Filter Series

Asahi Kasei's DELPET™︎ Filter series is a methacrylic resin that selectively transmits near-infrared radiation using proprietary techniques. It is used as a cover for remote controls and sensors.

Filter Series

Transmitted by near-infrared rays
To the remote control or sensor

The DELPET™ ︎Filter series appears completely black at first glance, but its unique technology allows only near-infrared light to pass through. It has good weather resistance and can be used as a cover for remote controls and sensors. If you are considering using it, please contact us.

DELPET™ Filter series details

Filter series features

Allows only near-infrared light to pass through

Black, glossy appearance

Integral molding with surrounding material is possible

High weather resistance

Can freely design filters such as aspherical lenses

Filter series applications

Cover for infrared transmitters such as remote controls

Cover for motion sensors

Filter series physical properties table

* The property value is a representative value and not a guaranteed value.

Physical property items Test method Unit Grade name
FIL A72/FIL A82 FIL B72/FIL B82
1. Flow characteristics Melt flow-rate
(230°C､37.3N)		 1133 g/10min 8.0 2.0
Spiral length (wall thickness: 2mm, resin temperature: 250°C, mold temperature: 60°C, resin pressure: 75MPa) Asahi Kasei PMMA method cm 38 27
2. Mechanical Properties Tensile modulus 527-1/1A/1 MPa 3300 3300
Tensile breaking stress 527-1/1A/5 MPa 72 77
Tensile failure strain 527-1/1A/5 % 5 6
Bending elastic modulus 178 MPa 3300 3300
Bending strength 178 MPa 120 130
Charpy impact strength without notch 179/1eU kJ/m2 20 22
Charpy impact strength notched 179/1eA kJ/m2 1.3 1.4
3. Thermal Properties Deflection temperature under load（1.8MPa） 75-1,2 °C 91 100
Vicat softening temperature 306B50 °C 98 109
4. Other Properties Water absorption (23°C､24hr) 62method1 % 0.3 0.3
Density 1183 g/cm3 1.19 1.19
Refractive index 489 - - -
Total light transmittance 13468-1 % - -
Rockwell hardness M scale 2039-2 - 95 100
Mold shrinkage Asahi Kasei PMMA method % 0.2~0.6 0.2~0.6

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