Polyester Filaments characterization

CHARACTERIZATION OF HIGH SURFACE AREA POLYESTER FILAMENTS BY MEANS OF WETTING FORCE MEASUREMENTS... 

These surface characterization studies were carried out as part of the Textile Research Institute project "Surface-Controlled Properties of Fibrous Structures," supported by a group of Corporate TRI Participants. The bimorphic polyester filaments were developed under a grant (No-DMR-7905980) to TRI from the National Science Foundation. 

Standard Test Methods for Tire Yarns, Cords, and Woven Fabrics. ASTM standard D885M-94 includes test methods for characterizing tire cord twist, break strength, elongation at break, modulus, tenacity, work-to-break, toughness, stiffness, growth, and dip pickup for industrial filament yams made from organic base fibers, cords twisted from such yams, and fabrics woven from these cords that are produced specifically for use in the manufacture of pneumatic tires. These test methods apply to nylon, polyester, rayon, and aramid yams, tire cords, and woven fabrics. 

The equipment used for melt making is not completely linked to extrusion machinery, since the used melt viscosity in this process is low compared to other spinning processes, in the range of less than 100 pa, eg, PP is used in an MFR rage of 125—3000 (230/2.16). Resins used in the melt blown process are characterized by the already mentioned low viscosity and still some elastic properties in order to be able to spin into filaments. There are no restrictions, so polyolefins, polyesters, polyamides and polyurethanes, as well as bitumen or cellulosic solutions, are possible to process via the melt blown process into filaments. Even high melting point polymers such as Polyphenylensulfid (PPS), Polysulfon (PSU) or even Polyetheretherketon... 

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