纤维直径对玻璃棉纤维纸结构和性能的影响

Effect of Fiber Diameter on the Structure and Properties of Glass Fiber Paper

关键词:  玻璃棉  纤维直径  孔隙率  导热系数

Key Words:glass fiber  fiber diameter  porosity  thermal conductivity

摘要:在测量玻璃棉纤维直径的基础上,利用扫描电子显微镜、压汞仪和热线法通用导热系数仪,研究了纤维直径对玻璃棉纤维纸微观结构和宏观性能的影响。结果表明,玻璃棉纤维直径的变化会影响纸张的孔隙结构,直径越小,纤维间的孔隙尺寸越小,孔隙间相互连通程度越低；随着玻璃棉纤维平均直径的降低,孔隙率成明显增大的趋势；相同定量的手抄片,纤维平均直径越小,纸张的厚度越大,透气度越小；玻璃棉纤维纸的导热系数随纤维直径的减小,有明显降低的趋势,当玻璃棉纤维平均直径小于1 μm时,导热系数随直径的变化较明显,且直径越小,导热系数减小得越快。

Abstract:Based on the measurement of glass fiber diameters, the effect of glass fiber diameter on the microstructure and properties of glass fiber paper was studied mainly by scanning electron microscope, mercury porosimetry and thermal conductivity tester using hot-wire method. The results showed that the pore structure of the sheet would be influenced by fiber diameter, and the smaller the fiber diameter, the smaller of the pore size in the fiber network, the lower of the interconnection degree between the pores. The porosity rate showed a significant increase trend with the decrease of fiber diameter., the thickness of the sheet increased but the air permeability decreased with the fiber diameter decreasing on the same basis weight. The thermal conductivity of glass fiber paper decreased significantly with the decrease of fiber diameter. The change of thermal conductivity of the paper along with the change of fiber diameter was obvious when the fiber diameter was less than 1μm,and the smaller the fiber diameter, the thermal conductivity decreased faster.