Free Tyvek!

MrZeus · 07-15-09, 09:59

You guys and gals may already know this, but if you are in the U.S. you can get all the tyvek you want for free. Delivered right to your door, courtesy of the USPS. All you have to do is go on the USPS website, go to the online store, look through all of the shipping and packaging options and you will find Tyvek envelopes, yours for the asking. Minimum quantity is 100, maximum is 500. (I think) Anyhow, thought this may be useful to those needing Tyvek.

pizark2 · 07-15-09, 10:38

thanks but a much easier way is to go into PO and grab a few from the kiosk
or go to any new construction and get a piece of scrap from dumpster or laying around on the ground

Scratch · 07-15-09, 22:05

I was wondering how much gas exchange actually
gets thru postal tyvek. Tried to breathe thru it and
seemed impervious.

Decided to try tyvek painters coversuit. $10 at slows
or homely despot. Chopped up the pants for filter
and wear the top as a cover for sterile work.

The painter suit tyvek seems more breathable.
My breath test was able to force some air thru it.

Not exactly a strictly scientific comparison.
And maybe a lot todo about nothing.

Could also be that less air exchange is a good thing.
Confusing eh?

toki_the_collector · 07-15-09, 22:31

foaf ordered some envelopes(10 is the minimum) @ his po they didn't have them. we noticed though that when you held a single layer up to your mouth and tried to blow through it.... it felt air tight is that normal?

Scratch · 07-18-09, 02:03

Quote:

Originally Posted by toki_the_collector

tried to blow through it.... it felt air tight is that normal?

Normal?
That was my experience.
I couldn't get any air to blow through.

Desirable?
Not sure, but seems a lot of folks use it.

JR4 · 07-18-09, 02:18

I use it alot and never have any problems but i have also done the breath test with the same result as above mentioned.. Does anyone know how it lets gases pass but wont let but maybe a tiny bit of air through it??/

weeeeeee · 07-18-09, 09:13

polyfill FTW! i dont use tyvek because i did siding for years and i know that shit isnt exactly made for breathing basically just a big vapor barrier...

bozefonce · 07-20-09, 21:51

It makes a difference how it's manufactured. Postal Tyvek isn't breatheable because it's made to protect the contents from moisture and be much more durable than paper. It's basically plastic. The Tyvek they use to make suits is just porous enough to let vapor and air molecules through so your body can breathe a bit, but is a pretty effective barrier against particles which are bigger than the molecules. It's a similar concept to the Gore-Tex clothing and shoes that are made for sporting and military applications. It breathes enough to let vapor and breathe a little air, but repels water droplets since the surface tension of a droplet makes it far too large to pass through the pores. I don't have any references to prove this, but we used to use those suits for asbestos removal, and yeah, you sweat a shitload in them but it's better than plastic since it breathes, yet it protects you from dirt, dust and (gasp!) asbestos particles. 'Course, we weren't breathing through tyvek filters...

MrZeus · 08-02-09, 21:49

A foaf decided to test the postal stuff....results pending. Said it was a double layer, and if it worked he might put up a simple tek.

[Home]	[The Vaults]	[Glossary]	[Sponsors]	[Affiliates]
[Search]	Today's Posts	Mark Forums Read	[Register]	[Activate]	[Resend Email]

07-15-09, 09:59	#1 (permalink)
MrZeus -=Seeker=- Join Date: Nov 2008 Posts: 202	Free Tyvek! You guys and gals may already know this, but if you are in the U.S. you can get all the tyvek you want for free. Delivered right to your door, courtesy of the USPS. All you have to do is go on the USPS website, go to the online store, look through all of the shipping and packaging options and you will find Tyvek envelopes, yours for the asking. Minimum quantity is 100, maximum is 500. (I think) Anyhow, thought this may be useful to those needing Tyvek.

07-18-09, 02:18	#6 (permalink)
JR4 Former Member Join Date: Feb 2008 Posts: 252	I use I use it alot and never have any problems but i have also done the breath test with the same result as above mentioned.. Does anyone know how it lets gases pass but wont let but maybe a tiny bit of air through it??/

07-18-09, 09:13	#7 (permalink)
weeeeeee humanoid Join Date: Jan 2008 Posts: 1,851	polyfill FTW! i dont use tyvek because i did siding for years and i know that shit isnt exactly made for breathing basically just a big vapor barrier... __________________ -p.l.u.r

07-20-09, 21:51	#8 (permalink)
bozefonce Ni arte, ni maña Join Date: Dec 2008 Posts: 287	It makes a difference how it's manufactured. Postal Tyvek isn't breatheable because it's made to protect the contents from moisture and be much more durable than paper. It's basically plastic. The Tyvek they use to make suits is just porous enough to let vapor and air molecules through so your body can breathe a bit, but is a pretty effective barrier against particles which are bigger than the molecules. It's a similar concept to the Gore-Tex clothing and shoes that are made for sporting and military applications. It breathes enough to let vapor and breathe a little air, but repels water droplets since the surface tension of a droplet makes it far too large to pass through the pores. I don't have any references to prove this, but we used to use those suits for asbestos removal, and yeah, you sweat a shitload in them but it's better than plastic since it breathes, yet it protects you from dirt, dust and (gasp!) asbestos particles. 'Course, we weren't breathing through tyvek filters... __________________ If thoughts are things, then dreams are bigger things…

07-15-09, 10:38	#2 (permalink)
pizark2 Mycophage Join Date: Jun 2006 Posts: 207	thanks but a much easier way is to go into PO and grab a few from the kiosk or go to any new construction and get a piece of scrap from dumpster or laying around on the ground

07-15-09, 22:05	#3 (permalink)
Scratch and sniff Join Date: Feb 2009 Posts: 314	I was wondering how much gas exchange actually gets thru postal tyvek. Tried to breathe thru it and seemed impervious. Decided to try tyvek painters coversuit. $10 at slows or homely despot. Chopped up the pants for filter and wear the top as a cover for sterile work. The painter suit tyvek seems more breathable. My breath test was able to force some air thru it. Not exactly a strictly scientific comparison. And maybe a lot todo about nothing. Could also be that less air exchange is a good thing. Confusing eh?

07-15-09, 22:31	#4 (permalink)
toki_the_collector staycation trip provider Join Date: Jun 2009 Posts: 40	foaf ordered some envelopes(10 is the minimum) @ his po they didn't have them. we noticed though that when you held a single layer up to your mouth and tried to blow through it.... it felt air tight is that normal?

08-02-09, 21:49	#9 (permalink)
MrZeus -=Seeker=- Join Date: Nov 2008 Posts: 202	A foaf decided to test the postal stuff....results pending. Said it was a double layer, and if it worked he might put up a simple tek. Attached Thumbnails

Thread Tools
Show Printable Version Email this Page
Display Modes
Linear Mode Switch to Hybrid Mode Switch to Threaded Mode