High strength fiber weakening - Nylon and Spectra
NYLON WEAKENING & SPECTRA INFO FROM BLUE WATER
SPECTRA Technical Information What is SPECTRA ? SPECTRA is, quite simply, the strongest fiber ever made. Pound for pound, it is ten times stronger than steel. SPECTRA was developed by the High Performance Fibers Group of Allied-Signal Inc. SPECTRA's extensive physical properties offer benefits that make it ideal for chock cord and webbing applications. SPECTRA is an ultra-high molecular weight polyethylene that exhibits outstanding properties: Low specific gravity High specific strength Low moisture sensitivity Excellent chemical resistance High impact resistance High energy to break High specific modulus High abrasion resistance Excellent electrical properties Outstanding Performance Excellent cut and abrasion resistance SPECTRA high performance fiber offer unsurpassed cut resistance and durability. SPECTRA is far superior to any high performance fiber in its abrasion resistance. There physical parameters are responsible for this. 1) High tensile modulus - which gives the fiber a very high breaking strength. 2) Low coefficient friction - causes the cutting edge to literally "slide" over the yarn construction inflicting a minimum amount of cut or abrasion damage. 3) High molecular weight fiber - yielding a large degree of structural integrity within the individual filaments. Temperature Limit = 250 F SPECTRA is a registered trademark of Allied Signal Inc BLUE WATER is a registered trademark of Blue Water Ropes & Equipment. Kevlar is a registered trademark of E.I. Dupont de Nemouis & Co. Why Blue Water SPECTRA products? a) Excellent Protection and Long Wear Durability. Far greater life span than other products. b) Better Performance. More flexible, stronger, and lighter than other products. c) Quality and safety. Blue Water has one of the finest quality control systems in the world which assures top, consistent quality in all Blue Water products. d) SPECTRA Thread on all stitching. All bar tacks are stitched with SPECTRA thread to yield longer life and more abrasion resistance. SPECTRA and Ultraviolet Rays In a test of the effects of U.V. light on fibers in accordance with AATC standards, samples of SPECTRA, Kevlar, Nylon, and Polyester were subjected to 400 hours of direct exposure to U.V. rays. Figures listed are percent of strength retention after exposure. As you can see SPECTRA outperformed Kevlar in resistance to ultraviolet radiation. SPECTRA Kevlar Nylon Polyester Xenon Method 16E 72% 56% 91% 50% Chemical Resistance SPECTRA's polyethylene molecular structure makes it inert to chemical reaction. The strength retention values obtained after 6 months immersion is indicated in the chart. Agent SPECTRA Aramid* Sea Water 100% 100% Hydraulic Fluid 100% 100% Kerosene 100% 100% Gasoline 100% 93% Glacial acetic acid 100% 72% 1M Hydrochloric acid 100% 82% 5M Sodium Hydroxide 100% 40% Ammonium Hydroxide (29%) 100% 42% Hypophosphite solution (5%) 100% 70% Perchlorethylene 100% 79% (10%) detergent solution 100% 75% Clorox 91% 0% * The most common aramid fiber in the climbing industry.
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I have purchased some spectra fabric and some spectra thread. The thread is about 4 times stronger than nylon thread of similar diameter. It is quite expensive stuff. Fabric is roughly $34 per yard (50 inches wide) 3.1 oz/sq yard weight. It is quite abrasion resistant. I scraped both threads with an x-acto knife and looked at the results under a microscope. I haven't made anything yet, but I plan to.
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