transmitting CAS Number: 9011-14-7 Color: Dark Red / Black

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Tolerances

Foil
Thickness ±20%
Linear dimension <100mm ±1mm
Linear dimension >=100mm +2 / -1%