Non-Metallic knives?

jeffsenpai

jeffsenpai

Gold Member
Joined
Feb 24, 2010
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Hi!

I came here to ask whether or not plastic/polymer bladed knives have any real use or utility, or are they merely a gimmick?

Many times they are advertised as "letter-openers", but I have seen several that were aimed at self-defense purposes - do plastic blades retain a sharp edge, or are they possible to sharpen?

here is a folder, all plastic/polymer:


saw this on on http://www.gunnersecurity.com/knife-blackie-collins.html
but there are many sites selling these and variants.
 
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Everything I've heard so far has pointed to them existing purely to get past metal detectors with little to no real edge retention, really just good for poking things (or people I suppose) Maybe someone else knows differently
 
Well, Ceramic knives aren't metal, and you can definately sharpen those to a fine edge with incredible retention, better than steel but chippable.
 
I had a CS shank years ago, made out of some super hard polymer and you could stab it through a couple of double layers of industrial packaging cardboard.

You definitely could have buried it to the hilt into a zombie but it wouldn't whittle worth a da**! :)
 
and then there's the good old fashion wooden "stake" which is essentially what a plastic "letter opener" is...
let's cut thru the chase (come on, plastic with a great rockwell hardness?) and see that's it's really all about the point which matters.
 
cziv said:
I had a CS shank years ago, made out of some super hard polymer and you could stab it through a couple of double layers of industrial packaging cardboard.

You definitely could have buried it to the hilt into a zombie but it wouldn't whittle worth a da**! :)
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So, useful for terrorists only... unless they have metal detectors where you go camping :D
 
I have made a few "knives" from G-10 and carbon fiber. Any knife made of G-10 or polimers of somesort is pretty much just a choory. They have rather poor cutting performance but they do have good stabbing ability. They are obviously very light and easy to carry as well. The Warren Thomas knives made with laminated materials are the best way around the problems while still using non ferrous metals for the most part (he does do steel blades as well as Ti). A folder made purely of polimer or G-10 is probably going to be of little use other than sitting on a desk or in a drawer. Fixed blades geard at stabbing are going to be way more usefull, something like the carbon fiber knives Mark Terrel makes.

As mentioned though, there is the potential problem of who would want these knives and why. Any one who takes a knife like that into a sensitive area as a self defence tool is asking for big trouble. The other obvious problem would be people who take those knives in to a sensitive area looking for trouble.
 
Well, I have zero interest in self defense usage, but wouldn't such a plastic knife be capable enough for that kind of usage?
 
i'll ride the road with Haze on this one. one moving in this direction could as well use flame hardened bois d'arc.personally i can see little use outside of terriosts.if a person really needs a undetected weapon i'd choose white vinegar in a nasal spray bottle . works for agressive dogs, i have 1st hand experience.
 
i'd choose white vinegar in a nasal spray bottle . works for agressive dogs, i have 1st hand experience
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Good nugget DennisStrickland

they are for stabbing and getting past metal detectors. and that's it
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That's not what BLACKIE COLLINS says darnnit!

These knives are being used in Iraq to disarm IED's
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What makes me think that BLACKIE is full of sh**? :D

BTW, emperorwang - your avatar rocks - Semper Fi Bro!
 
Plastic knife:
support_dixie_smartstock_knifeRefill.jpg

Tactical too.
 
I better get my gold membership and post on the Knife Exchamge. My wife has two boxes full of those GWashington1732
 
cziv said:
I better get my gold membership and post on the Knife Exchamge. My wife has two boxes full of those GWashington1732
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I just bought a box of 200 for $2.50. I'm gonna take them right outside and put them to the ultimate test. At under $.02 a piece who cares if I break a couple battoning through a log?:D
 
GWashington1732 said:
I just bought a box of 200 for $2.50. I'm gonna take them right outside and put them to the ultimate test. At under $.02 a piece who cares if I break a couple battoning through a log?:D
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I bet you make it though! HAHA

When you are all done, just melt them back together and you have a nice high quality blade again! Lets see you do that with a stupid steal knife. :confused:
 
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