Permeability measurement of textile reinforcements with several test fluids

In liquid composite moulding (LCM) techniques, the liquid resin has to flow a long distance to impregnate the dry fibres. The measure for the resistance of the fibre preform to the resin flow is the permeability of the fibre preform. Because of the dual-scale porous structure of the textile preforms, test fluid can influence the unsaturated permeability values through the interaction of the fluid and fibres. In this study, the influence of test fluid on the permeability measurement of several types of textile reinforcements is investigated. First the contact angle of various fluids and fibres was measured. Then the permeability measurement of the textile reinforcements was carried out. The results showed that the influence of test fluid is small under the test conditions.

[1]  J. Summerscales,et al.  The effect of reinforcement architecture on the long-range flow in fibrous reinforcements , 1995 .

[2]  Richard S. Parnas,et al.  The effect of heterogeneous porous media on mold filling in resin transfer molding , 1991 .

[3]  W. Young.  The Effect of Surface Tension on Tow Impregnation of Unidirectional Fibrous Preform in Resin Transfer Molding , 1996 .

[4]  J. Peeters,et al.  The role of reinforcement permeability in resin transfer moulding , 1993 .

[5]  Alfred C. Loos,et al.  The Effects of Fluid Type and Viscosity on the Steady-State and Advancing Front Permeability Behavior of Textile Preforms , 1997 .

[6]  Ludwig Rebenfeld,et al.  Radial penetration of a viscous liquid into a planar anisotropic porous medium , 1988 .

[7]  John C. Berg,et al.  Simultaneous measurements of permeability and capillary pressure of thermosetting matrices in woven fabric reinforcements , 1991 .

[8]  Vistasp M. Karbhari,et al.  Experimental characterization of permeability and fibre wetting for liquid moulding , 1995 .

[9]  J. L. Kardos,et al.  Accurate permeability characterization of preforms used in polymer matrix composite fabrication processes , 1997 .

[10]  A. Hammami,et al.  Directional Permeability Measurement of Deformed Reinforcement , 1996 .

[11]  Christophe Binetruy,et al.  The interactions between flows occurring inside and outside fabric tows during RTM , 1997 .

[12]  Yunguang Chen,et al.  Capillary Impregnation of Aligned Fibrous Beds: Experiments and Model , 1996 .

[13]  L. J. Lee,et al.  Analysis of resin injection molding in molds with preplaced fiber mats. I: Permeability and compressibility measurements , 1991 .

[14]  L. J. Lee,et al.  Modeling of void formation and removal in liquid composite molding. Part I: Wettability analysis , 1996 .

[15]  Suresh G. Advani,et al.  Permeability characterization. Part 1: A proposed standard reference fabric for permeability , 1995 .

[16]  H. Partanen,et al.  In-plane permeability measurements: a nordic round-robin study , 2000 .

[17]  R. J. Morgan,et al.  Anisotropic Permeability of Fiber Preforms: Constant Flow Rate Measurement , 1993 .

[18]  J. G. Williams,et al.  Liquid flow through aligned fiber beds , 1974 .