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Recommendation for Infrared Transmitting resin

Recommendation for Infrared Transmitting resin

Recommendation for Infrared Transmitting resin

Gentleman hello,

I would like your help to define an Infrared Transmitting resin for a part i am designing, the part is a cover (see attached picture) for an IR transmitter, the cover snaps into a designated opening in some other part.

Manufacturing method: Injection molding.
Material properties: Infrared Transmitting resin for 850NM wave length, not very rigid for snap features to work well.
Color: Black.

Thanks for your help.

RE: Recommendation for Infrared Transmitting resin

If you are requesting help in a material choice then PMMA is about the best. It will need a black, IR transparent dye colourant added.
It's quite stiff with a low elongation before break so you will have to do the sums for your snap fit cantilevers.


It's ok to soar like an eagle, but weasels don't get sucked into jet engines.

RE: Recommendation for Infrared Transmitting resin

Any recommendation for material manufacturer? Sabic / Chimei / Bayer....? What series?

RE: Recommendation for Infrared Transmitting resin

Google should be helpful. Many makers of acrylic (PMMA). It's all much of a muchness - they all make the same basic grades - some do toughened, opal, etc. in an effort to differentiate products. Best to specify "Clear Acrylic" with whatever dye your moulder chooses. Some material makers may do a standard IR transparent black, but probably a tonne+ min order.


It's ok to soar like an eagle, but weasels don't get sucked into jet engines.

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