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Ballistic Protection / Body Armor / Go into your Kitchen

Discussion in 'Preparedness & Survival' started by 7SFCW4, Nov 15, 2013.

  1. 7SFCW4

    7SFCW4 Out and About, Oregon Active Member

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    Good Morning, One of the best kept secrets about ballistic protection is HDPE. High Density Poly-Ethelene. You probably have some of this "...body armor..." at home and don't even realize it. Go into your kitchen and look for a white plastic cutting board. A 3/4 inch thick piece of HDPE will stop a 230 grain .45 ACP dead in it's tracks, is will only penetrate about 3/4 of the way thru.

    I can just hear the hoots now, "...what a moron...".

    If you purchase two sheets of 3/4 inch HDPE and Gorilla Glue a 1/4 inch sheet of Aluminum between them, you will be surprised, should you fire thru this with a chronograph on the far end. Your average .223 or .308 rifle round may get thru, but it is far from lethal.

    HDPE is not light, but, it's lighter than a sheet of Boron-Carbide level 4A plate. And you can heat it in the over and mold it to fit about any contour.

    Body armor is line NODS/NVG, it can be a game changer. Don't scrimp. The folks at "BulletProofMe" can assist you over the phone, and more often that not, over the phone will discuss military over runs in stock at substantial savings.

    But if you are looking for a low cost, low weight, engine block saver. Look no further.
     
  2. U201491

    U201491 Well-Known Member

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    Other names are Marine Plywood,
    Starboard, UHMW,

    and another item is any polycarbonate sheeting of proper thickness.
    1" can stop a 30 cal round.
     
    lowly monk and (deleted member) like this.
  3. Riot

    Riot Benton County, Washington Well-Known Member

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  4. Sabertooth

    Sabertooth Josephine County Active Member

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    Or you could borrow that plastic peace of material on the bottom of your neighbors drift boat.
     
    mjbskwim and (deleted member) like this.
  5. AMProducts

    AMProducts Maple Valley, WA Jerk, Ammo Manufacturer Silver Supporter

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    I've been reading about experiments with UHMWPE (ultra-high molecular weight poly ethylene) a decidedly different species than HDPE (high density poly ethylene). However I have yet to try any experiments, that said, there is a decided difference between HDPE and UHMWPE. The most important part, is that what makes a material UHMW is the cross linking between the polyethylene chains. It also seems that the UHMWPE is acting as a semi-rigid substrate for a spectra fabric, this is far from being a cutting board.

    In the theme of "extraordinary claims require extraordinary evidence"... lets see it, because right now you're looking to be in the "moron" (your words) camp.
     
  6. Jamie6.5

    Jamie6.5 Western OR Well-Known Member

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    Good luck trying to glue HDPE to anything, even itself. Plastic welding works when attaching it to itself though. This is true of all polyethylenes, which are members of the polyolefin family.

    3M has been working on a glue/cement for it for years, with marginal results, and it is expensive.
    Super glue will not work, if the joint is stressed at all, it will just pop apart.
    If you want to laminate it to something like aluminum sheet, mechanical fasteners like screws or rivets would be an option.

    When dealing with PE tarps (the blue plastic ones) one of the best ways is still good ol' duct tape on a clean section. But nothing permanent has been developed yet.
     
    Last edited: Mar 3, 2014
    Dunerunner and (deleted member) like this.
  7. 1337BaldEagle

    1337BaldEagle Earth Active Member

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  8. Riot

    Riot Benton County, Washington Well-Known Member

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    I've had good results with Gorilla Glue
     
  9. cookie

    cookie THE SOCIALIST STATE OF KALI - FORNIA Well-Known Member

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    I wouldn't stand behind the cutting boards and feel protected.
     
  10. Jamie6.5

    Jamie6.5 Western OR Well-Known Member

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    That's great Riot!
    From the GG website:
    Gorilla Glue - Gorilla Glue Guide
     
  11. mjbskwim

    mjbskwim Salmon,Idaho Well-Known Member

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    And you better hurry and get it on cause you'll need it when he catches you
     
  12. erudne

    erudne The Pie Matrix PPL Say Sleeping W/Your Rifle Is A bad Thing? Bronze Supporter

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    You expect me to give-up fried spuds for a bullet proof vest?
    Ye be a mad man, a Mad Man!!!!!
     
    Two Dogz likes this.
  13. chemist

    chemist Beaverton OR Well-Known Member

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    Two things make UHMWPE a ballistic material, and HDPE cutting boards fail:
    1) Extremely long polymer chains, which are linear, not cross-linked, and
    2) Alignment of those chains, stretching them out to their full length in the fiber direction.

    It's way too high tech to make PE armor yourself, but you can at least demonstrate the principle-
    Take one of those thin, crispy, plastic bags and carefully pull a flat, smooth section of it until it yields. It stretches a certain distance and then becomes much stronger and less elastic. At the same time its transparency changes. Both effects are due to strain-alignment crystallization as you convert the amorphous (or biaxial, anyway) linear polymer to a uniaxially aligned, lamellar form.

    If you started with UHMWPE (which is hard to make), and could do that strain-alignment stretching perfectly, you could create your own Spectra fiber, and lay it up into armor. In other words, there's a very good reason why it's expensive, and they've done a darn good job of getting the cost down, in fact. As a polymer chemist, I consider it nothing short of a miracle.

    One other thing about soft armor: the way it's laminated affects its performance, just like in all composites, whether rigid or flexible. If the matrix is too hard, the fibers will snap off under load. Too soft, and the fibers pull completely out. An ideal marriage of a fiber in a matrix allows some pullout before failure, which spreads the load, arrests fractures, and imparts fatigue resistance. There's a lot to this stuff, in both the materials and the engineering.

    Personally, I think six hundred bucks for a thin, light, durable garment that will stop a pistol threat is a freakin' BARGAIN.
     
    ocarolan and mjbskwim like this.
  14. mjbskwim

    mjbskwim Salmon,Idaho Well-Known Member

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    I been tryin' to tell folks this for years
     
  15. Stomper

    Stomper Oceania Rising White Is The New Brown Silver Supporter

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    Kevlar....
     
  16. JustShoot

    JustShoot Oregon . Hillsborito area Active Member

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    -
    I been sewing fibers for many years and Aramid Fiber ( Kevlar/Nomex etc. ) and your discussion of UHMWPE are, ( I Think ) my friends are a close genetic kin of each other .
    -
     
  17. erudne

    erudne The Pie Matrix PPL Say Sleeping W/Your Rifle Is A bad Thing? Bronze Supporter

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    AR 500
     
  18. Stomper

    Stomper Oceania Rising White Is The New Brown Silver Supporter

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    AR don't float! ;-)
     
  19. 7SFCW4

    7SFCW4 Out and About, Oregon Active Member

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    Wow! I L O V E a good rant!

    Don't get me wrong. Me and Mine, we have Promax Military OTV body armor. For the vehicles, yes, I do have some HDPE where it counts. I have no illusions that I have the medical skills to fix ballistic wounds of which I have experienced too many in the past. But, should one fine ones self in some James Bond'esque situation without ones body armor, your inner McGuyver may need some Matrix like data to pull from. Around the normal home, other than linear feet of paper, HDPE is handy and available. As the wise man once said, "...improvise, adapt, overcome...", and most of all, live to fight another day.
     
  20. Mark W.

    Mark W. Silverton, OR Bronze Supporter Bronze Supporter

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    I'll stick with a sheet of .200" thick 4AL 6V Titanium. I watched a .060" piece of it stop a factory 124gr 9mm round from less then 2 yards. It made a heck of a dent in the metal and a tiny bit of copper or lead might have gotten through but less then a #8 bird shot pellet.