ターボステープラの熱延伸に関する研究
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概要
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The effect of temperature on the load-elongation properties of acrylic-fiber has been studied. Alpo, heat transfer to tow from heat-plates of a Turbo Stapler has been theoretically looked into. The results are as follows:<BR>(1) The elongation of an acrylic fiber is —lnε=a-bω-cθ<BR>where ε: elongation w: load<BR>θ: fiber temperature a, b, c: constants<BR>(2) The temperature of tow put between top and bottom plates is:<BR>(a) θ<SUB>x</SUB>=-θ(θ-θ<SUB>0</SUB>) exp (-k<SUB>H</SUB> / G<SUB>c</SUB> x) (Heat-transmission model)<BR>(b)100<SUP>4</SUP> / 2T<SUP>3</SUP><SUB>p</SUB>{(tan<SUP>-1</SUP>φ<SUB>x</SUB>-tan<SUP>-1</SUP>φ<SUB>0</SUB>)+(tanh<SUP>-1</SUP>φ<SUB>x</SUB>+tanh<SUP>-1</SUP>φ<SUB>0</SUB>)}=2k<SUB>0</SUB>H / cG x <BR>(Radiation model)<BR>(3) To get the same tow temperature, the temperature of a heat plate with clearance 3.5 mm wide must be 40∼50°C higher than that of a plate with a clearance 4mm wide.<BR>(4) The higher the heat-plate temperature, the narrowert the heat-plate clearance, the longer the heat-plate longer, and the less necessary is stretch-force.<BR>(5) The necessary stretch-force is 1.4∼2.2 times longer if the heat-plate clearance is narrow and if a single heater is used.