I would like to know the grade of polyethylene used in the hard plates
in some body armours?

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Request for Question Clarification by pafalafa-ga on 09 Nov 2004 05:14 PST

Is this the type of thing you're referring to...?


http://www.military.com/NewsContent/0,13319,usa3_042104.00.html



This article mentions that Kevlar -- the current standard material for
many body armors -- is being combined with polyethylene glycol and
silicon to make an even tougher grade of material with special
properties.

Let me know if this is what you're after.

pafalafa-ga

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Request for Question Clarification by tutuzdad-ga on 09 Nov 2004 07:42 PST

Dear keith1426-ga;

These documents should give you an overall outlook on the grade of
ballistic resistant polyethylene ECPE (extended chain polyethylene)
that is used for body armor by the military in order to meet the
MIL-C-44050A standard or other required threats.

ARMORS
http://www.pinnaclearmor.com/new/armors.html

US ARMY
http://www.goordnance.apg.army.mil/Opp/data/Newsletter%20(Feb)3.pdf
(Pages 24-27 specifically)


Please be kind enough to let me know if this provides a sufficient
answer to your question.

Best regards;
Tutuzdad-ga ? Google Answers Researcher

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Clarification of Question by keith1426-ga on 09 Nov 2004 19:23 PST

I am after the type of polyethylene used e.g. PEUHMWPE the answer from
tutuzdad-ga is closest to what I am after.

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Request for Question Clarification by tutuzdad-ga on 09 Nov 2004 19:31 PST

Can you elaborate on your reference to "PEUHMWPE" please?

tutuzdad-ga

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Clarification of Question by keith1426-ga on 09 Nov 2004 20:24 PST

Polyethylene ultra high molecular weight (PEUHMW). I am sorry about
the error I made by removing the space after the W PEUHMW. Your answer
is close, I would just like to know  the weight type of the
polyethylene. If you have no luck please submit your answer  and I
will happily accecpt as the information is very helpful.

Dear keith1426-ga;

Thank you for allowing me an opportunity to answer your interesting
question. In addition to what I have already found, I will also offer
this that may be useful as well:

UHMW-PE (Ultra High Molecular Weight Polyethylene) is a polymer with a
molecular weight of 3 and 6 million. This is a impact strength 8 times
greater than HDPE. ?In a ballistics test conducted at -65°F, a 1? slab
of UHMW-PE stopped a .45 caliber bullet at a distance of only 25 ft?.

TEKRIDER
http://www.tekrider.com/sxproshort.htm

?UHMW has a molecular weight of 4,500,000 to 6,000,000 as compared to
high density polyethylene which has a molecular weight of 500,000 or
less, or when compared to low density polyethylene with a molecular
weight of 50,000 or less.?
SAILING FORUM ARCHIVE
http://www.j24class.org/usa/forumarchives/sailsandtuning/mastpartner.html

I welcome your rating and your final comments and I look forward to
working with you again in the near future. Thank you for bringing your
question to us.

Best regards;
Tutuzdad ? Google Answers Researcher


INFORMATION SOURCES

Defined above


SEARCH STRATEGY


SEARCH ENGINES USED:

Google ://www.google.com




SEARCH TERMS USED:

UHMW

UHMW-PE

MOLECULAR WEIGHT

MILLION

BODY ARMOR

Thanks very much for the great work. I look forward to working with you again.