Abstract: This invention involves an application of the so-called "riblet" effect to the fabrics used on machines in the papermaking industry. The "riblet" effect itself is a reduction in the measured frictional drag on a surface that is moving relative to a fluid when microscopic grooves are machined on a surface in a direction parallel to that of the motion. Here, this finding is applied to the fibers, filaments, and monofilaments used in the weaving of papermakers fabrics, and to the fibers used to form batts which are needled into the structure of base fabrics, as a way to enhance their water-removing abilities.

Abstract: The disclosure is of a papermakers wet-press felt fabric, felts made therefrom and their use, as wet press felts on papermaking machines.

Abstract: The disclosure is of a high temperature resistant, composite yarn useful in the manufacture of woven and knitted fabrics for high temperature applications. The yarn of the invention comprises a core of a twisted, multi-filament or spun yarn and an outer coating or sheath of a high temperature resistant, synthetic, polymeric resin. The multi-filaments or staple fibers of the core are selected from high temperature resistant, synthetic materials. The outer coating comprises a plurality of coating layers intimately bonded to each other and to the twisted core so as to give the composite yarn of the invention an outward appearance and other characteristics of a monofilament. The composite yarn of the invention combines the properties of a monofilament and a multi-filament or staple yarn and is useful in weaving high temperature resistant fabrics.