Ultra-high-molecular-weight polyethylene (UHMWPE, UHMW) is a subset of the thermoplastic polyethylene. Also known as high-modulus polyethylene, (HMPE), or high-performance polyethylene (HPPE), it has extremely long chains, with a molecular mass usually between 2 and 6 million u. The longer chain serves to transfer load more effectively to the polymer backbone by strengthening intermolecular interactions. This results in a very tough material, with the highest impact strength of any thermoplastic presently made.
UHMWPE is odorless, tasteless, and nontoxic. It is highly resistant to corrosive chemicals except oxidizing acids; has extremely low moisture absorption and a very low coefficient of friction; is self-lubricating; and is highly resistant to abrasion, in some forms being 15 times more resistant to abrasion than carbon steel. Its coefficient of friction is significantly lower than that of nylon and acetal, and is comparable to that of polytetrafluoroethylene (PTFE, Teflon), but UHMWPE has better abrasion resistance than PTFE.
In a dream I had a final vision
How come you just want to be my friend? How come?
Will you ever have to justify
The hidden meaning in your time again, hey
I'm gone, gone just like the past because I'm gone
And you won't be the last 'cause I'll be strong
Now can you hear my voice? Because I'm gone, hey
In an ordinary complication, I come to my realization, how come?
Well, you came to me with velvet skin
How come I did let you in? How come?
I'm gone, gone just like the past because I'm gone
And you won't be the last 'cause I'll be strong
Now can you hear my voice? Because I'm gone
Still it breaks me down inside as I walk through the fire
But I am a stronger man
Nothing will change me at all, you lie
In a dream I had a final vision
How come you just want to be my friend? How come?
I'm gone, gone just like the past because I'm gone
And you won't be the last 'cause I'll be strong
Now can you hear my voice? Tonight I'm gone
I'm gone, gone just like the past because I'm gone
And you won't be the last 'cause I'll be strong