阻燃腈纶/芳纶包芯纱的制备及其紫外光稳定性

针对芳纶紫外光稳定性差易发生光降解老化的问题，制备外包阻燃腈纶、芳纶为芯纱的包芯纱，用来阻断紫外线对芳纶的直接照射。设计芳纶/芳纶、阻燃腈纶/芳纶、腈氯纶/芳纶、阻燃腈纶/阻燃粘胶/芳纶、阻燃腈纶/阻燃莫代尔/芳纶5种包芯纱，并以包芯纱为纬纱，芳纶为经纱织造织物，测试织物的紫外光老化性、舒适性及阻燃性。结果表明：与纯芳纶织物相比，阻燃腈纶/芳纶、阻燃腈纶/阻燃粘胶/芳纶、阻燃腈纶/阻燃莫代尔/芳纶3种织物的紫外线防护系数分别提高25.8%、18.7%、20.8%,断裂强力分别下降23.1%、37.9%、27.0%,续燃时间分别延长0.9、0.2、0.2 s,阴燃时间分别延长0.3、0.4、0.7 s;老化前后纯芳纶、阻燃腈纶/芳纶、阻燃腈纶/阻燃粘胶/芳纶、阻燃腈纶/阻燃莫代尔/芳纶4种织物断裂强力分别下降43.6%、5.9%、8.3%、9.1%;阻燃腈纶/芳纶织物的舒适性能下降，但阻燃腈纶/阻燃粘胶/芳纶织物的舒适性有所提高；阻燃腈纶/阻燃粘胶/芳纶包芯纱的综合性能最佳，具有良好的紫外光稳定性、舒适性及阻燃性。

Preparation and UV stability of flame-retardant acrylic/aramid core-spun yarns

Objective Aramid fiber has become the most widely used high performance fiber for protective fabrics because of its good flame retardancy and chemical stability. But, due to the penetration of the molecular chain contains a lot of chromogenic groups, it is prone to aging degradation under high-energy rays, especially UV light, and the UV aging performance seriously affected usability of the aramid products used outdoors. Therefore, it is necessary to study how to improve the UV aging resistance of aramid fiber in fabrics.