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Author Topic: what kind of mask are you all wearing?  (Read 1070 times)

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Offline kantuckid

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Re: what kind of mask are you all wearing?
« Reply #20 on: May 01, 2020, 05:44:00 PM »
My wife does the folded bandana versions with girly hair thingys over the ears. I use a N95 from my shop. for weekly Walmart run or parts stores,etc..
Talking masks in general,  I was prepping my respirator half face mask to spray some very nasty moisture cure paint on my motorcycle frame, etc parts and seeing that I was using my last pair of pre-filters that cover the more expensive cartridge cannisters that hang on each cheek, I began to look on Amazon & ebay for a box of what "had been" cheap pre-filters- before crown virus that is... ::)
Not only had the USA company who made the mask and filters gone out of business, any other brand of anything that's close to the notion of a filter is crazy prices! I found on box of the cheapo pre-filters for nearly $40 for 5 prs. They probably cost less than ten cents to mfg..
In fact a Chinese complete half mask with cannisters and prefilters in place is cheaper than a new Chinese mask.
I didn't know medical people used cannister masks?
I think we all know why this stuff is made in China and NLA from USA mfg.'s.. 
Kan=Kansas;tuck=Kentucky;kid=what I'm not

Offline Bill

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Re: what kind of mask are you all wearing?
« Reply #21 on: May 01, 2020, 08:25:47 PM »
A bit more about my 25 year old mask, a 3m - 07179. It seems that it and most other respirators ( from 3m ) are out of stock. There may be a work around. Some spots are selling masks but without the filters. Other stores may have filters but no masks - and the prices are rising. I got 10 - particulate p95 filters ( fits over the organic ( charcoal ) filter canister )  for $20 about 2 weeks ago . Now they are unavailable east coast - west coast where ever from that auto supply .

And to note that these particular filters are rated to " occupational " use . They say not for medicinal use. I assume/guess ( ? ) they are better than a folded over bandana . . .  but it seems like most or all auto type respirators and/or replacement filters are " out of stock "  .

Online doc henderson

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Re: what kind of mask are you all wearing?
« Reply #22 on: May 01, 2020, 10:00:47 PM »
it is my understanding that an industrial mask is fine.  it had to do with liability.  so the gov. released 3M of the liability ass. with medical stuff, and many medical folks are using N95 that may have been in a hardware store a few months back.  we wear a range at work.  I have the great flag ones that Tammy made for me and my wife, surgical/procedure masks, N95s and Papr.
timberking B 2000, 277c track loader, PJ 32 foot gooseneck, 1976 F700 state dump truck, JD 850 tractor.  2007 Chevy 3500HD dually, home built log splitter 18 horse 28 gpm with 5 inch cylinder and 32 inch split range with conveyor 12 volt tarp motor

Offline peakbagger

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Re: what kind of mask are you all wearing?
« Reply #23 on: May 02, 2020, 06:37:41 PM »
I used to have to mess with respirator policy for industrial work. The reason the government standardized on N95s is that no fit test is required. Once you switch to a half mask or full mask respirators, the people using them have to be fit tested and they need a pulmonary function test (PFT) signed off by a doctor on file. if there is hazardous gas release and OSHA drops by, its almost a guarantee that they will pull the files and cite if any of the workers do no have valid PFTs and fit tests. Note many smokers and welders cannot pass a PFT so they can not use a negative pressure half or full mask.

A PFT is not needed for an N95. The problem with a N95 and most respirators are they are almost always equipped with an exhalation valve to make breathing easier. That is a direct shot from the lungs to the air with no filtering. Therefore they may be great for protecting the person wearing it from breathing in virus but not so good if the person wearing it has CV-19. The reason for the general public to wear a standard mask is not to protect them from the virus but to protect others from the virus they may be inadvertently be carrying. Sure wearing a mask may help a bit from getting it but it makes a big difference in droplet distribution to the general area from a carrier.

BTW, there is no mask that works on a beard and the individual needs to be clean shaven to get a positive seal. Its pretty simple to check, put the mask on and plug the filter inlets then breathe in, you should feel the respirator create a vacuum. P-100 filters are common and used for asbestos removal. Activated carbon filters tend to be expensive and can plug with large particulate so many come equipped with P-100 filters on top of the activated carbon which is designed to absorb gaseous contaminants. The activated carbon filters add weight and resistance to the mask but has minimal effect on pathogens so if possible skip the carbon filter and just use the prefilter. Once an employee is fit tested for a mask its usually given to them to use until they need a new one so most people in industry have a few kicking around as inevitably the company find a new supplier and switches brands. I havent done this for 12 years but found 3 half masks and several P-100 filters in stock. Usually what goes on the masks are the straps. they are supposed to be stretchy but eventually the stretchiness wears out. All three have exhalation valves so for public health purposes I really should not use them on the rare chance I am carrier (highly unlikely). I do carry one in ziplock bag along with rubber gloves. I buy boxes of industrial gloves for home projects, they are not certified sterile but work fine for barrier use. If in the event I need to get up close to someone I suspect has CV-19 or is unknown to me like a car accident, I would switch to the half mask and gloves to protect myself. I used to on occasion need to use full face masks but they fog up way to easy unless they are the supplied air type.



Online doc henderson

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Re: what kind of mask are you all wearing?
« Reply #24 on: May 02, 2020, 06:59:18 PM »
there are a variety of N95 sizes and manufacturers.  In the medical field, everyone is fit tested for the N95s.  a lot more toxic stuff in welding and other industries.  many are tough old farts that ignored their own health to get the job done.  we are not required to have PFTs.   :) :) :)
timberking B 2000, 277c track loader, PJ 32 foot gooseneck, 1976 F700 state dump truck, JD 850 tractor.  2007 Chevy 3500HD dually, home built log splitter 18 horse 28 gpm with 5 inch cylinder and 32 inch split range with conveyor 12 volt tarp motor

Offline gspren

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Re: what kind of mask are you all wearing?
« Reply #25 on: May 02, 2020, 09:40:15 PM »
If the main reason most of us are required to wear a mask in public areas is to reduce how far a cough or sneeze throws droplets then I would think that any cloth or paper mask that covers the mouth and nose should be adequate. If you are trying to protect yourself from others and you are getting up close to them then you need to think of fit and sealing and multiple layers. I see quite a few people with a bandana tied behind their head with the bottom hanging loose. I still haven't seen a good option for smoking a cigar while wearing a mask but I'm looking. :D  
Stihl 041, 044 & 261, JD 2355 4X4 w/fel, JD 620, Yamaha Kodiak 400 & trailer, Kubota 400 RTV,  P&M OWB, 75 acres to play.

Online doc henderson

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Re: what kind of mask are you all wearing?
« Reply #26 on: May 03, 2020, 02:04:58 AM »
I have come real close to taking a drink of coffee or pop through the mask.  like hitting a log stop, it will eventually happen :D.  I think coughing into a mask that you are wearing makes more sense, than the "magic elbow"  ect.  all kinds of info, most of which keeps changing.  
timberking B 2000, 277c track loader, PJ 32 foot gooseneck, 1976 F700 state dump truck, JD 850 tractor.  2007 Chevy 3500HD dually, home built log splitter 18 horse 28 gpm with 5 inch cylinder and 32 inch split range with conveyor 12 volt tarp motor

Offline Bill

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Re: what kind of mask are you all wearing?
« Reply #27 on: May 03, 2020, 09:09:45 PM »
Following up on Peakbaggers reply I will take one of the spare new p95 particulate filters and " fit " it to the exhaust - which would normally go thru a plain rubber/plastic unfiltered one way valve to the atomosphere . Kinda like a " press fit " oughta work and seal it good and in keeping with my belt and suspenders thinking . I did fiddle around with that valve to make sure nothing came in when it wasn't supposed to  . . . 
 
I have a second mask ( maybe a decade older than the 25 yr old one ) that is just the organic ( charcoal filters ) used lightly but no parts available. However the exhaust is the same as the first so I can add a " press fit " spare new p95 particulate filter to it.

Then they take turns allowing day(s ) to lapse as I alternate them and they come off pretty quick once on the way home . 


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