Home About Us Products Technical Documents Contact Us +39.039.2891647 GLASS YARN Glass fiber filaments are obtained by high-temperature melting of inorganic materials which are drawn through a platinum-rhodium bushing, and then rapidly cooled. Glass yarn is formed by combining more single filaments, between 4 to 13 microns depending on yarn count, in a continuous strand. Different glass yarn types are obtained according to the materials used: E – higher electrical characteristics yarn C – corrosion-proof, high chemical resistance yarn ECR – “Boron-free” E glass yarn which shows better corrosion resistance performance R, S, T and S-2 – high tensile strength and high modulus of elasticity yarns Glass Yarn Nomenclature Each of the two most used systems (SI system and US system) has its own Yarn Nomenclature as follows: US SYSTEM Glass Composition: E=Electrical; C=Chemical; S=High Strength, etc Type of Filament: C=Continuous; S=Staple; T=Texturized Filament Diameter: D=5 micrometers ; DE= 6mc; E=7mc; G=9mc, etc Yield Designation: 100 yards/lb. nominal bare glass in basic strand Number of single strands twisted into continuous filament ends/Number of twisted strands plied together; Number of turns per inch in the twist of the final yarn Direction of twist: S=S direction; Z=Z direction Example: E C G 75 1/2 2.8 S E = electrical glass C = continuous filament G = average filament diameter 75 = 7,500 yards/lb. nominal bare glass in basic strand 1/2 = one ply of 2-strand construction 2.8 = the number of turns per inch (TPI) in the twist of the final yarn S = the direction of the twist SI SYSTEM Glass Composition: E=Electrical; C=Chemical; S=High Strength, etc Type of Filament: C=Continuous; S=Staple; T=Texturized Filament Diameter: diameter value expressed in micrometers Yield Designation: Tex value (g/1000ml of yarn) Number of single strands twisted into continuous filament ends x Number of twisted strands plied together; Number of turns per meter in the twist of the final yarn Direction of twist: S=S direction; Z=Z direction Example: E C 9 68 1×2 112 S E = electrical glass C = continuous filament 9 = 9 micrometers 68 = 68 grams per 1,000 meters of yarn 1×2 = one ply of 2-strand construction (total 2 basic strands) 112 = the number of turns per meter (TPM) in the twist of the final yarn S = the direction of the twist GIVIDI FABRICS manufactures Technical Fabrics in one of the most advanced weaving facilities in the world. The quality of its products, the quest for continuous improvement and a passion for innovation characterize GIVIDI FABRICS activity and have contributed to make GIVIDI FABRICS an undisputable reference point in its market segment by delivering high quality innovative solutions that maximize value for the customers. CONTACT US Gividi Fabrics S.r.l. Property of Gividi Group Via Matteotti, 120 20861 Brugherio (MB) Italy Phone: +39.039.2891647 Fax: +39.039.2891690 Email: info@gividi-fabrics.com © 2021 Gividi Fabrics S.r.l. - p.iva 04783740964