影响小线密度玻纤直接无捻粗纱可燃物含量因素分析

Analysis of Factors Affecting the Content of Combustibles in Glass Fiber Direct Roving

在玻璃纤维小线密度直接无捻粗纱的生产过程中,由于拉丝线速度高、拉丝机转速快,容易导致纱团内筒纱线的可燃物含量偏低的情况[1]。在无捻粗纱后续使用过程中,存在较大的断纱、浸透不良的风险。本文通过固含量调整、涂覆工艺改进、变更涂覆方式等方面进行了实验改进。结果表明:小线密度纱线(300tex)在相同体系浸润剂配方,固含量[2]为7.0%时,涂覆线速度为18.86m/min时可燃物可以达到中心值;涂覆线速度为19.55m/min时可燃物含量达到最大;筒内可燃物含量由于浸润剂迁移,需要在可燃物最高处降低浸润剂涂覆线速度,以此保持内筒良好的可燃物含量情况。

In the production process of low linear density glass fiber direct roving,due to the high linear speed and high collet rpm of the fiber drawing machine,it is easy to cause low combustible matter ontent in the inner part of the roving package.In the subsequent use of the roving,there is a high risk of fiber breakage and poor wet-out.This paper describes the experimental improvements made in terms of solid content adjustment,sizing process improvement and sizing method change.The results have shown that in the case of low linear density rovings(300 tex) using the same formulation sizing agent with 7.0% solid content,the combustible matter content can reach the central value when the linear speed of sizing is 18.86 m/min,and the combustible matter content can reach the highest level when the speed is 19.55 m/min.Due to the size migration,it is required to reduce the linear speed of sizing at the highest level of combustible matter so as to maintain a good combustible matter content in the inner package.