Ventilation filter endowed with oil repellency
2016
The present invention provides a ventilation filter with which excellent ventilation characteristics can be maintained without clogging of pores even in an environment exposed to oil, oil mist or ink. The present invention relates to a ventilation filter that is provided with a porous membrane having a surface coated with an oil repellent agent and is characterized in that the falling angle of 20 µl of hexadecane or pentadecane on the filter surface is 60° or less.
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