I thought the Kevlar in this case was of the weaker variety.. I stand corrected
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Not aware of a weaker variety. Kevlar is a trademark name for the molecular formula, so Kevlar is Kevlar. There are various grades, each with specific properties for various applications. I believe the methods of extrusion determine the variety and properties.
Several grades of Kevlar are available:
1. Kevlar K-29 – in industrial applications, such as cables, asbestos replacement, brake linings, and body/vehicle armor.
2. Kevlar K49 – high modulus used in cable and rope products.
3. Kevlar K100 – colored version of Kevlar
4. Kevlar K119 – higher-elongation, flexible and more fatigue resistant.
5. Kevlar K129 – higher tenacity for ballistic applications.
6. Kevlar AP – has 15% higher tensile strength than K-29. [10]
7. Kevlar XP – lighter weight resin and KM2 plusfiber combination. [11]
8. Kevlar KM2 – enhanced ballistic resistance for armor applications [12]
I am not sure but would wager that either K-29 out K49 were the grade used on the RAZR, and my best guess would be K-29 as it's the most commonly used and plays a ripple in body armor.
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