Abstract
A study has been made of the mechanical properties of viscose random-laid fabrics, saturation-bonded with at variety of commercial and experimental binder latices. There appears a rational pattern of behavior over all the materials investigated. Thus, fabric stiffness expressed either as initial modulus or bending length is uniquely related to rupture stress over a wide range of binder types and contents. The form of the relation ship indicates that, in a conventional saturation bonded fabric, stiffness cannot be significantly reduced without seriously impairing the strength.
Data obtained with binder films lead to the equation showing fabric modulus Ef to be proportional to binder modulus Eb in the low modulus region and independent of binder modulus in the high modulus region. A similar relationship has been found between fabric and binder rupture stress.
Binder uptake was found to be determined canly by liquor uptake, showing that there was no preferential absorption of either latex particles or of water. In general, fabric strength was linearly related to the amount of binder in the fabric. Variation in latex particle size within the limits 0.1 to 0.5 micron was without effect on the fabric properties.
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