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Offlinejivangilad
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cannot blow through Tyvek filter
    #21311904 - 02/22/15 07:28 AM (9 years, 10 months ago)

I bought Tyvek paper.
I cannot blow through it, so I assume it wont be good as filter.
By the way they also had tyvek cloth, and I could not blow through it either.
What is wrong?

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Offlineinvitro

Registered: 05/03/13
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Re: cannot blow through Tyvek filter [Re: jivangilad]
    #21312028 - 02/22/15 08:52 AM (9 years, 10 months ago)

blowing is not a good test of filtration in this hobby, you can blow through a coffee filter also but noone would use it to keep spores out.

Edited by invitro (02/22/15 11:53 AM)

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InvisiblebodhisattaMDiscordReddit
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Re: cannot blow through Tyvek filter [Re: invitro]
    #21312098 - 02/22/15 09:18 AM (9 years, 10 months ago)

why do you for some reason think blowing through it is a good test?

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OfflineGroo
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Re: cannot blow through Tyvek filter [Re: bodhisatta]
    #21312193 - 02/22/15 09:58 AM (9 years, 10 months ago)

My wife does the same test to me less often that I'd like But that's life works every time LOLOLOL.

But no seriously, I roll up poly felt into my jar lids as a air exchange. I stuff it though the holes and looks like snails. I blow through them to test that there is enough air resistance. The proper amount of resistance signifies (TO ME) that the size of the holes are restricted enough to stop the bullshit from getting in during myc dinner time. Works like a charm especially like the face I got this felt stuff for free from a trash can dumpster diving one day.

Edited by Groo (02/22/15 10:00 AM)

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Invisiblefilthyknees
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Re: cannot blow through Tyvek filter [Re: Groo]
    #21312214 - 02/22/15 10:05 AM (9 years, 10 months ago)

Quote:

Groo said:
I got this felt stuff for free from a trash can dumpster diving one day.




:thumbup::thumbup:


--------------------
But if you're in a hurry, and really got to go
If you're in a hurry, might have to find out slow
That it's one thing to try and another to fly
You get there quicker just a step at a time
It's one thing to bark, another to bite
The show ain't over till you pack up at night

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Offlinerandoman
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Re: cannot blow through Tyvek filter [Re: filthyknees]
    #21312240 - 02/22/15 10:13 AM (9 years, 10 months ago)

Wait.... you bought tyvek!  Just go to the post office. Free


--------------------
The possibility of physical and mental collapse is now very real. No sympathy for the Devil, keep that in mind. Buy the ticket, take the ride. Hunter S. Thompson
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Offlinejivangilad
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Re: cannot blow through Tyvek filter [Re: bodhisatta]
    #21312288 - 02/22/15 10:24 AM (9 years, 10 months ago)

Quote:

bodhisatta said:
why do you for some reason think blowing through it is a good test?



I thought if I cannot blow through it, then gas cannot pass, and there will be no gas exchange. so even if I cannot blow through it, gas can pass?

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OfflineSynKyd
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Re: cannot blow through Tyvek filter [Re: jivangilad]
    #21312297 - 02/22/15 10:28 AM (9 years, 10 months ago)

This is a poor test. Tyvek works, it's proven.  Make some jars with it you'll be fine.


--------------------

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Offlinerandoman
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Re: cannot blow through Tyvek filter [Re: SynKyd]
    #21312309 - 02/22/15 10:32 AM (9 years, 10 months ago)

I am a carpenter and tyvek is used as a vapor barrier, before installing siding.

It keeps water out. While allowing your home and the materials it is built with some Ge.


--------------------
The possibility of physical and mental collapse is now very real. No sympathy for the Devil, keep that in mind. Buy the ticket, take the ride. Hunter S. Thompson
The Noob Forum:jah:Getting started:bow2::rockon::rockon:
Wanna Trade?

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Offlinerandoman
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Re: cannot blow through Tyvek filter [Re: randoman]
    #21312313 - 02/22/15 10:33 AM (9 years, 10 months ago)

In short it will work even if you cant blow it!


--------------------
The possibility of physical and mental collapse is now very real. No sympathy for the Devil, keep that in mind. Buy the ticket, take the ride. Hunter S. Thompson
The Noob Forum:jah:Getting started:bow2::rockon::rockon:
Wanna Trade?

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OfflineFreeWorldOrder
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Re: cannot blow through Tyvek filter [Re: randoman]
    #21312345 - 02/22/15 10:44 AM (9 years, 10 months ago)

Quote:

randoman said:
Wait.... you bought tyvek!  Just go to the post office. Free




I am not 100% sure on this... but I believe that some of the PO tyvek has changed. Seems they are using some type of plastic or polymer in it now. At least some of the envelopes I recently picked up are different than they were previously.

If you want to use tyvek I'd just get one of those tyvek suits that people wear to paint in or do a dirty job.... will give you enough tyvek for years...  :thumbup:

Personally, I prefer polyfill over tyvek, but that's more of a personal preference type thing.


--------------------
"They who can give up essential liberty, to obtain a little temporary safety, deserve neither liberty nor safety." - Benjamin Franklin

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Offlinerandoman
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Re: cannot blow through Tyvek filter [Re: FreeWorldOrder]
    #21312369 - 02/22/15 10:49 AM (9 years, 10 months ago)

Yea I don't know about the p.o. now??? I did grab a stack of tyvek ones from there last year though! And honestly the construction tyvek usually has some pretty decent sized holes in it.

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InvisiblebodhisattaMDiscordReddit
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Re: cannot blow through Tyvek filter [Re: randoman]
    #21312388 - 02/22/15 10:54 AM (9 years, 10 months ago)

kite tyvek works better than post office tyvek according to RR. but most people use post office tyvek. you can grab an envelope for free. tyvek is just plastic produced in a unique architecture which makes it act as a gas permeable membrane.

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Invisiblefilthyknees
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Re: cannot blow through Tyvek filter [Re: bodhisatta]
    #21312672 - 02/22/15 11:52 AM (9 years, 10 months ago)

post offices still carry tyvek envelopes. for me they are near the kiosk/self-serve area where the machine to buy stamps is located.


--------------------
But if you're in a hurry, and really got to go
If you're in a hurry, might have to find out slow
That it's one thing to try and another to fly
You get there quicker just a step at a time
It's one thing to bark, another to bite
The show ain't over till you pack up at night

Extras: Filter Print Post Top
Offlinesecretagent
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Last seen: 9 years, 7 months
Re: cannot blow through Tyvek filter [Re: randoman]
    #21312914 - 02/22/15 12:48 PM (9 years, 10 months ago)

Quote:

FreeWorldOrder said:
Quote:

randoman said:
Wait.... you bought tyvek!  Just go to the post office. Free




I am not 100% sure on this... but I believe that some of the PO tyvek has changed. Seems they are using some type of plastic or polymer in it now. At least some of the envelopes I recently picked up are different than they were previously...




Just like bodhisatta said, tyvek is simply an architecture. It is made from high density polyethylene (HDPE for short). It's a really simple monomer that looks like this:
Code:

H H
- C - C -
H H


That's the beauty of some polymers. Take a small structure, and just link it together with many like it!
Science at work! :rocket: :sun:
Quote:

randoman said:
Wait.... you bought tyvek!  Just go to the post office. Free



In Europe it isn't standard with Tyvek envelopes :/

Edited by secretagent (02/22/15 01:00 PM)

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