Glass filament/adhesive interface

Many structural adhesives are used as films carried by a fabric of textile or glass. This, of course, provides further interfacial surfaces but there is no evidence that wicking of the adhesive occurs either along these interfaces or between the individual filaments which form the yarn from which the cloth is woven. These facts follow from adhesion between adhesive and the carrier filaments and complete penetration of adhesive into the structure of the yam under the pressure and temperature of the curing process. Contrary to expectation the presence of the carrier usually interferes with the diffusion process, slowing it down as moisture diffuses less readily through the polymer of the yarn them through that of the adhesive. 

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