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  1. #21
    MacEntyre's Avatar
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    Quote Originally Posted by SGT Rock View Post
    Aint this the same thing that they use to pack stuff for shipping?
    Yes, Sir!

    The 1/32" Lightweight Polyethylene Foam is a very common packing material.
    - MacEntyre
    "We must, indeed, all hang together or, most assuredly, we shall all hang separately." - Ben Franklin
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  2. #22
    Senior Member JerryW's Avatar
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    It'll be interesting to see how the durability is. I have to believe that the scrim covering of IX adds at least a little durability. Possibly, with somewhat gentle handling(which is how I try to treat my stuff anyway) the unfaced foam will be good enough.

    Benefits all around - less cost, lighter weight. A winning combo!


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  3. #23
    psyculman's Avatar
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    insultex

    Quote Originally Posted by lazarus View Post
    Is PE foam the stuff that i'd have gotten as protective packing sheets -- once with certainteed vinyl shingle, and once with some window shades? I've been wearing it for a couple of years under a jacket and tucked into my pants (yes, not a diaper) as an informal booster for my mid-winter under-insulation system with great success. Never had a clue about R value. For what it's worth, I've folded/rolled/crunched it many times without degrading the sheet.
    I too have been saving the thin sheets from recieved packed items. So, will incorporate them into my anorak project, which will have 3 layers of the IX I had till I ran out, and the rest I will make with the PE scraps. Thanks so much for this post. If Insultex is what the manufacturer says, and, it becomes available to the construction industry, it will be selling dirt cheap at Home Depot, and, be blowing all over construction sites nation wide.
    Since I retired, some times I stay awake all day, some times all night.

  4. #24
    MacEntyre's Avatar
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    Quote Originally Posted by psyculman
    Thanks so much for this post.
    You are entyrely welcome!

    Quote Originally Posted by _Tinker_ View Post
    Possibly, with somewhat gentle handling(which is how I try to treat my stuff anyway) the unfaced foam will be good enough.
    Once it is encased in nylon, you can't tell the difference between Insultex and PE foam. I think it would be difficult to tear the PEF inside the nylon. Can it be more fragile than a down UQ?

    Here's the first 3/4 PEF UQ, weighing in at 8.5 oz using a WalMart nylon outer covering and 1.1 ripstop inner covering. It behaves just like an IX UQ. Thing1 used it last night, and said, "It's very warm!"

    I'm thinking of ordering some spinnaker material to go with PEF, as an intermediate step before trying cuben!
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    Last edited by MacEntyre; 09-08-2010 at 07:23.
    - MacEntyre
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  5. #25
    Senior Member Knotty's Avatar
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    Don't the little pockets created by the quilted scrim on IX contribute to the material's inusulative value?
    Knotty
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  6. #26
    MacEntyre's Avatar
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    Quote Originally Posted by Knotty View Post
    Don't the little pockets created by the quilted scrim on IX contribute to the material's inusulative value?
    It all helps, grandma said, when she spit in the well!

    IMHO, 1/32" PEF is a good bit thicker than the PE layer in Insultex. That's where the real resistance to heat transfer is... inside the foam.

    During lunch, I asked my friend Dave, who has helped me make many IX UQs, to tell me which of two UQs has IX, and which has PEF. He picked the wrong one! They are very difficult to tell apart, once they are encased in nylon.
    - MacEntyre
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  7. #27
    Senior Member SGT Rock's Avatar
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    If this stuff is strong enough, do you need both sides faced? Or are you doing that mainly for aesthetic value?

    Is this the same stuff? http://www.homedepot.com/webapp/wcs/...702&marketID=9
    Last edited by SGT Rock; 09-08-2010 at 13:23.
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  8. #28
    Senior Member Lonely Raven's Avatar
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    Quote Originally Posted by SGT Rock View Post
    If this stuff is strong enough, do you need both sides faced? Or are you doing that mainly for aesthetic value?

    Is this the same stuff? http://www.homedepot.com/webapp/wcs/...702&marketID=9
    Ikea has similar stuff. $20 for 150 square feet. That's what I was laying out this weekend and gave me the same idea this thread is based on.

  9. #29
    Senior Member Albert Skye's Avatar
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    Quote Originally Posted by MacEntyre View Post
    The board of directors of Molly Mac Gear have asked me to investigate replacing IX (Insultex) with 1/32" PE (polyethylene foam).
    You obviously have some good people on the board.

    Quote Originally Posted by MacEntyre View Post
    Yes, IX is breathable. Not very breathable, but technically it is breathable.
    It's certainly breathable through the needle holes; otherwise, I think it is no more breathable than other PE foam sheet. In any case, one wonders how a closed-cell foam can be breathable without collapsing...

  10. #30
    MacEntyre's Avatar
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    Quote Originally Posted by SGT Rock View Post
    If this stuff is strong enough, do you need both sides faced? Or are you doing that mainly for aesthetic value?
    The biggest liability with the 1/32 Lightweight PE Foam that I'm using is a tear. I would not use it without both sides faced.

    Quote Originally Posted by SGT Rock View Post
    Is this the same stuff?
    Yes, but likely thicker and heavier. Might not need both sides faced.

    Quote Originally Posted by Lonely Raven View Post
    Ikea has similar stuff.
    Yep, it's all PE foam, but most of it is thicker than 1/32", and heavier.
    - MacEntyre
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