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[喷丝头类型 Spinneret Type]

湿纺喷丝板类型 Spinnerets Type

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<h3><span style="line-height: 113%; font-family: 方正姚体; font-size: 15px;">湿纺喷丝头</span></h3><p style="line-height: 14px; text-indent: 32px;"><span style="color: black; font-family: 宋体; font-size: 15px;">湿法纺丝是将溶液法制得的纺丝熔液从喷丝</span><span style="color: black; font-family: 宋体; font-size: 15px;">头</span><span style="color: black; font-family: 宋体; font-size: 15px;">的细孔中压出呈细流状，然后在凝固液中固化成丝。由于丝条凝固慢，所以湿法纺丝的纺丝速度较低，一般为</span><span style="color: black; font-family: 宋体; font-size: 15px;">50</span><span style="color: black; font-family: 宋体; font-size: 15px;">～</span><span style="color: black; font-family: 宋体; font-size: 15px;">100m/min</span><span style="color: black; font-family: 宋体; font-size: 15px;">，而喷丝板的孔数较熔体纺丝多，一般达</span><span style="color: black; font-family: 宋体; font-size: 15px;">4000</span><span style="color: black; font-family: 宋体; font-size: 15px;">～</span><span style="color: black; font-family: 宋体; font-size: 15px;">2000</span><span style="color: black; font-family: 宋体; font-size: 15px;">孔。</span></p><p style="line-height: 14px; text-indent: 32px;"><span style="color: black; font-family: 宋体; font-size: 15px;">湿法纺丝的特点是工艺流程复杂，</span><span style="color: black; font-family: 宋体; font-size: 15px;">投资大</span><span style="color: black; font-family: 宋体; font-size: 15px;">、纺丝速度低，生产成本较高。一般在短纤维生产时，通常，不能用熔体法纺丝的成纤高聚物，才用湿法纺丝和生产短纤维和长丝束。腈纶、维纶、氯纶和粘胶多采用湿法纺丝。</span></p><p style="line-height: 14px; text-indent: 32px;"><span style="color: black; font-family: 宋体; font-size: 16px;"> </span></p><p style="line-height: 14px; text-indent: 32px;"><span style="color: black; font-family: 宋体; font-size: 16px;"> </span></p><p style="text-align: left;"><span style="font-family:;" agency="">Spinnerets for Wet Spinning</span></p><p>Process of wet spinning is used for polymers that need to be dissolved in a solvent to be spun. The spinneret is submerged in a chemical bath that causes the fiber to precipitate, and then solidify, as it emerges. The process gets its name from this "wet" bath. Acrylic, rayon, aramid, modacrylic, and spandex are produced via this process.[</p><p>A variant of wet spinning is dry jet-wet spinning, where the solution is extruded into air and drawn, and then submerged into a liquid bath. This method is used in Lyocell spinning of dissolved cellulose.</p><p><span style="font-family: 宋体;"> </span></p>

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