Кевлар накаливания

kevlar fiber filament 1140 Denier; 768 Filaments. Kevlar® 49 is a high-modulus type used primarily in fiber optic cable, textile processing, plastic reinforcement, ropes, cables, and composites for marine sporting goods and aerospace applications. General KEVLAR Information: DuPont Kevlar® poly-para-phenylene terephthalamide (aramid) has a unique combination of high strength, high modulus, toughness, and thermal stability. It was developed for demanding industrial and advanced-technology applications. It is chemically stable under a wide variety of exposure conditions; however, certain strong aqueous acids, bases, and sodium hypochlorite can cause degradation, particularly over long periods of time and at elevated temperatures. Information provided by DuPont. Pict Physical PropertiesMetricEnglishCommentsDensity1.44 g/cc0.0520 lb/in³Water Absorption3.50%3.50%As shipped; Typical moisture levels on yarn as shipped; they reflect values reached at normal, moderate temperature and humidity levels following fiber production, which is a wet process.Moisture Absorption at Equilibrium3.50%3.50%Equilibrium from Bone-Dry Yarn; Equilibrium values are determined by bone drying the fiber and condition at 75°F (24°C), 55% RH.Mechanical PropertiesMetricEnglishCommentsTensile Strength, Ultimate3000 MPa435000 psiBreaking Tenacity3620 MPa525000 psiEpoxy-impregnated strands, ASTM D2343Tenacity2.08 N/tex23.6 g/denierElongation at Break2.40%2.40%Tensile Modulus112 GPa16300 ksiPoissons Ratio0.360.36Thermal PropertiesMetricEnglishCommentsSpecific Heat Capacity0.340 J/g-°C0.0813 BTU/lb-°F@Temperature 25.0 °C@Temperature 77.0 °FThermal Conductivity0.0400 W/m-K0.278 BTU-in/hr-ft²-°FMaximum Service Temperature, Air149 - 177 °C300 - 351 °FFor long-term useShrinkage<= 0.100 %<= 0.100 %In water at 212°F (100°C) and in air at 351°F (177°C)