聚丙烯纺粘热轧法非织造布质量的内在影响因素分析

通过改变成网及固网的部分工艺,对不同生产条件下生产的产品性能,包括非织造布中的纤维直径进行了测试分析,研究了影响纺粘热轧法非织造布产品质量的内在因素。实验结果表明,在产品面密度不变时,力学性能随计量泵转速的提高而降低,硬挺度、透气性及非织造布中纤维直径随之增加,当泵转速达到一定值时出现断丝现象,产品的强力又开始下降;在泵转速一定时,面密度随轧机速度提高而下降,产品力学性能随之下降,透气性提高;在轧机速度一定时,产品面密度随泵转速提高而增大,力学性能、硬挺度随之增大,透气性下降。研究表明,网帘下的吸风量增加,会造成纤网中纤维变细,产品的力学性能上升,硬挺度与透气性下降;在其他条件不变时,随轧辊中油温的升高,产品的力学性能、硬挺度提高,透气性下降,但温度过高则会破坏纤维内部结构,其产品性能就会下降。

Study on the effects of processing parameters on the intrinsic qualities of the polypropylene spun-bonded fabrics

In this paper, by varying the parameters in the web forming and bonding processes, the effect of processing parameters on the intrinsic qualities of PP spun-bonded fabrics had been investigated. The fabric samples collected under the different productive conditions were tested in tensile strength, bursting strength , stiffness and air permeability. The production has been affected by the three parameters which contain web base weight, gear pump rotate speed and calendar velocity. Setting any one of the three parameters, the tensile strength, stiffness and air permeability of the fabric were tested and analyzed the diversification upon the web-strength ratio of machine direction to cross direction. Additionally, the fiber diameters were measured in the case of web base weight fixedness. By change these processes, the purpose of this paper is to explore the intrinsic factors that impact the quality of polypropylene melt-spinning nonwoven fabric bonded by heating rolls.