3M P100 20xx Filter Cover / Protector
Description
3M P100 Bayonet type 20xx Filter Cover _________________________________ This filter cover provides 5 advantages: 1. Prevents you from accidentally touching the filter which might contain the filtered positive particles / droplets when being used in high exposure areas. 2. Protects the P100 filter when cleaning the respirator using isopropyl alcohol or any other sanitizer solution (which reduces the integrity and efficiency of filter by damaging the electrostatic property). Now just wipe the filter cover externally without opening the top cover. 3. Prolongs the usage of the P100 filter. 3M recommends 40 hours or 30-40 days (whichever comes earlier) for P100 2091 Bayonet filter. But scarcity / problems with availability of filter, this won't be practically possible. Using this filter cover we can prolong the usage of this filter up to 3 months or till the person experiences breathing difficulty. 4. This filter cover embeds 3M bayonet type male & female adapters within the base. So removing the filter for storage purposes and respirator sanitizing will be so much easier. This might sound trivial, but you'll realize once you start using P100 2091 filter. 5. This design fits for both half face and full-face 3M respirators. Checked compatibility with 6200, 6300, 7502 (half face ones) and 6800 (full face) respirators. You can observe the raised lip (45mm diameter) in 6200 models annotated in the picture, so designed the base to have groove / trough to accomodate this. __________________________________ Printing instructions: This filter cover is optimized for printing using both 0.4 and 0.8mm nozzle sizes. Pictures added above in the gallery are printed using 0.8mm Nozzle with 0.4mm layer height & 60mm/s and hence the coarse texture (not worried about appearance that much). I have added two files for Base - one with male adapter and another without. Base with male adapter requires support for printing and removing the supports was very difficult. So added separate male adapter and male base files, which can be printed separately and glued (i used industrial grade 2 Part epoxy glue, but even Fevibond will do the job) in place. IMO, gluing seems to be much easier than fiddling with supports. Once male adapter is glued in, it needs a washer for making it air-tight. I used Foam roll (commonly used to wrap electronic items and circuit boards). You can try other materials also. Top cover is just a friction fit. Snap fit or adding screws will add more complexity to the design. Anyways once the filter cover is closed, you'll be opening it again only to change the filters. Will recommend to print it in White color. Realized it after printing in black and sanding the rough edges. If the filter cover can be coated with thin layer of clear resin, then cleaning becomes much easier. But haven't tried it yet.
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