五边形柔性芳纶纸蜂窝的制备及性能

Preparation and properties of pentagonal flexible aramid paper honeycomb

为满足大曲率部件对蜂窝材料柔性的要求,丰富国产芳纶纸蜂窝的种类,进一步拓展国内外蜂窝市场,在传统正六边形芳纶纸蜂窝制造工艺的基础上,优化工艺技术,研制了一种孔格为五边形结构的新型柔性芳纶纸蜂窝ACCH-2I-2.75-48D(孔格边长为2.75 mm,密度为48 kg/m^(3))。测试了三种国产芳纶纸制备的柔性蜂窝的物理性能、力学性能、泊松比及阻燃性能,参照了欧洲复材(EC)相同规格的柔性芳纶纸蜂窝力学性能指标值,且与现有相同规格的正六边形芳纶纸蜂窝(ACCH-2I-2.75-48)和过拉伸芳纶纸蜂窝[ACCH-2I-2.75-48(OX)]的力学性能指标进行了对比。测试结果表明,五边形柔性蜂窝孔格规整,外观无缺陷,物理性能稳定,平面压缩强度、剪切强度和剪切模量达到了EC柔性蜂窝的指标值要求,力学性能达到批次间稳定,蜂窝在纵向和横向均具有良好的柔性且阻燃性能优异。结果证明,五边形柔性芳纶纸蜂窝的制造工艺已完备,研制的五边形柔性蜂窝具有优异和稳定的综合性能,满足作为夹层结构材料芯材的基本要求。

In order to meet the requirements of large curvature parts for the flexibility of honeycomb materials,enrich the types of domestic aramid paper honeycomb,and further expand the honeycomb global markets,a new flexible aramid paper honeycomb ACCH-2I-2.75-48D with a pentagonal structure(the cell size is 2.75 mm,density is 48 kg/m^(3))was developed on the basis of the traditional hexagonal aramid paper honeycomb manufacturing process.The physical properties,mechanical properties,Poisson's ratio and flame retardant properties of three kinds of flexible honeycombs prepared from domestic aramid paper were tested.The mechanical properties of pentagonal flexible aramid paper honeycomb were compared with the requirements of the flexible aramid paper honeycomb of european composites(EC),the hexagonal aramid paper honeycomb(ACCH-2I-2.75-48)and over-expanded aramid paper honeycomb[ACCH-2I-2.75-48(OX)]of the same specification.The results show that the pentagonal flexible honeycomb has excellent properties,which has regular cell size,the stable physical properties and no visible defects.The compressive strength,shear strength and shear modulus can meet the requirements of EC flexible honeycomb,and the mechanical properties are stable between batches.The honeycomb also has good flexibility in both longitudinal and transverse and excellent flame retardant properties.The results show that the manufacturing process of pentagonal flexible aramid paper honeycomb is relatively complete,the pentagonal flexible honeycomb has excellent and stable comprehensive properties,which meets the basic requirements as the core material of sandwich structure material.