is preferred that it be a polyvinyl chloride acrylate copolymer further when the heat curable resin is a polymer it is preferred that it be applied in the form of an emulsion containing polymeric particles predominantly having particles whose diameters are less than the diameters of the filaments in the multifilament yarn when the heat curable resin is monomeric in nature it is preferred that it be applied in the form of an emulsion it is preferred that emulsions be applied to the yarn by means of a rotating ceramic roll immersed in the emulsion since preferential pick up of solids by the yarn from the emulsion may occur it is important to maintain the concentration of the emulsion at the target level and to discard emulsion from which significant preferential pick up has taken place it is preferred that the bonded resin be in the form of irregular globules that bridge adjacent filaments as shown in fig4 and 6 it is preferred that the warp yarns be made from the same polymeric material as the filling yarns it is more preferred that both filling and warp yarns be prepared from a polyester polymer it is preferred that the polyester polymer be poly ethylene terephthalate it is preferred that the bonded resin be predominantly located within the interstices between the filaments as opposed to being predominantly on the outside of the bundle of filaments that form the yarn it is preferred that the filling yarn have zero twist see example 5 c f example 1 test procedures.